Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9WD callsign genealogy
Currently held by Mueller, Gregory C
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 W9WD's current licensee, walking backwards.
- Mueller, Gregory CWAgranted 2009-05-27cancelled 2009-08-07
Successor callsigns
Callsigns held now by people who previously held W9WD.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W9WD, oldest first.
- DU BROFF, WARREN NM1997-07-17 → cancelled 2009-07-18
- Mueller, Gregory C NM2019-05-13 active