Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4COJ callsign genealogy
Currently held by Estep, James P
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 W4COJ's current licensee, walking backwards.
- Estep, James PFLgranted 2000-02-12cancelled 2003-05-30
Successor callsigns
Callsigns held now by people who previously held W4COJ.
No current licensee on record previously held this callsign.