Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N4DLH callsign genealogy
Currently held by HIGHLAND SR, DAVID 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 N4DLH's current licensee, walking backwards.
- Heintzelman, David LKYgranted 2019-08-06cancelled 2021-09-25
Successor callsigns
Callsigns held now by people who previously held N4DLH.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N4DLH, oldest first.
- HIGHLAND SR, DAVID L GA2000-05-09 → cancelled 2012-05-10
- Heintzelman, David L KY2021-09-25 active