Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9MUM callsign genealogy
Currently held by Williams, Lauren 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 K9MUM's current licensee, walking backwards.
- Williams, Lauren ASCgranted 2022-07-14cancelled 2022-08-02
Successor callsigns
Callsigns held now by people who previously held K9MUM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9MUM, oldest first.
- FISCHER, JACK E IL2008-02-12 → cancelled 2020-05-06
- Williams, Lauren A SC2022-08-02 active