Telephone numbers in Norfolk Island Telephone numbers in Norfolk Island In Norfolk Island: Country code +672 was originally assigned to Portuguese Timor until annexed by Indonesia in 1975. It is also used for the Australian Antarctic Territory, whose numbers are in area code 1. The code was also used for Christmas Island and the Cocos Keeling Islands until October 1994 (encompassing area codes 2 and 4), when they were migrated to the +61 country code, under area code 091 (using exchange prefixes 62 for Christmas Island and 64 for the Cocos Islands). These numbers have since been migrated to 08 9162 and 08 9164 respectively.
Telephone numbers in Saint Helena and Tristan da Cunha Cunha shares the +290 code with St Helena, residents have access to the Foreign and Commonwealth Office Telecommunications Network, provided by Global Crossing. This uses a London 020 numbering range, meaning that numbers are accessed via the UK telephone numbering plan. Telephone numbers in Saint Helena and Tristan da Cunha Country Code: +290<br> International Call Prefix: 00<br> Trunk Prefix: 0 Ascension Island no longer shares the same country code with the rest of Saint Helena (i.e. Saint Helena and Tristan da Cunha). Format: +290 XXXX From 1 October 2013 all existing 4-digit telephone numbers on St Helena will be prefixed