Coverage for network
Most people are on one network. Pick a provider to find its not-spots — sites with no mast for that network in range. "All" treats any network as coverage.
Min. observations / site
1+
72 of 72 sites — OpenCelliD infers each mast from phone reports, so sites seen only a few times may be phantoms. Raise this to keep only well-attested masts and watch thinly-evidenced coverage fall away.