duobei.com Website Information
Daily Unique Visits: 967
Daily Page Views: 1,934
Income Per Day: $6
Estimated Value: $1,440
This website is located in China and is using following IP address 210.73.212.102. See the complete list of popular websites hosted in China.
duobei.com is registered under .COM top-level domain. Please check other sites in .COM zone.
Website duobei.com is using the following name servers:
- n176.ns.yunjiasu.com
- n3100.ns.yunjiasu.com
and is probably hosted by CHINA169-BJ China Unicom Beijing Province Network, CN. See the full list of other websites hosted by CHINA169-BJ China Unicom Beijing Province Network, CN.
The highest website duobei.com position in Alexa rank database was 8636 and the lowest rank position was 965628. Current position of duobei.com in Alexa rank database is 741454.
Desktop speed score of duobei.com (91/100) is better than the results of 90.07% of other sites and shows that the page is performing great on desktop computers.
Mobile usability score of duobei.com (63/100) is better than the results of 9.16% of other sites and means that the page is not mobile-friendly.
Mobile speed score of duobei.com (70/100) is better than the results of 76.43% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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duobei.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.
duobei.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: DUOBEI.COM
Registry Domain ID: 1202995027_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.paycenter.com.cn
Registrar URL: http://www.xinnet.com
Updated Date: 2020-08-08T08:43:03Z
Creation Date: 2007-09-07T13:04:16Z
Registry Expiry Date: 2025-09-07T13:04:16Z
Registrar: Xin Net Technology Corporation
Registrar IANA ID: 120
Registrar Abuse Contact Email: supervision@xinnet.com
Registrar Abuse Contact Phone: +86.4008182233
Domain Status: ok https://icann.org/epp#ok
Name Server: N176.NS.YUNJIASU.COM
Name Server: N3100.NS.YUNJIASU.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-10T23:52:33Z
Registry Domain ID: 1202995027_DOMAIN_COM-VRSN
Registrar WHOIS Server: whois.paycenter.com.cn
Registrar URL: http://www.xinnet.com
Updated Date: 2020-08-08T08:43:03Z
Creation Date: 2007-09-07T13:04:16Z
Registry Expiry Date: 2025-09-07T13:04:16Z
Registrar: Xin Net Technology Corporation
Registrar IANA ID: 120
Registrar Abuse Contact Email: supervision@xinnet.com
Registrar Abuse Contact Phone: +86.4008182233
Domain Status: ok https://icann.org/epp#ok
Name Server: N176.NS.YUNJIASU.COM
Name Server: N3100.NS.YUNJIASU.COM
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of whois database: 2024-09-10T23:52:33Z
duobei.com server information
Servers Location
duobei.com desktop page speed rank
Last tested: 2019-12-08
Desktop Speed
Good
91/100
duobei.com Desktop Speed Test Quick Summary
priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
http://static1.duobei.com/styles/course_discovery.…f11c54494e9b1607b5fd52
http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311
http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311
priority - 2Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 15.6KiB (90% reduction).
Compressing http://img.duobei.com/logo-120-48-20160504.png could save 15.6KiB (90% reduction).
priority - 0Leverage 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:
http://www.google-analytics.com/ga.js (2 hours)
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 2KiB (33% reduction).
Minifying http://static1.duobei.com/javascript/global_new.js?_upv=08 could save 914B (31% reduction) after compression.
Minifying http://static1.duobei.com/javascript/countUp.js could save 771B (38% reduction) after compression.
Minifying http://static1.duobei.com/javascript/jquery.placeh…=201709180731120131024 could save 318B (31% reduction) after compression.
Minifying http://static1.duobei.com/javascript/countUp.js could save 771B (38% reduction) after compression.
Minifying http://static1.duobei.com/javascript/jquery.placeh…=201709180731120131024 could save 318B (31% reduction) after compression.
duobei.com Desktop Resource Breakdown
| Total Resources | 22 |
| Number of Hosts | 5 |
| Static Resources | 19 |
| JavaScript Resources | 12 |
| CSS Resources | 2 |
duobei.com mobile page speed rank
Last tested: 2018-01-20
Mobile Speed
Medium
70/100
duobei.com Mobile Speed Test Quick Summary
priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking CSS resources. This causes a delay in rendering your page.
