Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5SOX callsign genealogy
Currently held by ARBUCKLE, HAROLD L
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 K5SOX's current licensee, walking backwards.
- KOCHANOWICZ, LAWRENCE PTXgranted 2007-01-04cancelled 2016-08-23
Successor callsigns
Callsigns held now by people who previously held K5SOX.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K5SOX, oldest first.
- ARBUCKLE, HAROLD L TX1995-01-26 → cancelled 2007-01-27
- KOCHANOWICZ, LAWRENCE P TX2016-08-23 active