Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0ZTT callsign genealogy
Currently held by Knowles, Christopher J
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 KC0ZTT's current licensee, walking backwards.
- Knowles, Christopher JCOgranted 2007-02-21cancelled 2007-03-05
Successor callsigns
Callsigns held now by people who previously held KC0ZTT.
No current licensee on record previously held this callsign.