Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AB5TW callsign genealogy
Currently held by SWAYZE JR, WILLIAM T
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 AB5TW's current licensee, walking backwards.
- WHITFIELD, BRITON TTXgranted 2023-04-27cancelled 2024-12-27
Successor callsigns
Callsigns held now by people who previously held AB5TW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AB5TW, oldest first.
- SWAYZE JR, WILLIAM T TX2004-01-28 → cancelled 2016-04-20
- WHITFIELD, BRITON T TX2024-12-27 active