AlexaWhoisServer InformationDesktop SpeedMobile SpeedMobile UsabilityHTML ErrorsPingTraceroute

CODE.ORG Learn today, build a brighter tomorrow. | Code.org

code.org Website Information

Daily Unique Visits: 444,017

Daily Page Views: 3,552,136

Income Per Day: $3,552

Estimated Value: $3,836,160

This website is located in Sweden and is using following IP address 54.192.99.178. See the complete list of popular websites hosted in Sweden.

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

Website code.org is using the following name servers:

  • ns-1497.awsdns-59.org
  • ns-1652.awsdns-14.co.uk
  • ns-269.awsdns-33.com
  • ns-678.awsdns-20.net

and is probably hosted by AMAZON-02 - Amazon.com, Inc., US. See the full list of other websites hosted by AMAZON-02 - Amazon.com, Inc., US.

The highest website code.org position in Alexa rank database was 3228 and the lowest rank position was 3470. Current position of code.org in Alexa rank database is 3432.

Desktop speed score of code.org (83/100) is better than the results of 76.15% of other sites and shows that the page is performing great on desktop computers.

Mobile usability score of code.org (91/100) is better than the results of 32.41% of other sites and means that the page is mobile-friendly.

Mobile speed score of code.org (51/100) is better than the results of 35.73% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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code.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.

code.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: code.org
Registry Domain ID: dee566483201499f934b7140f7d08164-LROR
Registrar WHOIS Server: http://whois.registrar.amazon.com
Registrar URL: http://registrar.amazon.com
Updated Date: 2022-08-29T21:38:34Z
Creation Date: 1999-09-28T04:33:18Z
Registry Expiry Date: 2023-09-28T04:33:11Z
Registrar: Amazon Registrar, Inc.
Registrar IANA ID: 468
Registrar Abuse Contact Email: abuse@amazonaws.com
Registrar Abuse Contact Phone: +1.2067406200
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Whois Privacy Service
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: WA
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: US
Registrant Phone: REDACTED FOR PRIVACY
Registrant Phone Ext: REDACTED FOR PRIVACY
Registrant Fax: REDACTED FOR PRIVACY
Registrant Fax Ext: REDACTED FOR PRIVACY
Registrant Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Admin ID: REDACTED FOR PRIVACY
Admin Name: REDACTED FOR PRIVACY
Admin Organization: REDACTED FOR PRIVACY
Admin Street: REDACTED FOR PRIVACY
Admin City: REDACTED FOR PRIVACY
Admin State/Province: REDACTED FOR PRIVACY
Admin Postal Code: REDACTED FOR PRIVACY
Admin Country: REDACTED FOR PRIVACY
Admin Phone: REDACTED FOR PRIVACY
Admin Phone Ext: REDACTED FOR PRIVACY
Admin Fax: REDACTED FOR PRIVACY
Admin Fax Ext: REDACTED FOR PRIVACY
Admin Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Registry Tech ID: REDACTED FOR PRIVACY
Tech Name: REDACTED FOR PRIVACY
Tech Organization: REDACTED FOR PRIVACY
Tech Street: REDACTED FOR PRIVACY
Tech City: REDACTED FOR PRIVACY
Tech State/Province: REDACTED FOR PRIVACY
Tech Postal Code: REDACTED FOR PRIVACY
Tech Country: REDACTED FOR PRIVACY
Tech Phone: REDACTED FOR PRIVACY
Tech Phone Ext: REDACTED FOR PRIVACY
Tech Fax: REDACTED FOR PRIVACY
Tech Fax Ext: REDACTED FOR PRIVACY
Tech Email: Please query the RDDS service of the Registrar of Record identified in this output for information on how to contact the Registrant, Admin, or Tech contact of the queried domain name.
Name Server: ns-1497.awsdns-59.org
Name Server: ns-1652.awsdns-14.co.uk
Name Server: ns-269.awsdns-33.com
Name Server: ns-678.awsdns-20.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-09-14T16:23:51Z

code.org server information

Servers Location

code.org desktop page speed rank

Last tested: 2019-12-05

Desktop Speed Medium
83/100

code.org Desktop Speed Test Quick Summary


priority - 12Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 3 blocking script resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://cdn.optimizely.com/js/12977480133.js
https://code.org/assets/js/webpack-runtimewp2d799edb7ea8024cd301.min.js
https://code.org/assets/js/vendorswp143d1ddee74adb371f6c.min.js

priority - 5Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 50.8KiB (40% reduction).

