Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6SLO callsign genealogy
Currently held by Cullen, Clayton 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 K6SLO's current licensee, walking backwards.
- Cullen, Clayton JCAgranted 2011-06-30cancelled 2020-06-20
Successor callsigns
Callsigns held now by people who previously held K6SLO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K6SLO, oldest first.
- WHISLER, RICHARD G CA2007-09-22 → cancelled 2019-09-18
- Cullen, Clayton J CA2020-06-20 active