Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KO1N callsign genealogy
Currently held by CHESAPEAKE CONTEST CLUB
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 KO1N's current licensee, walking backwards.
- Bradley, John EMSgranted 2007-08-08cancelled 2009-06-09
Successor callsigns
Callsigns held now by people who previously held KO1N.
- NQ1WexpiredCHESAPEAKE CONTEST CLUBVAgranted 2007-04-24cancelled 2019-04-25
All historical holders
Every license row we've seen with the callsign KO1N, oldest first.
- GELLER, IRVING MA1988-05-24 → cancelled 2000-05-25
- CHESAPEAKE CONTEST CLUB VA2001-02-21 → cancelled 2007-04-24
- Bradley, John E MS2019-05-04 active