astron.nl Website Information
Daily Unique Visits: 9,098
Daily Page Views: 45,490
Income Per Day: $114
Estimated Value: $68,400
astron.nl is registered under .NL top-level domain. Please check other sites in .NL zone.
No name server records were found.
and is probably hosted by SURFnet bv. See the full list of other websites hosted by SURFnet bv.
The highest website astron.nl position in Alexa rank database was 27082 and the lowest rank position was 992886. Current position of astron.nl in Alexa rank database is 149762.
Desktop speed score of astron.nl (69/100) is better than the results of 49.24% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of astron.nl (64/100) is better than the results of 11.2% of other sites and means that the page is not mobile-friendly.
Mobile speed score of astron.nl (55/100) is better than the results of 43.86% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
Advertisement
astron.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.
astron.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: astron.nl
Status: active
Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands
Abuse Contact:
+31.887873000
cert@surfcert.nl
Creation Date: 1997-05-01
Updated Date: 2015-11-25
DNSSEC: no
Domain nameservers:
ns1.surfnet.nl
dns1.astron.nl 195.169.155.28
dns2.astron.nl 195.169.155.30
Record maintained by: SIDN BV
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 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 SIDN.
(c) SIDN BV, Dutch Copyright Act, protection of authors' rights
(Section 10, subsection 1, clause 1).
Status: active
Registrar:
SURF B.V.
Moreelsepark 48
3511EP Utrecht
Netherlands
Abuse Contact:
+31.887873000
cert@surfcert.nl
Creation Date: 1997-05-01
Updated Date: 2015-11-25
DNSSEC: no
Domain nameservers:
ns1.surfnet.nl
dns1.astron.nl 195.169.155.28
dns2.astron.nl 195.169.155.30
Record maintained by: SIDN BV
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 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 SIDN.
(c) SIDN BV, Dutch Copyright Act, protection of authors' rights
(Section 10, subsection 1, clause 1).
astron.nl server information
Servers Location
astron.nl desktop page speed rank
Last tested: 2015-12-03
Desktop Speed
Medium
69/100
astron.nl Desktop Speed Test Quick Summary
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astron.nl Desktop Resource Breakdown
| Total Resources | 73 |
| Number of Hosts | 5 |
| Static Resources | 70 |
| JavaScript Resources | 13 |
| CSS Resources | 19 |
astron.nl mobile page speed rank
Last tested: 2017-06-01
Mobile Speed
Bad
55/100
astron.nl Mobile Speed Test Quick Summary
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priority - 4Reduce server response time
priority - 1Leverage browser caching
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astron.nl Mobile Resource Breakdown
| Total Resources | 68 |
| Number of Hosts | 4 |
| Static Resources | 66 |
| JavaScript Resources | 13 |
| CSS Resources | 19 |
astron.nl mobile page usability
Last tested: 2017-06-01
Mobile Usability
Bad
64/100
astron.nl 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.
Netherlands In…adio Astronomy renders only 4 pixels tall (11 CSS pixels).intranet and 2 others render only 4 pixels tall (11 CSS pixels).A renders only 4 pixels tall (11 CSS pixels).A renders only 6 pixels tall (15 CSS pixels).A renders only 7 pixels tall (19 CSS pixels).Radio Observatory and 5 others render only 5 pixels tall (12 CSS pixels).ASTRON renders only 5 pixels tall (14 CSS pixels).DAILY IMAGE renders only 4 pixels tall (11 CSS pixels).THE DWINGELOO CODE OF CONDUCT and 7 others render only 4 pixels tall (11 CSS pixels).CONTACT INFORMATION renders only 5 pixels tall (13 CSS pixels).ASTRON is the…ical research. and 5 others render only 4 pixels tall (11 CSS pixels).More contact information renders only 4 pixels tall (11 CSS pixels).Apertif: a new radio 'camera' and 8 others render only 4 pixels tall (11 CSS pixels).Conference: Th…ency Observing and 7 others render only 4 pixels tall (11 CSS pixels).EVENTS and 1 others render only 5 pixels tall (13 CSS pixels).Astronomers pi…y far-far away and 3 others render only 4 pixels tall (11 CSS pixels).An important m…. Because o... and 4 others render only 4 pixels tall (11 CSS pixels).More ASTRON news and 4 others render only 4 pixels tall (11 CSS pixels).20/02/2017 - 09:27 and 3 others render only 4 pixels tall (11 CSS pixels).Upcoming Events and 1 others render only 5 pixels tall (13 CSS pixels).19-21 June: C…RF-techniek : and 7 others render only 4 pixels tall (11 CSS pixels).VOL renders only 4 pixels tall (11 CSS pixels).Cursus Toegepaste RF Techniek and 1 others render only 4 pixels tall (11 CSS pixels).Thomas Marsh - renders only 4 pixels tall (11 CSS pixels).A white dwarf pulsar renders only 4 pixels tall (11 CSS pixels).Disclaimer and 4 others render only 4 pixels tall (11 CSS pixels).. © 2017 ASTRON and 2 others render only 3 pixels tall (9 CSS pixels).Kuenst and 1 others render only 3 pixels tall (9 CSS pixels).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.
