Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KB0JEF callsign genealogy
Currently held by MC COY, CHAD 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 KB0JEF's current licensee, walking backwards.
- Dvorak, Jeffrey JMNgranted 2019-11-15cancelled 2025-08-05
Successor callsigns
Callsigns held now by people who previously held KB0JEF.
All historical holders
Every license row we've seen with the callsign KB0JEF, oldest first.
- MC COY, CHAD M KS1996-05-15 → cancelled 2003-07-10
- POTTER, JEFFREY B CO2016-10-18 → cancelled 2017-09-06
- Dvorak, Jeffrey J MN2025-08-05 → cancelled 2025-12-09