Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI4ZTQ callsign genealogy
Currently held by Johnson, Mark 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 KI4ZTQ's current licensee, walking backwards.
- Johnson, Markq AGAgranted 2000-06-22cancelled 2007-10-09
Successor callsigns
Callsigns held now by people who previously held KI4ZTQ.
- Johnson, Mark AGAgranted 2020-04-28