Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NF1L callsign genealogy
Currently held by Duffy Jr, Jack H
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 NF1L's current licensee, walking backwards.
- Duffy Jr, Jack HNHgranted 2007-02-08cancelled 2007-09-15
Successor callsigns
Callsigns held now by people who previously held NF1L.
- MAC DONALD, HARRY JRIgranted 2009-01-13cancelled 2009-03-03
All historical holders
Every license row we've seen with the callsign NF1L, oldest first.
- Duffy Jr, Jack H NH2017-06-20 active
- —— → cancelled 1999-03-17