Country Code +973
December 2003, all Bahrain numbers were converted to 8 digits:
Previous six-digit fixed line numbers were prefixed by 17.
Previous seven-digit mobile numbers were prefixed by 3.
Parallel running of old and new number formats began on 1 December 2003 and will remain available until 1 June 2004,
when only the new eight-digit numbers will be valid. The old numbers will then be connected to a recorded announcement.
City Codes not required.
International City Dialing Codes