Confidence: Medium · Source: FCC ULS · As of 2026-09-12
K7OB callsign genealogy
Currently held by OBERHOLTZER, RUSSELL E
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 K7OB's current licensee, walking backwards.
Successor callsigns
Callsigns held now by people who previously held K7OB.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign K7OB, oldest first.
- OBERHOLTZER, RUSSELL E FL2010-10-07 → cancelled 2015-05-16
- McCain, Timothy A AZ2017-06-06 active