Sharjah Postal Code 2026: The Complete Guide to ZIP Codes, P.O. Boxes, Makani Numbers & Area Addresses

The sharjah postal code is one of the most searched address-related queries by residents, expats, and businesses operating in the UAE — and for good reason. The emirate’s addressing system is fundamentally different from what most people around the world are accustomed to, and without a clear understanding of how it works, filling out online forms, completing international shipping documents, or even setting up utility accounts can become unexpectedly confusing. This guide covers everything you need to know about the UAE postal system as it applies to Sharjah, including what to enter when a form demands a code, how the P.O. Box system works, what Makani numbers are and why they matter, and a comprehensive breakdown of major neighborhoods and their addressing conventions.

Whether you are a new resident settling in, a business owner managing corporate correspondence, or an expat trying to complete an e-commerce checkout, understanding the sharjah postal code situation will save you time and eliminate unnecessary frustration.

What Is a Postal Code and Why Does Sharjah Handle It Differently?

In most countries, a postal code — also called a ZIP code, PIN code, or postcode depending on the region — is a series of digits or alphanumeric characters assigned to specific geographic zones. In the United States, these are five-digit ZIP codes. In the United Kingdom, they are alphanumeric postcodes tied to streets or clusters of buildings. In India, they are six-digit PIN codes allocated at the sub-district level. The fundamental purpose is the same everywhere: to sort and route mail accurately and efficiently without requiring couriers to know every street by name.

The United Arab Emirates, however, was largely built and developed during a period when modern digital navigation tools were already available or on the horizon. As a result, the country never fully adopted the traditional geographic postal code model. Instead, it developed a centralized mail delivery system built around Post Office Boxes — known universally as P.O. Boxes — and later introduced the Makani smart addressing system to handle precise geolocation.

Sharjah and all other emirates in the United Arab Emirates do not have postal codes based on area, the kind used in the US, UK, India, or Europe. No list of Sharjah postal codes distributed by district has been issued by the government. Rather, the UAE has a centralized postal system based on P.O. Boxes, with Emirates Post being the only company that handles mailing and receiving processes as the official postal service in the country.

This means that when someone asks “what is the sharjah postal code for my building,” there is no single definitive answer derived from a government-issued code list. Instead, understanding the system requires knowing how P.O. Boxes, Makani numbers, and placeholder entries like “00000” all come together to serve the same function that a postal code would in other countries.

Does Sharjah Have an Official Postal Code?

The direct answer is no. Sharjah does not have an official postal or ZIP code. The UAE postal system does not divide cities into ZIP regions like in the United States or postal zones like in the UK.

If you have ever tried to fill out an online form while living in Sharjah, you might have run into a confusing situation. Some forms ask for a postcode. But here is the thing: Sharjah does not really use postal codes like other countries do. In many places, people enter a number to show their city or area. The United Arab Emirates, including Sharjah, works differently. There are no regular number-based postal codes.

This is a critically important point to understand early on, because many newcomers assume that the sharjah postal code simply has not been widely publicized, or that it exists in some obscure government database. That assumption leads people to spend considerable time searching for something that does not exist in the conventional sense.

When a form demands a Sharjah postal code, common options include leaving it blank, entering 00000, using “SHJ”, giving a contact number, or using the building’s Makani number.

All of these are accepted approaches and are completely normal for UAE-based addresses. None of them is technically “wrong” because there is no right code to begin with.

The “00000” Placeholder: Why It Works and When to Use It

The most universally accepted workaround for the missing sharjah postal code on digital forms is the five-digit number “00000.” This is not an official government designation — it is simply a placeholder value that has become a standard across the UAE and is recognized by most international platforms, shipping carriers, and payment gateways.

Although Sharjah does not have unique postal codes for its districts, all areas can use “00000” or the relevant P.O. Box. It is always advisable to include the recipient’s P.O. Box for accurate delivery.

The reason “00000” has become so dominant is practical: most digital forms require some kind of entry in the postal code field before allowing users to proceed. Leaving it blank often triggers a form validation error. Entering “00000” satisfies the field requirement without claiming to represent any specific geographic zone.

You may also encounter international websites that refuse to accept “00000” as a valid entry. In those cases, try using “00001” or simply “N/A” as a placeholder. Most logistics and shipping companies understand that the Sharjah postal code is not in active use.

