There are many other domains on this IP address some are infected, so it is likely this is an IP block rather than a domain block.
I would repeat the process but with the following information:
contact form, http://www.avast.com/contact-form.php?loadStyles for: * Sales inquiries; Technical issues; Website issues; Report false virus alert in file; Report false virus alert on website; Undetected Malware; Press (Media), issues.
Enter the web URL for the site you wish to submit for Network Shield review, etc. A link to this topic also wouldn’t hurt.