Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC9SP callsign genealogy
Currently held by SAUER, EDWARD T
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 KC9SP's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held KC9SP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC9SP, oldest first.
- SAUER, EDWARD T IN2006-11-29 → cancelled 2019-02-26
- Peterson, Scott K MN2022-04-26 active