Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KF0MJB callsign genealogy
Currently held by Birmingham, Michael J
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 KF0MJB's current licensee, walking backwards.
- Birmingham, Michael JCOgranted 2020-11-16cancelled 2020-12-11
Successor callsigns
Callsigns held now by people who previously held KF0MJB.
No current licensee on record previously held this callsign.