My SEO e-Guide by Nicolas Gremion - HTML preview

8. Domain Related Information

Information that you used to register your domain name, including contact information, length of registration and nameservers (servers that resolve your domain name to IP address) is used to determine the legitimacy of domains. Google uses pattern matching between information about your domain with that of known illegitimate domains. Google also looks at whether this contact information, hosting company or nameservers has changed relatively often.

• A good nameserver is likely to host domains from a variety of domains and to have a history of hosting those domains, whilst a bad nameserver may be hosting domains for pornography sites, doorway pages or domains with commercial words (common indicator of SPAM) or primarily bulk domains from a single registrar or the nameserver may be brand new. Brand new nameservers are not necessarily bad unless having a combination of other negative factors.
• The cheapest domain registrar is likely to have registered a large number of doorway domains. Use someone reputable who registers domains for corporate companies.
• Find ISPs by doing a WHOIS lookup on highly ranked sites.
• Use nameservers from top level ISPs.
• Use a reputable corporate ISP who does not deal with pornography domains.
• Register your domain for as long as possible, ideally 10 years.