Ireland ZIP Code Dataset

Eircodes are Ireland’s postal codes. Each Eircode is a seven-character alphanumeric code that uniquely identifies a single residential or business address, with 2.2 million codes covering every address in the country. Introduced in 2015, they were the first public system of unique identifiers for all Irish addresses.

Each Eircode has two parts: a three-character routing key indicating a broad geographic area, and a four-character unique identifier assigned to a specific building or address. For example, D01 NY06 identifies a single property in Dublin.

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

• Routing key (first three characters): one letter followed by two digits, indicating a broad geographic area. There are 139 routing keys covering all of Ireland.
• Unique identifier (last four characters): a combination of letters and digits assigned to a specific building or address, with no sequential pattern.

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

No. Unlike most European postal code systems, Eircode data is not open data. The full dataset is licensed by Capita Business Support Services Ireland, trading as Eircode, and available through authorized resellers, including GeoPostcodes.

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.

An Irish address follows this structure:

• Recipient’s name
• House number and street name
• County name (outside Dublin)
• City name and Eircode

For example:

See the full Ireland address format guide.

Yes. Ireland’s postal code system is called Eircode, a seven-character alphanumeric system introduced in 2015. The name is different from the American ZIP code, but the concept is similar.

Eircodes are more granular than US ZIP codes. A US ZIP code covers a geographic area, while each Eircode identifies a single residential or business address. This makes Eircode one of the most granular postal code systems in Europe.

Eircodes bring precision to Irish addressing, with practical benefits across operations:

• More accurate address validation: Identify every Irish address with Eircode, including the 35% that are non-unique.
• Improved delivery success rates and better route optimization: Use unique Irish address points to plan more precise last-mile routes and schedules.
• Stronger fraud detection and risk assessment: Detect inconsistent or fake Irish addresses in identity checks.
• Audit-ready address data for regulated industries: In financial services, insurance, and utilities, Eircode provides a defensible, auditable identifier for every Irish address.
• Cleaner customer databases: Reconcile, combine, and clean duplicate or inaccurate Irish addresses.
• Easier checkout and onboarding: Reduce checkout friction and cart abandonment with Eircode-powered address autocomplete.
• More precise customer targeting: Tailor customer service, sales, and marketing based on accurate customer location.

The complete Eircode dataset is not publicly downloadable. It is licensed by Capita Business Support Services Ireland, trading as Eircode, and distributed through authorized resellers.

GeoPostcodes delivers the full Ireland Eircode dataset as text files (the most popular format is CSV) that you can easily integrate into your databases and processes. Download a sample or request pricing to discuss your project.

A routing key is the first three characters of an Eircode, one letter followed by two digits, such as D02 or H53. It indicates a broad geographic area, similar to the outward code in a UK postcode. There are 139 routing keys covering all of Ireland.

Routing keys are the more widely available part of the Eircode system and appear in publicly accessible references. The full seven-character Eircode, including the four-character unique identifier that points to a specific building, is licensed data and requires a license from Eircode or an authorized reseller.

GeoPostcodes licenses both routing keys and full Eircodes, so you can choose the level of granularity that fits your use case.