Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0CBI callsign genealogy
Currently held by Markham, David B
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 W0CBI's current licensee, walking backwards.
- Markham, David BCOgranted 2005-09-30cancelled 2007-02-09
Successor callsigns
Callsigns held now by people who previously held W0CBI.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0CBI, oldest first.
- EGLI, GEORGE W CO1998-05-12 → cancelled 2002-06-30
- Markham, David B CO2016-11-14 active