Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WB4JMS callsign genealogy
Currently held by SAEF, JOHN M
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 WB4JMS's current licensee, walking backwards.
- SAEF, JOHN MSCgranted 2018-06-21cancelled 2021-09-11
Successor callsigns
Callsigns held now by people who previously held WB4JMS.
No current licensee on record previously held this callsign.