Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ISA callsign genealogy
Currently held by SEHORN, THORNTON 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 K7ISA's current licensee, walking backwards.
- Howard, StevenWAgranted 2018-04-19cancelled 2018-07-21
Successor callsigns
Callsigns held now by people who previously held K7ISA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7ISA, oldest first.
- SEHORN, THORNTON E WA1992-06-09 → cancelled 2004-06-11
- SEHORN, ROBERT S WA2005-05-20 → cancelled 2017-05-23
- Howard, Steven WA2018-07-21 active