Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W9MHC callsign genealogy
Currently held by Colgan SR, Mark H
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 W9MHC's current licensee, walking backwards.
- Colgan Sr, Mark HINgranted 2018-01-22cancelled 2019-02-12
Successor callsigns
Callsigns held now by people who previously held W9MHC.
No current licensee on record previously held this callsign.