Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4XTZ callsign genealogy
Currently held by COLEY, MARK 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 N4XTZ's current licensee, walking backwards.
- KJ4CKHcancelledSmokey Mountain Digital HamsTNgranted 2008-03-03cancelled 2008-03-25
Successor callsigns
Callsigns held now by people who previously held N4XTZ.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4XTZ, oldest first.
- COLEY, MARK L TN2001-09-14 → cancelled 2007-07-17
- Smokey Mountain Digital Hams. Inc. TN2018-04-03 active