Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1ATB callsign genealogy
Currently held by Ploski, Mark S
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 K1ATB's current licensee, walking backwards.
- Ploski, Mark SCTgranted 2021-03-18cancelled 2023-04-11
Successor callsigns
Callsigns held now by people who previously held K1ATB.
No current licensee on record previously held this callsign.