Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4IOI callsign genealogy
Currently held by THOMAS, JEFFREY D
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 N4IOI's current licensee, walking backwards.
- Thomas, Jeffrey DTNgranted 2014-05-08cancelled 2016-05-10
Successor callsigns
Callsigns held now by people who previously held N4IOI.
No current licensee on record previously held this callsign.