Area Code 57 – Esch-sur-Alzette/Schifflange
The phone area code for Esch-sur-Alzette/Schifflange is 57 (international format +35257). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Esch-sur-Alzette/Schifflange
Geographic Coverage and Administrative Jurisdiction
The +352 57 prefix is a geographic National Destination Code (NDC) assigned to the Esch-sur-Alzette and Schifflange area in the Grand Duchy of Luxembourg. Esch-sur-Alzette, the country's second-largest city, serves as the administrative and economic hub of the southern canton of Esch. Schifflange, a neighboring commune, is part of the same urban agglomeration. The code covers the central business districts, residential neighborhoods, and industrial zones within these communes.
Dialing Formats and Caller Instructions
Luxembourg employs a closed telephone numbering plan, meaning the national significant number (NSN) is always eight digits, regardless of whether the call is local or international. For callers within Luxembourg, dialing the eight-digit number directly is sufficient; the leading '57' is included. For example, to reach a subscriber in Esch-sur-Alzette, a local caller would dial 57 XX XX XX.
International callers must use the country code +352 followed by the eight-digit NSN. Thus, a call from abroad would be placed as +352 57 XX XX XX. There is no trunk prefix (such as '0') used in Luxembourg, so international callers should not add any leading zero after the country code.
Numbering Plan Considerations
Geographic codes in Luxembourg are allocated by the Institut Luxembourgeois de Régulation (ILR), the national regulatory authority. The 57 prefix is part of the geographic numbering plan, which is used for fixed-line PSTN and VoIP services. Subscribers may have migrated to VoIP, but the number retains its geographic significance for routing and emergency services. There are no overlay codes in this area; the 57 prefix is unique to the Esch-sur-Alzette/Schifflange region.
Practical Guidance for Callers
For local callers, no special access codes are required. For international callers, ensure you have the correct exit code for your country (e.g., 011 from the US, 00 from most European countries) before dialing +352 57 XX XX XX. When storing numbers in a phone's contact list, it is recommended to use the international format (+352 57 XX XX XX) to ensure proper dialing from any location.