Telephone numbers in Luxembourg employ a closed dialling system, whereby all numbers are dialed in the same format whether from within Luxembourg or from abroad. There is no trunk prefix like "0".

The incumbent operator employed an open numbering plan with numbers of varying lengths, where a two-digit area identifier is followed by one to four digits, all six digits forming the subscriber number. This was changed by the introduction of a new numbering plan in 1999.Cadre légal Regulations concerning the Numbering Plan (in French) Telephone numbers introduced since May 2000 by the incumbent operator begin with "2" (generally 26, 24 and recently 27) followed by two to six digits. The area identifier is still present and generally following the 26, 27 or 24, however numbers can be ported to any other area.

79 xxxx (example number in Consdorf) +352 79 xxxx (when dialed from outside Luxembourg) 2679 xxxx (example number in Consdorf for new lines since May 2000) +352 2679 xxxx (when dialed from outside Luxembourg) 4 xxx xx (example number in Luxembourg City) +352 4 xxx xx (when dialed from outside Luxembourg)

In Luxembourg, PBX extensions were generally appended to the main number, hence the need for an open numbering plan. As more PBXs were installed in offices in Luxembourg compared to areas with almost exclusively residential customers, this led to the impression that numbers in Luxembourg City would be longer than six digits. The regulator therefore decided that new phone numbers must be eight digits long including the extension. In order to fulfill this requirement, operators have to shorten a customer's phone number to 3-6 digits, to allow 2-5 digit extensions.

