caltech.edu website report
Authority, global rank, the websites that link to caltech.edu, when it was registered and where it's hosted – free, from public data.
authority
global rank of 133,241,980
websites link to it
domain age
How strong is caltech.edu?
caltech.edu has an XKey authority of 68 out of 100, which makes it a very strong website. It ranks #393 of 133,241,980 websites by how central it is to the web's links – the top 0.01%. 20,677 different websites link to it.
Authority comes from Common Crawl's map of links between websites (July–September 2026): a site linked from many well-linked sites scores high. Google doesn't use this number, but it tracks the kind of link strength that helps pages rank. What is domain authority?
Which websites link to caltech.edu?
The 50 strongest websites linking to caltech.edu, by link strength (0–100). Select any one to see its own report.
| # | Website linking to it | Link strength |
|---|---|---|
| 1 | googleapis.com | 100 |
| 2 | google.com | 99 |
| 3 | cloudflare.com | 91 |
| 4 | apple.com | 88 |
| 5 | wikipedia.org | 88 |
| 6 | godaddy.com | 85 |
| 7 | microsoft.com | 85 |
| 8 | europa.eu | 84 |
| 9 | amazon.com | 84 |
| 10 | cloudfront.net | 84 |
| 11 | amazonaws.com | 83 |
| 12 | t.me | 83 |
| 13 | blogspot.com | 82 |
| 14 | mozilla.org | 82 |
| 15 | spotify.com | 82 |
| 16 | squarespace.com | 82 |
| 17 | github.com | 81 |
| 18 | nih.gov | 80 |
| 19 | adobe.com | 80 |
| 20 | github.io | 78 |
| 21 | list-manage.com | 78 |
| 22 | weebly.com | 78 |
| 23 | medium.com | 78 |
| 24 | archive.org | 77 |
| 25 | zoom.us | 77 |
| 26 | wikimedia.org | 77 |
| 27 | doi.org | 76 |
| 28 | wixsite.com | 76 |
| 29 | linktr.ee | 75 |
| 30 | harvard.edu | 75 |
| 31 | substack.com | 75 |
| 32 | www.gov.uk | 74 |
| 33 | outlook.com | 74 |
| 34 | w3.org | 74 |
| 35 | tinyurl.com | 74 |
| 36 | nature.com | 74 |
| 37 | hubspot.com | 73 |
| 38 | ca.gov | 73 |
| 39 | mit.edu | 72 |
| 40 | stanford.edu | 72 |
| 41 | mail.ru | 72 |
| 42 | time.com | 72 |
| 43 | epa.gov | 71 |
| 44 | prnewswire.com | 71 |
| 45 | oup.com | 71 |
| 46 | usda.gov | 71 |
| 47 | psychologytoday.com | 71 |
| 48 | ibm.com | 71 |
| 49 | sagepub.com | 71 |
| 50 | nasa.gov | 71 |
Showing the strongest 50 of 20,677. Compare caltech.edu with a competitor in the backlink checker.
When was caltech.edu registered?
caltech.edu was registered on 6 January 1986.
| Registered | 6 January 1986 |
|---|---|
| Expires | 1 January 1970 |
| Last updated | 1 January 1970 |
Straight from the domain registry. Owners' personal details are hidden by law, so to reach the owner use the website's own contact page or the registrar. Full record: WHOIS lookup.
Where is caltech.edu hosted, and what is it built with?
We check the live website when you ask, so this page stays fast.
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Link data: Common Crawl web graph, July–September 2026. Registration data: the domain registry, checked 3 November 2026. Look up another website on the website report page.