Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W3DIF callsign genealogy
Currently held by Derr, Michael E
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 W3DIF's current licensee, walking backwards.
- Derr, Michael ECOgranted 2002-03-26cancelled 2002-12-13
Successor callsigns
Callsigns held now by people who previously held W3DIF.
No current licensee on record previously held this callsign.