Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K4HAX callsign genealogy
Currently held by Mach, Darwin L
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 K4HAX's current licensee, walking backwards.
- Mach, Darwin LVAgranted 2014-10-20cancelled 2014-11-07
Successor callsigns
Callsigns held now by people who previously held K4HAX.
- PEMBERTON, J MAXKYgranted 1996-06-29cancelled 1999-01-11