Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W7OTP callsign genealogy
Currently held by Sumner, Michael D
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 W7OTP's current licensee, walking backwards.
- Sumner, Michael DORgranted 2017-05-18cancelled 2017-12-08
Successor callsigns
Callsigns held now by people who previously held W7OTP.
No current licensee on record previously held this callsign.