Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NT4AL callsign genealogy
Currently held by Lisler, Alan 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 NT4AL's current licensee, walking backwards.
- Lisler, Alan BFLgranted 2022-02-14cancelled 2022-03-15
Successor callsigns
Callsigns held now by people who previously held NT4AL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NT4AL, oldest first.
- FRAZER JR, ALEXANDER FL1997-11-25 → cancelled 1998-01-14
- Lisler, Alan B FL2022-03-15 active