Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WD0FDN callsign genealogy
Currently held by Martin, David 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 WD0FDN's current licensee, walking backwards.
- Martin, David CMOgranted 2000-06-23cancelled 2001-01-03
Successor callsigns
Callsigns held now by people who previously held WD0FDN.
- Martin, David CMOgranted 2018-04-26
All historical holders
Every license row we've seen with the callsign WD0FDN, oldest first.
- BRANCH, WILLIAM A MO1988-05-10 → cancelled 2000-05-11
- Martin, David C MO2001-01-03 → cancelled 2008-07-22