UOJ.AC UOJ - Universal Online Judge


uoj.ac website information.

uoj.ac domain name is registered by .AC top-level domain registry. See the other sites registred in .AC domain zone.

Following name servers are specified for uoj.ac domain:

  • v1s2.xundns.com
  • v1s1.xundns.com

and probably website uoj.ac is hosted by TWITTER - Twitter Inc., US web hosting company. Check the complete list of other most popular websites hosted by TWITTER - Twitter Inc., US hosting company.

According to Alexa traffic rank the highest website uoj.ac position was 6683 (in the world). The lowest Alexa rank position was 975224. Now website uoj.ac ranked in Alexa database as number 582699 (in the world).

Website uoj.ac Desktop speed measurement score (88/100) is better than the results of 85.98% of other sites and shows that the page is performing great on desktop computers.

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

Mobile speed measurement score of uoj.ac (75/100) is better than the results of 84.42% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

Weekly Rank Report

DateRankChange
Nov-19-2024 582,69915,372
Nov-18-2024 598,071-21,958
Nov-17-2024 576,1137,348
Nov-16-2024 583,461-4,367
Nov-15-2024 579,0949,788
Nov-14-2024 588,8822,926
Nov-13-2024 591,8080

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uoj.ac Rank History

Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.



uoj.ac whois

WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.


Domain Name: uoj.ac
Registry Domain ID: 59995d6fb2cf46fc9c5bb5ee6fce398e-DONUTS
Registrar WHOIS Server: whois.rrpproxy.net
Registrar URL: http://key-systems.net
Updated Date: 2020-10-19T01:04:53Z
Creation Date: 2014-09-24T14:26:33Z
Registry Expiry Date: 2022-09-24T14:26:33Z
Registrar: Key-Systems GmbH
Registrar IANA ID: 269
Registrar Abuse Contact Email: abuse@key-systems.net
Registrar Abuse Contact Phone: +49 6894 9396 850
Domain Status: ok https://icann.org/epp#ok
Registry Registrant ID: REDACTED FOR PRIVACY
Registrant Name: REDACTED FOR PRIVACY
Registrant Organization: Lv Kaifeng
Registrant Street: REDACTED FOR PRIVACY
Registrant City: REDACTED FOR PRIVACY
Registrant State/Province:
Registrant Postal Code: REDACTED FOR PRIVACY
Registrant Country: CN
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: vip1.alidns.com
Name Server: vip2.alidns.com
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2022-08-15T06:18:58Z

uoj.ac server information

Servers Location

IP Address
114.215.147.61
Country
China
Region
Zhejiang
City
Hangzhou

uoj.ac desktop page speed rank

Last tested: 2017-05-26


Desktop Speed Good
88/100

uoj.ac Desktop Speed Test Quick Summary


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

Your page has 9 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

http://uoj.ac/js/jquery.min.js
http://uoj.ac/js/jquery.autosize.min.js
http://uoj.ac/js/jquery.cookie.min.js
http://uoj.ac/js/jquery.modal.js
http://uoj.ac/js/bootstrap.min.js?v=2015.5.31
http://uoj.ac/js/color-converter.min.js
http://uoj.ac/js/uoj.js?v=2017.01.01
http://uoj.ac/js/readmore/readmore.min.js
http://uoj.ac/js/LAB.min.js

