Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0AAJ callsign genealogy
Currently held by ISLER, JAMES R
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 N0AAJ's current licensee, walking backwards.
- ISLER, JAMES RCOgranted 2004-12-15cancelled 2005-01-04
Successor callsigns
Callsigns held now by people who previously held N0AAJ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0AAJ, oldest first.
- BUTKOFSKI, JAMES J MN1988-09-27 → cancelled 2000-09-28
- ISLER, JAMES R CO2015-01-01 active