Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N1FMJ callsign genealogy
Currently held by ISAACS, KATHERINE M
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 N1FMJ's current licensee, walking backwards.
- Nowell, Casey JALgranted 2023-02-18cancelled 2023-03-25
Successor callsigns
Callsigns held now by people who previously held N1FMJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1FMJ, oldest first.
- ISAACS, KATHERINE M MA2000-05-20 → cancelled 2012-05-08
- Nowell, Casey J AL2023-03-25 active