Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4TJM callsign genealogy
Currently held by Polk Ham Club
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 W4TJM's current licensee, walking backwards.
- KJ4ACNcancelledWEST CENTRAL FLORIDA D STAR CLUBFLgranted 2007-10-25cancelled 2017-08-15
Successor callsigns
Callsigns held now by people who previously held W4TJM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4TJM, oldest first.
- Polk Ham Club FL2004-04-29 → cancelled 2016-05-11
- Polk Ham Club FL2017-08-15 active