Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1OSK callsign genealogy
Currently held by Devine, Bruce C
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 K1OSK's current licensee, walking backwards.
- Hannon, Conner GCAgranted 2017-11-21cancelled 2019-12-27
Successor callsigns
Callsigns held now by people who previously held K1OSK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K1OSK, oldest first.
- Devine, Bruce C WA2007-10-27 → cancelled 2019-10-29
- HANNON, CONNER G CA2019-12-27 active