Call-sign allocation plan
In telecommunication, call-sign allocation plan is the table of allocation of international call sign series contained in the current edition of the International Telecommunication Union Radio Regulations.
Note: In the table of allocation, the first two characters of each call sign identify the nationality of the station. In certain instances where the complete alphabetical block is allocated to a single nation, the first letter is sufficient for national identity. Individual assignments are made by appropriate national assignment authorities from the national allocation.
