Area Code 28 – Luxembourg City
The phone area code for Luxembourg City is 28 (international format +35228). Browse local exchange codes (NXX) and carrier assignments below.
📍 Geographic Location of Luxembourg City
Geographic Coverage and Administrative Jurisdiction
The +352 28 prefix is a geographic numbering resource allocated within the Luxembourg national numbering plan, specifically serving the capital city, Luxembourg City (Ville de Luxembourg), and its immediate urban agglomeration. As part of the Grand Duchy's PSTN and ISDN infrastructure, this code is assigned to fixed-line subscribers within the city's administrative boundaries, including the quarters of Gare, Merl, Belair, Limpertsberg, and the historic city center. The prefix is managed by the Institut Luxembourgeois de Régulation (ILR), the national regulatory authority, and is utilized by both residential and business customers.
Dialing Formats and Number Structure
In Luxembourg, geographic numbers are typically eight digits long, including the leading '2' of the area code. For the 28 prefix, the full national significant number (NSN) is eight digits: the prefix '28' followed by a six-digit subscriber number (e.g., 28 XX XX XX). When dialing domestically from another fixed or mobile line in Luxembourg, callers must dial the full eight-digit number without any trunk prefix, as Luxembourg uses an open dialing plan with no '0' prefix. For international callers, the E.164 format is +352 28 XX XX XX, where +352 is the country calling code for Luxembourg.
Caller Instructions and Overlay Considerations
Local callers within Luxembourg City can directly dial the eight-digit number. Foreign callers should replace the leading '0' (if present in some references) with the international access code (e.g., 00 from most European countries) followed by 352 and the eight-digit number. There are no overlay codes in Luxembourg; each geographic area maintains a single prefix, and number portability allows subscribers to retain their numbers when changing operators, though the geographic significance remains tied to the original assignment.
Usage and Modern Context
While traditional fixed-line services dominate this prefix, many numbers are also used for VoIP and ISDN lines, reflecting the convergence of telephony services. Businesses in Luxembourg City often use these numbers for customer service and administrative lines. The ILR ensures that geographic numbers are allocated efficiently, and as of recent years, the 28 prefix remains active for new installations, subject to availability.