Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9JTC callsign genealogy
Currently held by GRESSO, FREDERICK N
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 W9JTC's current licensee, walking backwards.
- COOK, JAMISON TILgranted 2014-10-30cancelled 2015-04-24
Successor callsigns
Callsigns held now by people who previously held W9JTC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9JTC, oldest first.
- GRESSO, FREDERICK N IN1994-07-15 → cancelled 2006-07-18
- COOK, JAMISON T IL2025-03-05 active