priority - 6Size 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="/about-astron/…ct-information">contact</a> and 1 others are close to other tap targets.The tap target
<a href="#" class="setfont_small">A</a> is close to 1 other tap targets.The tap target
<a href="#" class="setfont_reset">A</a> is close to 1 other tap targets.The tap target
<a href="/" class="active">Home</a> and 1 others are close to other tap targets.The tap target
<a href="http://www.ast…nl/dailyimage/" class="menu_link external">Daily Image</a> is close to 1 other tap targets.The tap target
<a href="/about-astron/…oom/press-room">News room</a> and 7 others are close to other tap targets.The tap target
<a href="https://www.asterics2020.eu" class="rcol_link external">ASTERICS</a> and 5 others are close to other tap targets.The tap target
<a href="/about-astron/…ss-public/news" class="link_readmore">More ASTRON news</a> is close to 4 other tap targets.The tap target
<a href="/ska-aip2017/">SKA AIP Meeting</a> and 7 others are close to other tap targets.The tap target
<a href="http://www.ast…F/RFCursus.htm" class="external">Cursus Toegepaste RF Techniek</a> is close to 1 other tap targets.The tap target
<input id="edit-search-block-form-1" type="text" name="search_block_form" class="form-text"> is close to 2 other tap targets.The tap target
<a href="/">Home</a> and 2 others are close to other tap targets.priority - 3Size content to viewport
The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 1,100 CSS pixels wide, but the viewport is only 980 CSS pixels wide. The following elements fall outside the viewport:
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
The element
<a href="#" class="setfont_big">A</a> falls outside the viewport.The element
<div id="q_mainmenu_sub">HomeNews room…Publications</div> falls outside the viewport.The element
<input id="edit-search-block-form-1" type="text" name="search_block_form" class="form-text"> falls outside the viewport.The element
<p></p> falls outside the viewport.The element
<a href="/about-astron/…oom/press-room" class="rcol_link">ASTRON in the media</a> falls outside the viewport.The element
<a href="/sites/astron.…Winter2016.pdf" class="rcol_link external">ASTRON News Winter 2016</a> falls outside the viewport.The element
<hr> falls outside the viewport.The element
<a href="http://annualreports.astron.nl" class="rcol_link">Annual report 2014/2015</a> falls outside the viewport.The element
<hr> falls outside the viewport.The element
<p></p> falls outside the viewport.The element
<a href="/general/lofar/lofar" class="rcol_link">LOFAR Telescope</a> falls outside the viewport.The element
<hr> falls outside the viewport.The element
<a href="/general/squar…ilometre-array" class="rcol_link">Square Kilometre Array</a> falls outside the viewport.The element
<hr> falls outside the viewport.The element
<div class="img_shadow_wrap"></div> falls outside the viewport.The element
<a href="/astronomy-gro…pertif/apertif" class="rcol_link">Apertif: a new radio 'camera'</a> falls outside the viewport.The element
<div id="q_right_bottom"></div> falls outside the viewport.The element
<div id="q_bottom">Design: Kuenst…© 2017 ASTRON</div> falls outside the viewport.astron.nl HTML validation
Errors
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Line: 1 Column: 1 - 121
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."
"...<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html..."
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Line: 13 Column: 1 - 69
"...13 74 --> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link..."
"...13 74 --> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <link..."
Bad value “screen, projection” for attribute “media” on element “link”: Deprecated media type “projection”. For guidance, see the Media Types section in the current Media Queries specification.
Line: 32 Column: 1 - 117
"...t/css" /> <link rel="alternate stylesheet" href="/q_incl/css/big.css" media="screen, projection" title="big" type="text/css" /> <link..." Line: 33 Column: 1 - 121
"...t/css" /> <link rel="alternate stylesheet" href="/q_incl/css/small.css" media="screen, projection" title="small" type="text/css" /> <!--[..."
