Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W1DWF callsign genealogy
Currently held by MULLIGAN SR, JOSEPH 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 W1DWF's current licensee, walking backwards.
- FARRINGTON, DAVID WMAgranted 2004-03-16cancelled 2010-11-19
Successor callsigns
Callsigns held now by people who previously held W1DWF.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W1DWF, oldest first.
- MULLIGAN SR, JOSEPH A MA1992-08-25 → cancelled 2004-08-26
- FARRINGTON, DAVID W NH2020-10-03 active