Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W4MKH callsign genealogy
Currently held by HARRISON, MARSHALL 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 W4MKH's current licensee, walking backwards.
- Harrison, Marshall KFLgranted 2006-05-09cancelled 2007-02-13
Successor callsigns
Callsigns held now by people who previously held W4MKH.
- Harrison, Marshall KFLgranted 2026-09-01