Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K5SZ callsign genealogy
Currently held by SOUTH TEXAS DX OPERATORS
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 K5SZ's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K5SZ.
No current licensee on record previously held this callsign.