Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KT1O callsign genealogy
Currently held by O BRION, THOMAS A
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 KT1O's current licensee, walking backwards.
- O BRION, THOMAS Acancelled 1999-01-13
Successor callsigns
Callsigns held now by people who previously held KT1O.
- WEDGE, STEPHEN ENCgranted 2026-08-11