Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7CHK callsign genealogy
Currently held by Argo, Charles R
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 K7CHK's current licensee, walking backwards.
- Kirk, Christopher HWAgranted 2022-01-31cancelled 2022-02-23
Successor callsigns
Callsigns held now by people who previously held K7CHK.
- Argo, Charles RWAgranted 2007-09-29cancelled 2017-07-31
All historical holders
Every license row we've seen with the callsign K7CHK, oldest first.
- Argo, Charles R WA2007-03-16 → cancelled 2007-09-29
- Kirk, Christopher H WA2022-02-23 active