leiden.edu Website Information
Daily Unique Visits: 44,385
Daily Page Views: 266,310
Income Per Day: $533
Estimated Value: $383,760
This website is located in Netherlands and is using following IP address 132.229.13.193. See the complete list of popular websites hosted in Netherlands.
leiden.edu is registered under .EDU top-level domain. Please check other sites in .EDU zone.
Website leiden.edu is using the following name servers:
- violet.leidenuniv.nl
- indigo.leidenuniv.nl
- ns1.surfnet.nl
and is probably hosted by SURFnet bv. See the full list of other websites hosted by SURFnet bv.
The highest website leiden.edu position in Alexa rank database was 28035 and the lowest rank position was 999424. Current position of leiden.edu in Alexa rank database is 32313.
Desktop speed score of leiden.edu (71/100) is better than the results of 52.66% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of leiden.edu (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 leiden.edu (42/100) is better than the results of 21.5% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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leiden.edu 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.
leiden.edu 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.
This Registry database contains ONLY .EDU domains.
The data in the EDUCAUSE Whois database is provided
by EDUCAUSE for information purposes in order to
assist in the process of obtaining information about
or related to .edu domain registration records.
The EDUCAUSE Whois database is authoritative for the
.EDU domain.
A Web interface for the .EDU EDUCAUSE Whois Server is
available at: http://whois.educause.edu
By submitting a Whois query, you agree that this information
will not be used to allow, enable, or otherwise support
the transmission of unsolicited commercial advertising or
solicitations via e-mail. The use of electronic processes to
harvest information from this server is generally prohibited
except as reasonably necessary to register or modify .edu
domain names.
-------------------------------------------------------------
Domain Name: LEIDEN.EDU
Registrant:
Leiden University
Rapenburg 70
Leiden, 2311 EZ
Netherlands
Administrative Contact:
Erik Rietkerk
Universiteit Leiden, ISSC
Niels Bohrweg
Leiden, 2333 CA
Netherlands
+31.715276957
postmaster@leidenuniv.nl
Technical Contact:
Anthony Pasqual
Universiteit Leiden, ISSC
Niels Bohrweg 1
Leiden, 2333 CA
Netherlands
+31.715276988
postmaster@leidenuniv.nl
Name Servers:
NS1.SURFNET.NL
NS3.SURFNET.NL
NS2.SURFNET.NL
Domain record activated: 04-Dec-2000
Domain record last updated: 19-Feb-2024
Domain expires: 31-Jul-2026
The data in the EDUCAUSE Whois database is provided
by EDUCAUSE for information purposes in order to
assist in the process of obtaining information about
or related to .edu domain registration records.
The EDUCAUSE Whois database is authoritative for the
.EDU domain.
A Web interface for the .EDU EDUCAUSE Whois Server is
available at: http://whois.educause.edu
By submitting a Whois query, you agree that this information
will not be used to allow, enable, or otherwise support
the transmission of unsolicited commercial advertising or
solicitations via e-mail. The use of electronic processes to
harvest information from this server is generally prohibited
except as reasonably necessary to register or modify .edu
domain names.
-------------------------------------------------------------
Domain Name: LEIDEN.EDU
Registrant:
Leiden University
Rapenburg 70
Leiden, 2311 EZ
Netherlands
Administrative Contact:
Erik Rietkerk
Universiteit Leiden, ISSC
Niels Bohrweg
Leiden, 2333 CA
Netherlands
+31.715276957
postmaster@leidenuniv.nl
Technical Contact:
Anthony Pasqual
Universiteit Leiden, ISSC
Niels Bohrweg 1
Leiden, 2333 CA
Netherlands
+31.715276988
postmaster@leidenuniv.nl
Name Servers:
NS1.SURFNET.NL
NS3.SURFNET.NL
NS2.SURFNET.NL
Domain record activated: 04-Dec-2000
Domain record last updated: 19-Feb-2024
Domain expires: 31-Jul-2026
leiden.edu server information
Servers Location
leiden.edu desktop page speed rank
Last tested: 2016-11-21
Desktop Speed
Medium
71/100
leiden.edu Desktop Speed Test Quick Summary
priority - 19Enable compression
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priority - 9Leverage 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.
