Confidence: Medium · Source: FCC ULS · As of 2026-09-14
NB5O callsign genealogy
Currently held by Marsh, Robert H
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 NB5O's current licensee, walking backwards.
- MILLER, CURTIS LARgranted 2021-12-09cancelled 2026-06-05
Successor callsigns
Callsigns held now by people who previously held NB5O.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NB5O, oldest first.
- Marsh, Robert H TX2014-04-02 → cancelled 2026-04-29
- MILLER, CURTIS L AR2026-06-05 active
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