os3.nl website information.
os3.nl domain name is registered by .NL top-level domain registry. See the other sites registred in .NL domain zone.
No name server records were found.
and probably website os3.nl is hosted by AMAZON-AES - Amazon.com, Inc., US web hosting company. Check the complete list of other most popular websites hosted by AMAZON-AES - Amazon.com, Inc., US hosting company.
According to Alexa traffic rank the highest website os3.nl position was 133601 (in the world). The lowest Alexa rank position was 989538. Now website os3.nl ranked in Alexa database as number 780637 (in the world).
Website os3.nl Desktop speed measurement score (16/100) is better than the results of 2.91% of other sites shows that the page desktop performance can be improved.
os3.nl Mobile usability score (62/100) is better than the results of 7.29% of other sites and shows that the page mobile usability is poor and can be improved.
Mobile speed measurement score of os3.nl (13/100) is better than the results of 2.22% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
Weekly Rank Report
| Date | Rank | Change |
|---|---|---|
| Nov-19-2024 | N/A | N/A |
| Nov-18-2024 | 780,637 | -23,509 |
| Nov-17-2024 | 757,128 | 8,485 |
| Nov-16-2024 | 765,613 | -7,755 |
| Nov-15-2024 | 757,858 | -14,352 |
| Nov-14-2024 | 743,506 | 5,983 |
| Nov-13-2024 | 749,489 | 0 |
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os3.nl 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.
os3.nl 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: os3.nl
Status: active
Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands
Abuse Contact:
+31.887873000
cert@surfcert.nl
Creation Date: 2003-01-29
Updated Date: 2012-05-31
DNSSEC: yes
Domain nameservers:
ns1.os3.nl 145.100.96.66
ns1.os3.nl 2001:610:158:960::66
ns2.os3.nl 145.100.96.99
ns2.os3.nl 2001:610:158:960::99
ns1.zurich.surf.net
Record maintained by: NL Domain Registry
Copyright notice
No part of this publication may be reproduced, published, stored in a
retrieval system, or transmitted, in any form or by any means,
electronic, mechanical, recording, or otherwise, without prior
permission of the Foundation for Internet Domain Registration in the
Netherlands (SIDN).
These restrictions apply equally to registrars, except in that
reproductions and publications are permitted insofar as they are
reasonable, necessary and solely in the context of the registration
activities referred to in the General Terms and Conditions for .nl
Registrars.
Any use of this material for advertising, targeting commercial offers or
similar activities is explicitly forbidden and liable to result in legal
action. Anyone who is aware or suspects that such activities are taking
place is asked to inform the Foundation for Internet Domain Registration
in the Netherlands.
(c) The Foundation for Internet Domain Registration in the Netherlands
(SIDN) Dutch Copyright Act, protection of authors' rights (Section 10,
subsection 1, clause 1).
os3.nl server information
Servers Location
| IP Address |
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| Country |
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os3.nl desktop page speed rank
Last tested: 2017-05-31
os3.nl Desktop Speed Test Quick Summary
priority - 209 Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 2MiB (98% reduction).
Compressing https://www.os3.nl/lib/tpl/website/SNE-images/bgbiggradient.png could save 3.7KiB (79% reduction).
Compressing https://www.os3.nl/lib/plugins/sidebox/bgsmallgradient.png could save 895B (51% reduction).
Compressing https://www.os3.nl/lib/tpl/website/images/link_icon.gif could save 583B (61% reduction).
priority - 111 Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 1.1MiB (74% reduction).
priority - 63 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 614.8KiB (43% reduction).
priority - 18 Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking script resources and 1 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:
https://www.os3.nl/non-wiki/mathjax-dokuwiki/MathJax.js?config=TeX-AMS_HTML
Optimize CSS Delivery of the following:
priority - 5 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:
https://www.os3.nl/lib/plugins/sidebox/bgsmallgradient.png (expiration not specified)
https://www.os3.nl/lib/tpl/website//SNE-images/SNELogo.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/SNE-images/bgbiggradient.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/buttonshadow.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/closed.gif (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/inputshadow.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/link_icon.gif (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/open.gif (expiration not specified)
https://www.os3.nl/_media/top_2017.png?w=165&tok=373897 (24 hours)
os3.nl Desktop Resources
| Total Resources | 17 |
| Number of Hosts | 2 |
| Static Resources | 12 |
| JavaScript Resources | 3 |
| CSS Resources | 1 |
os3.nl Desktop Resource Breakdown
os3.nl mobile page speed rank
Last tested: 2017-05-31
os3.nl Mobile Speed Test Quick Summary
priority - 209 Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 2MiB (98% reduction).
