Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3MHG callsign genealogy
Currently held by GRIMM, MATTHEW H
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 W3MHG's current licensee, walking backwards.
- GRIMM, MATTHEW HTNgranted 2017-02-14cancelled 2017-03-17
Successor callsigns
Callsigns held now by people who previously held W3MHG.
- GRIMM, MATTHEW HTNgranted 2018-12-04