Confidence: Medium · Source: FCC ULS · As of 2026-09-14
AB8ZO callsign genealogy
Currently held by Knittle, John 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 AB8ZO's current licensee, walking backwards.
- Knittle, John JOHgranted 2007-08-24cancelled 2007-09-14
Successor callsigns
Callsigns held now by people who previously held AB8ZO.
No current licensee on record previously held this callsign.