Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC6ZTW callsign genealogy
Currently held by GRIEFER, ALLAN 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 KC6ZTW's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC6ZTW.
- GRIEFER, ALLAN DNVgranted 2011-06-14cancelled 2014-11-04