Confidence: Medium · Source: FCC ULS · As of 2026-09-14
N0PU callsign genealogy
Currently held by KHOLER, HARRY A M
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 N0PU's current licensee, walking backwards.
- Masson Jr, Timothy PMOgranted 2019-07-10cancelled 2020-01-31
Successor callsigns
Callsigns held now by people who previously held N0PU.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign N0PU, oldest first.
- KHOLER, HARRY A M MO2010-12-04 → cancelled 2018-01-12
- Masson Jr, Timothy P MO2020-01-31 active