Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0FCM callsign genealogy
Currently held by Mayo, Francis C
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 K0FCM's current licensee, walking backwards.
- Mayo, Francis CCOgranted 2001-10-19cancelled 2004-11-02
Successor callsigns
Callsigns held now by people who previously held K0FCM.
- Mayo, Francis CAZgranted 2015-01-06