Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K5OKI callsign genealogy
Currently held by Brown, Phillip B
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 K5OKI's current licensee, walking backwards.
- ISOM, OAKLEY KOKgranted 2018-05-24cancelled 2018-07-17
Successor callsigns
Callsigns held now by people who previously held K5OKI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5OKI, oldest first.
- Brown, Phillip B OK2003-11-18 → cancelled 2015-11-19
- ISOM, OAKLEY K OK2018-07-17 active