Platforms like Amazon, Noon, AliExpress, and most international e-commerce checkouts accept “00000” for UAE addresses without issue. As of 2026, most courier companies and e-commerce platforms in the UAE rely more on GPS location, Google Maps pins, and Makani numbers instead of postal codes for deliveries. In recent years, many delivery apps in the UAE have removed the requirement for postal codes completely and rely on location sharing instead.

The P.O. Box System: How Mail Actually Reaches You in Sharjah

Since the sharjah postal code as a geographic identifier does not exist, the mechanism that actually ensures mail and parcels reach the correct recipient in Sharjah is the P.O. Box system managed by Emirates Post.

Unlike cities in countries like the US or UK, Sharjah does not have designated postal codes for neighborhoods or streets. The UAE uses a centralized mail system where P.O. Boxes are the primary means of receiving letters and parcels. All mail is sorted and delivered to these rented boxes rather than directly to homes or offices. In place of postal codes, P.O. Box numbers identify recipients.

A P.O. Box (Post Office Box) is a lockable compartment located inside an Emirates Post office branch. Residents and businesses rent these boxes, are assigned a unique number, and can then use that number as their official mailing address. Letters, bills, official documents, and even some courier packages are directed to this box rather than to a physical street address.

How to Rent a P.O. Box in Sharjah

The process of obtaining a P.O. Box in Sharjah is straightforward and can be done either in person at any Emirates Post branch or through their online portal.

For individual residents, the requirements typically include a valid Emirates ID or passport, a completed application form, and payment of the annual rental fee. For companies and corporate entities, a trade license and additional company documentation may be required. Once approved, you receive your P.O. Box number, which then becomes the cornerstone of your mailing address in the emirate.

The benefits of renting a P.O. Box include security — only you have access to your mail; speed — faster mail processing within Emirates Post’s network; confidentiality — ideal for government, corporate, and personal correspondence; accessibility — centralized locations across the city; and digital management — the ability to track and renew online with a few clicks.

A well-structured Sharjah mailing address that incorporates the P.O. Box number looks like this:

Recipient Name P.O. Box [Your Number] [Area Name], Sharjah United Arab Emirates

This format is recognized by Emirates Post, international couriers, government agencies, banks, and virtually every institutional sender or recipient that does business with Sharjah-based addresses.

The Makani Number System: Sharjah’s Answer to Geographic Precision

While the P.O. Box system handles mail delivery effectively, it does not solve the problem of physically locating a specific building or apartment for door-to-door deliveries, emergency services, or navigation. For that purpose, the UAE government introduced the Makani Number system.

Makani is a smart addressing system used in the UAE. Each building gets a unique Makani number that acts as its exact address. One number per building: every building has its own Makani number, so there is no confusion about which building you mean. Precise geolocation: the Makani number is tied to the building’s precise spot on the map, which is very useful for services like ambulances, delivery trucks, or taxi drivers. Digital-friendly: the system is designed to work well with modern technology such as phone map apps and online platforms.

Every building in Sharjah — residential towers, villas, commercial complexes, government buildings — has been assigned a unique 10-digit Makani number. This number is typically displayed on a signboard near the building entrance, making it easy for couriers, emergency responders, and visitors to locate the precise entry point.

The Makani system was developed to overcome the limitations of a non-traditional postal code structure. It ensures unparalleled accuracy for navigation and delivery services. Each Makani number correlates to a specific entry point of a building, which means couriers, emergency services, and even friends can find your precise location with ease. This system is a cornerstone of modern urban planning in the UAE.

The practical implication for residents and businesses is significant. If you are expecting a delivery from Aramex, DHL, FedEx, or any courier service, providing your Makani number alongside your P.O. Box and area name virtually eliminates the risk of a missed or misdirected delivery. Makani numbers are widely used by courier companies like Aramex, DHL, and Amazon UAE for precise delivery location identification.

How to Find Your Building’s Makani Number

Your building’s Makani number can be found in several ways. The most straightforward method is to check the signboard mounted near the main entrance of your building — it should display the 10-digit number clearly. Alternatively, you can use the official Makani app (available for iOS and Android) by searching your building name or location on the map. The Dubai Municipality website also provides access to the Makani lookup tool, which covers buildings across multiple emirates.