Areas

LIST OF INITIAL DIGITS Initial Digits Place name 20 21 22 Luxembourg City 23 Mondorf-les-Bains/Bascharage/Noerdange/Remich 24 20 24 21 Weicherdange 24 22 Luxembourg City 24 23 Mondorf-les-Bains/Bascharage/Noerdange/Remich 24 24 24 25 Luxembourg 24 26 24 27 24 28 Luxembourg City 24 29 Luxembourg/Kockelscheuer 24 30 Capellen/Kehlen 24 31 Bertrange/Mamer/Munsbach/Strassen 24 32 Lintgen/Mersch/Steinfort 24 33 Walferdange 24 34 Rameldange/Senningerberg 24 35 Sandweiler/Moutfort/Roodt-Sur-Syre 24 36 Hesperange/Kockelscheuer/Roeser 24 37 Leudelange/Ehlange/Mondercange 24 38 24 39 Windhof/Steinfort 24 40 Howald 24 41 24 42 Plateau de Kirchberg 24 43 Findel/Kirchberg 24 44 24 45 Diedrich 24 46 24 47 Lintgen 24 48 Contern/Foetz 24 49 Howald 24 50 Bascharage/Petange/Rodange 24 51 Dudelange/Bettembourg/Livange 24 52 Dudelange 24 53 Esch-Sur-Alzette 24 54 Esch-Sur-Alzette 24 55 Esch-Sur-Alzette/Mondercange 24 56 Rumelange 24 57 Esch-sur-Alzette/Schifflange 24 58 Soleuvre/Differdange 24 59 Soleuvre 24 67 Dudelange 24 70 24 71 Betzdorf 24 72 Echternach 24 73 Rosport 24 74 Wasserbillig 24 75 Grevenmacher-Sur-Moselle 24 76 Wormeldange 24 77 24 78 Junglinster 24 79 Berdorf/Consdorf 24 80 Diekirch 24 81 Ettelbruck/Reckange-Sur-Mess 24 82 24 83 Vianden 24 84 24 85 Bissen/Roost 24 86 24 87 Larochette 24 88 Mertzig/Wahl 24 89 24 90 24 91 24 92 Clervaux/Fischbach/Hosingen 24 93 24 94 24 95 Wiltz 24 96 24 97 Huldange 24 98 24 99 Troisvierges 25 Luxembourg 26 20 26 21 Weicherdange 26 22 Luxembourg City 26 23 Mondorf-les-Bains/Bascharage/Noerdange/Remich 26 24 26 25 Luxembourg 26 26 26 27 Belair, Luxembourg City 26 28 Luxembourg City 26 29 Luxembourg/Kockelscheuer 26 30 Capellen/Kehlen 26 31 Bertrange/Mamer/Munsbach/Strassen 26 32 Lintgen/Mersch/Steinfort 26 33 Walferdange 26 34 Rameldange/Senningerberg 26 35 Sandweiler/Moutfort/Roodt-Sur-Syre 26 36 Hesperange/Kockelscheuer/Roeser 26 37 Leudelange/Ehlange/Mondercange 26 38 26 39 Windhof/Steinfort 26 40 Howald 26 41 26 42 Plateau de Kirchberg 26 43 Findel/Kirchberg 26 44 26 45 Uerschterhaff 26 46 26 47 Lintgen 26 48 Contern/Foetz 26 49 Howald 26 50 Bascharage/Petange/Rodange 26 51 Dudelange/Bettembourg/Livange 26 52 Dudelange 26 53 Esch-Sur-Alzette 26 54 Esch-Sur-Alzette 26 55 Esch-Sur-Alzette/Mondercange 26 56 Rumelange 26 57 Esch-sur-Alzette/Schifflange 26 58 Soleuvre/Differdange 26 59 Soleuvre 26 67 Dudelange 26 70 26 71 Betzdorf 26 72 Echternach 26 73 Rosport 26 74 Wasserbillig 26 75 Grevenmacher-Sur-Moselle 26 76 Wormeldange 26 77 26 78 Junglinster 26 79 Berdorf/Consdorf 26 80 Diekirch 26 81 Ettelbruck/Reckange-Sur-Mess 26 82 26 83 Vianden 26 84 Han/Lesse 26 85 Bissen/Roost 26 86 26 87 Larochette 26 88 Mertzig/Wahl 26 89 26 90 26 91 26 92 Clervaux/Fischbach/Hosingen 26 93 26 94 26 95 Wiltz 26 96 26 97 Huldange 26 98 26 99 Troisvierges 27 20 27 21 Weicherdange 27 22 Luxembourg City 27 23 Mondorf-les-Bains/Bascharage/Noerdange/Remich 27 24 27 25 Luxembourg 27 26 27 27 27 28 Luxembourg City 27 29 Luxembourg/Kockelscheuer 27 30 Capellen/Kehlen 27 31 Bertrange/Mamer/Munsbach/Strassen 27 32 Lintgen/Mersch/Steinfort 27 33 Walferdange 27 34 Rameldange/Senningerberg 27 35 Sandweiler/Moutfort/Roodt-Sur-Syre 27 36 Hesperange/Kockelscheuer/Roeser 27 37 Leudelange/Ehlange/Mondercange 27 38 27 39 Windhof/Steinfort 27 40 Howald 27 41 27 42 Plateau de Kirchberg 27 43 Findel/Kirchberg 27 44 27 45 Diedrich 27 46 27 47 Lintgen 27 48 Contern/Foetz 27 49 Howald 27 50 Bascharage/Petange/Rodange 27 51 Dudelange/Bettembourg/Livange 27 52 Dudelange 27 53 Esch-Sur-Alzette 27 54 Esch-Sur-Alzette 27 55 Esch-Sur-Alzette/Mondercange 27 56 Rumelange 27 57 Esch-sur-Alzette/Schifflange 27 58 Soleuvre/Differdange 27 59 Soleuvre 27 67 Dudelange 27 70 27 71 Betzdorf 27 72 Echternach 27 73 Rosport 27 74 Wasserbillig 27 75 Grevenmacher-Sur-Moselle 27 76 Wormeldange 27 77 27 78 Junglinster 27 79 Berdorf/Consdorf 27 80 Diekirch 27 81 Ettelbruck/Reckange-Sur-Mess 27 82 27 83 Vianden 27 84 Han/Lesse 27 85 Bissen/Roost 27 86 27 87 Larochette 27 88 Mertzig/Wahl 27 89 27 90 27 91 27 92 Clervaux/Fischbach/Hosingen 27 93 27 94 27 95 Wiltz 27 96 27 97 Huldange 27 98 27 99 Troisvierges 28 Luxembourg City 29 Luxembourg/Kockelscheuer 30 Capellen/Kehlen 31 Bertrange/Mamer/Munsbach/Strassen 32 Lintgen/Mersch/Steinfort 33 Walferdange/Steinsel/Heisdorf 34 Rameldange/Senningerberg 35 Sandweiler/Moutfort/Roodt-Sur-Syre 36 Hesperange/Kockelscheuer/Roeser 37 Leudelange/Ehlange/Mondercange 38 39 Windhof/Steinfort 4 Luxembourg City 40 Howald 41 42 Plateau de Kirchberg 43 Findel/Kirchberg 44 45 Diedrich 46 47 Lintgen 48 Contern/Foetz 49 Howald 50 Bascharage/Petange/Rodange 51 Dudelange/Bettembourg/Livange 52 Dudelange 53 Esch-Sur-Alzette 54 Esch-Sur-Alzette 55 Esch-Sur-Alzette/Mondercange 56 Rumelange 57 Esch-sur-Alzette/Schifflange 58 Soleuvre/Differdange 59 Soleuvre 67 Dudelange 70 71 Betzdorf 72 Echternach 73 Rosport 74 Wasserbillig 75 Grevenmacher-Sur-Moselle 76 Wormeldange 77 78 Junglinster 79 Berdorf/Consdorf 80 Diekirch 81 Ettelbruck/Reckange-Sur-Mess 82 83 Vianden 84 Han/Lesse 85 Bissen/Roost 86 87 Larochette 88 Mertzig/Wahl 89 Esch-sur-Sûre 90 91 92 Clervaux/Fischbach/Hosingen 93 94 95 Wiltz 96 97 Huldange 98 99 Troisvierges

Mobile Numbers

Mobile telephone numbers always carry a three-digit network code, in the format "6x1", which is followed by six digits. The leading "6" of these numbers is not omitted when dialing from abroad.

6x1 xxx xxx (within Luxembourg) +352 6x1 xxx xxx (outside Luxembourg)

These codes were introduced on 1 September 2006, replacing codes in the format "0x1". Existing numbers were converted to the new format.

Starting January 2019, the voice mail number is generic, reachable only from the subscriber itself (or as result of the call forwarding when busy/non reachable ...): 352691000700

Until January 2019, the voice mail number followed the below rule: Each mobile number has an equivalent voicemail number, the network code is in the format "6x8" (note: format does NOT apply to Join Experience).

The mobile network codes are:

621: POST Telecom (formerly LuxGSM) 651: Eltrona (mvno on POST Telecom), starting 2017 661: Orange 671: Join Experience 691: Proximus Luxembourg (Tango)

In June 2009, a new numbering range for mobile machine-to-machine communication was introduced. The numbers have a fixed length of 12 digits and start with "60", the only assigned network code from this range is:

6021: POST Telecom (formerly LuxGSM)

References