Trust Flow
Link Quality
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Citation Flow
Link Volume


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

Subscribers get Referring Domain, IP and Subnet values for all websites, and Pro+ accounts get Historic Index Plans & Pricing

Outbound Links

35 Internal
3 External
38 Total Outlinks
2 Ext Domains
(Average per Crawled Page)


Crawled URLs 365,214
Indexed URLs 4,444,234
Educational Ref. Backlinks 2,259,334
Governmental Ref. Backlinks 635,415
Educational Ref. Domains 4,080
Governmental Ref. Domains 1,051
IP Address

Link Profile

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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

135,238,265 checked backlinks

  •   71.2% en English
  •    6.7% de German
  •    4.4% fr French
  •    2.8% ru Russian
  •    2.7% it Italian
  •    2.1% tr Turkish
  •    1.9% es Spanish/Castilian
  •    1.5% cs Czech
  •    1.2% ja Japanese
  •    0.8% pt Portuguese
  •    4.7% OTH Other

Site Languages

205,979 language-detected crawled URLs

  •   99.2% en English
  •    0.5% es Spanish/Castilian

Topical Trust Flow

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

Topical Trust Flow is available on all websites, to all subscribers, even on our lowest-price plan.

Plans & Pricing

To see a live example of our amazing Trust Flow categorisation, check out

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 nasa Subscribe
9,985,528 426,274 685,672
2 the original Subscribe
986,389 417,504 985,770
3 discovery Subscribe
340,704 143,943 336,961
4 [1] Subscribe
202,672 78,306 197,702
5 ephemeris Subscribe
344,116 145,924 341,754
6 orbit diagram Subscribe
338,675 143,782 336,813
7 orbital elements Subscribe
338,558 143,775 336,763
8 physical parameters Subscribe
338,443 143,775 336,762
9 close approach Subscribe
337,591 143,762 336,172

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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