opentutorials.org Website Information
Daily Unique Visits: 55,709
Daily Page Views: 334,254
Income Per Day: $669
Estimated Value: $481,680
This website is located in Korea and is using following IP address 13.124.77.38. See the complete list of popular websites hosted in Korea.
opentutorials.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.
Website opentutorials.org is using the following name servers:
- ns-106.awsdns-13.com
- ns-1390.awsdns-45.org
- ns-1739.awsdns-25.co.uk
- ns-995.awsdns-60.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 opentutorials.org position in Alexa rank database was 25412 and the lowest rank position was 60909. Current position of opentutorials.org in Alexa rank database is 25745.
Desktop speed score of opentutorials.org (62/100) is better than the results of 38.44% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of opentutorials.org (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 opentutorials.org (63/100) is better than the results of 61.76% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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opentutorials.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.
opentutorials.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: opentutorials.org
Registry Domain ID: a77e45a5f69942dfa89f83583244c5b9-LROR
Registrar WHOIS Server:
Registrar URL: http://www.dotname.co.kr
Updated Date: 2024-01-24T10:11:36Z
Creation Date: 2011-01-20T13:04:16Z
Registry Expiry Date: 2025-01-20T13:04:16Z
Registrar: Dotname Korea Corp.
Registrar IANA ID: 1132
Registrar Abuse Contact Email: domain@dotnamekorea.com
Registrar Abuse Contact Phone: +82.7070900820
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization:
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: no
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: KR
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-1390.awsdns-45.org
Name Server: ns-106.awsdns-13.com
Name Server: ns-1739.awsdns-25.co.uk
Name Server: ns-995.awsdns-60.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-09-19T08:15:36Z
Registry Domain ID: a77e45a5f69942dfa89f83583244c5b9-LROR
Registrar WHOIS Server:
Registrar URL: http://www.dotname.co.kr
Updated Date: 2024-01-24T10:11:36Z
Creation Date: 2011-01-20T13:04:16Z
Registry Expiry Date: 2025-01-20T13:04:16Z
Registrar: Dotname Korea Corp.
Registrar IANA ID: 1132
Registrar Abuse Contact Email: domain@dotnamekorea.com
Registrar Abuse Contact Phone: +82.7070900820
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization:
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province: no
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: KR
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-1390.awsdns-45.org
Name Server: ns-106.awsdns-13.com
Name Server: ns-1739.awsdns-25.co.uk
Name Server: ns-995.awsdns-60.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-09-19T08:15:36Z
opentutorials.org server information
Servers Location
opentutorials.org desktop page speed rank
Last tested: 2016-10-14
Desktop Speed
Bad
62/100
opentutorials.org Desktop Speed Test Quick Summary
priority - 35Enable compression
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priority - 18Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.
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Optimize CSS Delivery of the following:
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https://fonts.googleapis.com/earlyaccess/nanumgothic.css
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priority - 6Minify JavaScript
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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:
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https://www.google-analytics.com/analytics.js (2 hours)
priority - 1Optimize images
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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 871B (13% reduction).
Minifying https://opentutorials.org/ could save 871B (13% reduction) after compression.
opentutorials.org Desktop Resource Breakdown
| Total Resources | 20 |
| Number of Hosts | 5 |
| Static Resources | 16 |
| JavaScript Resources | 4 |
| CSS Resources | 2 |
opentutorials.org mobile page speed rank
Last tested: 2016-10-14
Mobile Speed
Bad
63/100
opentutorials.org Mobile Speed Test Quick Summary
priority - 32Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
https://opentutorials.org/static/cache/ahc/6065fc8…6f3a862e_1475258645.js
Optimize CSS Delivery of the following:
https://opentutorials.org/static/cache/ahc/a002112…a952e0a_1475258645.css
priority - 17Enable compression
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Enable compression for the following resources to reduce their transfer size by 165.1KiB (74% reduction).
Compressing https://opentutorials.org/static/cache/ahc/6065fc8…6f3a862e_1475258645.js could save 130.1KiB (73% reduction).
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priority - 6Minify 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 60.5KiB (35% reduction).
Minifying https://opentutorials.org/static/cache/ahc/6065fc8…6f3a862e_1475258645.js could save 60.5KiB (35% reduction).
priority - 4Leverage 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://s3-ap-northeast-2.amazonaws.com/opentutori…r-file/avatar/40/1.png (expiration not specified)
https://s3-ap-northeast-2.amazonaws.com/opentutori…le/avatar/40/27328.png (expiration not specified)
https://s3-ap-northeast-2.amazonaws.com/opentutori…-file/avatar/40/39.png (expiration not specified)
https://s3-ap-northeast-2.amazonaws.com/opentutori…-file/avatar/40/77.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
https://s3-ap-northeast-2.amazonaws.com/opentutori…le/avatar/40/27328.png (expiration not specified)
https://s3-ap-northeast-2.amazonaws.com/opentutori…-file/avatar/40/39.png (expiration not specified)
https://s3-ap-northeast-2.amazonaws.com/opentutori…-file/avatar/40/77.png (expiration not specified)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 2Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 15.3KiB (39% reduction).
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Compressing https://opentutorials.org/static/img/mobile/img_logo@2x.png could save 3KiB (33% reduction).
Compressing https://opentutorials.org/static/img/common/badge/bn_fund.png could save 2.9KiB (46% reduction).
Compressing https://opentutorials.org/static/img/mobile/icon_black.png could save 1.9KiB (22% reduction).
Compressing https://opentutorials.org/static/img/common/badge/bn_close.png could save 873B (85% reduction).
Compressing https://s3-ap-northeast-2.amazonaws.com/opentutori…le/avatar/40/27328.png could save 823B (53% reduction).
