I just worked a callsign (UA2KU) that does not appear in the QRZ database but that does appear on other services on the web. am I supposed to / allowed to update the QRZ database with this data? ty!
No. Only the holder of that call sign may request that it be added to the QRZ database. If you can find an email for him, you could potentially email him and ask that he contact QRZ to be added. But it's up to him. Dave W7UUU