Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KX4IR callsign genealogy
Currently held by Pierson, James D
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 KX4IR's current licensee, walking backwards.
- Pierson, James DFLgranted 2017-04-28cancelled 2018-02-14
Successor callsigns
Callsigns held now by people who previously held KX4IR.
- Pierson, James DFLgranted 2018-05-01