Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9SWL callsign genealogy
Currently held by SIEFERT JR, WALTER E
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 K9SWL's current licensee, walking backwards.
- LOVELAND, SUSANILgranted 2001-11-26cancelled 2010-08-13
Successor callsigns
Callsigns held now by people who previously held K9SWL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9SWL, oldest first.
- SIEFERT JR, WALTER E IN1995-01-13 → cancelled 2007-01-17
- LOVELAND, Susan W IL2020-06-16 active