Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K6MHO callsign genealogy
Currently held by SWEELEY, MICHAEL W
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 K6MHO's current licensee, walking backwards.
- Ording, Mark HCAgranted 2013-05-28cancelled 2013-07-06
Successor callsigns
Callsigns held now by people who previously held K6MHO.
- SWEELEY, MICHAEL WAKgranted 1999-11-16cancelled 2001-06-19
All historical holders
Every license row we've seen with the callsign K6MHO, oldest first.
- SWEELEY, MICHAEL W AK1999-06-07 → cancelled 1999-11-16
- Ording, Mark H CA2013-07-06 → cancelled 2025-07-08