UU.NL Universiteit Utrecht | Sharing science, shaping tomorrow

uu.nl Website Information

Daily Unique Visits: 1,083,831

Daily Page Views: 8,670,648

Income Per Day: $8,671

Estimated Value: $9,364,680

This website is located in Belgium and is using following IP address 83.217.76.86. See the complete list of popular websites hosted in Belgium.

uu.nl is registered under .NL top-level domain. Please check other sites in .NL zone.

Website uu.nl is using the following name servers:

  • azie.net.uu.nl
  • ns1.zurich.surf.net
  • ns1.surfnet.nl
  • australie.net.uu.nl

and is probably hosted by Combell NV. See the full list of other websites hosted by Combell NV.

The highest website uu.nl position in Alexa rank database was 1404 and the lowest rank position was 1537. Current position of uu.nl in Alexa rank database is 1406.

Desktop speed score of uu.nl (50/100) is better than the results of 23.83% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of uu.nl (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 uu.nl (45/100) is better than the results of 25.64% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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uu.nl 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.


uu.nl 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: uu.nl
Status: active

Registrar:
SURF B.V.
Moreelsepark 48
3511EP UTRECHT
Netherlands

Abuse Contact:
+31.887873000
cert@surfcert.nl

Creation Date: 1997-03-27

Updated Date: 2020-05-27

DNSSEC: no

Domain nameservers:
ns.uu.nl 131.211.4.8
ns1.surfnet.nl
ns2.uu.nl 131.211.4.25

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).

uu.nl server information

Servers Location

uu.nl desktop page speed rank

Last tested: 2017-04-25


Desktop Speed Bad
50/100

uu.nl Desktop Speed Test Quick Summary


priority - 87Enable compression

Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.

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Compressing https://www.uu.nl/sites/all/themes/uubasetheme/images/logo_footer-nl.svg could save 27.3KiB (75% reduction).
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Compressing https://siteimproveanalytics.com/js/siteanalyze_6005651.js could save 13.8KiB (64% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css could save 12.5KiB (74% reduction).
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Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 1.2KiB (55% reduction).

priority - 12Minify JavaScript

Compacting JavaScript code can save many bytes of data and speed up downloading, parsing, and execution time.

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Minifying https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 87.9KiB (42% reduction).
Minifying https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 31.7KiB (21% reduction).

priority - 7Avoid landing page redirects

Your page has 2 redirects. Redirects introduce additional delays before the page can be loaded.

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http://uu.nl/
http://www.uu.nl/
https://www.uu.nl/

priority - 2Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css

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://www.googletagmanager.com/gtm.js?id=GTM-KLP5L3 (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://siteimproveanalytics.com/js/siteanalyze_6005651.js (4 hours)

priority - 1Optimize images

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

Optimize the following images to reduce their size by 6.2KiB (76% reduction).

Compressing and resizing https://www.uu.nl/sites/default/files/styles/image…2_50.jpg?itok=G7f1LoQa could save 3.2KiB (81% reduction).
Compressing and resizing https://www.uu.nl/sites/default/files/styles/image…rjpg.jpg?itok=Qqz70fUt could save 1.5KiB (71% reduction).
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uu.nl Desktop Resource Breakdown

Total Resources40
Number of Hosts7
Static Resources21
JavaScript Resources9
CSS Resources4

uu.nl mobile page speed rank

Last tested: 2017-04-25


Mobile Speed Bad
45/100

uu.nl Mobile Speed Test Quick Summary


priority - 87Enable 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 848.7KiB (81% reduction).

Compressing https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css could save 268.2KiB (89% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css could save 187.9KiB (94% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 166.4KiB (78% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 102.1KiB (66% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 31KiB (64% reduction).
Compressing https://www.uu.nl/sites/all/themes/uubasetheme/images/logo_footer-nl.svg could save 27.3KiB (75% reduction).
Compressing https://www.uu.nl/sites/all/themes/uubasetheme/images/logo-nl.svg could save 27KiB (75% reduction).
Compressing https://siteimproveanalytics.com/js/siteanalyze_6005651.js could save 13.8KiB (64% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css could save 12.5KiB (74% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css could save 6.6KiB (80% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 4.7KiB (58% reduction).
Compressing https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 1.2KiB (55% reduction).

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://uu.nl/
http://www.uu.nl/
https://www.uu.nl/

priority - 12Minify 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 119.6KiB (33% reduction).

Minifying https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 87.9KiB (42% reduction).
Minifying https://www.uu.nl/sites/default/files/advagg_js/js…n60D8TMTCSl-_eFyfvI.js could save 31.7KiB (21% reduction).

priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 1 blocking CSS resources. This causes a delay in rendering your page.

Optimize CSS Delivery of the following:

https://www.uu.nl/sites/default/files/advagg_css/c…60D8TMTCSl-_eFyfvI.css

priority - 3Leverage 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.googletagmanager.com/gtm.js?id=GTM-KLP5L3 (15 minutes)
https://www.google-analytics.com/plugins/ua/linkid.js (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://siteimproveanalytics.com/js/siteanalyze_6005651.js (4 hours)

uu.nl Mobile Resource Breakdown

Total Resources40
Number of Hosts7
Static Resources21
JavaScript Resources9
CSS Resources4

uu.nl mobile page usability

Last tested: 2017-04-25


Mobile Usability Good
99/100

uu.nl 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 <button id="edit-submit-search" type="submit" name="op" class="button">Zoeken</button> is close to 1 other tap targets.

The tap target <button id="edit-submit-search" type="submit" name="op" class="button">Zoeken</button> is close to 1 other tap targets.

The tap target <a href="/en/homepage">en</a> is close to 1 other tap targets.

uu.nl HTML validation

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Line: 12 Column: 1 - 127
"...omst." /> <meta name="viewport" content="width=device-width, initial-scale=1.0, minimum-scale=1.0, maximum-scale=1.0, user-scalable=1" /> <me..."

Errors

Bad value “cleartype” for attribute “http-equiv” on element “meta”.

Line: 13 Column: 1 - 44
"...ble=1" /> <meta http-equiv="cleartype" content="on" /> <link..."

An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.

Line: 257 Column: 34 - 191
"...humbnail"><img src="https://www.uu.nl/sites/default/files/styles/image_120x80/public/dgk_potvis_stranding_thumbnail_120x80.jpg?itok=zO17T8lj" width="120" height="80" /></div>..."

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uu.nl 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.


uu.nl 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.