Postal Code E21 - Cahir, Munster, Ireland
Postal Code: E21
Postal System Details
Postal Authority
An Post
Postal System
Eircode (seven-character alphanumeric: A65 B2CD)
Region Structure
Routing Key Area → Local Delivery Unit (Unique Address Identifier)
Area Information
The postal code E21 corresponds to Ireland’s Eircode system, administered by An Post, the national postal authority of Ireland. Eircodes follow a seven-character alphanumeric format such as A65 B2CD (illustrative only). The first three characters, known as the Routing Key, represent a broad geographic area. The remaining four characters form a Unique Identifier that pinpoints each individual address. This code applies to Cahir within the Munster county or region, located near latitude 52.3769 and longitude -7.9217. Routing follows the structure: Routing Key Area → Local Delivery Unit (Address-Level Identifier). Example mapping: - County/Region: Munster - Locality: Cahir - Routing Key: Derived from the first three characters - Unique Identifier: Based on last four characters This page follows Eircode routing principles published by An Post. All examples are illustrative. For accurate delivery, the full seven-character Eircode must match the intended address in Cahir, Munster, Ireland.
Country:
Ireland
State:
Munster
Area:
Cahir
Postal Code:
E21
Latitude:
52.3769
Longitude:
-7.9217
Frequently Asked Questions
1. How does E21 work in Ireland?
It identifies both the routing area and the unique delivery point for Cahir in Munster.
2. What makes Eircodes unique?
Each Eircode maps to one specific address, improving accuracy and navigation.
3. Can E21 verify an address in Ireland?
Yes—if the full seven-character code matches the building-level identifier.
4. Which authority manages postal codes in Ireland?
An Post oversees the national Eircode routing system.