Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0CAB callsign genealogy
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 KC0CAB's current licensee, walking backwards.
- BIER, CHRISTOPHER AMOgranted 2010-05-11cancelled 2012-05-18
Successor callsigns
Callsigns held now by people who previously held KC0CAB.
- K0YBcancelledCOLORADO VHF GROUPCOgranted 2008-08-12cancelled 2013-04-19
All historical holders
Every license row we've seen with the callsign KC0CAB, oldest first.
- BIER, CHRISTOPHER A MO2022-04-15 active
- —— → cancelled 1997-12-03