Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AA1TW callsign genealogy
Currently held by QUISER, THOMAS 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 AA1TW's current licensee, walking backwards.
- Byung Tai, ChoiMAgranted 2022-10-21cancelled 2022-11-08
Successor callsigns
Callsigns held now by people who previously held AA1TW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign AA1TW, oldest first.
- QUISER, THOMAS C VT1998-06-16 → cancelled 2010-03-19
- Byung Tai, Choi MA2022-11-08 active