Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1OOO callsign genealogy
Currently held by Frazier, Thomas F
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 W1OOO's current licensee, walking backwards.
- Frazier, Thomas FMNgranted 2016-11-21cancelled 2017-01-04
Successor callsigns
Callsigns held now by people who previously held W1OOO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1OOO, oldest first.
- Frazier, John W MN2013-10-25 → cancelled 2015-03-18
- Frazier, Thomas F MN2017-01-04 active