Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0BU callsign genealogy
Currently held by Frantz Jr, Ivan 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 W0BU's current licensee, walking backwards.
- KC0DRZcancelledTWIN CITIES REPEATER CLUBMNgranted 2009-01-21cancelled 2009-03-31
Successor callsigns
Callsigns held now by people who previously held W0BU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0BU, oldest first.
- Frantz Jr, Ivan D MN2004-11-17 → cancelled 2009-01-23
- TWIN CITIES REPEATER CLUB MN2019-02-08 active