The '''facility ID number''', also called a '''FIN''' or '''facility identifier''', is a unique integer number<ref name="fcc-help_pa">{{cite web|url=https://licensing.fcc.gov/prod/cdbs/pubacc/prod/help_pa.htm#fac_id|title=CDBS Public Access Help|date=2010-07-09|publisher=[[Federal Communications Commission]]|location=Washington, D.C.|accessdate=2015-02-21}}</ref> of one to six digits,<ref>{{cite web|url=https://licensing.fcc.gov/cdbs/frnmanager/cdbs_frn.htm#fac_num|date=2011-03-09|title=CDBS FRN Manager User's Guide|publisher=[[Federal Communications Commission]]|location=Washington, D.C.|accessdate=2015-02-21}}</ref> assigned by the U.S. [[Federal Communications Commission]]'s (FCC) Media Bureau<ref name="fcc-help_pa"/> to each [[radio broadcasting|broadcast station]] in the FCC's Consolidated Database System (CDBS).
Because CDBS includes information about foreign stations which are notified to the U.S. under the terms of international [[frequency coordination]] agreements, FINs are also assigned to affected foreign stations. However, this has no legal significance, and the numbers are not used by the [[Regulation|regulatory]] authorities in those other countries.
