Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4MAC callsign genealogy
Currently held by Crawford, Mark A
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 N4MAC's current licensee, walking backwards.
- Crawford, Mark ATXgranted 2012-06-05cancelled 2012-07-03
Successor callsigns
Callsigns held now by people who previously held N4MAC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4MAC, oldest first.
- MARTIN JR, LOUIS F FL2000-03-29 → cancelled 2012-06-13
- Crawford, Mark A TX2022-04-29 active