Confidence: Medium · Source: FCC ULS · As of 2026-09-12
N5OCM callsign genealogy
Currently held by Donald, 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 N5OCM's current licensee, walking backwards.
- Donald, Mark LAZgranted 2025-07-30cancelled 2025-08-19
Successor callsigns
Callsigns held now by people who previously held N5OCM.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N5OCM, oldest first.
- GOODHEAD, DANIEL E TX1999-05-12 → cancelled 2011-05-13
- Donald, Mark L AZ2025-08-19 active