Compressing and resizing https://code.org/images/oceans/ai-bot.png could save 29.7KiB (75% reduction).
Compressing https://code.org/shared/images/gallery/fit-750/gallery_thumbnails_2019b.jpg could save 5KiB (17% reduction).
Compressing and resizing https://code.org/images/oceans/fish-in-beam.png could save 4.9KiB (56% reduction).
Compressing https://code.org/shared/images/gallery/fit-750/gallery_thumbnails_2019a.jpg could save 3.1KiB (13% reduction).
Compressing and resizing https://code.org/images/oceans/turtle.png could save 2.6KiB (54% reduction).
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Compressing and resizing https://code.org/images/icons/medium-monogram-white.png could save 168B (28% reduction).

priority - 2Leverage 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://cdn.optimizely.com/js/12977480133.js (2 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-TZZBRK5 (15 minutes)
https://js-agent.newrelic.com/nr-1153.min.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 0Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

Enable compression for the following resources to reduce their transfer size by 284B (50% reduction).

Compressing https://code.org/js/mobile-footer.js could save 284B (50% reduction).

priority - 0Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 158B (28% reduction).

Minifying https://code.org/js/mobile-footer.js could save 158B (28% reduction).

code.org Desktop Resource Breakdown

Total Resources48
Number of Hosts11
Static Resources8
JavaScript Resources13
CSS Resources2

code.org mobile page speed rank

Last tested: 2017-05-25

Mobile Speed Bad
51/100

code.org Mobile Speed Test Quick Summary


priority - 50Optimize images

Properly formatting and compressing images can save many bytes of data.

Optimize the following images to reduce their size by 490.2KiB (27% reduction).

Compressing https://code.org/images/homepage/girl9_2x.jpg could save 252.5KiB (45% reduction).
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Compressing https://code.org/images/homepage/girl_2x.jpg could save 24.8KiB (11% reduction).
Compressing and resizing https://code.org/shared/images/play-button.png could save 4.1KiB (80% reduction).

priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 10 blocking script resources and 10 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://cdn.optimizely.com/js/400912536.js
https://code.org/js/jquery.min.js
https://code.org/shared/js/details-polyfill/jquery.details.min.js
https://code.org/shared/js/details-polyfill/details-polyfill.js
https://code.org/shared/js/angular/angular.min.js
https://code.org/shared/js/angular-route/angular-route.min.js
https://code.org/shared/js/angular-resource/angular-resource.min.js
https://code.org/shared/js/angular-sanitize/angular-sanitize.min.js
https://code.org/shared/js/ng-csv/ng-csv.min.js
https://studio.code.org/assets/js/code.org/views/t…2fb11ba0088be33b8c1.js

Optimize CSS Delivery of the following:

https://code.org/style.css
https://code.org/shared/css/user-menu.css
https://code.org/shared/css/details-polyfill.css
https://code.org/css/brstrap.css
https://code.org/css/common.css
https://code.org/shared/css/warning-banner.css
https://code.org/css/homepage.css
https://code.org/shared/css/user-hero.css
https://code.org/shared/css/buttons.css
https://code.org/shared/css/hamburger.css

priority - 3Leverage 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://cdn.optimizely.com/js/400912536.js (2.1 minutes)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://js-agent.newrelic.com/nr-1026.min.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 1Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

Minify JavaScript for the following resources to reduce their size by 4.4KiB (62% reduction).

