Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9DCH callsign genealogy
Currently held by Cook, Jeff 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 W9DCH's current licensee, walking backwards.
- Cook, Jeff MINgranted 2016-08-16cancelled 2016-09-09
Successor callsigns
Callsigns held now by people who previously held W9DCH.
No current licensee on record previously held this callsign.