The facility ID number, also called a FIN or facility identifier, is a unique integer number[1] of one to six digits,[2] assigned by the U.S. Federal Communications Commission (FCC) Media Bureau[1] to each broadcast station in the FCC Consolidated Database System (CDBS) and Licensing and Management System (LMS) databases, among others.
Current FCC practice is to assign facility ID numbers sequentially, but this is not an official requirement, so third-party users must not rely on it.
Unlike call signs, however, the FIN associated with a particular station never changes; thus, the FCC staff and interested parties can be certain to which station an application pertains, even if it has changed its call sign since the application was originally filed.
In several cases, television stations have swapped facilities, and thus their FIN numbers, as what occurred in 1995 in Miami, when NBC-owned station WTVJ swapped channels with CBS's WCIX-TV (after the swap, WFOR-TV); NBC thus took the FIN and transmitter formerly associated with WCIX-TV, while WFOR-TV continues to operate under the FIN originally established for WTVJ.
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