Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0IBA callsign genealogy
Currently held by Markus, Eric G
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 W0IBA's current licensee, walking backwards.
- Markus, Eric GCOgranted 2012-03-08cancelled 2019-11-22
Successor callsigns
Callsigns held now by people who previously held W0IBA.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W0IBA, oldest first.
- LEMONS, WILLIAM F KS1996-09-24 → cancelled 2008-09-25
- Markus, Eric G CO2019-11-22 active