Confidence: Medium · Source: FCC ULS · As of 2026-09-12
AD0OY callsign genealogy
Currently held by Northness, Michael J
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 AD0OY's current licensee, walking backwards.
- Northness, Michael JIAgranted 2015-03-24cancelled 2015-04-27
Successor callsigns
Callsigns held now by people who previously held AD0OY.
- Northness, Michael JIAgranted 2020-05-02