Sharjah’s GIS-Based Postal Code System: An Important Context

The Sharjah Urban Planning Council (SUPC) launched its Postal Code System (PCS) in 2015. This initiative introduced over 102,000 postal code signboards to buildings. These display a unique 5-digit code, primarily linked to a Geographic Information System (GIS). This sophisticated mapping tool helps locate buildings precisely for municipal planning, emergency services, and logistics. However, these 5-digit codes are not typically used for general mail delivery to individual homes or businesses.

This is a nuance many guides overlook. There IS a form of building-level coding in Sharjah through the GIS/PCS initiative, but it is an urban planning and emergency services tool, not a postal delivery mechanism in the way ZIP codes function in the United States. Residents should not confuse these GIS codes with a usable sharjah postal code for standard mail or online forms.

Major Areas in Sharjah and Their Address Conventions

Since there are no area-specific postal codes in the traditional sense, the following table illustrates how major neighborhoods in Sharjah are addressed, using the accepted “00000” placeholder and P.O. Box format.

Area / Neighborhood	Placeholder Postal Code	Address Format Notes
Al Majaz	00000	Use P.O. Box + Al Majaz, Sharjah, UAE
Al Nahda	00000	Use P.O. Box + Al Nahda, Sharjah, UAE
Al Khan	00000	Use P.O. Box + Al Khan, Sharjah, UAE
Al Qasimia	00000	Use P.O. Box + Al Qasimia, Sharjah, UAE
Al Taawun	00000	Use P.O. Box + Al Taawun, Sharjah, UAE
Al Nasserya	00000	Use P.O. Box + Al Nasserya, Sharjah, UAE
Al Ghafiya	00000	Use P.O. Box + Al Ghafiya, Sharjah, UAE
Al Mamzer	00000	Use P.O. Box + Al Mamzer, Sharjah, UAE
Al Rawda	00000	Use P.O. Box + Al Rawda, Sharjah, UAE
Muwaileh	00000	Use P.O. Box + Muwaileh, Sharjah, UAE
Al Dhaid	00000	Use P.O. Box + Al Dhaid, Sharjah, UAE
Sharjah Industrial Area	00000	Use P.O. Box + Industrial Area, Sharjah, UAE
Al Qasbaa	00000	Use P.O. Box + Al Qasbaa, Sharjah, UAE
Al Hazanna	00000	Use P.O. Box + Al Hazanna, Sharjah, UAE
Halwan Suburb	00000	Use P.O. Box + Halwan, Sharjah, UAE

Mail is delivered via P.O. Boxes, and precise locations are identified with Makani numbers across all these areas.

Al Majaz

Al Majaz is one of Sharjah’s most prominent residential and commercial zones, situated along the picturesque Khalid Lagoon waterfront. Al Majaz is an enviable waterfront residential zone located near Khalid Lagoon, where addresses are based on building details and P.O. Box numbers. The area is home to high-rise apartment buildings, hotels, parks, and a thriving dining and retail scene. Residents here follow the standard addressing system: name, P.O. Box number, Al Majaz, Sharjah, UAE. fab balance check salary online

Al Nahda

Al Nahda sits on the Sharjah-Dubai border and is one of the most densely populated areas in the emirate. Al Nahda, a vibrant locality in Sharjah, UAE, is known for its proximity to Dubai and Sharjah’s other bustling neighborhoods. The area is popular among families and professionals due to its connectivity, amenities, and lifestyle offerings. Because of its strategic location, Al Nahda is frequently chosen by commuters who work in Dubai but prefer Sharjah’s more affordable rents.

Al Taawun

Al Taawun is a mid-scale residential and commercial neighborhood that bridges Al Nahda and Al Qasimia. It is well-connected by public transport and offers a blend of residential towers and commercial outlets. For mail purposes, all Al Taawun addresses follow the same P.O. Box convention, with “00000” used wherever a postal code is mandated.

Al Qasimia

Al Qasimia is one of Sharjah’s established neighborhoods where traditional mail delivery relies on P.O. Box numbers. For sending mail to this area, use the full address: building or street name, P.O. Box number, and “Sharjah, UAE.” Al Qasimia is also home to some of Sharjah’s oldest commercial districts and is well known among long-term residents of the emirate.

Al Khan

Al Khan is a coastal neighborhood known for its proximity to the Arabian Gulf and Al Mamzar Beach Park on the Dubai border side. Like all other Sharjah districts, there is no area-specific Al Khan sharjah postal code. Residents use their P.O. Box number and the standard placeholder.

