Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W5CSM callsign genealogy
Currently held by Null, 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 W5CSM's current licensee, walking backwards.
- Null, David LTXgranted 2005-05-10cancelled 2005-07-23
Successor callsigns
Callsigns held now by people who previously held W5CSM.
No current licensee on record previously held this callsign.