Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4MUD callsign genealogy
Currently held by POTTER, JEFFREY D
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 K4MUD's current licensee, walking backwards.
- POTTER, JEFFREY DVAgranted 2002-03-19cancelled 2005-09-09
Successor callsigns
Callsigns held now by people who previously held K4MUD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4MUD, oldest first.
- DE HART, ROBERT N VA1987-08-25 → cancelled 1999-09-01
- POTTER, JEFFREY D VA2025-08-13 active