Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4CGN callsign genealogy
Currently held by SHIMER, RICHARD O
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 K4CGN's current licensee, walking backwards.
- Nelson, Christopher GNCgranted 2009-08-20cancelled 2017-10-11
Successor callsigns
Callsigns held now by people who previously held K4CGN.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4CGN, oldest first.
- SHIMER, RICHARD O TN1988-04-12 → cancelled 2000-04-13
- Nelson, Christopher G FL2017-10-11 active