Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K9OL callsign genealogy
Currently held by FELIX ORTIZ, CARLOS E
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 K9OL's current licensee, walking backwards.
- FELIX ORTIZ, CARLOS EINgranted 2019-12-17cancelled 2023-09-26
Successor callsigns
Callsigns held now by people who previously held K9OL.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K9OL, oldest first.
- BATH, WILLIAM L IL2011-09-22 → cancelled 2023-09-08
- FELIX ORTIZ, CARLOS E IN2023-09-26 active