Optimize CSS Delivery of the following:

http://uoj.ac/css/bootstrap.min.css?v=2015.5.31
http://uoj.ac/css/bootstrap-theme.min.css?v=2015.5.31
http://uoj.ac/css/uoj-theme.css?v=2.3333

priority - 6 Leverage 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://img.uoj.ac/utility/flags/24/cn.png (expiration not specified)
http://img.uoj.ac/utility/flags/24/gb.png (expiration not specified)
http://uoj.ac/js/LAB.min.js (expiration not specified)
http://uoj.ac/js/color-converter.min.js (expiration not specified)
http://uoj.ac/js/jquery.autosize.min.js (expiration not specified)
http://uoj.ac/js/jquery.cookie.min.js (expiration not specified)
http://uoj.ac/js/jquery.min.js (expiration not specified)
http://uoj.ac/js/jquery.modal.js (expiration not specified)
http://uoj.ac/js/readmore/readmore.min.js (expiration not specified)
http://uoj.ac/pictures/UOJ.png (expiration not specified)
http://uoj.ac/pictures/UOJ_small.png (expiration not specified)

priority - 0 Optimize images

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

Optimize the following images to reduce their size by 1.6KiB (25% reduction).

Compressing http://uoj.ac/pictures/UOJ_small.png could save 1.6KiB (25% reduction).

priority - 0 Minify 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 795B (11% reduction).

Minifying http://uoj.ac/js/uoj.js?v=2017.01.01 could save 795B (11% reduction) after compression.

uoj.ac Desktop Resources

Total Resources20
Number of Hosts3
Static Resources11
JavaScript Resources10
CSS Resources3

uoj.ac Desktop Resource Breakdown

uoj.ac mobile page speed rank

Last tested: 2017-05-26


Mobile Speed Medium
75/100

uoj.ac Mobile Speed Test Quick Summary


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

Your page has 9 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.

Remove render-blocking JavaScript:

http://uoj.ac/js/jquery.min.js
http://uoj.ac/js/jquery.autosize.min.js
http://uoj.ac/js/jquery.cookie.min.js
http://uoj.ac/js/jquery.modal.js
http://uoj.ac/js/bootstrap.min.js?v=2015.5.31
http://uoj.ac/js/color-converter.min.js
http://uoj.ac/js/uoj.js?v=2017.01.01
http://uoj.ac/js/readmore/readmore.min.js
http://uoj.ac/js/LAB.min.js

Optimize CSS Delivery of the following:

http://uoj.ac/css/bootstrap.min.css?v=2015.5.31
http://uoj.ac/css/bootstrap-theme.min.css?v=2015.5.31
http://uoj.ac/css/uoj-theme.css?v=2.3333

priority - 8 Leverage 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://img.uoj.ac/utility/flags/24/cn.png (expiration not specified)
http://img.uoj.ac/utility/flags/24/gb.png (expiration not specified)
http://uoj.ac/js/LAB.min.js (expiration not specified)
http://uoj.ac/js/color-converter.min.js (expiration not specified)
http://uoj.ac/js/jquery.autosize.min.js (expiration not specified)
http://uoj.ac/js/jquery.cookie.min.js (expiration not specified)
http://uoj.ac/js/jquery.min.js (expiration not specified)
http://uoj.ac/js/jquery.modal.js (expiration not specified)
http://uoj.ac/js/readmore/readmore.min.js (expiration not specified)
http://uoj.ac/pictures/UOJ.png (expiration not specified)
http://uoj.ac/pictures/UOJ_small.png (expiration not specified)

priority - 0 Optimize images

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

Optimize the following images to reduce their size by 1.6KiB (25% reduction).

Compressing http://uoj.ac/pictures/UOJ_small.png could save 1.6KiB (25% reduction).

priority - 0 Minify 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 795B (11% reduction).

Minifying http://uoj.ac/js/uoj.js?v=2017.01.01 could save 795B (11% reduction) after compression.

uoj.ac Mobile Resources

Total Resources17
Number of Hosts2
Static Resources11
JavaScript Resources9
CSS Resources3

uoj.ac Mobile Resource Breakdown

uoj.ac mobile page usability

Last tested: 2017-05-26


Mobile Usability Good
99/100

uoj.ac Mobile Usability Test Quick Summary


priority - 0 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="http://uoj.ac/?locale=zh-cn"></a> and 1 others are close to other tap targets.

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uoj.ac Ping

Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.


uoj.ac TRACEROUTE

Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.