Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB2GSW callsign genealogy
Currently held by COSTELLO, THOMAS F
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 KB2GSW's current licensee, walking backwards.
- Costello, Thomas FFLgranted 2018-05-23cancelled 2018-06-19
Successor callsigns
Callsigns held now by people who previously held KB2GSW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB2GSW, oldest first.
- COSTELLO, THOMAS F NY1988-12-27 → cancelled 2000-12-28
- Costello, Thomas FL2018-06-19 active