KHANACADEMY.ORG Khan Academy

khanacademy.org Website Information

Daily Unique Visits: 2,775,713

Daily Page Views: 22,205,704

Income Per Day: $22,206

Estimated Value: $23,982,480

This website is located in United States and is using following IP address 23.23.224.106. See the complete list of popular websites hosted in United States.

khanacademy.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.

Website khanacademy.org is using the following name servers:

  • ns-1489.awsdns-58.org
  • ns-798.awsdns-35.net
  • ns-125.awsdns-15.com
  • ns-1664.awsdns-16.co.uk

and is probably hosted by AMAZON-AES - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-AES - Amazon.com, Inc., US.

The highest website khanacademy.org position in Alexa rank database was 225 and the lowest rank position was 2041. Current position of khanacademy.org in Alexa rank database is 549.

Desktop speed score of khanacademy.org (85/100) is better than the results of 83.24% of other sites and shows that the page is performing great on desktop computers.

Mobile usability score of khanacademy.org (84/100) is better than the results of 40.98% of other sites and means that the page is mobile-friendly.

Mobile speed score of khanacademy.org (67/100) is better than the results of 71.47% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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khanacademy.org Alexa Rank

The traffic rank is based on three months of aggregated historical traffic data from millions of Alexa Toolbar users and is a combined measure of page views and users.


khanacademy.org whois

WHOIS gives you the ability to lookup any generic domains to find out the registered domain holder. WHOIS database are provided for information purposes only. It allows the public to check whether a specific domain name is still available or not and to obtain information related to the registration records of existing domain names.


Domain Name: KHANACADEMY.ORG
Domain ID: D118495620-LROR
WHOIS Server:
Referral URL: http://www.godaddy.com
Updated Date: 2014-04-29T00:20:30Z
Creation Date: 2006-03-14T22:24:02Z
Registry Expiry Date: 2019-03-14T22:24:02Z
Sponsoring Registrar: GoDaddy.com, LLC
Sponsoring Registrar IANA ID: 146
Domain Status: clientDeleteProhibited https://www.icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://www.icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://www.icann.org/epp#clientTransferProhibited
Domain Status: clientUpdateProhibited https://www.icann.org/epp#clientUpdateProhibited
Registrant ID: CR162039678
Registrant Name: Shantanu Sinha
Registrant Organization: Khan Academy
Registrant Street: PO Box 1630
Registrant City: Mountain View
Registrant State/Province: California
Registrant Postal Code: 94042
Registrant Country: US
Registrant Phone: +1.6503365426
Registrant Phone Ext:
Registrant Fax:
Registrant Fax Ext:
Registrant Email: bills@KHANACADEMY.ORG
Admin ID: CR162039679
Admin Name: Shantanu Sinha
Admin Organization: Khan Academy
Admin Street: PO Box 1630
Admin City: Mountain View
Admin State/Province: California
Admin Postal Code: 94042
Admin Country: US
Admin Phone: +1.6503365426
Admin Phone Ext:
Admin Fax:
Admin Fax Ext:
Admin Email: bills@KHANACADEMY.ORG
Tech ID: CR162039681
Tech Name: Shantanu Sinha
Tech Organization: Khan Academy
Tech Street: PO Box 1630
Tech City: Mountain View
Tech State/Province: California
Tech Postal Code: 94042
Tech Country: US
Tech Phone: +1.6503365426
Tech Phone Ext:
Tech Fax:
Tech Fax Ext:
Tech Email: bills@KHANACADEMY.ORG
Name Server: NS-1489.AWSDNS-58.ORG
Name Server: NS-125.AWSDNS-15.COM
Name Server: NS-1664.AWSDNS-16.CO.UK
Name Server: NS-798.AWSDNS-35.NET
DNSSEC: unsigned
>>> Last update of WHOIS database: 2016-03-30T17:39:04Z

khanacademy.org server information

Servers Location

khanacademy.org desktop page speed rank

Last tested: 2016-06-12


Desktop Speed Good
85/100

khanacademy.org Desktop Speed Test Quick Summary


priority - 10 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 4 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

https://cdn.kastatic.org/genfiles/stylesheets/en/h…age-package-6aba2b.css
https://cdn.kastatic.org/genfiles/stylesheets/en/mobile-package-9eea13.css
https://cdn.kastatic.org/genfiles/stylesheets/en/z…ing-package-1d68df.css
https://cdn.kastatic.org/genfiles/stylesheets/en/login-package-7ada98.css

priority - 6 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://ak.sail-horizon.com/horizon/v1.js (expiration not specified)
https://connect.facebook.net/en/sdk.js (20 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://cdn.kastatic.org/images/homepage/background-learner.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/background-parent.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/background-teacher.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/homepage-…ground-placeholder.png (60 minutes)
https://cdn.kastatic.org/images/homepage/ycla-hashtag-en.png (60 minutes)
https://cdn.kastatic.org/images/homepage/ycla-scrawl-en.png (60 minutes)
https://cdn.kastatic.org/images/khan-logo-vertical-transparent.png (60 minutes)
https://s3.amazonaws.com/ki.js/53782/bH0.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 0 Reduce server response time

khanacademy.org Desktop Resource Breakdown

Total Resources38
Number of Hosts9
Static Resources33
JavaScript Resources19
CSS Resources4

khanacademy.org mobile page speed rank

Last tested: 2016-06-12


Mobile Speed Medium
67/100

khanacademy.org Mobile Speed Test Quick Summary


priority - 40 Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 4 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

https://cdn.kastatic.org/genfiles/stylesheets/en/h…age-package-6aba2b.css
https://cdn.kastatic.org/genfiles/stylesheets/en/mobile-package-9eea13.css
https://cdn.kastatic.org/genfiles/stylesheets/en/z…ing-package-1d68df.css
https://cdn.kastatic.org/genfiles/stylesheets/en/login-package-7ada98.css

priority - 9 Leverage browser caching

Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.

