Diego-Garcia +246
Number Format
Area Code: none
Subscriber Number: 4 or 7 digits (see note below)
Trunk Prefix: n/a
International Prefix: 00
Subscriber Number 4 digits for all ranges, except there are 7 digits for the 3xx.xxxx subscriber number range (generally 370.xxxx, patterned after the corresponding US military DSN numbers).
Numbering range information
16 December 2009 - new numbering plan
Fixed/wireline numbers are of the form +246 37xxxxx while mobile/wireless numbers are in the new +246 38xxxxx range. International Premium Rate numbers associated with +246 were discontinued in 2005.
Source:
Cable & Wireless, including its announcement (31 December 2009, via ITU).
2007? - numbering plan consistently 7 digits
Cable & Wireless now indicates that Digeo-Garcia numbers have a consistent 7-digit format, with previous 4-digit numbers migrated at some unknown date.
Sources:
Cable & Wireless announcement (11 November 2007, via ITU)
Cable & Wireless Numbering Plan announcement (7 September 2007)
(News courtesy David Guy)
As of 2004 - former numbering plan
As of 2004, telephone numbers in Diego-Garcia were mostly 4-digit national numbers (that is, +246 xxxx) except for national numbers beginning with digit '3' (that is, +246 3xxxxxx).
Cable & Wireless announcement (1 April 2004, via ITU)
Other Information
See carrier Cable and Wireless Diego Garcia.