Area Code 57 – Portlaoise/Abbeyleix/Tullamore/Birr
The phone area code for Portlaoise/Abbeyleix/Tullamore/Birr is 57 (international format +35357). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 57
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Portlaoise/Abbeyleix/Tullamore/Birr
Geographic Coverage and Administrative Jurisdiction
The Irish area code 057 is a geographic National Destination Code (NDC) assigned to the Midlands region of the Republic of Ireland. It serves a broad catchment area that includes the county towns of Portlaoise (County Laois), Tullamore (County Offaly), and the surrounding urban and rural districts. The code also covers Abbeyleix, Birr, Mountmellick, Portarlington, Edenderry, and numerous smaller settlements within these counties. Administratively, the region falls under the jurisdiction of Laois County Council and Offaly County Council, with parts of the code's coverage extending into adjacent counties for exchanges that are economically or historically linked to the Midlands.
Dialing Formats and Caller Instructions
Within Ireland, calls to numbers in the 057 area require the national trunk prefix 0 followed by the area code and the subscriber's local number. The full national format is 057 XXX XXXX (where X represents the local digits, typically 7 digits in length). For example, a local call to a business in Portlaoise would be dialed as 057 123 4567. When calling from outside Ireland, the international access code (00 or +) is used, followed by the country code 353, the area code 57 (without the leading 0), and the subscriber number. Thus, an international caller would dial +353 57 123 4567. It is important to note that the leading '0' of the national trunk prefix is always dropped when dialing from abroad.
Local Dialing and Overlay Considerations
Within the 057 area, callers can often dial the local number directly without the area code, depending on the specific exchange and the service provider's configuration. However, for clarity and to avoid misdialing, it is recommended to use the full national format. As of the latest ITU-T E.164 guidelines, there is no overlay code for 057; the region retains a single geographic NDC. This means that all geographic numbers within the area share the same 057 prefix, and no additional digit is required for local calls. Subscriber numbers are seven digits long, and the total length of a national significant number (NSN) is nine digits (including the leading 0).
Practical Examples for Callers
- Local call (within 057 area): Dial 123 4567 (if supported) or 057 123 4567.
- National call (from Dublin, for example): Dial 057 123 4567.
- International call (from the UK or elsewhere): Dial +353 57 123 4567.
Businesses and residents in the 057 area benefit from a well-established telecommunications infrastructure, with both fixed-line and VoIP services available. When contacting services in this region, always verify the correct number format to ensure successful connection.