Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7DSL callsign genealogy
Currently held by Schwieterman, Mike J
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 K7DSL's current licensee, walking backwards.
- Silva, Michael AWAgranted 2012-05-15cancelled 2015-02-13
Successor callsigns
Callsigns held now by people who previously held K7DSL.
- Schwieterman Mr., Michael JMTgranted 2019-02-20
All historical holders
Every license row we've seen with the callsign K7DSL, oldest first.
- Schwieterman, Mike J NV2007-05-22 → cancelled 2009-04-11
- Silva, Michael A WA2024-11-22 active