Optimize CSS Delivery of the following:
http://static1.duobei.com/styles/course_discovery.…f11c54494e9b1607b5fd52
http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311
http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311
priority - 13Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 130.7KiB (65% reduction).
Compressing http://course-img.duobei.com/20140909/ea360e1a4a164ab1b8546a263e736699.jpg could save 45.8KiB (79% reduction).
Compressing http://course-img.duobei.com/20150624/75eb415373ae4393b9fa5e4f1cc4ec14.jpg could save 32.7KiB (76% reduction).
Compressing http://course-img.duobei.com/20160123/299f307ba06641488ff548a433ea14a9.jpg could save 24KiB (78% reduction).
Compressing http://img.duobei.com/logo-120-48-20160504.png could save 15.6KiB (90% reduction).
Compressing http://course-img.duobei.com/20160416/aa915cc631af499c96b72cb7d37c52b0.jpg could save 5.3KiB (32% reduction).
Compressing http://course-img.duobei.com/20160203/478b54769484424285814b2e52f63f74.jpg could save 2.8KiB (22% reduction).
Compressing http://course-img.duobei.com/20160220/c3f3eadabe2c4cb18eed38955af3c0de.jpg could save 2.4KiB (18% reduction).
Compressing http://course-img.duobei.com/20140321/a1da2ba7f0be4e3ba104148d704dd786.jpg could save 2.2KiB (30% reduction).
Compressing http://course-img.duobei.com/20150624/75eb415373ae4393b9fa5e4f1cc4ec14.jpg could save 32.7KiB (76% reduction).
Compressing http://course-img.duobei.com/20160123/299f307ba06641488ff548a433ea14a9.jpg could save 24KiB (78% reduction).
Compressing http://img.duobei.com/logo-120-48-20160504.png could save 15.6KiB (90% reduction).
Compressing http://course-img.duobei.com/20160416/aa915cc631af499c96b72cb7d37c52b0.jpg could save 5.3KiB (32% reduction).
Compressing http://course-img.duobei.com/20160203/478b54769484424285814b2e52f63f74.jpg could save 2.8KiB (22% reduction).
Compressing http://course-img.duobei.com/20160220/c3f3eadabe2c4cb18eed38955af3c0de.jpg could save 2.4KiB (18% reduction).
Compressing http://course-img.duobei.com/20140321/a1da2ba7f0be4e3ba104148d704dd786.jpg could save 2.2KiB (30% reduction).
priority - 5Reduce server response time
priority - 1Leverage 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:
http://www.google-analytics.com/ga.js (2 hours)
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 2KiB (33% reduction).
Minifying http://static1.duobei.com/javascript/global_new.js?_upv=08 could save 914B (31% reduction) after compression.
Minifying http://static1.duobei.com/javascript/countUp.js could save 771B (38% reduction) after compression.
Minifying http://static1.duobei.com/javascript/jquery.placeh…=201709180731120131024 could save 318B (31% reduction) after compression.
Minifying http://static1.duobei.com/javascript/countUp.js could save 771B (38% reduction) after compression.
Minifying http://static1.duobei.com/javascript/jquery.placeh…=201709180731120131024 could save 318B (31% reduction) after compression.
duobei.com Mobile Resource Breakdown
| Total Resources | 35 |
| Number of Hosts | 6 |
| Static Resources | 28 |
| JavaScript Resources | 17 |
| CSS Resources | 2 |
duobei.com mobile page usability
Last tested: 2018-01-20
Mobile Usability
Bad
63/100
duobei.com Mobile Usability Test Quick Summary
priority - 40Use legible font sizes
The following text on your page renders in a way that may be difficult for some of your visitors to read. Use legible font sizes to provide a better user experience.
The following text fragments have a small font size. Increase the font size to make them more legible.