Minifying https://code.org/js/fastclick.js could save 4.4KiB (62% reduction) after compression.

priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 3KiB (15% reduction).

Minifying https://code.org/ could save 3KiB (15% reduction) after compression.

code.org Mobile Resource Breakdown

Total Resources67
Number of Hosts14
Static Resources12
JavaScript Resources25
CSS Resources12

code.org mobile page usability

Last tested: 2017-05-25

Mobile Usability Good
91/100

code.org Mobile Usability Test Quick Summary


priority - 9Size 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 <button>I agree ▾</button> is close to 1 other tap targets.

The tap target <a href="http://en.wiki…iki/Bill_Gates">Bill Gates,</a> and 24 others are close to other tap targets.
The tap target <a href="https://www.fa…k.com/Code.org" class="social-icon"></a> and 3 others are close to other tap targets.
The tap target <a href="https://www.fa…k.com/Code.org" class="social-icon"></a> and 5 others are close to other tap targets.

code.org HTML validation

Errors

Bad value “none” for attribute “media” on element “link”: Media query ended prematurely.

Line: 77 Column: 1 - 111
"...</script> <link href="/css/fonts.css" media="none" onload="if(media!='all')media='all'" rel="stylesheet" type="text/css"> <..."

CSS: Parse Error.

Line: 84 Column: - 149
"...ize-adjust:100%}body{margin:0}..."

CSS: “writing-mode”: “lr-tb” is not a “writing-mode” value.

Line: 87 Column: 4694 - 4698
"...ting-mode:lr-tb}.btn-..." Line: 87 Column: 7549 - 7553
"...ting-mode:lr-tb} </s..."

Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)

Line: 197 Column: 1 - 7
"...d> <body> <style> #wa..." Line: 1444 Column: 1 - 7
"...v> </div> <style> .mo..."

Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)

Line: 209 Column: 1 - 7
"...erClass"> <style> a.u..." Line: 217 Column: 1 - 7
"...llwidth"> <style> #pa..." Line: 221 Column: 1 - 7
"...</style> <style> #pa..." Line: 629 Column: 1 - 7
"...cript> <style> @ke..." Line: 1024 Column: 1 - 7
"...v> </div> <style> .mo..." Line: 1211 Column: 1 - 7
"...feature"> <style> #fo..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 232 Column: 1 - 38
"...gnedout"> <img id="logo" src="/images/logo.png"> </a> ..." Line: 255 Column: 1 - 64
"...lab/new"> <img src="/shared/images/fill-70x70/courses/logo_spritelab.png"> <div ..." Line: 261 Column: 1 - 61
"...ist/new"> <img src="/shared/images/fill-70x70/courses/logo_artist.png"> <div ..." Line: 267 Column: 1 - 68
"...lab/new"> <img src="/shared/images/fill-70x70/courses/logo_applab_square.png"> <div ..." Line: 273 Column: 1 - 69
"...lab/new"> <img src="/shared/images/fill-70x70/courses/logo_gamelab_square.png"> <div ..." Line: 279 Column: 1 - 60
"...nce/new"> <img src="/shared/images/fill-70x70/courses/logo_dance.png"> <div ..." Line: 536 Column: 1 - 73
"...ideo();"> <img class="video-play-icon" src="/shared/images/fit-48/play-button.png"> <span..." Line: 638 Column: 1 - 66
"..."banner"> <img src="/images/homepage/professional-learning-2018-banner.png"> <div ..." Line: 835 Column: 1 - 125
"...helinks"> <img class="col-50 lazyload" data-src="/shared/images/gallery/fit-750/gallery_thumbnails_2019a.jpg" height="120" width="750"> <img ..." Line: 836 Column: 1 - 125
"...th="750"> <img class="col-50 lazyload" data-src="/shared/images/gallery/fit-750/gallery_thumbnails_2019b.jpg" height="120" width="750"> </div..." Line: 969 Column: 1 - 75
"...lative;"> <img src="/images/16x9.png" style="display:block; width:100%; height:auto"> <div ..." Line: 1015 Column: 1 - 91
"...ach.mp4"> <img height="44" src="/images/fit-44x44/download.png" style="padding-top: 5px;" width="44"> </a> ..." Line: 1201 Column: 1 - 71
"..."_blank"> <img src="/images/icons/medium-monogram-white.png" style="width: 20px"> </a> ..." Line: 1339 Column: 1 - 71
"..."_blank"> <img src="/images/icons/medium-monogram-white.png" style="width: 20px"> </a> ..." Line: 1361 Column: 1 - 110
"...</button> <img class="lazyload" data-src="/images/fit-320/avatars/flag_sphere.png" style="width: 256px; height: 256px;"> </div..."

