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stackoverflow.com Website Information

Daily Unique Visits: 42,329,618

Daily Page Views: 338,636,944

Income Per Day: $338,637

Estimated Value: $365,727,960

This website is located in United States and is using following IP address 151.101.193.69. See the complete list of popular websites hosted in United States.

stackoverflow.com is registered under .COM top-level domain. Please check other sites in .COM zone.

Website stackoverflow.com is using the following name servers:

  • ns-358.awsdns-44.com
  • ns-1033.awsdns-01.org
  • ns-cloud-e1.googledomains.com
  • ns-cloud-e2.googledomains.com

and is probably hosted by FASTLY - Fastly, US. See the full list of other websites hosted by FASTLY - Fastly, US.

The highest website stackoverflow.com position in Alexa rank database was 33 and the lowest rank position was 86. Current position of stackoverflow.com in Alexa rank database is 36.

Desktop speed score of stackoverflow.com (86/100) is better than the results of 85.22% of other sites and shows that the page is performing great on desktop computers.

Mobile usability score of stackoverflow.com (67/100) is better than the results of 32.54% of other sites and means that the page is not mobile-friendly.

Mobile speed score of stackoverflow.com (66/100) is better than the results of 69.16% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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stackoverflow.com 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.


stackoverflow.com 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: STACKOVERFLOW.COM
Registry Domain ID: 108907621_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.name.com
Registrar URL: http://www.name.com
Updated Date: 2019-01-11T17:52:14Z
Creation Date: 2003-12-26T19:18:07Z
Registry Expiry Date: 2020-02-02T11:59:59Z
Registrar: Name.com, Inc.
Registrar IANA ID: 625
Registrar Abuse Contact Email: abuse@name.com
Registrar Abuse Contact Phone: 7202492374
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
Name Server: NS-1033.AWSDNS-01.ORG
Name Server: NS-358.AWSDNS-44.COM
Name Server: NS-CLOUD-E1.GOOGLEDOMAINS.COM
Name Server: NS-CLOUD-E2.GOOGLEDOMAINS.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2019-09-02T23:15:13Z

stackoverflow.com server information

Servers Location

stackoverflow.com desktop page speed rank

Last tested: 2019-09-02


Desktop Speed Good
86/100

stackoverflow.com Desktop Speed Test Quick Summary


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

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priority - 0 Leverage browser caching

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stackoverflow.com Desktop Resource Breakdown

Total Resources51
Number of Hosts9
Static Resources41
JavaScript Resources8
CSS Resources4

stackoverflow.com mobile page speed rank

Last tested: 2019-09-02


Mobile Speed Medium
66/100

stackoverflow.com Mobile Speed Test Quick Summary


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

Your page has 1 blocking script resources and 4 blocking CSS resources. This causes a delay in rendering your page.

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https://cdn.sstatic.net/Js/stub.en.js?v=039a4c28b778

Optimize CSS Delivery of the following:

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https://cdn.sstatic.net/Shared/Product/product.css?v=64858b04d269
https://cdn.sstatic.net/Shared/Channels/channels.css?v=3cb22f54cd88

priority - 5 Enable compression

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priority - 1 Leverage browser caching

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Leverage browser caching for the following cacheable resources:

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stackoverflow.com Mobile Resource Breakdown

Total Resources51
Number of Hosts9
Static Resources41
JavaScript Resources8
CSS Resources4

stackoverflow.com mobile page usability

Last tested: 2019-09-02


Mobile Usability Medium
67/100

stackoverflow.com Mobile Usability Test Quick Summary


priority - 50 Size content to viewport

The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.

The page content is 1,100 CSS pixels wide, but the viewport is only 412 CSS pixels wide. The following elements fall outside the viewport:

