Ireland Address Validation,
Verification, and Autocomplete

You can explore all our address validation solutions in one place, including the Master address list, Address validation service, International address verification, USPS address verification tool, Bulk address validation, and Address autocomplete.

A valid Irish address follows the national address structure and includes a valid Eircode. Check that it contains the house number and street name, the locality, the county where applicable (outside Dublin), and the Eircode. The Eircode must match the A99 AAAA format: a three-character routing key followed by a four-character unique identifier.

Because each Eircode identifies a single residential or business address, checking it against a reference dataset such as the GeoPostcodes Eircode database lets you validate the exact property rather than just the surrounding area.

Ireland’s postal code format is A99 AAAA, with seven alphanumeric characters split into two parts:

Examples: D01 NY06 (Dublin), T12 T997 (Cork), H91 39N6 (Galway), V94 AE44 (Limerick).

Eircode is licensed by Capita Business Support Services Ireland, trading as Eircode, and available through authorized resellers, including GeoPostcodes.

An Irish address follows this structure:

1. Recipient’s name
2. House number and street name
3. County name (outside Dublin)
4. City name and Eircode

For example:
John Smith
16 Gardiner Place
Dublin D01 NY06

Address validation checks whether an address is properly structured, complete, and follows postal standards. Address verification goes further by confirming that the address actually exists and is linked to a real recipient.

In Ireland, validation includes checking that the address follows the national structure and that the Eircode matches the A99 AAAA format. Verification means confirming that a real person or business is associated with that specific address. Most businesses benefit from both: validation for overall data quality, and verification for higher-risk use cases such as compliance and fraud prevention.

Yes. Ireland’s postal code system is called Eircode and was introduced in 2015. Each Eircode is a seven-character alphanumeric code in the A99 AAAA format and uniquely identifies one of the country’s 2.4 million residential and business addresses.

The first three characters form the routing key, which identifies a broad geographic area. The final four characters identify the individual address.

Start by checking the address structure: house number and street name, locality, county where applicable (outside Dublin), and Eircode. Then verify the address itself against a reference dataset such as the GeoPostcodes Eircode database, which covers all 2.4 million Irish addresses with their full seven-character Eircode.

Bulk validation means checking large volumes of records against Irish postal structure and the full Eircode dataset. API-based services process addresses one at a time, which introduces per-call costs, rate limits, and latency at scale.

A self-hosted reference database lets you validate Irish addresses locally, with no API calls, no per-record fees, and no dependency on third-party uptime. The GeoPostcodes Eircode database delivers all 2.4 million Eircodes as a downloadable file you can integrate directly into your validation pipeline.

Ireland has 2.4 million Eircodes, covering 57,726 localities across 3,488 administrative regions.

Eircode is licensed by Capita Business Support Services Ireland, trading as Eircode. GeoPostcodes is an official reseller and provides the full dataset with regular updates.

New Eircodes are assigned continuously as new residential and business addresses are built in Ireland. Updates to the full dataset are published by Eircode every quarter.

Businesses that rely on Irish address data should use a regularly updated reference database rather than a one-time export toi avoid mismatches over time.