Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3AMF callsign genealogy
Currently held by DUFF, WILLIAM A
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 W3AMF's current licensee, walking backwards.
- PYLE III, ROBERT RDEgranted 2019-11-05cancelled 2019-11-23
Successor callsigns
Callsigns held now by people who previously held W3AMF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W3AMF, oldest first.
- DUFF, WILLIAM A PA2007-10-05 → cancelled 2015-08-09
- PYLE III, ROBERT R DE2019-11-23 active