Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N7BTO callsign genealogy
Currently held by Krause, Karl S
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 N7BTO's current licensee, walking backwards.
- Krause, Karl SAZgranted 2016-02-09cancelled 2017-07-25
Successor callsigns
Callsigns held now by people who previously held N7BTO.
No current licensee on record previously held this callsign.