Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W4JOP callsign genealogy
Currently held by Poulsen, John O
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 W4JOP's current licensee, walking backwards.
- Poulsen, John OGAgranted 2009-11-12cancelled 2010-02-20
Successor callsigns
Callsigns held now by people who previously held W4JOP.
No current licensee on record previously held this callsign.