Confidence: Medium · Source: FCC ULS · As of 2026-09-09
K4GLX callsign genealogy
Currently held by Blackwood, Christopher M
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 K4GLX's current licensee, walking backwards.
- Blackwood, Christopher MNCgranted 2021-02-22cancelled 2023-01-31
Successor callsigns
Callsigns held now by people who previously held K4GLX.
- Blackwood, Christopher MNCgranted 2024-11-22
All historical holders
Every license row we've seen with the callsign K4GLX, oldest first.
- BLUE III, DOUGALD L VA2010-01-28 → cancelled 2022-01-20
- Blackwood, Christopher M NC2023-01-31 → cancelled 2024-11-22