Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4MTP callsign genealogy
Currently held by Estep, William L
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 W4MTP's current licensee, walking backwards.
- Estep, William LFLgranted 2017-05-10cancelled 2017-05-31
Successor callsigns
Callsigns held now by people who previously held W4MTP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W4MTP, oldest first.
- MILLS, RICHARD H GA2004-02-04 → cancelled 2016-04-27
- Estep, William L FL2017-05-31 active