icourse163.org Website Information
Daily Unique Visits: 99,835
Daily Page Views: 599,010
Income Per Day: $1,198
Estimated Value: $862,560
This website is located in China and is using following IP address 223.252.199.73. See the complete list of popular websites hosted in China.
icourse163.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.
Website icourse163.org is using the following name servers:
- ns2.nease.net
- ns6.nease.net
- ns4.nease.net
- ns8.nease.net
- ns5.nease.net
- ns3.nease.net
- ns1.nease.net
and is probably hosted by NETEASE-AS Guangzhou NetEase Computer System Co., Ltd., CN. See the full list of other websites hosted by NETEASE-AS Guangzhou NetEase Computer System Co., Ltd., CN.
The highest website icourse163.org position in Alexa rank database was 12648 and the lowest rank position was 14544. Current position of icourse163.org in Alexa rank database is 14366.
Desktop speed score of icourse163.org (75/100) is better than the results of 59.78% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of icourse163.org (100/100) is better than the results of 100% of other sites and means that the page is mobile-friendly.
Mobile speed score of icourse163.org (77/100) is better than the results of 86.05% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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icourse163.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.
icourse163.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.
Registry Domain ID: D171225930-LROR
Registrar WHOIS Server: whois.pir.org
Registrar URL: http://whois.pir.org/
Updated Date: 2021-01-04T05:53:28Z
Creation Date: 2014-02-25T06:41:39Z
Registry Expiry Date: 2022-02-25T06:41:39Z
Registrar Registration Expiration Date:
Registrar: Alibaba Cloud Computing (Beijing) Co., Ltd.
Registrar IANA ID: 420
Registrar Abuse Contact Email: DomainAbuse@service.aliyun.com
Registrar Abuse Contact Phone: +86.95187
Reseller:
Domain Status: clientUpdateProhibited https://icann.org/epp#clientUpdateProhibited
Registrant Organization: bei jing wang yi you dao ji suan ji xi tong you xian gong si
Registrant State/Province: Beijing
Registrant Country: CN
Name Server: NS3.NEASE.NET
Name Server: NS1.NEASE.NET
Name Server: NS2.NEASE.NET
Name Server: NS4.NEASE.NET
Name Server: NS5.NEASE.NET
Name Server: NS6.NEASE.NET
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-04-25T12:11:34Z
icourse163.org server information
Servers Location
icourse163.org desktop page speed rank
Last tested: 2019-12-07
icourse163.org Desktop Speed Test Quick Summary
priority - 11Optimize images
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priority - 10Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
priority - 7Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://www.icourse163.org/
https://www.icourse163.org/
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://wr.da.netease.com/ga.js (expiration not specified)
https://zz.bdstatic.com/linksubmit/push.js (expiration not specified)
https://urswebzj.nosdn.127.net/webzj_cdn101/message.js (61 seconds)
https://acstatic-dun.126.net/tool.min.js (5 minutes)
priority - 1Reduce server response time
In our test, your server responded in 0.31 seconds.
priority - 1Minify JavaScript
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Minify JavaScript for the following resources to reduce their size by 8.1KiB (27% reduction).
icourse163.org Desktop Resource Breakdown
| Total Resources | 25 |
| Number of Hosts | 12 |
| Static Resources | 19 |
| JavaScript Resources | 10 |
icourse163.org mobile page speed rank
Last tested: 2019-12-09
icourse163.org Mobile Speed Test Quick Summary
priority - 26Avoid landing page redirects
Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.
Avoid landing page redirects for the following chain of redirected URLs.
http://www.icourse163.org/
https://www.icourse163.org/
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://urswebzj.nosdn.127.net/webzj_cdn101/message.js (61 seconds)
https://acstatic-dun.126.net/tool.min.js (5 minutes)
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 8.1KiB (27% reduction).
icourse163.org Mobile Resource Breakdown
| Total Resources | 17 |
| Number of Hosts | 9 |
| Static Resources | 11 |
| JavaScript Resources | 12 |
icourse163.org mobile page usability
Last tested: 2019-12-09
icourse163.org HTML validation
Errors
Bad value “//www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
"...TYPE html> <html xmlns="//www.w3.org/1999/xhtml" xml:lang="zh" lang="zh"> <head..."
Bad value “x-dns-prefetch-control” for attribute “http-equiv” on element “meta”.
"...y=100" /> <meta http-equiv="x-dns-prefetch-control" content="on"/> <meta..."
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
"...mg.com"/> <meta http-equiv="Pragma" content="no-cache"/> <meta..."
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
"...-cache"/> <meta http-equiv="Cache-Control" content="no-cache" max-age="0"/> <meta..."
Attribute “max-age” not allowed on element “meta” at this point.
"...-cache"/> <meta http-equiv="Cache-Control" content="no-cache" max-age="0"/> <meta..."
Bad value “Expires” for attribute “http-equiv” on element “meta”.
"...=edge" /> <meta http-equiv="Expires" content="0"/> <meta..."
Attribute “itemprop” not allowed on element “meta” at this point.
"...联播、新华社"/> <meta name="description" itemprop="description" content="中国大学MOOC(慕课) 是国内优质的中文MOOC学习平台，由爱课程网携手网易云课堂打造。平台拥有包括985高校在内提供的千余门课程，其中首批获得认定的国家精品在线开放课程322门，占2017年获得认定课程总数的65.7%。每一个有提升愿望的人，都可以在这里学习优质高校课程，与名师零距离交流，并获得认证证书。"/> <meta..."
“link” element between “head” and “body”.
"...t></head> <link rel="stylesheet" href="//mc.stu.126.net/pub/s/pt_web_index.web_c194e00c1a5e6923cf53999753a68dfb.css"/> <body..."
Cannot recover after last error. Any further errors will be ignored.
"...t></head> <link rel="stylesheet" href="//mc.stu.126.net/pub/s/pt_web_index.web_c194e00c1a5e6923cf53999753a68dfb.css"/> <body..."
Warnings
Attribute “xmlns” is not serializable as XML 1.0.
"...TYPE html> <html xmlns="//www.w3.org/1999/xhtml" xml:lang="zh" lang="zh"> <head..."
The “type” attribute is unnecessary for JavaScript resources.
"...</script> <script type="text/javascript" src="//urswebzj.nosdn.127.net/webzj_cdn101/message.js"></scri..." Line: 47 Column: 1 - 72
"...</script> <script type="text/javascript" src="//acstatic-dun.126.net/tool.min.js"></scri..." Line: 219 Column: 1 - 31
"...</script> <script type="text/javascript"> windo..."
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icourse163.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.
icourse163.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.