Confidence: Medium · Source: FCC ULS · As of 2026-09-09
W1MIV callsign genealogy
Currently held by TAMM, WILLIAM R
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 W1MIV's current licensee, walking backwards.
- TAMM, WILLIAM RSDgranted 2008-05-06cancelled 2013-02-20
Successor callsigns
Callsigns held now by people who previously held W1MIV.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1MIV, oldest first.
- TAMM, CHARLES E NH1996-11-05 → cancelled 2008-11-06
- TAMM, WILLIAM R FL2013-02-20 → cancelled 2025-02-21