Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7ZXO callsign genealogy
Currently held by PUMPHREY, SHANNON
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 K7ZXO's current licensee, walking backwards.
- PUMPHREY, SHANNONMTgranted 2021-02-22cancelled 2021-04-02
Successor callsigns
Callsigns held now by people who previously held K7ZXO.
- Shirley, ChristopherWAgranted 2017-02-10
All historical holders
Every license row we've seen with the callsign K7ZXO, oldest first.
- JEAN, WILLIAM W AZ1999-06-04 → cancelled 2011-06-07
- Shirley, Christopher WA2016-12-23 → cancelled 2017-02-10
- PUMPHREY, SHANNON MS2021-04-02 active