Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NB4U callsign genealogy
Currently held by SHARROCK, GEORGE 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 NB4U's current licensee, walking backwards.
- Davidson Jr, Jerry LFLgranted 2003-10-10cancelled 2009-05-01
Successor callsigns
Callsigns held now by people who previously held NB4U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB4U, oldest first.
- SHARROCK, GEORGE O AK1998-09-02 → cancelled 2005-03-06
- Davidson Jr, Jerry L FL2019-04-09 active