Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT4JM callsign genealogy
Currently held by MITCHELL, JOHN A
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 NT4JM's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held NT4JM.
- Manos, John SFLgranted 2003-12-02cancelled 2005-01-22
All historical holders
Every license row we've seen with the callsign NT4JM, oldest first.
- Manos, John S FL2003-01-22 → cancelled 2003-12-02
- MITCHELL, JOHN A TN2019-06-01 active