Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1KM callsign genealogy
Currently held by ROSEN, RALPH 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 K1KM's current licensee, walking backwards.
- Serrano, Eugeni FiblaVTgranted 2013-07-08cancelled 2018-05-18
Successor callsigns
Callsigns held now by people who previously held K1KM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1KM, oldest first.
- ROSEN, RALPH J NH2006-08-16 → cancelled 2016-04-28
- Serrano, Eugeni Fibla VT2018-05-18 active