Confidence: Medium · Source: FCC ULS · As of 2026-09-14
W0GCR callsign genealogy
Currently held by RETTKE, GRANT
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 W0GCR's current licensee, walking backwards.
- RETTKE, GRANTWIgranted 2020-05-29
Successor callsigns
Callsigns held now by people who previously held W0GCR.
- RETTKE, GRANTWIgranted 2020-05-29
All historical holders
Every license row we've seen with the callsign W0GCR, oldest first.
- CARLSON, CLARENCE G MN1988-06-28 → cancelled 1997-09-20
- RETTKE, GRANT WI2019-10-04 → cancelled 2020-05-29