Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W0ABC callsign genealogy
Currently held by Slauson, Douglas M
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 W0ABC's current licensee, walking backwards.
- Slauson, Douglas MIAgranted 2007-02-16cancelled 2011-04-08
Successor callsigns
Callsigns held now by people who previously held W0ABC.
- JOHNSTON, PHILLIP ACOgranted 2018-09-12
All historical holders
Every license row we've seen with the callsign W0ABC, oldest first.
- JOHNSTON, PHILLIP A MO2007-07-26 → cancelled 2008-11-25
- Slauson, Douglas M IA2021-01-27 active