Muwaileh

Muwaileh has grown rapidly over the past decade and is now one of the most sought-after areas for families relocating to Sharjah. It offers a range of villa communities, apartment complexes, international schools, and hospitals. The addressing system follows the same convention as all other parts of the emirate.

How the Sharjah Industrial Area Handles Postal Addresses

The Sharjah Industrial Area is a major economic zone that houses thousands of factories, warehouses, logistics companies, and manufacturing units. Businesses operating within this zone often deal with higher volumes of international correspondence, shipping documentation, and courier traffic.

There are no region-specific codes for the Sharjah Industrial Area. Businesses should use their P.O. Box number when formatting any address from within the industrial zones. For international shipments, companies in the industrial area typically list their full corporate P.O. Box, the street or plot number within the industrial zone for physical delivery by courier, and “Sharjah, UAE” as the destination.

Comparing Sharjah’s System to Dubai and Abu Dhabi

Many residents who relocate from Dubai or Abu Dhabi to Sharjah often wonder whether the sharjah postal code situation is unique or whether the same system applies across the UAE.

The reality is consistent across all seven emirates. Like Abu Dhabi, Sharjah also does not have a specific postal code or zip code to use. You can use 00000 or N/A to fill the information gap when writing mailing addresses. Dubai’s addressing system is equally reliant on P.O. Boxes and Makani numbers, with “00000” serving as the placeholder wherever a postal code field cannot be left blank.

The key difference across emirates is not the postal code — since none of them have proper area-based codes — but the availability of Emirates Post branches, the density of P.O. Box infrastructure, and the degree to which various neighborhoods have been fully mapped into the Makani system.

International Shipping to Sharjah: What You Need to Know

Sending and receiving international mail to and from Sharjah requires a clear understanding of the addressing conventions so that parcels are not returned or delayed. For businesses that regularly deal with international suppliers, clients, or customers, getting this right is critical.

Sharjah uses P.O. Box numbers instead of conventional ZIP codes or postal addresses. To ship internationally, enter 00000 and include the valid P.O. Box number if you have one. Most courier companies prefer a P.O. Box number.

For international shipments arriving in the UAE, major carriers including DHL, FedEx, Aramex, and UPS have well-established networks that understand the local addressing system. When you are providing your Sharjah address to an overseas shipper, the recommended format is:

Full Name P.O. Box [Number] [Area Name], Sharjah United Arab Emirates Phone: [Your Mobile Number] Postal Code: 00000

Including your mobile number is particularly helpful because many international couriers contact recipients by phone when navigating UAE addresses. Adding your Makani number as a supplementary field whenever possible further improves delivery accuracy.

What Happens If You Enter the Wrong Postal Code?

In case you have inserted the wrong postal code, you should make sure you correct it at the earliest instance. You are advised to contact the local postal service and inform them how you can rectify the address before the mail can be sent.

In practice, since the sharjah postal code field is largely treated as a placeholder, entering an incorrect value rarely results in mail going to the wrong place. The actual routing of mail within Sharjah is handled by the P.O. Box number and the recipient’s name, not the postal code entry. However, for international shipments and certain official documents, accuracy in every address field matters more, and it is worth ensuring you are using “00000” consistently to avoid any automated system rejections.

Using Emirates Post Services in Sharjah

Emirates Post is the official postal authority of the UAE and operates branches throughout Sharjah covering all major neighborhoods and commercial zones. Beyond P.O. Box rentals, Emirates Post provides a comprehensive range of services relevant to residents and businesses alike.

Their service portfolio includes domestic and international mail and parcel delivery, registered mail for legal and official documents, express delivery through the Speed Post service, Smart Post digital services for tracking and notifications, domestic money transfer services, and passport and government document processing at selected branches.

After renting a P.O. Box, you are assured of safe reception of mail, bills, and packages. Government postal services do not provide home delivery of letters. Alternatively, parcels can be delivered by private courier firms on a door-to-door basis.

Emirates Post branches in Sharjah are located in most commercial centers and accessible areas across the city, including Al Majaz, Al Nahda, Al Qasimia, Muwaileh, Al Khan, and the Industrial Area. You can also manage your P.O. Box subscription, renew annual fees, and update registered contact details through the Emirates Post official website and mobile application.

