AlexaWhoisServer InformationDesktop SpeedMobile SpeedMobile UsabilityHTML ErrorsPingTraceroute

TERATAIL.COM teratail【テラテイル】｜ITエンジニア特化型Q&Aサイト

teratail.com Website Information

Daily Unique Visits: 21,594

Daily Page Views: 129,564

Income Per Day: $259

Estimated Value: $186,480

This website is located in United States and is using following IP address 57.180.210.215. See the complete list of popular websites hosted in United States.

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

Website teratail.com is using the following name servers:

  • ns-1043.awsdns-02.org
  • ns-1877.awsdns-42.co.uk
  • ns-7.awsdns-00.com
  • ns-872.awsdns-45.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 teratail.com position in Alexa rank database was 60033 and the lowest rank position was 149395. Current position of teratail.com in Alexa rank database is 66417.

Desktop speed score of teratail.com (54/100) is better than the results of 28.19% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of teratail.com (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.

Mobile speed score of teratail.com (42/100) is better than the results of 21.5% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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teratail.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.

teratail.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: TERATAIL.COM
Registry Domain ID: 1830422028_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.jprs.jp
Registrar URL: http://jprs.jp/registrar/
Updated Date: 2024-08-27T18:15:03Z
Creation Date: 2013-10-09T01:13:12Z
Registry Expiry Date: 2025-10-09T01:13:12Z
Registrar: Japan Registry Services Co., Ltd.
Registrar IANA ID: 1485
Registrar Abuse Contact Email: gtld-abuse@jprs.jp
Registrar Abuse Contact Phone: +81.352158457
Domain Status: ok https://icann.org/epp#ok
Name Server: NS-1043.AWSDNS-02.ORG
Name Server: NS-1877.AWSDNS-42.CO.UK
Name Server: NS-7.AWSDNS-00.COM
Name Server: NS-872.AWSDNS-45.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-20T18:03:39Z

teratail.com server information

Servers Location

teratail.com desktop page speed rank

Last tested: 2016-11-07

Desktop Speed Bad
54/100

teratail.com Desktop Speed Test Quick Summary


priority - 38Enable compression

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Enable compression for the following resources to reduce their transfer size by 373.1KiB (69% reduction).

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priority - 34Leverage 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://b92.yahoo.co.jp/js/s_retargeting.js (expiration not specified)
https://static.ads-twitter.com/uwt.js (expiration not specified)
https://teratail.com/img/common/bkgSitenavArrow_white.png (expiration not specified)
https://teratail.com/img/common/icn_honor.png (expiration not specified)
https://teratail.com/img/common/imgLoading.gif (expiration not specified)
https://teratail.com/img/questions/icnBeginner.png (expiration not specified)
https://s.yimg.jp/images/listing/tool/cv/conversion.js (9.8 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-PJJ97D&l=teratailDataLayer (15 minutes)
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https://cs.nakanohito.jp/b3/bi.js (3 hours)

priority - 10Reduce server response time

priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

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

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https://teratail.com/css/plugins/perfect-scrollbar.min.css?1477903098
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priority - 4Optimize images

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priority - 1Minify JavaScript

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teratail.com Desktop Resource Breakdown

Total Resources154
Number of Hosts40
Static Resources74
JavaScript Resources29
CSS Resources3

teratail.com mobile page speed rank

Last tested: 2016-11-07

Mobile Speed Bad
42/100

teratail.com Mobile Speed Test Quick Summary


priority - 89Enable compression

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Compressing https://d-cache.microad.jp/js/sponsor.js could save 913B (63% reduction).

priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 8 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

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priority - 23Leverage 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://b92.yahoo.co.jp/js/s_retargeting.js (expiration not specified)
https://static.ads-twitter.com/uwt.js (expiration not specified)
https://teratail.com/img/sp/common/icnSelect.png (expiration not specified)
https://s.yimg.jp/images/listing/tool/cv/conversion.js (9.2 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-PJJ97D&l=teratailDataLayer (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://teratail.storage.googleapis.com/assets/img…dy01_sp.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…rtTopSp.jpg?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…tnClose.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…acebook.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…nGithub.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…nGoogle.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…nHatena.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/assets/img…Twitter.png?1477903098 (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…lY_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…2h_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…9x_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…YL_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…6G_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…c9_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…jI_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…Je_thumbnail_16x16.jpg (60 minutes)
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https://teratail.storage.googleapis.com/uploads/av…r1_thumbnail_16x16.jpg (60 minutes)
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https://teratail.storage.googleapis.com/uploads/av…Qt_thumbnail_16x16.jpg (60 minutes)
https://teratail.storage.googleapis.com/uploads/av…70_thumbnail_16x16.png (60 minutes)
https://www.google-analytics.com/plugins/ga/inpage_linkid.js (60 minutes)
https://stats.g.doubleclick.net/dc.js (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)
https://cs.nakanohito.jp/b3/bi.js (3 hours)

priority - 14Reduce server response time

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 3.9KiB (23% reduction).

