Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ASL callsign genealogy
Currently held by PARRILL, THOMAS W
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 K7ASL's current licensee, walking backwards.
- ARMSTRONG, STEVEN LIDgranted 2005-02-25cancelled 2006-03-14
Successor callsigns
Callsigns held now by people who previously held K7ASL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7ASL, oldest first.
- PARRILL, THOMAS W WA1988-11-01 → cancelled 2000-11-02
- Armstrong, Steven L ID2015-12-16 active