Area Code 478 – Monaghan
The phone area code for Monaghan is 478 (international format +353478). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 478
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Monaghan
Geographic Coverage and Administrative Jurisdiction
The +353 478 prefix is a geographic National Destination Code (NDC) assigned to the town of Monaghan, which serves as the county town of County Monaghan in the Republic of Ireland. This code covers the urban center and its immediate hinterland, including surrounding townlands and villages within the county. Monaghan is situated in the Border Region, sharing a land border with Northern Ireland, and the code is administered under the national numbering plan overseen by ComReg (Commission for Communications Regulation).
Dialing Formats and Caller Instructions
For callers within Ireland, the local dialing format is 047 8XXXXX (where X denotes subscriber digits), omitting the trunk prefix '0' when dialing from abroad. Internationally, the number is dialed as +353 47 8XXXXX. It is important to note that the '0' trunk prefix is not included when dialing from outside Ireland. For example, a local Monaghan number might be 047 81234, while the same number dialed from the United States would be 011 353 47 81234 or +353 47 81234 on mobile devices.
Subscriber numbers within this NDC are typically seven digits in length, including the leading '8' that follows the area code. This structure is consistent with the national format for geographic numbers, which are always seven digits after the NDC. Callers should be aware that the full national number (including the leading '0') is required for domestic calls, while the international format omits the '0'.
Overlay and Numbering Considerations
As of the latest ComReg updates, the Monaghan area does not have an overlay code; the 047 NDC remains the sole geographic code for the region. This means that local calls within Monaghan are dialed using the full seven-digit subscriber number without the area code, provided the caller is within the same charging group. However, for calls from other parts of Ireland, the full national number (including the '0' and NDC) must be used. There are no plans for an overlay in the near future, but subscribers should always verify the correct dialing procedure with their service provider if they experience issues.
Service and Usage Notes
The 478 prefix is exclusively used for fixed-line PSTN and VoIP services that are geographically tied to Monaghan. It is not used for mobile services, which are allocated non-geographic codes such as 083, 085, 086, 087, and 089. Businesses and residents in Monaghan may use this code for both voice and fax services. When calling from abroad, the international access code (e.g., 00 in Europe, 011 in North America) must be used before the country code. For callers within Ireland, the '0' trunk prefix is required for all calls outside the local area. Always confirm the correct number with the recipient, as number portability may allow a geographic number to be routed to a mobile or VoIP service, but the dialing format remains unchanged.