Confidence: Medium · Source: FCC ULS · As of 2026-09-14
K1ZHD callsign genealogy
Currently held by Warren, Jeffrey A
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 K1ZHD's current licensee, walking backwards.
- Warren, Jeffrey AMAgranted 2015-04-21cancelled 2015-05-29
Successor callsigns
Callsigns held now by people who previously held K1ZHD.
No current licensee on record previously held this callsign.