Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5SW callsign genealogy
Currently held by OLIVER, PHILIP M
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 N5SW's current licensee, walking backwards.
- OLIVER, PHILIP MCAgranted 2004-10-15cancelled 2005-01-25
Successor callsigns
Callsigns held now by people who previously held N5SW.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5SW, oldest first.
- GUSCHKE, CHARLES M MD1993-01-05 → cancelled 2005-01-06
- OLIVER, PHILIP M AZ2024-12-27 active