Private Couriers and How They Handle Sharjah Addresses

While Emirates Post manages the official postal network, the majority of e-commerce deliveries and corporate courier shipments in the UAE are handled by private logistics companies. Major players operating in Sharjah include Aramex, DHL Express, FedEx, UPS, Fetchr, and SMSA Express, among many others.

These companies typically do not rely on postal codes at all for UAE deliveries. Instead, their systems are built around GPS coordinates, Makani numbers, area names, building names, street names, and direct contact with recipients by mobile phone. Makani numbers are widely used by courier companies like Aramex, DHL, and Amazon UAE for precise delivery location identification.

When placing an order on any major platform — whether it is Amazon.ae, Noon, Namshi, or an international retailer shipping to the UAE — the checkout process is designed to accommodate UAE-specific addressing. You will be asked for your area name, building name or number, floor and apartment number, and a contact number. The postal code field will accept “00000” without issues.

Sharjah Postal Code for Visa Applications and Government Forms

One context where the sharjah postal code question becomes particularly pressing is during visa applications, both within the UAE government portals and through international embassies and consulates. Many visa application systems used by countries including the UK, USA, Canada, Australia, and Schengen nations have mandatory postal code fields tied to the applicant’s country of residence.

For UAE-based applicants entering a Sharjah address, the standard approach is to enter “00000” in any postal code or ZIP code field. This is widely recognized as the accepted entry for UAE addresses on international visa platforms, and consular staff are generally familiar with the fact that the UAE does not use a conventional postal code system.

If an online visa application system specifically rejects “00000” or does not accept it as a valid format, applicants can try “00001” or reach out directly to the relevant embassy for guidance. In some cases, entering the area-level Makani code or the P.O. Box number may also satisfy the requirement, depending on what the specific system accepts.

Addressing Corporate Correspondence in Sharjah

For businesses operating in Sharjah — whether in free zones, the mainland, or the industrial area — having a properly structured mailing address is important for trade license documentation, bank correspondence, supplier invoicing, and regulatory communications.

A P.O. Box is mandatory for business setup and trade licenses, and aids in the acceptance of mails and parcels while making online shopping and billing easier and ensuring government services and applications are processed correctly.

Corporate addresses in Sharjah typically follow this structure:

Company Name P.O. Box [Number] [Area/Zone Name], Sharjah United Arab Emirates Tel: [+971 6 XXXX XXXX]

For free zone companies, the free zone name is often included as well — for example, SAIF Zone (Sharjah Airport International Free Zone) or SHAMS (Sharjah Media City) — as these zones have their own sub-addressing conventions within the broader Sharjah address framework.

Tips for Residents: Making the Most of Sharjah’s Postal System

Living in an emirate without a traditional postal code requires adapting to a different set of best practices for mail, deliveries, and official correspondence. Here are the most practical steps you can take:

Get a P.O. Box as early as possible. If you plan to receive any regular correspondence in Sharjah — whether that is bank statements, utility bills, official government letters, or personal mail — a P.O. Box is an essential investment. The annual cost is reasonable, and it provides a permanent, reliable address that works regardless of where you move within the emirate.

Know your Makani number. Find the 10-digit Makani number for your building and save it. Share it with couriers, emergency contacts, and anyone who may need to physically find your location. It will dramatically reduce failed or delayed deliveries.

Use “00000” consistently. Whenever any online or paper form requests your sharjah postal code, ZIP code, or PIN code, entering “00000” is the universally accepted standard. This keeps your records consistent across platforms and avoids confusion.

Include your mobile number in every address. UAE delivery culture is heavily phone-call dependent. Couriers will call you when they are nearby, especially for residential deliveries. Always include your UAE mobile number in full international format (+971 XXXXXXXXX) when providing your address.

Check your P.O. Box regularly. Always double-check that your P.O. Box subscription is active. Expired boxes can cause returned mail. Emirates Post sends reminders before renewal dates, but staying proactive ensures nothing important gets missed.

The Future of Addressing in Sharjah

The trend across the UAE is toward greater integration of digital addressing tools. Makani numbers are becoming increasingly embedded in navigation apps, government portals, and courier systems. The ongoing expansion of smart city infrastructure across Sharjah — in line with the Sharjah Urban Planning Council’s vision — points toward a future where every building is perfectly mapped, located, and identifiable without any reliance on traditional postal codes.