"...t/css" /> <link rel="alternate stylesheet" href="/q_incl/css/big.css" media="screen, projection" title="big" type="text/css" /> <link..." Line: 33 Column: 1 - 121
"...t/css" /> <link rel="alternate stylesheet" href="/q_incl/css/small.css" media="screen, projection" title="small" type="text/css" /> <!--[..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 889 Column: 56 - 157
"...="_blank"><img border="0" height="31" width="72" src="/sites/astron.nl/files/cms/DOME%20header%20website.jpg" /></a> <..." Line: 892 Column: 55 - 130
"...t="blank"><img height="60" width="85" src="/sites/astron.nl/files/cms/asterics.png" /> </a> ..." Line: 895 Column: 48 - 126
"...="_blank"><img height="30" width="220" src="/sites/astron.nl/files/cms/Logo_NWO-I.jpg" /></a> <..." Line: 995 Column: 123 - 200
"...="_blank"><img src="/sites/astron.nl/files/cms/Facebook17.png" height="22" width="22" /></a> ..." Line: 995 Column: 263 - 339
"...="_blank"><img src="/sites/astron.nl/files/cms/Twitter17.png" height="22" width="22" /></a> ..." Line: 995 Column: 412 - 489
"...="_blank"><img src="/sites/astron.nl/files/cms/linkedin17.png" height="22" width="22" /></a> <..." Line: 996 Column: 64 - 140
"...="_blank"><img src="/sites/astron.nl/files/cms/youtube17.png" height="22" width="31" /></a> <..." Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..." Line: 1013 Column: 32 - 173
"...ar/lofar"><img src="/sites/astron.nl/files/cms/thumb_Low%20Band%20Antennes2%20LOFAR%20credit%20Hans%20Hordijk.jpg" border="0" height="80" width="100" /></a> ..." Line: 1023 Column: 44 - 166
".../apertif"><img src="/sites/astron.nl/files/cms/thumb_Apertif2%20cropped.jpg" border="0" height="76" width="100" class="img_shadow" /></a><a..."
"...="_blank"><img border="0" height="31" width="72" src="/sites/astron.nl/files/cms/DOME%20header%20website.jpg" /></a> <..." Line: 892 Column: 55 - 130
"...t="blank"><img height="60" width="85" src="/sites/astron.nl/files/cms/asterics.png" /> </a> ..." Line: 895 Column: 48 - 126
"...="_blank"><img height="30" width="220" src="/sites/astron.nl/files/cms/Logo_NWO-I.jpg" /></a> <..." Line: 995 Column: 123 - 200
"...="_blank"><img src="/sites/astron.nl/files/cms/Facebook17.png" height="22" width="22" /></a> ..." Line: 995 Column: 263 - 339
"...="_blank"><img src="/sites/astron.nl/files/cms/Twitter17.png" height="22" width="22" /></a> ..." Line: 995 Column: 412 - 489
"...="_blank"><img src="/sites/astron.nl/files/cms/linkedin17.png" height="22" width="22" /></a> <..." Line: 996 Column: 64 - 140
"...="_blank"><img src="/sites/astron.nl/files/cms/youtube17.png" height="22" width="31" /></a> <..." Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..." Line: 1013 Column: 32 - 173
"...ar/lofar"><img src="/sites/astron.nl/files/cms/thumb_Low%20Band%20Antennes2%20LOFAR%20credit%20Hans%20Hordijk.jpg" border="0" height="80" width="100" /></a> ..." Line: 1023 Column: 44 - 166
".../apertif"><img src="/sites/astron.nl/files/cms/thumb_Apertif2%20cropped.jpg" border="0" height="76" width="100" class="img_shadow" /></a><a..."
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Line: 938 Column: 290 - 292
"...s_teaser"><p> The N..." Line: 940 Column: 278 - 280
"...s_teaser"><p> Astro..."
"...s_teaser"><p> The N..." Line: 940 Column: 278 - 280
"...s_teaser"><p> Astro..."
Stray end tag “span”.
Line: 939 Column: 170 - 176
"... Petro... </span><a hre..." Line: 941 Column: 170 - 176
"...atter ... </span><a hre..."
"... Petro... </span><a hre..." Line: 941 Column: 170 - 176
"...atter ... </span><a hre..."
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Line: 939 Column: 256 - 284
"...d more</a><div class="front_news_date">17/07/..." Line: 941 Column: 250 - 278
"...d more</a><div class="front_news_date">16/07/..."
"...d more</a><div class="front_news_date">17/07/..." Line: 941 Column: 250 - 278
"...d more</a><div class="front_news_date">16/07/..."
End tag “div” seen, but there were open elements.
Line: 939 Column: 309 - 314
"...3:13</div></div></div>..." Line: 941 Column: 303 - 308
"...0:52</div></div></div>..."
"...3:13</div></div></div>..." Line: 941 Column: 303 - 308
"...0:52</div></div></div>..."
Unclosed element “span”.
Line: 938 Column: 258 - 289
"...s</a></h3><span class="front_news_teaser"><p> Th..." Line: 940 Column: 246 - 277
"... </a></h3><span class="front_news_teaser"><p> As..."
"...s</a></h3><span class="front_news_teaser"><p> Th..." Line: 940 Column: 246 - 277
"... </a></h3><span class="front_news_teaser"><p> As..."
