Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4CHP callsign genealogy
Currently held by GUMBLE, ARTHUR 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 W4CHP's current licensee, walking backwards.
- DUFINE, MARK JNCgranted 2017-12-12cancelled 2018-03-06
Successor callsigns
Callsigns held now by people who previously held W4CHP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4CHP, oldest first.
- GUMBLE, ARTHUR R KY1998-03-31 → cancelled 2010-04-01
- DUFINE, MARK J NC2018-03-06 active