Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MMS callsign genealogy
Currently held by SHOEMAKER, KEITH B
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 W9MMS's current licensee, walking backwards.
- SWIRE, MILVERTON MILgranted 2007-10-02cancelled 2007-10-23
Successor callsigns
Callsigns held now by people who previously held W9MMS.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9MMS, oldest first.
- SHOEMAKER, KEITH B IL1989-07-25 → cancelled 2001-07-26
- SWIRE, MILVERTON M IL2018-07-31 active