The “font” element is obsolete. Use CSS instead.
Line: 958 Column: 232 - 250
"... : <font color="#000"> Stas ..." Line: 958 Column: 275 - 293
"...- </font> <font color="#000">Univer..." Line: 959 Column: 15 - 36
"... <font color="#666666">TBA</f..." Line: 960 Column: 23 - 41
"... : <font color="#000"> Mike ..." Line: 960 Column: 62 - 80
"...- </font> <font color="#000">Univer..." Line: 961 Column: 15 - 36
"... <font color="#666666">TBA</f..."
"... : <font color="#000"> Stas ..." Line: 958 Column: 275 - 293
"...- </font> <font color="#000">Univer..." Line: 959 Column: 15 - 36
"... <font color="#666666">TBA</f..." Line: 960 Column: 23 - 41
"... : <font color="#000"> Mike ..." Line: 960 Column: 62 - 80
"...- </font> <font color="#000">Univer..." Line: 961 Column: 15 - 36
"... <font color="#666666">TBA</f..."
Attribute “width” not allowed on element “a” at this point.
Line: 967 Column: 1 - 329
"...t"><br /> <a href="https://twitter.com/ASTRON_LOFAR" class="twitter-timeline" data-widget-id="360032405349871617" data-theme="light" data-link-color="#1388d2" data-chrome="nofooter transparent" data-tweet-limit="5" data-show-replies="false" data-related="twitterapi,twitter" data-aria-polite="assertive" width="600" height="400" lang="EN">Tweets..."
"...t"><br /> <a href="https://twitter.com/ASTRON_LOFAR" class="twitter-timeline" data-widget-id="360032405349871617" data-theme="light" data-link-color="#1388d2" data-chrome="nofooter transparent" data-tweet-limit="5" data-show-replies="false" data-related="twitterapi,twitter" data-aria-polite="assertive" width="600" height="400" lang="EN">Tweets..."
Attribute “height” not allowed on element “a” at this point.
Line: 967 Column: 1 - 329
"...t"><br /> <a href="https://twitter.com/ASTRON_LOFAR" class="twitter-timeline" data-widget-id="360032405349871617" data-theme="light" data-link-color="#1388d2" data-chrome="nofooter transparent" data-tweet-limit="5" data-show-replies="false" data-related="twitterapi,twitter" data-aria-polite="assertive" width="600" height="400" lang="EN">Tweets..."
"...t"><br /> <a href="https://twitter.com/ASTRON_LOFAR" class="twitter-timeline" data-widget-id="360032405349871617" data-theme="light" data-link-color="#1388d2" data-chrome="nofooter transparent" data-tweet-limit="5" data-show-replies="false" data-related="twitterapi,twitter" data-aria-polite="assertive" width="600" height="400" lang="EN">Tweets..."
The “hspace” attribute on the “img” element is obsolete. Use CSS instead.
Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..."
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..."
The “vspace” attribute on the “img” element is obsolete. Use CSS instead.
Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..."
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..."
Warnings
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Line: 886 Column: 46 - 149
"...="_blank"><img border="0" height="34" width="120" src="/sites/astron.nl/files/cms/logo_jive_120.png" alt="Jive" /></a> <..." Line: 889 Column: 56 - 157
"...="_blank"><img border="0" height="31" width="72" src="/sites/astron.nl/files/cms/DOME%20header%20website.jpg" /></a> <..." Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..." Line: 1013 Column: 32 - 173
"...ar/lofar"><img src="/sites/astron.nl/files/cms/thumb_Low%20Band%20Antennes2%20LOFAR%20credit%20Hans%20Hordijk.jpg" border="0" height="80" width="100" /></a> ..." Line: 1020 Column: 66 - 194
"...re-array"><img src="/sites/astron.nl/files/cms/thumb_dense_aperture_array_close_300dpi.jpg" border="0" height="67" width="100" alt="SKA" /></a> <..." Line: 1023 Column: 44 - 166
".../apertif"><img src="/sites/astron.nl/files/cms/thumb_Apertif2%20cropped.jpg" border="0" height="76" width="100" class="img_shadow" /></a><a..."
"...="_blank"><img border="0" height="34" width="120" src="/sites/astron.nl/files/cms/logo_jive_120.png" alt="Jive" /></a> <..." Line: 889 Column: 56 - 157
"...="_blank"><img border="0" height="31" width="72" src="/sites/astron.nl/files/cms/DOME%20header%20website.jpg" /></a> <..." Line: 1009 Column: 62 - 174
"...="_blank"><img src="/sites/astron.nl/files/cms/annual2016.jpg" border="0" height="80" hspace="-1" vspace="0" width="100" /></a> <..." Line: 1013 Column: 32 - 173
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astron.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.
astron.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.