Confidence: Medium · Source: FCC ULS · As of 2026-09-11
W2MKB callsign genealogy
Currently held by Baum, Mitchel K
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 W2MKB's current licensee, walking backwards.
- Barnhouse, Matthew KCAgranted 2018-10-09cancelled 2019-11-05
Successor callsigns
Callsigns held now by people who previously held W2MKB.
- Baum, Mitchel KFLgranted 2009-03-03cancelled 2012-09-08
All historical holders
Every license row we've seen with the callsign W2MKB, oldest first.
- Baum, Mitchel K FL2003-12-02 → cancelled 2009-03-03
- Barnhouse, Matthew K CA2019-11-05 active