Confidence: Medium · Source: FCC ULS · As of 2026-09-12
W7KCC callsign genealogy
Currently held by OSTERMILLER, DIRK 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 W7KCC's current licensee, walking backwards.
- Rowley, MarilynCAgranted 2010-01-22cancelled 2010-04-20
Successor callsigns
Callsigns held now by people who previously held W7KCC.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign W7KCC, oldest first.
- OSTERMILLER, DIRK H UT1994-09-30 → cancelled 2006-10-03
- Rowley, Marilyn CA2020-05-14 active