Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K0UMM callsign genealogy
Currently held by Ryder, Travis 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 K0UMM's current licensee, walking backwards.
- Ryder, Travis JMNgranted 2012-04-20cancelled 2015-09-29
Successor callsigns
Callsigns held now by people who previously held K0UMM.
No current licensee on record previously held this callsign.