Expect to see more apps and services integrating Makani numbers. Over 90% of locations in Sharjah, including all residential areas, already share the 00000 postal code, emphasizing the need for alternative addressing methods like Makani.

As e-commerce continues to grow in the UAE and delivery expectations become increasingly time-sensitive, the Makani system is positioned to become the dominant addressing standard — not just in Sharjah but across all seven emirates. For residents and businesses, this means the most forward-looking approach to address management is to combine a valid P.O. Box with a well-communicated Makani number.

Frequently Asked Questions

What is the sharjah postal code I should enter on forms?

Since Sharjah does not have an official postal or ZIP code, you can safely use “00000” on any form that requires a postal code. This is the standard practice for residents, businesses, and government institutions across Sharjah.

Can I use a different number instead of 00000?

Yes. If an international website refuses to accept “00000” as a valid entry, try using “00001” or simply “N/A” as a placeholder. Both are widely accepted across UAE-aware platforms and shipping systems.

Is the Makani number the same as a postal code?

No. A Makani number is a 10-digit building-level geolocation identifier, not a postal code. It serves a similar purpose in terms of finding a building’s precise location, but it is not used for mail sorting in the traditional postal code sense. Think of it as a GPS address for your building.

How do I get a P.O. Box in Sharjah?

Visit your closest Emirates Post branch, provide your Emirates ID or passport, choose whether you need a personal or corporate P.O. Box, complete the form, pay the annual fee, and collect your P.O. Box number. You can also initiate the process online through the Emirates Post website.

Do all areas in Sharjah use 00000?

Yes. All areas in Sharjah use 00000 in place of postal or zip codes. There are no area-specific codes for Al Majaz, Al Nahda, Al Taawun, Al Khan, Muwaileh, or any other district within the emirate.

What is the postal code for Al Nahda Sharjah specifically?

The universally accepted postal code for Al Nahda, Sharjah, is 00000. This five-digit code is used as a default for the entire emirate, including all areas within Al Nahda 1 and Al Nahda 2. Some unofficial sources list “500001” for Al Nahda, but the government-recognized standard remains 00000.

Can I receive home delivery without a P.O. Box?

Yes, for courier-based deliveries. Private carriers like Aramex, DHL, and FedEx deliver directly to your door using your building address, area name, and Makani number. However, official Emirates Post mail cannot be home-delivered — it goes to your P.O. Box.

Does Sharjah’s industrial area have a different postal code?

There are no region-specific codes for the Sharjah Industrial Area. Businesses should use their P.O. Box number in all address formats. The same “00000” placeholder applies.

How do I format a Sharjah address for international shipping?

The recommended format is: recipient name, P.O. Box number, area name, Sharjah, United Arab Emirates, with “00000” in the postal code field and your UAE mobile number included. Adding your Makani number as a supplementary detail improves delivery precision.

Is there any chance the UAE will introduce proper postal codes in the future?

While the Sharjah Urban Planning Council has introduced GIS-linked building codes for planning and emergency use, and while the Makani system continues to expand, there has been no official government announcement of plans to adopt a nationwide area-based postal code system comparable to the US ZIP code or UK postcode model. The P.O. Box and Makani combination continues to serve the emirate’s postal and navigation needs effectively.

Summary

Understanding the sharjah postal code situation comes down to a few core facts. Sharjah does not use a traditional area-based postal code system. The standard placeholder accepted on virtually all digital and paper forms is “00000,” with “00001” and “N/A” as acceptable alternatives when the primary placeholder is rejected. The true backbone of mail delivery in Sharjah is the P.O. Box system administered by Emirates Post, which assigns every registered individual and business a unique mailbox number at a local post office branch. For physical location and door-to-door delivery, the Makani number system provides a precise 10-digit identifier tied to every building in the emirate. Together, these three elements — “00000” as a form placeholder, P.O. Box for mail reception, and Makani number for location identification — form the complete addressing ecosystem that residents, businesses, and logistics companies navigate every day in this thriving UAE emirate.

Whether you are completing a visa application, setting up a new bank account, registering a business, placing an online order, or simply telling a friend how to find your building, the combination of a valid P.O. Box number and a clearly communicated Makani number will serve you far more reliably than any postal code ever could.