Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W1HMM callsign genealogy
Currently held by Mueller III, Harry 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 W1HMM's current licensee, walking backwards.
- Mueller III, Harry MNHgranted 2016-06-22cancelled 2017-03-03
Successor callsigns
Callsigns held now by people who previously held W1HMM.
No current licensee on record previously held this callsign.