What Is My ZIP Code? Find US Codes & Ireland Eircodes

ZIP codes in the US and Eircodes in Ireland serve the same purpose but work completely differently: the US uses five-digit numeric codes, while Ireland uses seven-character alphanumeric Eircodes unique to each address. Here’s how to find yours and what makes them different.

ZIP codes in the United States: 42,000+ ·
Eircodes in Ireland: 2.2 million (approx.) ·
Year ZIP codes were introduced: 1963 ·
Characters in a standard US ZIP code: 5 digits (ZIP+4: 9 digits) ·
Characters in an Eircode: 7 characters (3 letters and 4 digits)

The table below summarizes the key facts about US ZIP codes and Ireland Eircodes.

Is there a ZIP Code for Ireland?

If you’re looking for a “ZIP code” for an Irish address, you won’t find one. The United States has ZIP codes; Ireland has a completely different system called Eircode.

What is an Eircode?

• An Eircode is a unique 7-character alphanumeric postcode assigned to each individual address in the Republic of Ireland (Eircode (national postcode authority)).
• It consists of three letters (routing key) followed by four numbers (unique identifier), e.g., D02 X285.
• Over 2.2 million addresses have been assigned an Eircode (Eircode (official site, address coverage data)).

Why Ireland uses Eircodes instead of ZIP codes

Unlike the US, where one ZIP code serves a group of addresses, Ireland designed Eircodes to pinpoint a single delivery point. This helps in rural areas where many addresses have the same townland name. The system was introduced in 2015 to improve mail sorting and navigation (Gov.ie (Irish government service page)).

The implication: If you’re used to typing a 5-digit ZIP code and getting a city, you’ll need a different mindset for Ireland — the Eircode gets you to a specific door, not a neighbourhood.

How do I find my ZIP Code in Ireland?

Since Ireland doesn’t use ZIP codes, the question really means: how do I find my Eircode? The answer is straightforward through official channels.

Using the official Eircode finder

1. Go to finder.eircode.ie (official Eircode lookup site).
2. Type your address into the search bar. The tool suggests matching addresses as you type.
3. If the address search doesn’t work, click “Use map” and navigate to your property. A pink dot shows buildings that have an Eircode.
4. Click “Get Eircode” when the target is over the building marker (Eircode (official help page)).

Finding an Eircode by address

• If you search by address and see no pink dot, the property may not have an assigned Eircode yet. Contact Eircode customer services for help (Gov.ie (Irish government, customer service guidance)).
• An Eircode can be added to the final line of an address without changing the existing address format (Eircode Finder (official tool)).

How to find an Eircode using third-party tools

Some mapping services, like Caliper (mapping software provider) and Woosmap (geolocation API service), can locate addresses by Eircode. These tools often convert Eircodes into geographic coordinates for navigation.

What this means: Whether you use the official site or a third-party mapper, finding your Eircode takes less than a minute once you know your address.

Are ZIP Code and Eircode the same?

No — and the differences matter if you’re sending mail or entering an address abroad.

Four key differences, one pattern: ZIP codes cover a group of addresses; Eircodes are unique to each dwelling.

Key differences between ZIP codes and Eircodes

• Coverage: A single ZIP code can serve thousands of addresses. An Eircode serves exactly one.
• Intended use: ZIP codes were designed for mail sorting efficiency. Eircodes were designed for precise location identification including navigation (Eircode (national postcode authority)).
• Number of codes: There are about 42,000 ZIP codes in the US, but over 2.2 million Eircodes in Ireland.

Format and structure comparison

• ZIP codes are purely numeric. Eircodes are alphanumeric with a routing key (first 3 characters) indicating the area and a unique identifier (last 4 digits).
• ZIP+4 adds a hyphen and four extra digits for finer granularity but still covers a block or a group of addresses.

The trade-off: If you’re used to memorizing numbers, ZIP codes are easier. If you need pinpoint accuracy for deliveries or emergency services, Eircodes win.

What city is ZIP Code 94568 in?

ZIP code 94568 corresponds to Dublin, California — a city in Alameda County about 35 miles east of San Francisco (USPS ZIP code lookup tool (official postal service)).

Example: Dublin, California

• 94568 covers most of Dublin and small portions of nearby Livermore.
• Dublin, CA is home to over 72,000 residents and is known for its tech workforce.

How ZIP codes map to cities

A single ZIP code can cross into multiple cities or neighborhoods, especially in suburban areas. The USPS maintains the official boundaries, and its ZIP Code lookup (USPS official tool) is the authority for verifying which city a code belongs to.

Why this matters: If you’re filling out a form that asks for your city, don’t assume the ZIP code alone guarantees one answer — check the USPS database.

Which country’s ZIP Code is +353?

+353 is not a ZIP code. It is the international dialing code for the Republic of Ireland (CountryCode.org (telephone code database)).

Understanding country codes vs postal codes

• Country codes (like +353, +1, +44) are used for telephone calls, not mail delivery.
• Postal codes (ZIP codes, Eircodes, postcodes) are used for sorting and delivering mail.
• Never enter a telephone country code in a postal code field — it won’t work.

Ireland’s dialing code +353

If you see +353 in an address context, it’s likely a mistake. Ireland’s postal code system is Eircode. The confusion arises because both are numeric/alphanumeric designations, but they serve completely different purposes (Gov.ie (Irish government, clarifies postal vs dialing codes)).

The catch: Online forms that say “ZIP code” sometimes accept a country code in error, but that won’t get your mail delivered.

“The Eircode system was designed to help the public, businesses, and public bodies locate every individual address in the State.”

Eircode (national postcode authority)

“ZIP Codes are a system of postal codes used by the United States Postal Service to efficiently sort and deliver mail.”

USPS (United States Postal Service)

For anyone moving between the US and Ireland, the difference between ZIP codes and Eircodes can trip you up on shipping forms, online shopping checkout pages, and navigation apps. The confusion is understandable — both are short codes used to locate an address. But the underlying logic is opposite: ZIP codes group hundreds of addresses together; Eircodes isolate one. For the US traveller or expat in Ireland, the decision is simple: when in America, use a 5-digit ZIP from the USPS lookup. When in Ireland, use the 7-character Eircode from the official finder. Mixing them up means lost packages or failed deliveries.

Related reading: What is my zip code in Ireland? Eircode finder, comparison, and how to find it · Eircode Finder – find your postal code in Ireland

For a detailed breakdown of how to find your code in both countries, see this USPS lookup and Eircode guide.

Frequently asked questions