Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KM4UNO callsign genealogy
Currently held by Rivera, Hector L
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 KM4UNO's current licensee, walking backwards.
- Rivera, Hector LFLgranted 2015-04-22cancelled 2015-11-10
Successor callsigns
Callsigns held now by people who previously held KM4UNO.
- Rivera, Hector LFLgranted 2017-04-15