The element <span class="ff-mono">&lt;3</span> falls outside the viewport.
The element <p class="fs-title ta-ce…4 mx-auto mb24">We build produ…and discovery.</p> falls outside the viewport.
The element <a href="#for-developers" class="grid--cell bc-…k js-gps-track">For developers</a> falls outside the viewport.
The element <a href="#for-businesses" class="grid--cell ml8…k js-gps-track">For businesses</a> falls outside the viewport.
The element <h2 class="w90 mx-auto p-…headline2 mb24">For developers, by developers</h2> falls outside the viewport.
The element <div class="p-divider mb32"> falls outside the viewport.
The element <a href="/questions" class="fc-orange-400 js-gps-track">open community</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=d82acaa7df9f" class="mb16"> falls outside the viewport.
The element <h4 class="fs-title p-ff-roboto-slab mb16">Public Q&amp;A</h4> falls outside the viewport.
The element <a href="/users/signup" class="fc-orange-400 js-gps-track">Sign up</a> falls outside the viewport.
The element <a href="/questions" class="d-inline-block…m js-gps-track">Browse questions</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=2c1de180b6d7" class="mb16"> falls outside the viewport.
The element <h4 class="fs-title p-ff-roboto-slab mb16">Private Q&amp;A</h4> falls outside the viewport.
The element <p class="mb24">Level up with…ip Q&amp;A engine.</p> falls outside the viewport.
The element <a href="/teams" class="d-inline-block…m js-gps-track">Learn more</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=931d6c0863ee" class="mb16"> falls outside the viewport.
The element <h4 class="fs-title p-ff-roboto-slab mb16">Browse jobs</h4> falls outside the viewport.
The element <p class="mb24">Find the right…ion, and more.</p> falls outside the viewport.
The element <a href="/jobs" class="d-inline-block…m js-gps-track">Find a job</a> falls outside the viewport.
The element <h2 class="mx-auto w90 ta…headline2 mb24">For businesses, by developers</h2> falls outside the viewport.
The element <div class="p-divider mb32"> falls outside the viewport.
The element <p class="ta-center mb64…0 wmx6 mx-auto">Our mission is…k effectively.</p> falls outside the viewport.
The element <img src="https://cdn.ss…v=a4f1cfb08f7e" class="d-block"> falls outside the viewport.
The element <a href="/teams" class="fc-orange-400 js-gps-track">Private Q&amp;A</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=9099aa106ad3" class="d-block"> falls outside the viewport.
The element <a href="https://www.st…ess.com/talent" class="fc-orange-400 js-gps-track">Talent solutions</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=9d4c2786ff02" class="d-block"> falls outside the viewport.
The element <a href="https://www.st…om/advertising" class="fc-orange-400 js-gps-track">Advertising platform</a> falls outside the viewport.
The element <h2 class="w90 wmx5 mx-au…headline2 mb24">Unlock siloed…flow for Teams</h2> falls outside the viewport.
The element <div class="p-divider mb32"> falls outside the viewport.
The element <p class="mb24 w90 mx-au…white fs-body3">Wikis, chat me…in less time.</p> falls outside the viewport.
The element <a href="/teams" class="fs-body2 d-inl…m js-gps-track">Learn more</a> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…d fs-title mb8">Basic</h4> falls outside the viewport.
The element <p class="mb0 fs-body2">Private Q&amp;A for teams</p> falls outside the viewport.
The element <div class="grid--cell p-f…-headline2 mr8">$5</div> falls outside the viewport.
The element <p class="m0">Per user / month</p> falls outside the viewport.
The element <p class="m0">billed annually</p> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Free 14 day trial</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">A single team…ckoverflow.com</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Unlimited priv…ns and answers</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Searchable archive</div> falls outside the viewport.
The element <a href="/teams" class="fs-body2 py12…e js-gps-track">Create your team</a> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…d fs-title mb8">Business</h4> falls outside the viewport.
The element <p class="mb0 fs-body2">Private Q&amp;A wi…e organization</p> falls outside the viewport.
The element <div class="grid--cell p-f…-headline2 mr8">$11</div> falls outside the viewport.
The element <p class="m0">Per user / month</p> falls outside the viewport.
The element <p class="m0">billed annually</p> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">All the features of Basic</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Single Sign-On…SO), with SAML</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Invoicing</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Reporting and Analytics</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Priority customer support</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">99.5% uptime</div> falls outside the viewport.
The element <a href="/business/get-started" class="fs-body2 py12…e js-gps-track">Request a demo</a> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…d fs-title mb8">Enterprise</h4> falls outside the viewport.
The element <p class="mb0 fs-body2">Your own stand…osting options</p> falls outside the viewport.
The element <div class="grid--cell p-f…-headline2 mr8">$17</div> falls outside the viewport.
The element <p class="m0">Per user / month</p> falls outside the viewport.
The element <p class="m0">billed annually</p> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">All the featur…c and Business</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Host on your c…private cloud</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Single Sign-On: AD, SAML</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Robust Read and Write API</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Dedicated Cust…unity Building</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">99.5% uptime</div> falls outside the viewport.
The element <path> falls outside the viewport.
The element <div class="grid--cell">Customized The…and Privileges</div> falls outside the viewport.
The element <a href="/enterprise/get-started" class="fs-body2 py12…e js-gps-track">Request a demo</a> falls outside the viewport.
The element <div class="grid--cell"></div> falls outside the viewport.
The element <h4 class="grid--cell p-f…headline1 mb12">Hire your technical talent</h4> falls outside the viewport.
The element <p class="grid--cell fs-body2 mb24">We help expand…thly visitors.</p> falls outside the viewport.
The element <div class="grid--cell mt-auto">Stack Overflow Talent</div> falls outside the viewport.
The element <div class="grid--cell"></div> falls outside the viewport.
The element <h4 class="grid--cell p-f…headline1 mb12">Reach developers worldwide</h4> falls outside the viewport.
The element <p class="grid--cell fs-body2 mb24">Use the world’…of Q&amp;A sites.</p> falls outside the viewport.
The element <div class="grid--cell mt-auto">Stack Overflow Advertising</div> falls outside the viewport.
The element <h3 class="w90 mx-auto ta…headline2 mb24">Questions are…Stack Overflow</h3> falls outside the viewport.
The element <div class="p-divider mb32"> falls outside the viewport.
The element <img src="https://cdn.ss…v=989b3861569f" class="d-block"> falls outside the viewport.
The element <span class="grid--cell">Vote on everything</span> falls outside the viewport.
The element <img src="https://cdn.ss…v=801dab051d61" class="d-block"> falls outside the viewport.
The element <span class="grid--cell">Answer questions</span> falls outside the viewport.
The element <img src="https://cdn.ss…v=4e52852c80b1" class="d-block"> falls outside the viewport.
The element <span class="grid--cell">Accept an answer</span> falls outside the viewport.
The element <img src="https://cdn.ss…v=934301e7c620" class="d-block"> falls outside the viewport.
The element <span class="grid--cell">Get recognized</span> falls outside the viewport.
The element <img src="https://cdn.ss…v=8d9bf76769f6" class="d-block wmx100"> falls outside the viewport.
The element <h4 class="mt24 p-ff-roboto-slab fs-title">Upvoting helps…ful responses.</h4> falls outside the viewport.
The element <a href="/users/signup" class="mt24 fs-body2…m js-gps-track">Create an account</a> falls outside the viewport.
The element <h3 class="w90 mx-auto ta…headline2 mb24">Learn and grow…Stack Overflow</h3> falls outside the viewport.
The element <div class="p-divider mb64"> falls outside the viewport.
The element <img src="https://cdn.ss…v=cd5e5a0ec97c" class="mb16 wmx100"> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…ubheading mb16">Write the script of the future</h4> falls outside the viewport.
The element <a href="questions/tagged/javascript" class="js-gps-track">JavaScript</a> falls outside the viewport.
The element <a href="questions/tagged/react" class="js-gps-track">React</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=e025bc1244c8" class="mb16 wmx100"> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…ubheading mb16">Support open source</h4> falls outside the viewport.
The element <a href="https://stacko…85729#55885729" class="js-gps-track">Read the curl…reator’s story</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=a91ad6d1a9bd" class="mb16 wmx100"> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…ubheading mb16">Acquire and share knowledge</h4> falls outside the viewport.
The element <a href="https://insigh…koverflow.com/" class="js-gps-track">gain insights</a> falls outside the viewport.
The element <img src="https://cdn.ss…v=b42e46ffdac0" class="mb16 wmx100"> falls outside the viewport.
The element <h4 class="p-ff-roboto-sl…ubheading mb16">Find career opportunities</h4> falls outside the viewport.
The element <a href="users/story/join" class="js-gps-track">Developer Story</a> falls outside the viewport.
The element <h3 class="mx-auto w90 wm…4 lg:ta-center">Looking for a job?</h3> falls outside the viewport.
The element <img src="https://cdn.ss…v=42f011c01763"> falls outside the viewport.
The element <div class="grid--cell">Browse jobs by technology</div> falls outside the viewport.
The element <img src="https://cdn.ss…v=401840ff8931"> falls outside the viewport.
The element <div class="grid--cell">Browse jobs by salary</div> falls outside the viewport.
The element <img src="https://cdn.ss…v=1f3acc6dc772"> falls outside the viewport.
The element <div class="grid--cell">Browse jobs by…sa sponsorship</div> falls outside the viewport.
The element <img src="https://cdn.ss…v=a4b4d1b5a80c"> falls outside the viewport.
The element <div class="grid--cell">Browse remote-friendly jobs</div> falls outside the viewport.
The element <a href="/jobs" class="grid--cell ml3…m js-gps-track">View all jobs</a> falls outside the viewport.
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The element <a href="https://stacko…/company/about" class="js-gps-track">Company</a> falls outside the viewport.
The element <li class="-item">About</li> falls outside the viewport.
The element <li class="-item">Press</li> falls outside the viewport.
The element <a href="https://stacko…pany/work-here" class="js-gps-track -link">Work Here</a> falls outside the viewport.
The element <li class="-item">Legal</li> falls outside the viewport.
The element <a href="https://stacko…privacy-policy" class="js-gps-track -link">Privacy Policy</a> falls outside the viewport.
The element <a href="https://stacko…ompany/contact" class="js-gps-track -link">Contact Us</a> falls outside the viewport.
The element <br> falls outside the viewport.
The element <a href="#" class="-link _expanda…r js-gps-track">Technology</a> falls outside the viewport.
The element <a href="#" class="-link _expanda…r js-gps-track">Life / Arts</a> falls outside the viewport.
The element <a href="#" class="-link _expanda…r js-gps-track">Culture / Recreation</a> falls outside the viewport.
The element <a href="#" class="-link _expanda…r js-gps-track">Science</a> falls outside the viewport.
The element <a href="#" class="-link _expanda…r js-gps-track">Other</a> falls outside the viewport.
The element <a href="https://stacko…low.blog?blb=1" class="js-gps-track -link">Blog</a> falls outside the viewport.
The element <a href="https://www.fa…stackoverflow/" class="-link js-gps-track">Facebook</a> falls outside the viewport.
The element <a href="https://twitte…/stackoverflow" class="-link js-gps-track">Twitter</a> falls outside the viewport.
The element <a href="https://linked…stack-overflow" class="-link js-gps-track">LinkedIn</a> falls outside the viewport.
The element <a href="https://creati…ses/by-sa/3.0/" class="js-gps-track">cc by-sa 3.0</a> falls outside the viewport.
The element <a href="https://stacko…tion-required/" class="js-gps-track">attribution required</a> falls outside the viewport.
The element <span id="svnrev">rev 2019.9.2.34767</span> falls outside the viewport.