全部课程 and 3 others render only 6 pixels tall (15 CSS pixels).登录 renders only 5 pixels tall (14 CSS pixels).注册 renders only 5 pixels tall (14 CSS pixels).多贝为你提供最好用的在线课程直播和录播平台 renders only 8 pixels tall (20 CSS pixels).名老师在多贝平台上产生了 and 4 others render only 5 pixels tall (14 CSS pixels).20,977,061 renders only 5 pixels tall (14 CSS pixels).537,963 and 1 others render only 5 pixels tall (14 CSS pixels).这里注册 and 1 others render only 5 pixels tall (14 CSS pixels).当前在线学习人数 and 2 others render only 5 pixels tall (14 CSS pixels).这里发生过的课程... renders only 8 pixels tall (20 CSS pixels).互联网 and 4 others render only 5 pixels tall (13 CSS pixels).社会化媒体 and 35 others render only 5 pixels tall (12 CSS pixels).每日推荐公开课 renders only 6 pixels tall (15 CSS pixels).网站运营之Google An…tics（GA）网站数据分析 and 7 others render only 6 pixels tall (15 CSS pixels).William老师 and 7 others render only 5 pixels tall (12 CSS pixels)., 微信zwbzwb9797 运营 and 7 others render only 5 pixels tall (12 CSS pixels).本课程已出版成书，人邮出版，…com/1552607052 and 7 others render only 5 pixels tall (12 CSS pixels).© 2014 duobei.com | and 9 others render only 5 pixels tall (12 CSS pixels).priority - 12Size 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="/" class="main_nav main_nav_home">首页</a> and 1 others are close to other tap targets.The tap target
<a href="/login" class="header_login">登录</a> is close to 1 other tap targets.The tap target
<a href="/register" class="header_register">注册</a> is close to 1 other tap targets.The tap target
<a href="/explore/tag/产品">产品</a> and 35 others are close to other tap targets.The tap target
<a href="/site/4033476557" class="nickname">邱树周</a> and 7 others are close to other tap targets.The tap target
<a href="/course/2684766542">侠说互联网金融</a> is close to 1 other tap targets.priority - 10Configure the viewport
Your page does not have a viewport specified. This causes mobile devices to render your page as it would appear on a desktop browser, scaling it down to fit on a mobile screen. Configure a viewport to allow your page to render properly on all devices.
duobei.com HTML validation
Errors
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 102
"...<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html..."
"...<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html..."
The “charset” attribute on the “link” element is obsolete. Use an HTTP Content-Type header on the linked resource instead.
Line: 9 Column: 2 - 153
"...沿。" /> <link type="text/css" href="http://static1.duobei.com/styles/course_discovery.css?v=43b4fe3709f11c54494e9b1607b5fd52" rel="stylesheet" charset="utf-8"/> <lin..." Line: 10 Column: 2 - 154
"...utf-8"/> <link type="text/css" href="http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311" rel="stylesheet" charset="utf-8" media="screen"/> <sty..."
"...沿。" /> <link type="text/css" href="http://static1.duobei.com/styles/course_discovery.css?v=43b4fe3709f11c54494e9b1607b5fd52" rel="stylesheet" charset="utf-8"/> <lin..." Line: 10 Column: 2 - 154
"...utf-8"/> <link type="text/css" href="http://static1.duobei.com/javascript/wokaobox/wokaobox.css?v=2017091807311" rel="stylesheet" charset="utf-8" media="screen"/> <sty..."
Warnings
The “type” attribute for the “style” element is not needed and should be omitted.
Line: 11 Column: 2 - 24
"...creen"/> <style type="text/css"> .he..."
"...creen"/> <style type="text/css"> .he..."
The “charset” attribute on the “script” element is obsolete.
Line: 367 Column: 1 - 108
"...e;"></a> <script src="http://static1.duobei.com/javascript/jquery-1.7.min.js" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 118 - 248
"...></script><script src="http://static1.duobei.com/javascript/wokaobox/wokaobox.min.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 387 - 510
"...></script><script src="http://static1.duobei.com/javascript/lib/duobei_box.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 520 - 631
"...></script><script src="http://static1.duobei.com/javascript/global_new.js?_upv=08" type="text/javascript" charset="utf-8"></scri..."
"...e;"></a> <script src="http://static1.duobei.com/javascript/jquery-1.7.min.js" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 118 - 248
"...></script><script src="http://static1.duobei.com/javascript/wokaobox/wokaobox.min.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 387 - 510
"...></script><script src="http://static1.duobei.com/javascript/lib/duobei_box.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 520 - 631
"...></script><script src="http://static1.duobei.com/javascript/global_new.js?_upv=08" type="text/javascript" charset="utf-8"></scri..."
The “type” attribute is unnecessary for JavaScript resources.
