Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7YUM callsign genealogy
Currently held by BARLEY, RALPH R
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 K7YUM's current licensee, walking backwards.
- KI7VZHcancelledYuma Amateur Radio Base AssociationAZgranted 2018-04-04cancelled 2018-04-24
Successor callsigns
Callsigns held now by people who previously held K7YUM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7YUM, oldest first.
- BARLEY, RALPH R AZ2005-06-24 → cancelled 2017-06-27
- Yuma Amateur Radio Base Association AZ2018-04-24 active