Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1ABA callsign genealogy
Currently held by ARMSTRONG, THOMAS E
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 N1ABA's current licensee, walking backwards.
- ARMSTRONG, THOMAS ECTgranted 2020-11-12cancelled 2020-12-01
Successor callsigns
Callsigns held now by people who previously held N1ABA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1ABA, oldest first.
- WOLF, ROBERT J NH2008-02-07 → cancelled 2020-04-23
- ARMSTRONG, THOMAS E CT2020-12-01 active