Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC7JTJ callsign genealogy
Currently held by Sims, John
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 KC7JTJ's current licensee, walking backwards.
- Sims, John DAZgranted 2010-09-08cancelled 2010-09-28
Successor callsigns
Callsigns held now by people who previously held KC7JTJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC7JTJ, oldest first.
- SIMS, JOHN D AZ1995-03-24 → cancelled 2007-03-27
- Sims, John AZ2020-07-10 active