Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0KOC callsign genealogy
Currently held by Howard, Stephen F
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 K0KOC's current licensee, walking backwards.
- Zyrianov, SergejMDgranted 2008-07-21cancelled 2008-08-08
Successor callsigns
Callsigns held now by people who previously held K0KOC.
- Howard, Stephen FMNgranted 2022-05-18
All historical holders
Every license row we've seen with the callsign K0KOC, oldest first.
- Howard, Stephen F MN2002-08-09 → cancelled 2002-12-10
- Zyrianov, Sergej MD2018-05-11 active