Confidence: Medium · Source: FCC ULS · As of 2026-09-12
NO1H callsign genealogy
Currently held by THELEN III, FRANK
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 NO1H's current licensee, walking backwards.
- Eckhert, Marc JCAgranted 2017-07-17cancelled 2020-07-18
Successor callsigns
Callsigns held now by people who previously held NO1H.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign NO1H, oldest first.
- THELEN III, FRANK ME2009-01-21 → cancelled 2018-05-21
- Eckhert, Marc J CA2020-07-18 active