Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0BAK callsign genealogy
Currently held by GUDAHL, DAVID A
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 N0BAK's current licensee, walking backwards.
- Knudson, Brett AMNgranted 2012-05-23cancelled 2013-01-23
Successor callsigns
Callsigns held now by people who previously held N0BAK.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0BAK, oldest first.
- GUDAHL, DAVID A MN1990-08-07 → cancelled 2002-08-08
- Knudson, Brett A SD2022-11-22 active