Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC0SEO callsign genealogy
Currently held by Black, Michael
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 KC0SEO's current licensee, walking backwards.
- BLACK, MICHAELKSgranted 2024-06-07cancelled 2024-06-25
Successor callsigns
Callsigns held now by people who previously held KC0SEO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0SEO, oldest first.
- ACKER, ADAM A MN2004-04-23 → cancelled 2016-04-26
- Black, Michael KS2024-06-25 active