Marc Ohmann’s Blog

SEOmoz.org has a great collection of all the freely available tools online to gather publicly available information about a site.

I’ll repeat it here for simplicity…
Technical Data

• IP Address – via DomainTools Search
  (e.g. SEOmoz - 204.15.225.178)
• Other Sites on an IP Address – via IP Query at Live.com
  (e.g. SEOmoz’s – 204.15.225.178)
• Server Type – via DomainTools Search
  (e.g. SEOmoz - Apache)
• Response Time – via DomainTools Search
  (e.g. SEOmoz - 5.78ms)
• Name Server – via DomainTools Search
  (e.g. SEOmoz - dns1.dedicatedns.com)
• W3C Validation - via W3C Markup Validator
  (e.g. SEOmoz – we passed!)
• CSS Validation – via W3C CSS Validator
  (e.g. SEOmoz – validates)
• Speed Report – via WebsiteOptimization.com
  (e.g. SEOmoz, 23.44 seconds @ 56K – sadly, you can’t link directly to these)
• Use of Text – via Ranks.nl KW Density Checker
  (e.g. SEOmoz’s homepage has 662 total words, 336 uniques and “seo” is the most common, again you can’t link directly to these pages; note – I’m not endorsing KW Density; I just appreciate their tool)
• HTTP Headers Response – via Web Sniffer
  (e.g. SEOmoz – 200 OK)

Ownership/Hosting Data

• Whois Data (registrant, registration date, contacts, etc.) – via DomainTools Search
  (e.g. SEOmoz)
• Additional Sites Owned/Registered – via DomainTools Search and Alexa
  (e.g. SEOmoz @ DomainTools & SEOmoz @ Alexa)
• SSL Certificates Issued – via DomainTools Search
• IP History – via DomainTools Search
• Hosting History – via Netcraft
• Whois History – via DomainTools Search
  (e.g. SEOmoz)

Statistics/Popularity Data

• Alexa Rank – via Alexa
  (e.g. SEOmoz @ Alexa – 864th most popular site)
• Alexa Reach – via Alexa
  (e.g. SEOmoz @ Alexa – 1395 per million users)
• Alexa Page Views Estimate – via Alexa
  (e.g. SEOmoz @ Alexa – 2.7 per user)
• Google Trends Data – via Google Trends
  (e.g. SEOmoz – no data; only available for highly searched-for domains)
• Compete Snapshot – via Compete.com
  (e.g. SEOmoz – 5854 visitors in August, ranked #204,215th most popular site; no direct linking in)
• Ranking.com Rank – via Ranking.com
  (e.g. SEOmoz – 26,741st most popular site)
• Netcraft Ranking – via Netcraft
  (e.g. SEOmoz - 20,319th most popular site)
• Bloglines Subscribers – via Bloglines Feed Search
  (e.g. SEOmoz – 448 subscribers)

Search Engine Indexing Data

• Google’s Indexed Pages – via Google site: command
  (e.g. SEOmoz – 18,400 pages)
• Yahoo! Pages Indexed – via Yahoo! Site Explorer
  (e.g. SEOmoz – 5,432 pages)
• MSN Pages Indexed – via Live.com  site: command
  (e.g. SEOmoz – 11,416 pages)
• Ask.com Pages Indexed – via Ask
  (e.g. SEOmoz – 362; note that this requires an additional term in the query to return results)
• Gigablast Pages Indexed – via Gigablast Advanced Search
  (e.g. SEOmoz – 1 page)
• Exalead Pages Indexed – via Exalead
  (e.g. SEOmoz – 5,481 pages)
• Clusty Pages Indexed – via Clusty Advanced Search
  (e.g. SEOmoz – 5,867 pages)
• How this Site Looked in the Past - via Wayback Machine
  (e.g. SEOmoz – all the way back from February of 2005)

Link Data

• Yahoo! Link Data – via Yahoo! Site Explorer
  (e.g. SEOmoz – 187,234 external links)
• Technorati Link Data – via Technorati
  (e.g. SEOmoz – 8,961 links from 2,541 blogs)
• MSN Link Data – via Live.com
  (e.g. SEOmoz – 107,512 external links)
• Google Link Data – via Google (note that this information is purposefully inaccurate)
  (e.g. SEOmoz – a uselessly erroneous 2,370 links)
• Google PageRank – via RankAlert (shows for all 72 datacenters)
  (e.g. SEOmoz – PR 5/10 or 6/10 depending on DC)
• Exalead Links – via Exalead
  (e.g. SEOmoz – 4,308 external links)

Social Tagging Data

• Bookmarks at Del.icio.us – via Del.icio.us
  (e.g. SEOmoz – 31 pages, thousands of bookmarks)
• Pages in StumbleUpon – via StumbleUpon Reviews
  (e.g. SEOmoz)
• Mentions at Digg – via Digg Search
  (e.g. SEOmoz - 50+)
• Mentions at Reddit – via Reddit Search
  (e.g. SEOmoz – 21)
• Mentions at Tailrank – via Tailrank Search
  (e.g. SEOmoz –
• Mentions at Newsvine – via Newsvine
  (e.g. SEOmoz – 1)

Third-Party Trust Metrics

• TrustGauge Rank – via TrustGauge
• Better Business Bureau Listings – via BBBOnline.org
• Truste Sealholders – via Truste Member List (sadly, no search function)

Important Directory & Site Listings

• Listings in the Open Directory Project – via DMOZ
  (e.g. SEOmoz – 3)
• Listings in Wikipedia – via Wikipedia Search
  (e.g. SEOmoz – 12)
• Listings in the Yahoo! Directory – via dir.yahoo.com
  (e.g. SEOmoz – 1)
• Listings in MSN’s bCentral - via bCentral
• Listings in Business.com – via Google Search (as Business.com has none of their own)
• Links in Google Groups – via Groups.Google.com
  (e.g. SEOmoz – 134)

Press & Media Mentions

• Listings in Google News – via news.google.com
  (e.g. SEOmoz –
• Listings in Google News Archive – via archive search
  (e.g. SEOmoz – 58)
• Listings in Yahoo! News – via news.yahoo.com
  (e.g. SEOmoz – 13)