Minifying https://d-cache.microad.jp/js/blade_track_jp.js could save 1.9KiB (23% reduction).
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priority - 0Optimize images

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

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Compressing https://teratail.storage.googleapis.com/uploads/av…70_thumbnail_16x16.png could save 1.1KiB (57% reduction).
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teratail.com Mobile Resource Breakdown

Total Resources123
Number of Hosts36
Static Resources39
JavaScript Resources25
CSS Resources8

teratail.com mobile page usability

Last tested: 2016-11-07

Mobile Usability Good
99/100

teratail.com Mobile Usability Test Quick Summary


priority - 0Size 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 <input id="RadioOr" type="radio" name="conditions"> is close to 1 other tap targets.

teratail.com HTML validation

Errors

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

Line: 170 Column: 5 - 59
"...erR"> <a href="/login/request?btn=head_login" rel="nofollow"><li cl..." Line: 170 Column: 281 - 331
"...i></a> <a href="/login/input?btn=head_new" rel="nofollow"><li cl..."

Attribute “val” not allowed on element “a” at this point.

Line: 367 Column: 23 - 78
"...kgCate_b"><a href="/tags/JavaScript" val="JavaScript" data-id="5">JavaSc..." Line: 413 Column: 23 - 64
"...kgCate_b"><a href="/tags/PHP" val="PHP" data-id="4">PHP</a..." Line: 420 Column: 23 - 106
"...kgCate_b"><a href="/tags/Web%E3%82%B5%E3%83%BC%E3%83%90%E3%83%BC" val="Webサーバー" data-id="378">Webサーバ..." Line: 464 Column: 23 - 69
"...kgCate_b"><a href="/tags/Xcode" val="Xcode" data-id="53">Xcode<..." Line: 471 Column: 23 - 70
"...kgCate_b"><a href="/tags/Swift" val="Swift" data-id="530">Swift<..." Line: 515 Column: 23 - 66
"...kgCate_b"><a href="/tags/Java" val="Java" data-id="3">Java</..." Line: 522 Column: 23 - 73
"...kgCate_b"><a href="/tags/Twitter" val="Twitter" data-id="39">Twitte..." Line: 529 Column: 23 - 65
"...kgCate_b"><a href="/tags/API" val="API" data-id="86">API</a..." Line: 573 Column: 23 - 70
"...kgCate_b"><a href="/tags/Python" val="Python" data-id="7">Python..." Line: 617 Column: 23 - 64
"...kgCate_b"><a href="/tags/PHP" val="PHP" data-id="4">PHP</a..." Line: 661 Column: 23 - 84
"...kgCate_b"><a href="/tags/Raspberry+Pi" val="Raspberry Pi" data-id="662">Raspbe..." Line: 669 Column: 23 - 74
"...kgCate_b"><a href="/tags/Arduino" val="Arduino" data-id="736">Arduin..." Line: 713 Column: 23 - 70
"...kgCate_b"><a href="/tags/Python" val="Python" data-id="7">..." Line: 757 Column: 23 - 67
"...kgCate_b"><a href="/tags/VPN" val="VPN" data-id="1040">VPN</a..." Line: 801 Column: 23 - 78
"...kgCate_b"><a href="/tags/JavaScript" val="JavaScript" data-id="5">JavaSc..." Line: 810 Column: 23 - 70
"...kgCate_b"><a href="/tags/Python" val="Python" data-id="7">Python..." Line: 819 Column: 23 - 66
"...kgCate_b"><a href="/tags/HTML" val="HTML" data-id="8">HTML</..." Line: 826 Column: 23 - 72
"...kgCate_b"><a href="/tags/Django" val="Django" data-id="138">Django..." Line: 870 Column: 23 - 150
"...kgCate_b"><a href="/tags/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0%E8%A8%80%E8%AA%9E" val="プログラミング言語" data-id="485">プログラミン..." Line: 914 Column: 23 - 78
"...kgCate_b"><a href="/tags/WordPress" val="WordPress" data-id="392">WordPr..." Line: 956 Column: 23 - 64
"...kgCate_b"><a href="/tags/PHP" val="PHP" data-id="4">PHP</a..." Line: 963 Column: 23 - 78
"...kgCate_b"><a href="/tags/WordPress" val="WordPress" data-id="392">WordPr..." Line: 1007 Column: 23 - 65
"...kgCate_b"><a href="/tags/iOS" val="iOS" data-id="34">iOS</a..." Line: 1014 Column: 23 - 66
"...kgCate_b"><a href="/tags/SDK" val="SDK" data-id="331">SDK</a..." Line: 1021 Column: 23 - 70
"...kgCate_b"><a href="/tags/Swift" val="Swift" data-id="530">Swift<..." Line: 1028 Column: 23 - 72
