47 C.F.R. § 1.8001 FCC Registration Number (FRN).
Title 47 - Telecommunication
(a) The FCC Registration Number (FRN) is a 10-digit unique identifying number that is assigned to entities doing business with the Commission. (b) The FRN is obtained through the Commission Registration System (CORES) over the Internet at the CORES link at www.fcc.gov or by filing FCC Form 160.
Title 47: Telecommunication
PART 1—PRACTICE AND PROCEDURE
Subpart W—FCC Registration Number
§ 1.8001 FCC Registration Number (FRN).