Area Code 427 – Dundalk
The phone area code for Dundalk is 427 (international format +353427). Browse local exchange codes (NXX) and carrier assignments below.
📞 Exchange Codes (NXX) for Area Code 427
Select a central office code to view local carrier data and detailed information
📍 Geographic Location of Dundalk
Geographic Overview
The +353 427 area code serves Dundalk, the county town of County Louth in the Republic of Ireland. Located in the northeastern part of the country, near the border with Northern Ireland, Dundalk is a significant commercial and administrative hub. The 427 code specifically covers the town and its immediate environs, including the surrounding electoral divisions and suburban areas. It is one of several geographic codes allocated to County Louth, with other codes such as 42 for the wider north-eastern region, but 427 is dedicated to Dundalk's local exchange area.
Dialing Formats
For callers within Ireland, the national dialing format is 0427 XXX XXX (where X represents the subscriber number). The leading '0' is the trunk prefix used for domestic calls. For international callers, the format is +353 427 XXX XXX, omitting the trunk prefix. The full international number includes the country code +353, the area code 427, and the subscriber number, which together form a 9-digit national significant number (NSN) when the leading '0' is excluded.
Calling Instructions
Local callers: When dialing within the Dundalk area, it is possible to use the shorter local format by omitting the area code, depending on the specific local exchange configuration. However, for clarity and consistency, it is recommended to always include the area code, especially as Ireland has implemented full number portability and some overlay considerations may apply in the future.
International callers: To reach a number in Dundalk from abroad, dial your country's international access code (e.g., 011 from the US, 00 from most European countries), followed by Ireland's country code 353, then the area code 427 (without the leading zero), and finally the subscriber's 7-digit number. For example, a typical number might be +353 427 123 4567.
Numbering and Regulatory Notes
Geographic area codes in Ireland are allocated by the Commission for Communications Regulation (ComReg) under the National Numbering Scheme. The 427 code is part of the E.164 international numbering plan, ensuring global interoperability. Subscriber numbers within this area are typically 7 digits long, but the total length of a national significant number is always 9 digits (including the area code but excluding the trunk prefix). This consistency facilitates routing and billing.
As with all Irish geographic numbers, calls to +353 427 numbers are tariffed as national calls when dialed from within Ireland, unless included in a bundled package. From abroad, international rates apply. It is important to note that geographic numbers are not tied to a specific physical location for VoIP services, but they are generally associated with the Dundalk exchange area.