Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KA9NYU callsign genealogy
Currently held by Johnson, Michael P
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 KA9NYU's current licensee, walking backwards.
- Johnson, Michael PILgranted 2009-07-24cancelled 2012-07-31
Successor callsigns
Callsigns held now by people who previously held KA9NYU.
- Johnson, Michael PWIgranted 2025-04-29
All historical holders
Every license row we've seen with the callsign KA9NYU, oldest first.
- JOHNSON, MICHAEL P IL1997-04-07 → cancelled 2009-04-08
- Johnson, Michael P WI2022-07-06 → cancelled 2025-04-29