Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K4PHL callsign genealogy
Currently held by Estep, Phillip 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 K4PHL's current licensee, walking backwards.
- Estep, Phillip MTNgranted 2007-04-17cancelled 2007-07-24
Successor callsigns
Callsigns held now by people who previously held K4PHL.
No current licensee on record previously held this callsign.