Telephone numbers in Monaco are eight digits in length, with fixed line numbers beginning with the digit 9 and mobile phone numbers with the digit 6.[1]
Overview
Until 21 June 1996, Monaco formed part of the French numbering plan, with fixed line numbers beginning with 93.[2] On that date the Principality adopted its own country code +377.[3] Consequently, all calls between France and Monaco had to be dialled in international format, including those to and from surrounding areas in France.[4]
From Monaco to France
00 33 x xx xx xx xx
From France to Monaco
00 377 xx xx xx xx
Mobile phone operators in at least two other jurisdictions, specifically Lonestar Cell in Liberia[5][6] and Vala in Kosovo,[7] have also used the +377 dialing code. Vala's use of +377 ceased on 3 February 2017, when Kosovo implemented the +383 code.[8]