Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM6AH callsign genealogy
Currently held by Mah, Sherman 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 KM6AH's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KM6AH.
- Casson, HarveyCAgranted 2001-04-19cancelled 2013-05-01
All historical holders
Every license row we've seen with the callsign KM6AH, oldest first.
- CASSON, HARVEY CA1991-04-30 → cancelled 2000-06-02
- Mah, Sherman C CA2025-05-06 active