Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0TTP callsign genealogy
Currently held by GAMACHE, JOHN E
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 W0TTP's current licensee, walking backwards.
- Lewis, William SMOgranted 2025-07-08cancelled 2025-08-01
Successor callsigns
Callsigns held now by people who previously held W0TTP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0TTP, oldest first.
- GAMACHE, JOHN E MO2007-09-13 → cancelled 2019-09-24
- Lewis, William S MO2025-08-01 active