Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB5MBM callsign genealogy
Currently held by Manthey, Mark B
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 KB5MBM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KB5MBM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB5MBM, oldest first.
- STRINGER, JOHN E MS1990-03-27 → cancelled 2002-03-28
- Manthey, Mark B TX2006-09-08 → cancelled 2018-09-11