Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4GJC callsign genealogy
Currently held by Cosgrove, Gregory J
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 W4GJC's current licensee, walking backwards.
- Cosgrove, Gregory JFLgranted 2021-09-15cancelled 2021-10-26
Successor callsigns
Callsigns held now by people who previously held W4GJC.
No current licensee on record previously held this callsign.