Leverage browser caching for the following cacheable resources:

https://ak.sail-horizon.com/horizon/v1.js (expiration not specified)
https://connect.facebook.net/en/sdk.js (20 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://cdn.kastatic.org/images/homepage/background-learner.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/background-parent.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/background-teacher.jpg (60 minutes)
https://cdn.kastatic.org/images/homepage/homepage-…ground-placeholder.png (60 minutes)
https://cdn.kastatic.org/images/homepage/ycla-hashtag-en.png (60 minutes)
https://cdn.kastatic.org/images/homepage/ycla-scrawl-en.png (60 minutes)
https://cdn.kastatic.org/images/khan-logo-vertical-transparent.png (60 minutes)
https://s3.amazonaws.com/ki.js/53782/bH0.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 0 Reduce server response time

khanacademy.org Mobile Resource Breakdown

Total Resources38
Number of Hosts9
Static Resources33
JavaScript Resources19
CSS Resources4

khanacademy.org mobile page usability

Last tested: 2016-06-12


Mobile Usability Medium
84/100

khanacademy.org Mobile Usability Test Quick Summary


priority - 17 Size tap targets appropriately

Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.

The following tap targets are close to other nearby tap targets and may need additional spacing around them.

The tap target <a href="/math/early-math" class="subject-cell s…pure-u-md-1-3">Early math</a> and 42 others are close to other tap targets.

The tap target <a href="/math/k-8-grades" class="domain-title">Math by grade</a> is close to 2 other tap targets.

The tap target <a href="/computing" class="domain-title">Computing</a> is close to 1 other tap targets.
The tap target <a href="/library">even…more</a> is close to 1 other tap targets.
The tap target <a href="/about" class="a_4133r1">Our Mission</a> and 22 others are close to other tap targets.

The tap target <a href="/math/arithmetic/fractions" class="a_4133r1-o_O-topicLink_l2xkeq">Get free help…n Khan Academy</a> is close to 2 other tap targets.

khanacademy.org Mobile Resource Breakdown

Total Resources38
Number of Hosts9
Static Resources33
JavaScript Resources19
CSS Resources4

khanacademy.org HTML validation

Errors

Attribute “xmlns:mml” not allowed here.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Attribute “xmlns:og” not allowed here.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Attribute “xmlns:fb” not allowed here.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Bad value “og: http://ogp.me/ns# khanacademy: http://ogp.me/ns/apps/khanacademy#” for attribute “prefix” on element “head”.

Line: 24 Column: 54 - 60
"...8/fbml" > <head prefix="og: http://ogp.me/ns# khanacademy: http://ogp.me/ns/apps/khanacademy#"> ..."

A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.

Line: 145 Column: 9 - 142
"... <link rel="apple-touch-icon-precomposed" sizes="57x57" href="https://cdn.kastatic.org/images/apple-touch-icon-57x57-precomposed.png"/> ..." Line: 146 Column: 9 - 142
"...> <link rel="apple-touch-icon-precomposed" sizes="72x72" href="https://cdn.kastatic.org/images/apple-touch-icon-72x72-precomposed.png"/> ..." Line: 147 Column: 9 - 146
"...> <link rel="apple-touch-icon-precomposed" sizes="114x114" href="https://cdn.kastatic.org/images/apple-touch-icon-114x114-precomposed.png"/> ..." Line: 148 Column: 9 - 146
"...> <link rel="apple-touch-icon-precomposed" sizes="144x144" href="https://cdn.kastatic.org/images/apple-touch-icon-144x144-precomposed.png"/> ..."

Warnings

Attribute with the local name “xmlns:mml” is not serializable as XML 1.0.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.

Line: 22 Column: 4 - 53
"....js"); --> <html lang="en" itemscope itemtype="http://schema.org/Organization" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:og="http://opengraphprotocol.org/schema/" xmlns:fb="http://www.facebook.com/2008/fbml" > ..."

Consider avoiding viewport values that prevent users from resizing documents.

Line: 93 Column: 17 - 105
"... <meta name="viewport" content="width=device-width, initial-scale=1.0, maximum-scale=1.0"> ..."

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khanacademy.org Ping

Ping is a computer network administration software utility used to test the reachability of a host on an Internet Protocol (IP) network. It measures the round-trip time for messages sent from the originating host to a destination computer that are echoed back to the source.


khanacademy.org TRACEROUTE

Traceroute is a computer network diagnostic tool for displaying the route (path) and measuring transit delays of packets across an Internet Protocol (IP) network. The history of the route is recorded as the round-trip times of the packets received from each successive host (remote node) in the route (path); the sum of the mean times in each hop is a measure of the total time spent to establish the connection. Traceroute proceeds unless all (three) sent packets are lost more than twice, then the connection is lost and the route cannot be evaluated.