Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5DO callsign genealogy
Currently held by Cockrum, 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 N5DO's current licensee, walking backwards.
- Allan, John CMOgranted 2025-06-28cancelled 2026-09-01
Successor callsigns
Callsigns held now by people who previously held N5DO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5DO, oldest first.
- Cockrum, David L TX2017-10-26 → cancelled 2024-08-13
- Allan II, John C MO2026-09-01 active