BA-BU China BV Taiwan (See Below For New Prefixes and Calls) BO1xx DM calls will only be assigned to radio amateurs, who actually held a DM call in the.
The International Telecommunication Union (ITU) allocates call sign prefixes for radio and They are sometimes used unofficially – such as amateur radio operators operating in a disputed territory or in a nation state that has no official prefix.
Ancillary prefixes or suffixes further identify the location and/or operating condition of an amateur operator.
PREFIX. COUNTRY. CQ-ZONE. ITU-ZONE. A2. Botswana. A3. Tonga Isl. A4. Oman & Muscat. A5. Bhutan. A6. United Arab.