Confidence: Medium · Source: FCC ULS · As of 2026-09-14
KC0HPO callsign genealogy
Currently held by Tweer, Helmut
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 KC0HPO's current licensee, walking backwards.
- TWEER, HELMUTKSgranted 2021-08-05cancelled 2021-09-08
Successor callsigns
Callsigns held now by people who previously held KC0HPO.
No current licensee on record previously held this callsign.
All historical holders
Every license row we've seen with the callsign KC0HPO, oldest first.
- Bradford, Lynn R MN2000-04-04 → cancelled 2012-04-05
- Tweer, Helmut KS2021-09-08 active