Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0SAX callsign genealogy
Currently held by O'Hara, Cavan M
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 KC0SAX's current licensee, walking backwards.
- O'Hara, Cavan MIAgranted 2016-08-12cancelled 2017-07-04
Successor callsigns
Callsigns held now by people who previously held KC0SAX.
- Hanna, Christopher MNEgranted 2024-03-23
All historical holders
Every license row we've seen with the callsign KC0SAX, oldest first.
- Hanna, Christopher M NE2004-04-02 → cancelled 2004-04-23
- O'Hara, Cavan M IA2017-07-04 active