Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1UIO callsign genealogy
Currently held by Holt, Oliver 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 K1UIO's current licensee, walking backwards.
- Holt, Oliver DNHgranted 2022-04-05cancelled 2022-04-23
Successor callsigns
Callsigns held now by people who previously held K1UIO.
No current licensee on record previously held this callsign.