Line: 367 Column: 1 - 108
"...e;"></a> <script src="http://static1.duobei.com/javascript/jquery-1.7.min.js" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 118 - 248
"...></script><script src="http://static1.duobei.com/javascript/wokaobox/wokaobox.min.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 258 - 377
"...></script><script src="http://static1.duobei.com/javascript/jquery.placeholder.js?v=201709180731120131024" type="text/javascript"></scri..." Line: 367 Column: 387 - 510
"...></script><script src="http://static1.duobei.com/javascript/lib/duobei_box.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 520 - 631
"...></script><script src="http://static1.duobei.com/javascript/global_new.js?_upv=08" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 641 - 671
"...></script><script type="text/javascript"> $(..." Line: 372 Column: 1 - 31
"...</script> <script type="text/javascript"> $.g..." Line: 402 Column: 1 - 31
"...ndif]--> <script type="text/javascript"> ..." Line: 447 Column: 1 - 141
"...ript> --> <script type="text/javascript" src="http://static1.duobei.com/javascript/ulib/new_course_discoveryMIN.js?v=d0ab71cf960b5057734e082aff402dd1"></scri..." Line: 448 Column: 2 - 90
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/echarts.min.js"></scri..." Line: 449 Column: 2 - 97
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/geo.js?v=201606022123"></scri..." Line: 450 Column: 2 - 99
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/china.js?v=201606022123"></scri..." Line: 451 Column: 2 - 107
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/particles.min.js?v=201606022123"></scri..." Line: 452 Column: 2 - 86
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/countUp.js"></scri..." Line: 454 Column: 2 - 32
"...cript> <script type="text/javascript"> $('..." Line: 538 Column: 1 - 31
"...script> <script type="text/javascript"> ..." Line: 596 Column: 1 - 31
".../script> <script type="text/javascript"> v..." Line: 705 Column: 1 - 31
"...</script> <script type="text/javascript"> v..."
"...e;"></a> <script src="http://static1.duobei.com/javascript/jquery-1.7.min.js" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 118 - 248
"...></script><script src="http://static1.duobei.com/javascript/wokaobox/wokaobox.min.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 258 - 377
"...></script><script src="http://static1.duobei.com/javascript/jquery.placeholder.js?v=201709180731120131024" type="text/javascript"></scri..." Line: 367 Column: 387 - 510
"...></script><script src="http://static1.duobei.com/javascript/lib/duobei_box.js?v=2017091807311" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 520 - 631
"...></script><script src="http://static1.duobei.com/javascript/global_new.js?_upv=08" type="text/javascript" charset="utf-8"></scri..." Line: 367 Column: 641 - 671
"...></script><script type="text/javascript"> $(..." Line: 372 Column: 1 - 31
"...</script> <script type="text/javascript"> $.g..." Line: 402 Column: 1 - 31
"...ndif]--> <script type="text/javascript"> ..." Line: 447 Column: 1 - 141
"...ript> --> <script type="text/javascript" src="http://static1.duobei.com/javascript/ulib/new_course_discoveryMIN.js?v=d0ab71cf960b5057734e082aff402dd1"></scri..." Line: 448 Column: 2 - 90
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/echarts.min.js"></scri..." Line: 449 Column: 2 - 97
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/geo.js?v=201606022123"></scri..." Line: 450 Column: 2 - 99
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/china.js?v=201606022123"></scri..." Line: 451 Column: 2 - 107
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/particles.min.js?v=201606022123"></scri..." Line: 452 Column: 2 - 86
".../script> <script type="text/javascript" src="http://static1.duobei.com/javascript/countUp.js"></scri..." Line: 454 Column: 2 - 32
"...cript> <script type="text/javascript"> $('..." Line: 538 Column: 1 - 31
"...script> <script type="text/javascript"> ..." Line: 596 Column: 1 - 31
".../script> <script type="text/javascript"> v..." Line: 705 Column: 1 - 31
"...</script> <script type="text/javascript"> v..."
This document appears to be written in Simplified Chinese. Consider adding “lang="zh-hans"” (or variant) to the “html” start tag.
Line: 2 Column: 103 - 6
"...oose.dtd"> <html> <head..."
"...oose.dtd"> <html> <head..."
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duobei.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.
duobei.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.