Compressing https://www.os3.nl/lib/tpl/website/SNE-images/bgbiggradient.png could save 3.7KiB (79% reduction).
Compressing https://www.os3.nl/lib/plugins/sidebox/bgsmallgradient.png could save 895B (51% reduction).
Compressing https://www.os3.nl/lib/tpl/website/images/link_icon.gif could save 583B (61% reduction).
priority - 111 Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 1.1MiB (74% reduction).
priority - 72 Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking script resources and 1 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:
https://www.os3.nl/non-wiki/mathjax-dokuwiki/MathJax.js?config=TeX-AMS_HTML
Optimize CSS Delivery of the following:
priority - 63 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 614.8KiB (43% reduction).
priority - 7 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:
https://www.os3.nl/lib/plugins/sidebox/bgsmallgradient.png (expiration not specified)
https://www.os3.nl/lib/tpl/website//SNE-images/SNELogo.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/SNE-images/bgbiggradient.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/buttonshadow.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/closed.gif (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/inputshadow.png (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/link_icon.gif (expiration not specified)
https://www.os3.nl/lib/tpl/website/images/open.gif (expiration not specified)
https://www.os3.nl/_media/top_2017.png?w=165&tok=373897 (24 hours)
os3.nl Mobile Resources
| Total Resources | 18 |
| Number of Hosts | 2 |
| Static Resources | 12 |
| JavaScript Resources | 3 |
| CSS Resources | 1 |
os3.nl Mobile Resource Breakdown
os3.nl mobile page usability
Last tested: 2017-05-31
os3.nl Mobile Usability Test Quick Summary
priority - 40 Use 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.
Trace: and 1 others render only 4 pixels tall (10 CSS pixels).SNE/OS3 Homepage renders only 4 pixels tall (10 CSS pixels).Navigation renders only 5 pixels tall (13 CSS pixels).OS3 Masters Theses and 18 others render only 4 pixels tall (11 CSS pixels).Archive and 1 others render only 4 pixels tall (11 CSS pixels).Courses renders only 4 pixels tall (11 CSS pixels).Keuzegids (Dutch) renders only 5 pixels tall (13 CSS pixels).Master Education SNE/OS3 and 5 others render only 8 pixels tall (20 CSS pixels).In order to ma…e improved our and 31 others render only 5 pixels tall (13 CSS pixels).University of Amsterdam and 2 others render only 5 pixels tall (13 CSS pixels).Security and N…rk Engineering and 8 others render only 5 pixels tall (13 CSS pixels).the admission page and 3 others render only 5 pixels tall (13 CSS pixels).handout format and 1 others render only 5 pixels tall (13 CSS pixels).SNE again awar…er in category and 1 others render only 5 pixels tall (13 CSS pixels).paper renders only 5 pixels tall (13 CSS pixels).info and 2 others render only 5 pixels tall (13 CSS pixels).priority - 13 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.
<a href="/start" class="breadcrumbs">SNE/OS3 Homepage</a> is close to 1 other tap targets.<input id="qsearch__in" type="text" name="id" class="edit"> is close to 1 other tap targets.<input type="submit" class="button"> is close to 2 other tap targets.<a href="/start" class="wikilink1">Home</a> and 18 others are close to other tap targets.<a href="#foldedlist_134" class="folder">Info</a> and 1 others are close to other tap targets.<a href="#foldedlist_548" class="folder">Courses</a> is close to 4 other tap targets.<a href="#sidebox_22" class="sidebox_title">Keuzegids (Dutch)</a> is close to 1 other tap targets.priority - 10 Configure 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.
Configure a viewport for this page.
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os3.nl 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.
os3.nl 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.