Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB7DO callsign genealogy
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 KB7DO's current licensee, walking backwards.
- GUEST, TREVOR NWAgranted 2009-10-30cancelled 2016-08-06
Successor callsigns
Callsigns held now by people who previously held KB7DO.
- MORRISON, VIRGIL EMOgranted 2018-11-10
All historical holders
Every license row we've seen with the callsign KB7DO, oldest first.
- GUEST, TREVOR N WA2016-08-06 active
- —— → cancelled 1998-10-23