Area Code 2453 – Esch-sur-Alzette

Overview of Luxembourg Area Code 2453

Area code 2453 is a geographic National Destination Code (NDC) within the Luxembourgish public switched telephone network (PSTN), allocated to the southern region of the Grand Duchy. Specifically, it serves the city of Esch-sur-Alzette and its immediate suburbs, including Belval, Lallange, and Raemerich. Esch-sur-Alzette is the second-largest city in Luxembourg and the administrative capital of the canton of the same name. The code is part of the national numbering plan administered by the Institut Luxembourgeois de Régulation (ILR), following ITU-T E.164 recommendations.

Luxembourg employs a closed dialing plan for national calls: the full national significant number (NSN) is always 9 digits, beginning with the NDC (2453) followed by a 5-digit subscriber number. For example, a local number might be 2453 12345. When dialing from within Luxembourg, callers simply use the 9-digit number without any trunk prefix. From abroad, callers must use the international prefix (00 or +) followed by the country code 352 and the full NSN, omitting any leading zero (none exists). Thus, an international call to the same number would be dialed as +352 2453 12345.

Geographically, the 2453 area code covers the southernmost part of Luxembourg, bordering France. This region is part of the functional urban area of Luxembourg City but maintains its own distinct administrative and economic identity. The area is known for its industrial heritage, the University of Luxembourg's Belval campus, and the Rockhal concert venue. The code is used for fixed-line services, including PSTN and VoIP, provided by incumbent operator POST Luxembourg and alternative carriers. Subscriber numbers within 2453 are typically assigned to residential and business customers, with no overlay codes currently in effect.

For callers within Luxembourg, dialing a 2453 number is straightforward: just dial the 9-digit number. For international callers, remember to replace the leading '+' with the appropriate international access code (e.g., 011 from the US, 00 from most European countries). No additional area code is needed when calling from a mobile phone, as the full number is always required. If you are unsure whether a number is geographic, note that Luxembourg's mobile prefixes start with 621, 628, 661, 671, 691, etc., and are non-geographic. Always verify the number length and prefix to ensure correct routing.