Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5ROI callsign genealogy
Currently held by Hosman, Keith C
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 K5ROI's current licensee, walking backwards.
- Hosman, Keith CTXgranted 2016-01-28cancelled 2016-02-19
Successor callsigns
Callsigns held now by people who previously held K5ROI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5ROI, oldest first.
- SHIRLEY SR, ROBERT R TX1994-12-19 → cancelled 2006-12-20
- Hosman, Keith C TX2025-12-10 active