Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4IVB callsign genealogy
Currently held by CALVERT, ROBERT J
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 N4IVB's current licensee, walking backwards.
- WD4OYTno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N4IVB.
- Calvert, Robert JFLgranted 2010-11-20cancelled 2014-09-21