Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF7CEM callsign genealogy
Currently held by Chapman, Tyler G
The FCC publishes a previous_call_sign on
every amateur license — a self-link to the licensee's prior callsign.
Following those links produces the chain below.
Previous callsigns
Older callsigns held by KF7CEM's current licensee, walking backwards.
- Ryan, Michael AORgranted 2012-06-07cancelled 2015-06-23
Successor callsigns
Callsigns held now by people who previously held KF7CEM.
- Chapman, Tyler GAZgranted 2009-05-22cancelled 2021-05-25
All historical holders
Every license row we've seen with the callsign KF7CEM, oldest first.
- Chapman, Tyler G AZ2009-04-30 → cancelled 2009-05-22
- Ryan, Michael A OR2025-03-29 active