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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 672B (14% reduction).
Minifying https://opentutorials.org/ could save 672B (14% reduction) after compression.
opentutorials.org Mobile Resource Breakdown
| Total Resources | 18 |
| Number of Hosts | 4 |
| Static Resources | 14 |
| JavaScript Resources | 3 |
| CSS Resources | 1 |
opentutorials.org mobile page usability
Last tested: 2016-10-14
Mobile Usability
Good
99/100
opentutorials.org 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
<a href="https://opentu…ule/1588/12591" class="bn_fund"></a> is close to 1 other tap targets.opentutorials.org HTML validation
Errors
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Line: 6 Column: 2 - 72
"...orials"> <meta http-equiv="x-ua-compatible" content="IE=9; IE=8; IE=7; IE=EDGE"> <me..."
"...orials"> <meta http-equiv="x-ua-compatible" content="IE=9; IE=8; IE=7; IE=EDGE"> <me..."
Element “p” not allowed as child of element “hgroup” in this context. (Suppressing further errors from this subtree.)
Line: 97 Column: 4 - 6
"...g</h1> <p>Make y..." Line: 107 Column: 6 - 8
".../h2> <p>Module..." Line: 205 Column: 6 - 8
".../h2> <p>Course..."
"...g</h1> <p>Make y..." Line: 107 Column: 6 - 8
".../h2> <p>Module..." Line: 205 Column: 6 - 8
".../h2> <p>Course..."
Element “a” not allowed as child of element “hgroup” in this context. (Suppressing further errors from this subtree.)
Line: 108 Column: 6 - 66
"...</p> <a href="https://opentutorials.org/module" class="icon more">전체보기<s..." Line: 206 Column: 6 - 66
"...</p> <a href="https://opentutorials.org/course" class="icon more">전체보기<s..."
"...</p> <a href="https://opentutorials.org/module" class="icon more">전체보기<s..." Line: 206 Column: 6 - 66
"...</p> <a href="https://opentutorials.org/course" class="icon more">전체보기<s..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 120 Column: 8 - 159
"..."> <img class="profile_icon" data-id="77" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/77.png" width="40" height="40" /> ..." Line: 135 Column: 8 - 165
"..."> <img class="profile_icon" data-id="27328" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/27328.png" width="40" height="40" /> ..." Line: 150 Column: 8 - 157
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 165 Column: 8 - 159
"..."> <img class="profile_icon" data-id="77" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/77.png" width="40" height="40" /> ..." Line: 180 Column: 8 - 163
"..."> <img class="profile_icon" data-id="3458" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/3458.png" width="40" height="40" /> ..." Line: 234 Column: 8 - 156
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 259 Column: 8 - 156
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 285 Column: 8 - 164
"..."> <img class="profile_icon" data-id="20782" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/20782.png" width="40" height="40" /> ..." Line: 316 Column: 8 - 164
"..."> <img class="profile_icon" data-id="27328" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/27328.png" width="40" height="40" /> ..." Line: 343 Column: 8 - 158
"..."> <img class="profile_icon" data-id="39" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/39.png" width="40" height="40" /> ..." Line: 626 Column: 79 - 128
"..."bn_fund"><img src="/static/img/common/badge/bn_fund.png" /></a> ..." Line: 642 Column: 111 - 240
"...ght:1px;"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg=="></a></..."
"..."> <img class="profile_icon" data-id="77" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/77.png" width="40" height="40" /> ..." Line: 135 Column: 8 - 165
"..."> <img class="profile_icon" data-id="27328" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/27328.png" width="40" height="40" /> ..." Line: 150 Column: 8 - 157
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 165 Column: 8 - 159
"..."> <img class="profile_icon" data-id="77" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/77.png" width="40" height="40" /> ..." Line: 180 Column: 8 - 163
"..."> <img class="profile_icon" data-id="3458" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/3458.png" width="40" height="40" /> ..." Line: 234 Column: 8 - 156
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 259 Column: 8 - 156
"..."> <img class="profile_icon" data-id="1" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/1.png" width="40" height="40" /> ..." Line: 285 Column: 8 - 164
"..."> <img class="profile_icon" data-id="20782" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/20782.png" width="40" height="40" /> ..." Line: 316 Column: 8 - 164
"..."> <img class="profile_icon" data-id="27328" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/27328.png" width="40" height="40" /> ..." Line: 343 Column: 8 - 158
"..."> <img class="profile_icon" data-id="39" src="https://s3-ap-northeast-2.amazonaws.com/opentutorials-user-file/avatar/40/39.png" width="40" height="40" /> ..." Line: 626 Column: 79 - 128
"..."bn_fund"><img src="/static/img/common/badge/bn_fund.png" /></a> ..." Line: 642 Column: 111 - 240
"...ght:1px;"><img src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAADUlEQVR42mNk+P+/HgAFhAJ/wlseKgAAAABJRU5ErkJggg=="></a></..."
Attribute “results” not allowed on element “input” at this point.
Line: 395 Column: 4 - 75
"...세요</p> <input type="text" placeholder="e.g. 생활코딩 " id="q" name="q" results="5"> <b..."
"...세요</p> <input type="text" placeholder="e.g. 생활코딩 " id="q" name="q" results="5"> <b..."
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Line: 465 Column: 2 - 24
"... </div> <style type="text/css"> ...."
"... </div> <style type="text/css"> ...."
The “for” attribute of the “label” element must refer to a non-hidden form control.
Line: 75 Column: 15 - 46
"... <dt><label for="prodialog_password">비밀번호</..."
"... <dt><label for="prodialog_password">비밀번호</..."
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opentutorials.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.
opentutorials.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.