Area Code 4297 – Castleblaney
The phone area code for Castleblaney is 4297 (international format +3534297). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 4297
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Castleblaney
Geographic Overview
The +353 4297 prefix is a geographic National Destination Code (NDC) assigned to the Castleblayney area in County Monaghan, Ireland. Castleblayney is a market town near the border with Northern Ireland, approximately 20 km south of Armagh. The code covers the town and its surrounding rural hinterland, including smaller settlements such as Oram, Ballyalbany, and Creeve. As part of the Irish telephone numbering plan, this prefix is used for fixed-line PSTN services, though some VoIP providers may also allocate numbers with this geographic code.
Dialing Formats
When calling a Castleblayney number from within Ireland, subscribers must dial the national trunk prefix 0 followed by the NDC and the subscriber number. For example, a local number might be formatted as 042 97 XXX XX, where '042' is the broader area code for County Monaghan, and '97' is the local exchange code. However, with the current E.164 structure, the full national number is 042 97X XXXX (typically 9 digits after the leading zero). International callers should dial +353 42 97X XXXX, omitting the leading zero. For instance, a call to a Castleblayney number would be dialed as +353 4297 XXXXX from abroad.
Geographic Allocation and Overlay
The 4297 prefix is part of the larger 042 numbering area, which covers County Monaghan and parts of County Louth. There is no overlay code in this region; the 042 area code is used exclusively for the entire geographic area. This means that local calls within the 042 region do not require an area code, but calls from outside the region must include the full national number.
Caller Instructions
For local callers (within the 042 area): dial only the 7-digit subscriber number (e.g., 97X XXXX). For national callers outside the 042 area: dial 042 followed by the subscriber number. For international callers: dial your country's exit code (e.g., 011 from the US), then 353, then 42, and then the subscriber number (without the leading zero). For example, from the UK, you would dial 00 353 42 97X XXXX.
Regulatory and Technical Notes
The prefix is regulated by ComReg, Ireland's communications regulator, and follows the ITU-T E.164 international numbering plan. Number portability allows subscribers to retain their geographic number when switching providers, even if they move to a VoIP service, but the number remains associated with the geographic area for routing purposes. Emergency services (112/999) are always accessible regardless of the prefix.