Confidence: Medium · Source: FCC ULS · As of 2026-09-12
WA7ZK callsign genealogy
Currently held by RICHARDSON, MARK H
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 WA7ZK's current licensee, walking backwards.
- RICHARDSON, MARK HWAgranted 2000-10-03cancelled 2009-07-14
Successor callsigns
Callsigns held now by people who previously held WA7ZK.
No current licensee on record previously held this callsign.