Duplicate ID “clear”.

Line: 521 Column: 1 - 35
"...v> </div> <div id="clear" style="clear:both"></div>..."

The element “button” must not appear as a descendant of the “a” element.

Line: 531 Column: 1 - 30
"...ero-hoc"> <button class="herohocbutton">Start ..." Line: 647 Column: 1 - 8
"... col-20"> <button> Join ..." Line: 658 Column: 1 - 8
"...n. </div> <button> Join ..." Line: 1008 Column: 200 - 256
"...ay: none"><button class="button-color-share share-button-facebook"><i cla..." Line: 1009 Column: 274 - 329
"...ay: none"><button class="button-color-share share-button-twitter"><i cla..."

Element “img” is missing required attribute “src”.

Line: 835 Column: 1 - 125
"...helinks"> <img class="col-50 lazyload" data-src="/shared/images/gallery/fit-750/gallery_thumbnails_2019a.jpg" height="120" width="750"> <img ..." Line: 836 Column: 1 - 125
"...th="750"> <img class="col-50 lazyload" data-src="/shared/images/gallery/fit-750/gallery_thumbnails_2019b.jpg" height="120" width="750"> </div..." Line: 1361 Column: 1 - 110
"...</button> <img class="lazyload" data-src="/images/fit-320/avatars/flag_sphere.png" style="width: 256px; height: 256px;"> </div..."

Duplicate ID “support”.

Line: 1102 Column: 1 - 88
"...   </div> <a class="whitefooterlink" href="http://support.code.org/" id="support" target="_blank">Suppor..." Line: 1238 Column: 1 - 65
".../li> <li> <a href="https://support.code.org/" id="support" target="_blank">Suppor..."

Duplicate ID “pagefooter”.

Line: 1216 Column: 1 - 24
"...</script> <footer id="pagefooter"> <div ..."

Attribute “width” not allowed on element “div” at this point.

Line: 1354 Column: 1 - 40
"...anguage"> <div class="modal-dialog" width="500px"> <div ..."

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Line: 96 Column: 1 - 126
".../style> <meta content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=no" name="viewport"> <styl..."

The “type” attribute is unnecessary for JavaScript resources.

Line: 107 Column: 1 - 31
"...atible"> <script type="text/javascript">window..." Line: 108 Column: 1 - 31
"...</script> <script type="text/javascript">(windo..." Line: 1352 Column: 1 - 64
"... </div> <script defer src="/js/bootstrap.min.js" type="text/javascript"></scri..."

The first occurrence of ID “clear” was here.

Line: 515 Column: 1 - 35
"...v> </div> <div id="clear" style="clear:both"></div>..."

The first occurrence of ID “support” was here.

Line: 414 Column: 1 - 64
"...s="item"> <a href="https://support.code.org" id="support" target="_blank">Help a..." Line: 414 Column: 1 - 64
"...s="item"> <a href="https://support.code.org" id="support" target="_blank">Help a..."

The first occurrence of ID “pagefooter” was here.

Line: 1087 Column: 1 - 24
"...feature"> <footer id="pagefooter"> <div ..."

Consider adding a “lang” attribute to the “html” start tag to declare the language of this document.

Line: 2 Column: 16 - 6
"...TYPE html> <html> <head..."

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code.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.

code.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.