Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7TWM callsign genealogy
Currently held by IRBY, T J
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 N7TWM's current licensee, walking backwards.
- Mills, TristanWAgranted 2019-04-23cancelled 2019-11-22
Successor callsigns
Callsigns held now by people who previously held N7TWM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N7TWM, oldest first.
- IRBY, T J OR2001-06-06 → cancelled 2013-09-04
- Mills, Tristan WA2019-11-22 active