Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4LB callsign genealogy
Currently held by OLSON, HOWARD J
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 K4LB's current licensee, walking backwards.
- OSBORNE, MARK EKYgranted 1998-05-11cancelled 2000-07-04
Successor callsigns
Callsigns held now by people who previously held K4LB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K4LB, oldest first.
- OLSON, HOWARD J FL1988-06-14 → cancelled 2000-06-15
- OSBORNE, MARK E KY2020-04-14 active