Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4TPH callsign genealogy
Currently held by Harp Jr, Thomas P
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 K4TPH's current licensee, walking backwards.
- Harp Jr, Thomas PALgranted 2018-02-10cancelled 2021-10-01
Successor callsigns
Callsigns held now by people who previously held K4TPH.
No current licensee on record previously held this callsign.