Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KA9JNG callsign genealogy
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 KA9JNG's current licensee, walking backwards.
- SPARROW, MARTIN JILgranted 1998-10-23cancelled 2001-05-18
Successor callsigns
Callsigns held now by people who previously held KA9JNG.
- SPARROW, MARTIN JILgranted 1998-10-23cancelled 2001-05-18
All historical holders
Every license row we've seen with the callsign KA9JNG, oldest first.
- SPARROW, MARTIN J IL2021-10-14 active
- —— → cancelled 1998-10-23