Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1MMA callsign genealogy
Currently held by RIVAS, ALFONSO 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 K1MMA's current licensee, walking backwards.
- RIVAS, ALFONSO JTXgranted 2016-11-28cancelled 2016-12-30
Successor callsigns
Callsigns held now by people who previously held K1MMA.
No current licensee on record previously held this callsign.