The following is an index to radio assignment information extracted from the various licensing systems at the Commission and made available to the public via the Commissions Web site. Although all these licensing systems contain similar administrative and technical information about licensed and applied for facilities, the structure of the data bases varies according information required to license the radio facility or system.

Notice about data usage:

The material in these data and text files are provided as-is. The FCC disclaims all warranties with regard to the contents of these files, including their fitness. In no event shall the FCC be liable for any special, indirect, or consequential damages whatsoever resulting from loss or use, data or profits, whether in connection with the use or performance of the contents of these files, action of contract, negligence, or other action arising out of, or in connection with the use of the contents of these files.

Question regarding the content accuracy of these data bases should be directed to the bureau administering the licensing system.

IB: International Bureau Filing System (IBFS)

International Bureau Filing System (IBFS) - 47 CFR Parts 73/74, 23 and 25 (Earth Stations)

Data Files:
Updated: Daily -- midnight
Database Contact: IB Help Desk:


MB: Consolidated Database System (CDBS)

Consolidated Database System (CDBS) which includes the following broadcast services:
AM (47 CFR Part 73 Subpart A), FM (47 CFR Part 73 Subpart B) and TV(47 CFR Part 73 Subpart E)

Data Files:

Updated: Daily -- 5:00am
Database Contact: AM and FM: Jim Bradshaw,
TV: Hossein Hashemzadeh,

WTB: Universal Licensing System (ULS)


Universal Licensing System (ULS) which includes the following services and actions:-
Aircraft (47 CFR Part 87), Amatuer Radio (47 CFR Part 97), Antenna Structure Registration (47 CFR Part 17), Assignments and Tranfers, Cellular (47 CFR Part 22), General Mobile Radio Service (GMRS) (47 CFR Part 95, Subpart A), Land Mobile Services (47 CFR Parts 21, 22 and 90), Market Based Services, Microwave (47 CFR Parts 74 and 101), Paging (47 CFR Part 22), and Personal Communications Service (47 CFR Part 24)

Data Files:
[use licensed record set only]
Updated: Weekly -- Monday by 1130 except tower data by 1730
Database Contact: ULS Help Desk:


Wednesday, August 3, 2016