 However, five-digit postcodes were introduced in northern Cyprus in 2013, in a similar format to those of Turkey, with the first two digits being 99, and the last three indicating the locality.The two British Sovereign Base Areas (or SBAs) of Cyprus are not part of the Republic of Cyprus, although the Cypriot villages within these areas use the Cyprus post code system.British military organisations and personnel use British Forces Post Office numbers, BFPO 57 for Akrotiri and BFPO 58 for Dhekelia.