Ireland • NPA 57 ☎️ Central Office Exchange (NXX)

+353 (57) 231 Exchange Code

Technical registry directory for telephone subscriber numbers starting with +353 (57) 231. Central office block assigned to Portlaoise/Abbeyleix/Tullamore/Birr, Ireland.

Standard Subscriber Format

+353 (57) 231-XXXX

Telecom Carrier Local Network Carrier

Area Code (NPA) 57

Primary Location Portlaoise/Abbeyleix/Tullamore/Birr

Service Type Landline

📋 Central Office Exchange 231 Routing Details

The 231 exchange code (central office prefix) operates within the 57 Numbering Plan Area (NPA) servicing Portlaoise/Abbeyleix/Tullamore/Birr, Ireland. All assigned subscriber lines in this block follow ITU-T E.164 national routing protocols.

Telecommunication services within the +353 (57) 231 prefix range are primarily provisioned by Local Network Carrier, delivering local landline voice lines and network routing.

🌐 Dialing Instructions

• Domestic Calls: Dial 057 231-1234 or local national format.
• International Calls: Dial +353 57 231-1234 from outside Ireland.
• E.164 Standard: +35357231XXXX

📞 Nearby Exchanges in Area Code 57

View All Area Code 57 Exchanges ›

(57) 932 (57) 318 (57) 461 (57) 305 (57) 974 (57) 962 (57) 236 (57) 852 (57) 627 (57) 917 (57) 945 (57) 799 (57) 963 (57) 366 (57) 413 (57) 376

❓ Frequently Asked Questions

What area code is +353 (57) 231?

Phone numbers starting with +353 (57) 231 belong to the 57 area code in Portlaoise/Abbeyleix/Tullamore/Birr, Ireland, routed via exchange block 231.

How do I call a 231 exchange number from abroad?

To call this prefix internationally, dial your local exit code (e.g., 011 in North America or + globally), followed by +353, then 57, and the subscriber number.

Which provider operates the 231 prefix in Portlaoise/Abbeyleix/Tullamore/Birr?

Telecom services for the 231 exchange block in Portlaoise/Abbeyleix/Tullamore/Birr are primarily assigned to Local Network Carrier for Landline connections.