Australian Callsign Look UP
https://web.acma.gov.au/pls/radcom/register_search.main_page
Space Weather Prediction Center
https://www.swpc.noaa.gov/communities/radio-communications
PSKReporter
https://pskreporter.info/pskmap.html
3830Scores
https://www.3830scores.com/
DX Maps
https://www.dxmaps.com/spots/mapg.php?Lan=E&Frec=28&ML=M&Map=W2LN&HF=S&DXC=ING2&GL=N
Amateur Radio Country Files
http://www.country-files.com/contest/n1mm/
VK Contest Club
http://www.vkcc.com/
KiWiSDR
http://kiwisdr.com/
Reverse Beacon Network
https://www.reversebeacon.net/
DX Info Center
https://www.dxinfocentre.com/