SpectrumLookup is a license research tool for land mobile radio, built on the FCC's public ULS data and updated daily. It goes beyond the FCC's search with pending applications on every search, renewal windows, Google Maps links and Classic or Modern PDF copies. Independent and not affiliated with the FCC.
SpectrumLookup searches FCC ULS public license records for land mobile work. Start with a call sign, or open Licensee or Site / Market / Frequency for a name, a county, or a frequency range.
| Query | Brief Query Description |
|---|---|
| Quick Searches | |
| Callsign | Quick license search by Callsign. |
| Detailed Searches | |
| Licensee | Detailed search based on Licensee data. This search only operates on administrative data such as Licensee Name, Address State, FRN. Results are presented with only administrative information. |
| Site / Market / Frequency | Searches on Site and Frequency data such as Location, State/County, Frequency. This search includes ULS Market queries if a latitude / longitude location specification is not entered. |
This system searches the following database: Universal Licensing System (licenses from the FCC's public ULS weekly and daily files; see About the data for the services loaded).
| Other SpectrumLookup Searches | |
|---|---|
| ULS License Search | ULS-style quick search by Call Sign, Licensee Name or FRN. |
| Advanced / Geographic | ULS-style advanced search: radio service, status, state/county/city, lat/long radius, frequency, paging and sorting. |
| Modern view | All filters on one form, with frequency, band and radius search. |
| Tools | |
| DMR Radio ID ↔ IP | Convert a MOTOTRBO CAI Radio ID to a DMR IP address and back (default CAI 12). |
| Help | |
| How to use | Worked examples: a county and frequency, a call sign, co-channel users near a site, and how to read a license. |
Callsign – enter a call sign; with Wildcard Search checked, all call signs beginning with the text are listed (you may also use * anywhere). All statuses are listed unless you choose another Limit Results to option. Licensee – Licensee Name (with Wildcard Search: all words anywhere in the name; without: name begins with the text), licensee address State and Zip Code, FRN, and grant / expiration date ranges. Site / Market / Frequency – transmitter-site State and County, frequency Begin/End (Begin alone matches that frequency), and a Point, Point Radius or Box location in degrees / minutes / seconds. Results link to the license's detail page. Worked examples are in How to use SpectrumLookup.
DISCLAIMERSpectrumLookup is an independent, unofficial license research tool built on FCC ULS public data. It is not affiliated with, endorsed by, or operated by the Federal Communications Commission, and this page is not an FCC system. Data may lag or differ from the official record; for official purposes use the FCC's own systems. Provided as is, without warranty.
I'm Ty Calta, KF4DLA, Director of Service and Engineering at one of the largest Motorola dealers in the US. I'm a former Motorolan who traveled the world fixing broken radio systems, and I've worked in land mobile radio for more than 28 years. I specialize in MOTOTRBO, with many years on Capacity Max, Linked Capacity Plus/CPMS, Capacity Plus/CPSS, IP Site Connect/IPSC, and conventional MOTOTRBO. I enjoy troubleshooting radio systems and coverage problems. You can reach me at radio@spectrumlookup.com or on LinkedIn.