Confidence: Medium · Source: FCC ULS · As of 2026-09-14
WA4THP callsign genealogy
Currently held by JOHNSON, FOREST M
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 WA4THP's current licensee, walking backwards.
- Tester, Edward GTNgranted 2002-03-25cancelled 2004-07-16
Successor callsigns
Callsigns held now by people who previously held WA4THP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign WA4THP, oldest first.
- JOHNSON, FOREST M KY1988-02-02 → cancelled 2000-02-03
- TESTER, EDWARD G TN2014-06-11 → cancelled 2026-07-17