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http://www.universiteitleiden.nl/ul2ext/styles/screen.css (expiration not specified)
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http://www.google-analytics.com/ga.js (2 hours)
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http://www.universiteitleiden.nl/ul2ext/images/home-default.jpg (expiration not specified)
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http://www.universiteitleiden.nl/ul2ext/images/mainnavborder.png (expiration not specified)
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http://www.universiteitleiden.nl/ul2ext/images/world-map.png (expiration not specified)
http://www.universiteitleiden.nl/ul2ext/images/zegel.png (expiration not specified)
http://www.universiteitleiden.nl/ul2ext/scripts/jquery-1.11.2.min.js (expiration not specified)
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priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking script resources and 2 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
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http://www.universiteitleiden.nl/ul2ext/scripts/picturefill.min.js
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Optimize CSS Delivery of the following:
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priority - 2Reduce server response time
priority - 1Minify CSS
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priority - 1Optimize images
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priority - 0Minify HTML
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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 3KiB (32% reduction).
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leiden.edu Desktop Resource Breakdown
| Total Resources | 29 |
| Number of Hosts | 4 |
| Static Resources | 24 |
| JavaScript Resources | 8 |
| CSS Resources | 2 |
leiden.edu mobile page speed rank
Last tested: 2017-11-20
Mobile Speed
Bad
42/100
leiden.edu Mobile Speed Test Quick Summary
priority - 72Optimize images
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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://leiden.edu/
http://www.universiteitleiden.nl/en
https://www.universiteitleiden.nl/en
http://www.universiteitleiden.nl/en
https://www.universiteitleiden.nl/en
priority - 16Enable compression
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priority - 16Eliminate 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.universiteitleiden.nl/en/ul2external/s…s/screen.css?v=1.65.03
priority - 12Leverage 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.universiteitleiden.nl/binaries/content…dmund-amann.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…oomstamkano.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…ie_amann.jpg/d1400xvar (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…tie_amann.jpg/d480xvar (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…ge-headers/werving.png (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…leidenasiayear_jpg.jpg (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…indigenous-peoples.jpg (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…-identiteit.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/en/ul2common/images/world-map.png (expiration not specified)
https://www.universiteitleiden.nl/en/ul2common/images/zegel.png (expiration not specified)
https://www.universiteitleiden.nl/scripts/ul2.js (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-MR67S7X (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/406354889733074?v=2.8.1 (20 minutes)
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https://www.google-analytics.com/analytics.js (2 hours)
https://www.universiteitleiden.nl/binaries/content…oomstamkano.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…ie_amann.jpg/d1400xvar (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…tie_amann.jpg/d480xvar (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…ge-headers/werving.png (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…leidenasiayear_jpg.jpg (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…indigenous-peoples.jpg (expiration not specified)
https://www.universiteitleiden.nl/binaries/content…-identiteit.jpg/d50x50 (expiration not specified)
https://www.universiteitleiden.nl/en/ul2common/images/world-map.png (expiration not specified)
https://www.universiteitleiden.nl/en/ul2common/images/zegel.png (expiration not specified)
https://www.universiteitleiden.nl/scripts/ul2.js (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-MR67S7X (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/406354889733074?v=2.8.1 (20 minutes)
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priority - 8Prioritize visible content
Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.
The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.
Only about 57% of the final above-the-fold content could be rendered with the full HTML response.
priority - 0Minify HTML
Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.
Minify HTML for the following resources to reduce their size by 4.5KiB (23% reduction).
Minifying https://www.universiteitleiden.nl/en could save 4.5KiB (23% reduction).
leiden.edu Mobile Resource Breakdown
| Total Resources | 39 |
| Number of Hosts | 10 |
| Static Resources | 16 |
| JavaScript Resources | 15 |
| CSS Resources | 1 |
leiden.edu mobile page usability
Last tested: 2017-11-20
Mobile Usability
Good
99/100
leiden.edu 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 type="button" class="option">All</button> is close to 1 other tap targets.The tap target
<a href="#" class="toggle-nav">Menu</a> is close to 1 other tap targets.The tap target
<a href="https://www.un…tion/bachelors">Bachelor's programmes</a> and 4 others are close to other tap targets.leiden.edu HTML validation
Errors
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Line: 180 Column: 9 - 820
"...> <img src="/binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d480xvar" srcset="/binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d480xvar 480w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d1400xvar 1400w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d1920xvar 1920w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d3000xvar 3000w" data-bgset=".home-hero" alt="" /> ..."
"...> <img src="/binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d480xvar" srcset="/binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d480xvar 480w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d1400xvar 1400w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d1920xvar 1920w, /binaries/content/gallery/ul2/main-images/humanities/lucas/2018-07-19-header-carolijn-brouwer.jpg/2018-07-19-header-carolijn-brouwer.jpg/d3000xvar 3000w" data-bgset=".home-hero" alt="" /> ..."
Warnings
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
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"...s</p> <h1>Bravin..."
"...s</p> <h1>Bravin..."
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leiden.edu 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.
leiden.edu 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.