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Trust Flow
Link Quality
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Citation Flow
Link Volume

The W3C Markup Validation Service

External backlinks




Incoming links from other websites, excludes supplemental

Referring domains

Unique domains linking to this site. Breakdown

Referring IPs

Unique IPs hosting referring domains

Referring Subnets

Unique Class-C subnets

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Outbound Links

16 Internal
4 External
20 Total Outlinks
3 Ext Domains
(Average per Crawled Page)


Crawled URLs 2,767
Indexed URLs 80,949,126
Educational Ref. Backlinks 25,904,852
Governmental Ref. Backlinks 20,703,539
Educational Ref. Domains 4,743
Governmental Ref. Domains 2,944

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A report of the detected language for each page on this domain, and the languages of incoming anchor texts.

Incoming Languages

2,142,299,111 checked backlinks

  •   46% en English
  •   8.7% de German
  •    6.8% fr French
  •    5.2% es Spanish/Castilian
  •    5.2% it Italian
  •    3.5% ru Russian
  •    2.7% pl Polish
  •    2.2% th Thai
  •    1.5% ja Japanese
  •    1.1% cs Czech
  •    17.1% OTH Other

Site Languages

30 language-detected crawled URLs

  •   90% en English

Topical Trust Flow

A measure of how close you are to the most trusted websites in almost one thousand categories.

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Referring Domains Breakdown

Referring Domains

This chart shows the number of Referring Domains reviewed every day.

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Anchor Text

See more results on the Anchor Text tab, where you can drill down into each keyword and find the Referring Domains and External Backlinks that use that Keyword.

# Anchor Text Referring Domains External Backlinks
Total Deleted NoFollow
1 valid xhtml 1.0 transitional Subscribe
122,664,856 4,167,358 10,126,931
2 xhtml Subscribe
697,253,584 16,024,828 44,172,321
3 valid xhtml Subscribe
86,330,533 2,664,685 22,598,990
4 valid xhtml 1.0 strict Subscribe
58,654,274 1,319,582 5,979,040
5 valid html5 Subscribe
202,952,290 6,200,303 195,475,354
6 valid html 4.01 transitional Subscribe
34,886,807 1,299,857 2,147,518
7 valid xhtml 1.0! Subscribe
102,568,370 3,749,694 7,722,175
8 valid html 4.01! Subscribe
17,179,728 769,808 284,720
9 xhtml 1.0 Subscribe
62,678,295 1,805,080 5,878,355

The above chart may have cropped text due to size restrictions, for full details visit the Anchor Text tab. We explain how this is created in the FAQs.

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