Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5WMP callsign genealogy
Currently held by SUMMERS, WILLIAM 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 W5WMP's current licensee, walking backwards.
- Pontillo, William MTXgranted 2021-02-09cancelled 2021-03-16
Successor callsigns
Callsigns held now by people who previously held W5WMP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W5WMP, oldest first.
- SUMMERS, WILLIAM P TX2008-08-12 → cancelled 2020-11-11
- Pontillo, William M TX2021-03-16 active