Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0ISU callsign genealogy
Currently held by FRENCH, ROBERT F
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 N0ISU's current licensee, walking backwards.
- Carroll, Mitchel KIAgranted 2016-04-18cancelled 2017-04-07
Successor callsigns
Callsigns held now by people who previously held N0ISU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0ISU, oldest first.
- FRENCH, ROBERT F CO2001-10-31 → cancelled 2014-01-29
- Carroll, Mitchel K IA2017-04-07 active