Confidence: Medium · Source: FCC ULS · As of 2026-09-12
KC4MAC callsign genealogy
Currently held by McWhirter Jr, Horace B
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 KC4MAC's current licensee, walking backwards.
- McWhirter Jr, Horace BGAgranted 2019-03-21cancelled 2019-05-17
Successor callsigns
Callsigns held now by people who previously held KC4MAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC4MAC, oldest first.
- NOLES, MARK E NC1999-04-23 → cancelled 2011-04-26
- McWhirter Jr, Horace B GA2019-05-17 active