"...kgCate_b"><a href="/tags/WebRTC" val="WebRTC" data-id="819">WebRTC..." Line: 1035 Column: 23 - 70
"...kgCate_b"><a href="/tags/Skype" val="Skype" data-id="945">Skype<..." Line: 1079 Column: 23 - 69
"...kgCate_b"><a href="/tags/Xcode" val="Xcode" data-id="53">Xcode<..." Line: 1086 Column: 23 - 66
"...kgCate_b"><a href="/tags/SDK" val="SDK" data-id="331">SDK</a..." Line: 1093 Column: 23 - 72
"...kgCate_b"><a href="/tags/WebRTC" val="WebRTC" data-id="819">WebRTC..." Line: 1137 Column: 23 - 66
"...kgCate_b"><a href="/tags/HTML" val="HTML" data-id="8">HTML</..." Line: 1144 Column: 23 - 72
"...kgCate_b"><a href="/tags/Monaca" val="Monaca" data-id="967">Monaca..." Line: 1186 Column: 23 - 67
"...kgCate_b"><a href="/tags/Ruby" val="Ruby" data-id="16">Ruby</..." Line: 1193 Column: 23 - 85
"...kgCate_b"><a href="/tags/Ruby+on+Rails" val="Ruby on Rails" data-id="42">Ruby o..." Line: 1200 Column: 23 - 91
"...kgCate_b"><a href="/tags/Ruby+on+Rails+5" val="Ruby on Rails 5" data-id="1313">Ruby o..." Line: 1242 Column: 23 - 80
"...kgCate_b"><a href="/tags/Python+3.x" val="Python 3.x" data-id="317">Python..." Line: 1286 Column: 23 - 78
"...kgCate_b"><a href="/tags/WordPress" val="WordPress" data-id="392">WordPr..." Line: 1328 Column: 23 - 73
"...kgCate_b"><a href="/tags/CakePHP" val="CakePHP" data-id="43">CakePH..." Line: 1423 Column: 17 - 97
"... <a href="/tags/PHP" class="boxSideTagsList__list__tagname" val="PHP" data-id="4">PHP</a..." Line: 1435 Column: 17 - 111
"... <a href="/tags/JavaScript" class="boxSideTagsList__list__tagname" val="JavaScript" data-id="5">JavaSc..." Line: 1449 Column: 17 - 103
"... <a href="/tags/Python" class="boxSideTagsList__list__tagname" val="Python" data-id="7">Python..." Line: 1463 Column: 17 - 113
"... <a href="/tags/Python+3.x" class="boxSideTagsList__list__tagname" val="Python 3.x" data-id="317">Python..." Line: 1475 Column: 17 - 99
"... <a href="/tags/Java" class="boxSideTagsList__list__tagname" val="Java" data-id="3">Java</..." Line: 1487 Column: 17 - 103
"... <a href="/tags/Swift" class="boxSideTagsList__list__tagname" val="Swift" data-id="530">Swift<..." Line: 1499 Column: 17 - 97
"... <a href="/tags/C%23" class="boxSideTagsList__list__tagname" val="C#" data-id="2">C#</a>..." Line: 1511 Column: 17 - 111
"... <a href="/tags/WordPress" class="boxSideTagsList__list__tagname" val="WordPress" data-id="392">WordPr..." Line: 1523 Column: 17 - 99
"... <a href="/tags/HTML" class="boxSideTagsList__list__tagname" val="HTML" data-id="8">HTML</..." Line: 1535 Column: 17 - 118
"... <a href="/tags/Ruby+on+Rails" class="boxSideTagsList__list__tagname" val="Ruby on Rails" data-id="42">Ruby o..."

Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.

Line: 1406 Column: 82 - 243
"...="_blank"><img src="https://teratail.storage.googleapis.com/assets/img/teratailReport/201711_Oracle/Or_fv.png?1511950255508342" alt="超高速！in-Databaseの機械学習とは" width="100%" /></a> ..."

Warnings

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Line: 1418 Column: 1 - 45
".../div> <section class="boxSideTags clearFix u-mt10"> <..." Line: 1560 Column: 3 - 62
"... </ul> <section id="userRanking__total" class="boxLatest clearFix"> <..." Line: 1809 Column: 5 - 64
"...ion> <section id="userRanking__month" class="boxLatest clearFix"> ..." Line: 2068 Column: 5 - 63
"...n> <section id="userRanking__week" class="boxLatest clearFix"> ..."

The “language” attribute on the “script” element is obsolete. You can safely omit it.

Line: 2446 Column: 17 - 69
"... <script type="text/javascript" language="javascript"> /* <!..." Line: 2452 Column: 1 - 97
"...</script> <script type="text/javascript" language="javascript" src="//b92.yahoo.co.jp/js/s_retargeting.js"></scri..."

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teratail.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.

teratail.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.