Area Code 5644 – Castlecomer
The phone area code for Castlecomer is 5644 (international format +3535644). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 5644
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Castlecomer
Geographic Overview
The +353 5644 dialing code is a geographic National Destination Code (NDC) assigned to the town of Castlecomer and its surrounding areas in County Kilkenny, Ireland. This code is part of the national numbering plan administered by ComReg, the Commission for Communications Regulation. Castlecomer is a historic market town located in the north of County Kilkenny, approximately 16 kilometers from Kilkenny City. The geographic area covered by this code includes the town itself, along with nearby villages and townlands such as Moneenroe, Clogh, and The Rower, which fall within the local exchange area.
Dialing Formats
For callers within Ireland, the local dialing format is 056 44xxxxx (where xxxxx represents the local subscriber number). The leading '0' is the national trunk prefix, and '56' is the NDC for the broader Kilkenny area, with '44' identifying the Castlecomer exchange. When dialing from outside Ireland, the international format is +353 56 44xxxxx, omitting the leading '0'. For example, a local call to a Castlecomer number would be dialed as 056 4412345, while an international caller would dial +353 56 4412345.
Geographic Allocation and Overlays
This code is a geographic allocation, meaning it is tied to a specific physical location. It is used for fixed-line PSTN and VoIP services provided by operators such as Eir, Virgin Media, and various alternative carriers. There are no overlay codes currently in effect for this area; the 056 NDC serves the entire County Kilkenny region, with different exchange codes (like 44) distinguishing local areas. This means that local calls within the same NDC may still require the full NDC if dialed from a different exchange, depending on the caller's service provider and local dialing rules.
Caller Instructions
For local callers within Castlecomer, it is often possible to dial just the subscriber number for calls within the same exchange, but for clarity and to avoid misdialing, it is recommended to use the full national format (056 44xxxxx). For callers from other parts of Ireland, always dial the full national number including the leading '0'. For international callers, use the +353 country code, followed by the NDC without the leading '0', and then the subscriber number. This ensures proper routing through the international telephony network.
Regulatory and Technical Notes
Under the ITU-T E.164 recommendation, the maximum length of an international telephone number is 15 digits. Irish geographic numbers typically consist of 7 to 8 digits after the country code, and this code follows that standard. Number portability allows subscribers to retain their number when changing providers, but the geographic significance of the code remains. As with all geographic codes, the cost of calls to this number depends on the caller's tariff and the destination type (fixed-line).