Confidence: Medium · Source: FCC ULS · As of 2026-09-12
ND4O callsign genealogy
Currently held by NICHOLS, DELBERT W
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 ND4O's current licensee, walking backwards.
- SENYKOFF, RONALD SVAgranted 2009-12-18cancelled 2010-10-09
Successor callsigns
Callsigns held now by people who previously held ND4O.
- JENKINS, PHILIP JNCgranted 2018-06-23
All historical holders
Every license row we've seen with the callsign ND4O, oldest first.
- NICHOLS, DELBERT W FL1992-02-25 → cancelled 2004-02-26
- JENKINS, PHILIP J NC2004-03-16 → cancelled 2008-09-20
- SENYKOFF SR, RONALD S FL2020-12-29 active