Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4PHP callsign genealogy
Currently held by Harrell, Caleb B
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 K4PHP's current licensee, walking backwards.
- Harrell, Caleb BFLgranted 2021-11-22cancelled 2024-10-18
Successor callsigns
Callsigns held now by people who previously held K4PHP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4PHP, oldest first.
- FENNELL, THOMAS S SC1995-06-26 → cancelled 2007-06-27
- Harrell, Caleb B FL2024-10-18 active