Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5MMS callsign genealogy
Currently held by SHOWALTER, JOHNNIE
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 W5MMS's current licensee, walking backwards.
- SHOWALTER, JOHNNIETXgranted 2022-11-22cancelled 2023-02-22
Successor callsigns
Callsigns held now by people who previously held W5MMS.
No current licensee on record previously held this callsign.