Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K1OBK callsign genealogy
Currently held by Viets, Phillip 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 K1OBK's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K1OBK.
No current licensee on record previously held this callsign.