Area Code 422 – Dundalk
The phone area code for Dundalk is 422 (international format +353422). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 422
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Dundalk
Geographic Coverage and Administrative Context
The +353 422 area code is a geographic National Destination Code (NDC) assigned to the town of Dundalk and its surrounding areas in County Louth, Ireland. Dundalk is the county town of Louth, located in the northeastern part of the Republic of Ireland, near the border with Northern Ireland. The code serves a mix of urban and rural subscribers within the Dundalk urban district and parts of the wider County Louth area, including villages such as Blackrock, Haggardstown, and Jenkinstown. The area is part of the Irish PSTN (Public Switched Telephone Network) and is administered by ComReg, the national regulatory authority.
Dialing Formats and Caller Instructions
For local callers within Ireland, the number is dialed as 042 2XX XXXX (or 042 2XX XXX for older 7-digit local numbers, though the current standard is 8 digits after the NDC). The trunk prefix '0' is used for domestic calls. For international callers, the number must be dialed in the E.164 format: +353 42 2XX XXXX, omitting the leading '0'. For example, a local number 042 222 1234 would be dialed as +353 42 222 1234 from abroad.
When calling from a mobile phone in Ireland, it is common to dial the full national number (including the '0') even when in the same area, as mobile networks do not recognize local dialing. For calls from Northern Ireland (which uses the UK +44 country code), callers must use the international format +353 42 ... as well, due to differing national numbering plans.
Numbering Plan and Overlay Considerations
The 042 NDC is part of the Irish national numbering scheme, which underwent a major restructuring in 2001. Under the current plan, geographic area codes have a variable length (1-2 digits after the '0'), and subscriber numbers are 7 or 8 digits long. The 422 prefix specifically is a Central Office Code within the 042 exchange area. There are no overlay codes in this region; the 042 area is exclusively served by the 042 NDC. However, due to number portability, a subscriber may have a 042 number but be physically located elsewhere, and conversely, a subscriber in Dundalk may have a number from a different NDC if they ported their number.
Services and Usage
The 422 prefix is used for both fixed-line PSTN services and Voice over IP (VoIP) services that are assigned geographic numbers. Major telecom operators, including Eir, Vodafone Ireland, and various alternative carriers, may allocate numbers from this range. The area is served by modern fiber and copper networks, enabling high-speed broadband and digital voice services. For businesses, having a local Dundalk number can enhance local presence and customer trust. For callers, it is important to note that calls to 042 numbers are typically charged at standard national rates, depending on the caller's own tariff.