Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K0CBS callsign genealogy
Currently held by Shannon, Mark W
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 K0CBS's current licensee, walking backwards.
- SHANNAN, MARK WMOgranted 1994-07-21cancelled 2001-05-22
Successor callsigns
Callsigns held now by people who previously held K0CBS.
- Shannon, Mark WMOgranted 2026-01-03