Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KZ4U callsign genealogy
Currently held by HOBSON, MARK E
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 KZ4U's current licensee, walking backwards.
- HOBSON, MARK EALgranted 2005-04-26cancelled 2009-06-06
Successor callsigns
Callsigns held now by people who previously held KZ4U.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KZ4U, oldest first.
- WALTER, WINTON P VA2005-04-21 → cancelled 2007-03-05
- HOBSON, MARK E AL2019-03-28 active