Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC9OTN callsign genealogy
Currently held by ROWE SR, WILLIAM A
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 KC9OTN's current licensee, walking backwards.
The current licensee has not held any other callsign on record.
Successor callsigns
Callsigns held now by people who previously held KC9OTN.
- ROWE SR, WILLIAM AILgranted 2008-12-08cancelled 2020-12-09