Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB1NUL callsign genealogy
Currently held by Speth, Donald R
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 KB1NUL's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KB1NUL.
- Speth, Donald RMAgranted 2012-02-03cancelled 2012-05-07