Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4PMT callsign genealogy
Currently held by HEATON SR, JOHN W
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 W4PMT's current licensee, walking backwards.
- TRAMMELL JR, PARK MFLgranted 2005-09-20cancelled 2006-01-07
Successor callsigns
Callsigns held now by people who previously held W4PMT.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4PMT, oldest first.
- HEATON SR, JOHN W SC1988-02-02 → cancelled 2000-02-03
- TRAMMELL JR, PARK M FL2015-10-10 active