Public Access Files - Database Downloads | Federal Communications Commission

The Universal Licensing System (ULS) and Antenna System Registration (ASR) databases offer public access downloads for specific wireless radio services.
These downloads are available as zip files in both weekly transactions and in a six day sequence of transactions (daily).

NOTE: The 800 MHz Vacated Spectrum Files are not updated on a daily or weekly basis. Look for Public Notices regarding file availability updates.
* Some of the database files are very large.

Database Documentation for Public Access Files

ULS

Document

Introduction to ULS public access database files

(updated 11/12/2014)
Document

ULS Code Definitions

(updated 02/15/2024)
Document

Table Abbreviations and Names

(updated 02/15/2024)
Special Conditions Code (updated 3/29/2021)
Document

ULS Database Definitions SQL

(effective 02/15/2024)
Document

ULS Database Field Definitions

(effective 02/15/2024)
Document

auction_freq_tbl_04222008.txt

(updated 4/22/2008)
Document

Auction Frequency Table SQL

(added 2/19/2003)

ASR

Document

Introduction to ASR public access database files
Document

Database Field Definitions

(.xls) (updated 2/12/2019)
Document

asr_sql_table_definitions_3.txt

(updated 2/12/2019)
Document

Code definitions for table data elements

Other Databases

Ownership

Document

Database documentation
Document

Data File & Code Definitions

(updated 10/15/2007)
Document

SQL Data Definitions

(updated 10/15/2007)

800 MHz Vacated Spectrum

Document

Introduction to the Vacated Spectrum public access files
Document

Data File & Code Definitions

(updated 4/17/2014)
Document

SQL Data Definitions

(updated 4/17/2014)

Unlicensed Wireless Microphone Registration

Document

Introduction to the Unlicensed Wireless Microphone Registration public access files
Document

SQL for Data Definitions

(effective 6/2/2012)

For Questions and Support

Bureau/Office:

Wireless Telecommunications

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Updated:
Tuesday, May 16, 2023