# SpectrumLookup

- **Website:** <https://spectrumlookup.com>
- **Primary alias:** `spectrumlookup.com`

## Description

SpectrumLookup is an independent, unofficial license research tool that helps users explore public records from the Federal Communications Commission’s Universal Licensing System (FCC ULS). Built for land mobile radio research, it searches license information across services including amateur, private and commercial land mobile, GMRS, paging, microwave, ship, and aircraft radio. Users can search by callsign, licensee, transmitter site, market, or frequency, with options for geographic and advanced queries.

The service supplements basic license searches with pending applications, renewal-window information, map links, and downloadable license copies in modern or classic formats. Additional tools include an advanced search with filters for radio service, status, location, frequency, and radius, plus a utility to convert MOTOTRBO DMR radio IDs to IP addresses and back. SpectrumLookup is built from FCC public bulk data, updated daily, and may differ from or lag behind official records; it is not affiliated with or endorsed by the FCC. The site also offers practical help and worked examples for radio research, drawing on its creator’s experience in land mobile radio system service and engineering.

## Industries

- 🗺 Reference Materials
- 🗺 Public Records and Directories _(under Reference Materials)_
- 🖥 Computers Electronics and Technology
- 🖥 Search Engines _(under Computers Electronics and Technology)_

## Colors

| Name | Hex | Theme |
| --- | --- | --- |
| Ship Cove | #6f8fbf | accent |
| Biscay | #1c3f73 | dark |
| Tacha | #d9c26a | light |

## Fonts

- Arial — asset _(system)_
- Arial — asset _(system)_
- Arial — asset _(system)_

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_Source: <https://brandfetch.com/spectrumlookup.com>_
_See [/llms.txt](/llms.txt) for a full list of agent-readable pages, and [/auth.md](/auth.md) for how agents authenticate._