Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5CSI callsign genealogy
Currently held by Patterson 260, David 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 W5CSI's current licensee, walking backwards.
- Patterson, David LMSgranted 2006-05-16cancelled 2008-04-11
Successor callsigns
Callsigns held now by people who previously held W5CSI.
No current licensee on record previously held this callsign.