Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0IR callsign genealogy
Currently held by CARLSON, MARK 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 N0IR's current licensee, walking backwards.
- CARLSON, MARK ACOgranted 2001-08-28cancelled 2007-03-30
- KL7ISQno FCC ULS record on file
Successor callsigns
Callsigns held now by people who previously held N0IR.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0IR, oldest first.
- IRWIN JR, THOMAS L NC1997-02-05 → cancelled 1997-11-10
- CARLSON, MARK A NH2017-02-28 active