Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ABB callsign genealogy
Currently held by GUTHRIE, ROBERT D
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 K7ABB's current licensee, walking backwards.
- Larson, Charles RAZgranted 2016-05-02cancelled 2017-02-10
Successor callsigns
Callsigns held now by people who previously held K7ABB.
- Alexander, Bryce RAZgranted 2011-09-20cancelled 2014-06-14
All historical holders
Every license row we've seen with the callsign K7ABB, oldest first.
- GUTHRIE, ROBERT D NC1996-11-14 → cancelled 2008-09-18
- Alexander, Bryce R AZ2011-09-20 → cancelled 2013-11-26
- Larson, Charles R AZ2017-02-10 active