Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K9OBL callsign genealogy
Currently held by GRESSICK, JEFFREY 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 K9OBL'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 K9OBL.
- GRESSICK, JEFFREY AMIgranted 2020-04-29