About An Post
An Post is the state-owned provider of postal services in the Republic of Ireland. An Post provides a "universal postal service" to all parts of the country as a member of the Universal Postal Union.
An Post Tracking number Instructions:
The An Post tracking number format is usually comprised of 2 alphabetic characters, 9 numeric characters, and 2 alphabetic characters. An Post tracking number format: 2 letters + 9 digits + 2 letters.
An Post tracking number example: