Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7OPP callsign genealogy
Currently held by LOEWENSTEIN, ARTHUR 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 K7OPP's current licensee, walking backwards.
- Patton, Jacob WWAgranted 2017-08-31cancelled 2017-10-20
Successor callsigns
Callsigns held now by people who previously held K7OPP.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7OPP, oldest first.
- LOEWENSTEIN, ARTHUR H AZ2004-04-06 → cancelled 2016-05-25
- Patton, Jacob W WA2017-10-20 active