Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N1SC callsign genealogy
Currently held by COHEN, STUART 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 N1SC's current licensee, walking backwards.
- MCGRATH, JEFFREY DUTgranted 2013-12-31cancelled 2016-04-01
Successor callsigns
Callsigns held now by people who previously held N1SC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N1SC, oldest first.
- COHEN, STUART A WA2007-02-13 → cancelled 2014-03-12
- MCGRATH, JEFFREY D UT2026-02-20 active