Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K7TQJ callsign genealogy
Currently held by Erdmann Jr, Robert 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 K7TQJ's current licensee, walking backwards.
- Erdmann, Patti MAZgranted 2009-04-20cancelled 2010-02-12
Successor callsigns
Callsigns held now by people who previously held K7TQJ.
- Erdmann Jr, Robert ECOgranted 2008-01-23cancelled 2012-12-18
All historical holders
Every license row we've seen with the callsign K7TQJ, oldest first.
- Erdmann Jr, Robert E AZ2007-02-13 → cancelled 2008-01-23
- Erdmann, Patti M AZ2010-02-12 → cancelled 2022-02-15