Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7SJ callsign genealogy
Currently held by TANGEMAN, ZAK
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 K7SJ's current licensee, walking backwards.
- Stein, Roger CWAgranted 2007-06-04cancelled 2008-11-21
Successor callsigns
Callsigns held now by people who previously held K7SJ.
- TANGEMAN, ZAKCAgranted 2006-11-01cancelled 2018-11-27
All historical holders
Every license row we've seen with the callsign K7SJ, oldest first.
- TANGEMAN, ZAK CA1996-11-26 → cancelled 2006-11-01
- STEIN, ROGER C WA2018-09-05 active