ZIP Codes vs Postcodes in Australia

What is the one address element you must add to ensure your mail gets delivered to the right location? It is the postal code, or you might call it the ZIP code or post code depending on your location. ZIP code is the term used for postal codes in the United States and the Philippines. Postcodes, on the other hand, are used in countries like Australia and Canada. They help determine the geographical region and can pinpoint specific locations, neighborhoods, or even individual buildings. 

Did we just make you think is a ZIP code the same as a postal code? In this blog, we will cover everything related to postal code, including ZIP vs. postal code, ZIP vs. postcodes in Australia, and more.

Key Takeaways

• ZIP codes are the codes written at the end of an address while sending mail to the US. They play a crucial role in ensuring accurate mail delivery.
• Postcodes are the coding system in Australia. Aside from mail sorting and delivery, they help gather geographic information that can be used in marketing.
• Postal code is the coding system that countries across the world use for efficient mail delivery. The primary difference between a postal code and a ZIP code is the format and purpose.
• It is important to write correct ZIP codes and postcodes to ensure accurate and timely delivery. These codes can also help in delivering location-based and emergency services.
• To validate ZIP codes and postcodes, you can use PostGrid’s address verification API, which cross-references address information with official postal records for over 245 countries.

What is a ZIP Code?

The ZIP code refers to the Zone Improvement Plan, which is a coding system developed by the United States Postal Service in 1963. This five-digit numeric code is used to identify mailing zones, determine the collection of mailing addresses within the US, and simplify sorting and delivery. The ZIP codes do not align with the geographic location of cities, towns, counties, or states and rather combine city, state, country, street address, and other details into a code At present, there are 41,642 ZIP codes in the US. 

Depending on the volume of mail a location receives, a ZIP code may cover a small area or a high-rise building. It can cover multiple towns or a few city blocks. Organizations and institutions receiving a large volume of mail may have their ZIP code. Take, for instance, the Empire State Building, which has its own ZIP code that is 10118. You should always use a ZIP code when writing either domestic or international mail to the US. They should be written after the city and state and be on the same line. The format to write an address in the US with a ZIP code is as follows:

You can look up and verify ZIP codes through the USPS address verification API. However, it has certain drawbacks. You cannot bulk verify addresses, and it does not offer services like geocoding and address autocomplete. A better alternative to USPS is PostGrid’s address verification API, which will not only verify the ZIP codes but also provide additional address information like geocodes and delivery point validation information. We also provide complete address information down to the ZIP+4 code, apartment number, and suite number. With us, you can verify over 200k addresses in one go. 

ZIP+4 Codes

To speed up delivery and ensure accurate mailing, the USPS designed a ZIP+4 code in 1983. Now the full ZIP code comprises an additional four digits appended to the standard code. They help identify a more specific area within a ZIP code, such as an apartment building or a post office box. It should be written with a hyphen after the standard ZIP code, like 14123-1457.

Breakdown of ZIP Code Format

Let us take an example of 31217 to understand what each digit in a ZIP code represents. The first digit identifies one of the ten large areas of the nation. The regions in the US are numbered from 0 (Northeast) to 9 (West). In this case, 3 represents the southeastern US, including Georgia, Alabama, Tennessee, and Florida. 

The set of the next two digits represents the sectional center facility. It is the mail processing and distribution institution for a particular area. Here it represents the area serviced by the central facility in Macon, Georgia. The remaining two digits denote the local post office or the neighborhood serviced by the sectional center facility. Hence, the ZIP code 31217 represents street information in Macon.

Introduced in 1959, postal code is a coding system followed by countries worldwide to simplify the sorting and distribution of mail. If you are wondering is postal code the same as ZIP code, the answer is no, it is not. ZIP codes only have numbers. Postal codes, on the other hand, can be numbers and letters or alphanumeric characters, depending on the postal authority of the respective country. Take, for instance, the postal code in Canada has the format X0X 0X0. 

Another postal vs. ZIP code factor is the purpose. The ZIP code is mainly used for sorting and delivery of mail, but postcodes can also be used to gather demographic data and generate route plans. Another thing to remember when talking about postal code vs zip code systems is who manages them. ZIP codes are managed by USPS, but postal codes are managed by the national postal departments of the respective countries. 

Now that you have explored zip code vs. postal code and ZIP codes vs. postcodes in Australia, let us understand the significance of writing correct codes.

Ensure Accurate Mail Delivery

With the wrong ZIP code or postcode, the mail might end up in the wrong hands. This can be concerning, especially when the package contains sensitive or confidential information. Since these codes pinpoint a particular delivery location, knowing the accurate code can help a courier service provider make correct deliveries. This will prevent delay, misdelivery, and any loss of the item.

Reduce Return Mail

Incorrect or missing codes can result in misdelivery or failed deliveries. The mail will be returned to the sender in case of failed deliveries. The sender must correct the address and send the mail again. Some courier service providers charge additional fees for the correction of addresses. Moreover, incorrect codes often demand manual intervention to determine the correct code, leading to delays. Correct codes will ensure that the mail is directed to the correct delivery office and is sent to the correct address.

Enable Location-Based Services

Since the postcodes help identify the specific region and neighborhood, businesses can use them to offer location-based services. After gaining insights into whether or not their products and services are available in a particular zone, they can set up stores, pick-up points, and service centers.

Avoid Delay in Critical Services

Incorrect or missing ZIP codes and postcodes can result in delays in an emergency, such as someone needing immediate medical assistance. Since healthcare providers can use these codes to identify the precise location, they can route an emergency medical team or ambulance to prevent delays.

Enhance Targeted Marketing

Businesses can use the data provided by ZIP codes and postcodes to identify their target demographics and devise marketing strategies catering to their needs. For instance, a food delivery app can use these codes to suggest nearby restaurants to the customers. This will improve relevancy and customer satisfaction.

By now you have gained a deep understanding of postcodes in Australia, ZIP codes, and postal codes. To ensure accurate delivery, you must verify them, and we can help you in this regard. PostGrid offers a comprehensive address verification API to verify address elements like ZIP codes or postcodes, depending on the country. You can upload a CSV file of your address, and our solution will verify and return accurate and detailed address information. We cross-reference with official records as we are AMAS-certified. We check the addresses against the Australia Post postal address file and return the correct and up-to-date address details. Similarly, if you want to check the ZIP code, we have access to the official postal databases of USPS, and we use it to verify all the address components. 

Besides Australia and the US, we offer address verification solutions for over 245 countries and territories. Moreover, with our autocomplete API, you can get verified and highly detailed addresses down to the building, floor, and suite number. This minimizes the possibility of data entry errors and enhances mail deliverability. If you want to know how our address verification API can help you with postcode look-up and ensure your package gets delivered to the correct address, request a demo today.