Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N0CSO callsign genealogy
Currently held by OLDFIELD, CLIVE 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 N0CSO's current licensee, walking backwards.
- OLDFIELD, CLIVE SCOgranted 2020-11-16cancelled 2020-12-08
Successor callsigns
Callsigns held now by people who previously held N0CSO.
- OLDFIELD, CLIVE SSCgranted 2026-09-04