Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT4B callsign genealogy
Currently held by BRENNER, JAMES B
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 NT4B's current licensee, walking backwards.
- WICKHAM, ROBERT AFLgranted 2016-05-26cancelled 2016-08-02
Successor callsigns
Callsigns held now by people who previously held NT4B.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NT4B, oldest first.
- BRENNER, JAMES B FL2004-04-22 → cancelled 2016-07-14
- WICKHAM, ROBERT A FL2026-06-06 active