Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4COB callsign genealogy
Currently held by Walker, John
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 K4COB's current licensee, walking backwards.
- Walker, JohnTNgranted 2019-11-21cancelled 2020-01-28
Successor callsigns
Callsigns held now by people who previously held K4COB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4COB, oldest first.
- COBB, MURRAY B VA2007-12-08 → cancelled 2020-01-08
- Walker, John TN2020-01-28 active