Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0OST callsign genealogy
Currently held by LABO, JAMES A
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 K0OST's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held K0OST.
- LABO, JAMES ACOgranted 1999-11-03cancelled 2011-11-04