Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0SZ callsign genealogy
Currently held by ROCKY MOUNTAIN HAM RADIO
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 N0SZ's current licensee, walking backwards.
- KC0IRKcancelledMOUNTAIN TOP ASSOCIATES OF COLORADOCOgranted 2000-08-22cancelled 2000-09-09
Successor callsigns
Callsigns held now by people who previously held N0SZ.
No current licensee on record previously held this callsign.