Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4OLB callsign genealogy
Currently held by Clark, Charles S
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 K4OLB's current licensee, walking backwards.
- Clark, Charles SFLgranted 2021-01-19cancelled 2021-02-09
Successor callsigns
Callsigns held now by people who previously held K4OLB.
No current licensee on record previously held this callsign.