Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KB3EKZ callsign genealogy
Currently held by WILLIAMS, JAMES D
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 KB3EKZ's current licensee, walking backwards.
- Mazur, Matthew RPAgranted 2019-08-13cancelled 2019-09-04
Successor callsigns
Callsigns held now by people who previously held KB3EKZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB3EKZ, oldest first.
- WILLIAMS, JAMES D MD1999-12-07 → cancelled 2011-12-08
- Mazur, Matthew R PA2019-09-04 active