Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4ISO callsign genealogy
Currently held by Miller, Christopher 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 K4ISO's current licensee, walking backwards.
- Miller, Christopher AGAgranted 2014-10-06cancelled 2015-10-23
Successor callsigns
Callsigns held now by people who previously held K4ISO.
No current licensee on record previously held this callsign.