Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1CMA callsign genealogy
Currently held by AMBROSE, CHRISTOPHER M
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 K1CMA's current licensee, walking backwards.
- AMBROSE, CHRISTOPHER MRIgranted 2011-10-05cancelled 2013-11-09
Successor callsigns
Callsigns held now by people who previously held K1CMA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1CMA, oldest first.
- RICKER, DONALD A ME1996-06-18 → cancelled 2008-06-19
- AMBROSE, CHRISTOPHER M CT2025-08-05 active