Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N4ISR callsign genealogy
Currently held by BLODGETT, HAROLD G
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 N4ISR's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held N4ISR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4ISR, oldest first.
- BLODGETT, HAROLD G VA1988-10-11 → cancelled 2000-10-12
- Snyder Mr, Colin B IN2017-03-14 active