RayHunter: Detect Rogue Cell Towers #shorts

Our Take

Credit to STS Technologies LLC for putting a spotlight on RayHunter, the Electronic Frontier Foundation's open-source project that turns a cheap mobile hotspot into a rogue cell tower detector. IMSI catchers and Stingrays have been quietly scooping up phone metadata near protests, courthouses, and city blocks for over a decade, often without warrants or public disclosure. A tool that lets ordinary people check whether their phone is talking to a legitimate tower or a law enforcement decoy is a genuine win for transparency, and the fact that it's open-source means researchers can verify it instead of just trusting a vendor's word.

We cover ALPRs here, not cell-site simulators, but the throughline is the same: law enforcement and private companies are building invisible dragnets around everyday movement, and the public is left to reverse-engineer how those systems work. Flock Safety cameras log plates, location, and travel patterns the same way a Stingray logs phone identifiers nearby, both feeding data into networks that rarely get independent audits. Tools like RayHunter matter because they shift some power back to the public, turning surveillance detection into something you can actually hold in your hand.

If you want to see where that plate-reading infrastructure already sits in your town, check our camera map, and if you're ready to push back on it locally, our take-action guide has concrete next steps.