priority - 1 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="/questions" class="js-gps-track -link">Questions</a> and 15 others are close to other tap targets.

stackoverflow.com Mobile Resource Breakdown

Total Resources51
Number of Hosts9
Static Resources41
JavaScript Resources8
CSS Resources4

stackoverflow.com HTML validation

Errors

Attribute “itemprop” not allowed on element “meta” at this point.

Line: 15 Column: 5 - 164
"...."/> <meta property="og:image" itemprop="image primaryImageOfPage" content="https://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded" /> ..." Line: 16 Column: 5 - 153
"...d" /> <meta name="twitter:title" property="og:title" itemprop="title name" content="Stack Overflow - Where Developers Learn, Share, &amp; Build Careers" /> <..." Line: 17 Column: 5 - 167
"...s" /> <meta name="twitter:description" property="og:description" itemprop="description" content="Stack Overflow | The World’s Largest Online Community for Developers" /> <..."

The “itemprop” attribute was specified, but the element is not a property of any item.

Line: 15 Column: 5 - 164
"...."/> <meta property="og:image" itemprop="image primaryImageOfPage" content="https://cdn.sstatic.net/Sites/stackoverflow/img/apple-touch-icon@2.png?v=73d79a89bded" /> <..." Line: 16 Column: 5 - 153
"...d" /> <meta name="twitter:title" property="og:title" itemprop="title name" content="Stack Overflow - Where Developers Learn, Share, &amp; Build Careers" /> <..." Line: 17 Column: 5 - 167
"...s" /> <meta name="twitter:description" property="og:description" itemprop="description" content="Stack Overflow | The World’s Largest Online Community for Developers" /> <..."

Warnings

The “navigation” role is unnecessary for element “nav”.

Line: 67 Column: 17 - 87
"... <nav class="navigation" role="navigation" aria-label="site navigation"> ..."

The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.

Line: 334 Column: 100 - 201
"...ee to the <a href='https://stackexchange.com/legal/privacy-policy' name='privacy' target='_blank' class='-link'>privac..." Line: 334 Column: 225 - 324
"...y</a> and <a href='https://stackexchange.com/legal/terms-of-service' name='tos' target='_blank' class='-link'>terms ..."

The “contentinfo” role is unnecessary for element “footer”.

Line: 3501 Column: 5 - 70
"...div> <footer id="footer" class="s-footer js-footer" role="contentinfo"> ..."

This document appears to be written in Afrikaans. Consider adding “lang="af"” (or variant) to the “html” start tag.

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

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stackoverflow.com 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.


stackoverflow.com 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.