Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W9JGO callsign genealogy
Currently held by Olson, John G
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 W9JGO's current licensee, walking backwards.
- Olson, John GILgranted 1998-01-30cancelled 2007-05-22
Successor callsigns
Callsigns held now by people who previously held W9JGO.
- Olson, John GTNgranted 2016-05-07
All historical holders
Every license row we've seen with the callsign W9JGO, oldest first.
- ESTEP, CHARLES B IL1987-10-13 → cancelled 1999-10-14
- Olson, John G IL2007-05-22 → cancelled 2016-05-07