Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KI0RJ callsign genealogy
Currently held by ROWEKAMP, WILLIAM J
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 KI0RJ's current licensee, walking backwards.
- ROWEKAMP, WILLIAM JMOgranted 1989-08-01cancelled 2000-01-04
Successor callsigns
Callsigns held now by people who previously held KI0RJ.
- ROWEKAMP, WILLIAM JAZgranted 2009-12-15cancelled 2018-10-05