Seems fine here.
If you're using Windows, try flushing your DNS cache. This will remove all locally stored DNS entries that translate domain names to IP addresses.
Either go to Start > Run or type in the search box: ipconfig /flushdns
If that doesn't do anything, try clearing your browser's cache.
If that doesn't do anything, try scanning for malware with a program called malwarebytes found at malwarebytes.org