Confidence: Medium · Source: FCC ULS · As of 2026-09-11
KB4Z callsign genealogy
Currently held by DOBES, JAMES 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 KB4Z's current licensee, walking backwards.
- DOBES, JAMES MTNgranted 1997-06-22cancelled 2000-10-28
Successor callsigns
Callsigns held now by people who previously held KB4Z.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KB4Z, oldest first.
- BYRD, ROBERT D GA1996-08-28 → cancelled 2000-09-01
- DOBES, JAMES M TN2020-08-07 active