Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7IMZ callsign genealogy
Currently held by ST JOHN, WILLIAM L
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 W7IMZ's current licensee, walking backwards.
- McAllister, Robert IORgranted 2017-02-16cancelled 2017-03-07
Successor callsigns
Callsigns held now by people who previously held W7IMZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7IMZ, oldest first.
- ST JOHN, WILLIAM L WA1989-07-18 → cancelled 2001-07-19
- McAllister, Robert I OR2017-03-07 active