Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K3ABZ callsign genealogy
Currently held by Serio, Mark R
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 K3ABZ's current licensee, walking backwards.
- Serio, Mark RMDgranted 2023-07-04cancelled 2023-07-25
Successor callsigns
Callsigns held now by people who previously held K3ABZ.
No current licensee on record previously held this callsign.