kb.nl Website Information

Daily Unique Visits: 93,532

Daily Page Views: 561,192

Income Per Day: $1,122

Estimated Value: $807,840

This website is located in Netherlands and is using following IP address 192.87.165.105. See the complete list of popular websites hosted in Netherlands.

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

Website kb.nl is using the following name servers:

ns1.zurich.surf.net
ns1.surfnet.nl
ns1-konbib.kb.nl

and is probably hosted by SURFnet bv. See the full list of other websites hosted by SURFnet bv.

The highest website kb.nl position in Alexa rank database was 12799 and the lowest rank position was 979024. Current position of kb.nl in Alexa rank database is 15334.

Desktop speed score of kb.nl (55/100) is better than the results of 29.37% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of kb.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 kb.nl (40/100) is better than the results of 18.97% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

kb.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.

kb.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: kb.nl
Status: active

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

Abuse Contact:
+31.887873000
cert@surfcert.nl

DNSSEC: yes

Domain nameservers:
ns1-konbib.kb.nl 192.87.31.175
ns1.zurich.surf.net
ns1.surfnet.nl

Creation Date: 1997-06-13

Updated Date: 2024-08-28

Record maintained by: SIDN BV

kb.nl server information

Servers Location

kb.nl desktop page speed rank

Last tested: 2018-07-05

Desktop Speed Bad

55/100

kb.nl Desktop Speed Test Quick Summary

priority - 46Optimize images

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

Optimize the following images to reduce their size by 453.3KiB (71% reduction).

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Compressing https://www.kb.nl/sites/all/themes/kb/images/pixel.jpg could save 1.3KiB (82% reduction).
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Compressing https://www.kb.nl/sites/all/themes/kb/images/rss.png could save 247B (42% reduction).
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Compressing https://www.kb.nl/sites/all/themes/kb/images/bulletbg2.png could save 190B (29% reduction).
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priority - 14Leverage 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.kb.nl/sites/all/themes/kb/images/bulletbg2.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/bulletbg3.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/button_aanmelden.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/extlink_blue.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/facebook.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/instagram.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/link-arrowright-light.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/linkedin.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/menu-arrowdown-dark.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/menu.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/pixel.jpg (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/rss.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/search_button.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/twitter.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/youtube.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/kblogo.svg (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_Bpri…BO3sz9pEcGrk3Ot7u8.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_YfYF…yWbDwRoMfHEou9qfC8.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_bMlu…DHu23oxpkSVF0ZNOwo.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_u8qT…V5_2oZ6vHslJTGAAlU.css (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_7ReXHo…fpiGAcbGR1zLslB21Qw.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_NWW-3J…17W355E6HOx5i7srW-I.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_O8ZkWo…BCqiu1gbfWjtRB4nUrM.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_hM-hng…oPtdkvOLM_h0eTtfXAk.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_jOpGsR…nwUpOSur2Y_HcNf_LGM.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_nYyWvR…eaCoLfVG9ppKe9QFjRE.js (expiration not specified)
https://www.kb.nl/sites/default/files/kattendijkekroniek_0.png (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-TSFW3F (15 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 14Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.kb.nl/sites/default/files/js/js_O8ZkWo…BCqiu1gbfWjtRB4nUrM.js
https://www.kb.nl/sites/default/files/js/js_7ReXHo…fpiGAcbGR1zLslB21Qw.js
https://www.kb.nl/sites/default/files/js/js_hM-hng…oPtdkvOLM_h0eTtfXAk.js
https://www.kb.nl/sites/default/files/js/js_nYyWvR…eaCoLfVG9ppKe9QFjRE.js
https://www.kb.nl/sites/default/files/js/js_jOpGsR…nwUpOSur2Y_HcNf_LGM.js

Optimize CSS Delivery of the following:

https://www.kb.nl/sites/default/files/css/css_YfYF…yWbDwRoMfHEou9qfC8.css
https://www.kb.nl/sites/default/files/css/css_u8qT…V5_2oZ6vHslJTGAAlU.css
https://www.kb.nl/sites/default/files/css/css_Bpri…BO3sz9pEcGrk3Ot7u8.css
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext
https://www.kb.nl/sites/default/files/css/css_bMlu…DHu23oxpkSVF0ZNOwo.css
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext

priority - 10Enable 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 96.4KiB (70% reduction).

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Compressing https://www.kb.nl/sites/all/themes/kb/kblogo.svg could save 22.7KiB (70% reduction).
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priority - 5Minify 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 44.1KiB (29% reduction).

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kb.nl Desktop Resource Breakdown

Total Resources	45
Number of Hosts	6
Static Resources	30
JavaScript Resources	8
CSS Resources	5

kb.nl mobile page speed rank

Last tested: 2018-06-09

Mobile Speed Bad

40/100

kb.nl Mobile Speed Test Quick Summary

priority - 56Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

https://www.kb.nl/sites/default/files/css/css_GzYE…dL-JzKOqSxhMwEJ0Aw.css
https://www.kb.nl/sites/default/files/css/css_u8qT…V5_2oZ6vHslJTGAAlU.css
https://www.kb.nl/sites/default/files/css/css_Bpri…BO3sz9pEcGrk3Ot7u8.css
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext
https://www.kb.nl/sites/default/files/css/css_bMlu…DHu23oxpkSVF0ZNOwo.css
https://fonts.googleapis.com/css?family=PT+Serif:4…subset=latin,latin-ext

priority - 47Optimize images

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

Optimize the following images to reduce their size by 462.4KiB (72% reduction).

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priority - 31Enable 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 302.7KiB (73% reduction).

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priority - 22Leverage 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.kb.nl/sites/all/themes/kb/images/bulletbg2.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/bulletbg3.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/button_aanmelden.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/extlink_blue.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/facebook.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/instagram.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/link-arrowright-light.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/linkedin.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/menu-arrowdown-dark.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/menu.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/pixel.jpg (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/rss.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/search_button.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/twitter.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/images/youtube.png (expiration not specified)
https://www.kb.nl/sites/all/themes/kb/kblogo_simple.svg (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_Bpri…BO3sz9pEcGrk3Ot7u8.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_GzYE…dL-JzKOqSxhMwEJ0Aw.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_bMlu…DHu23oxpkSVF0ZNOwo.css (expiration not specified)
https://www.kb.nl/sites/default/files/css/css_u8qT…V5_2oZ6vHslJTGAAlU.css (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_7ReXHo…fpiGAcbGR1zLslB21Qw.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_NWW-3J…17W355E6HOx5i7srW-I.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_O8ZkWo…BCqiu1gbfWjtRB4nUrM.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_hM-hng…oPtdkvOLM_h0eTtfXAk.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_jOpGsR…nwUpOSur2Y_HcNf_LGM.js (expiration not specified)
https://www.kb.nl/sites/default/files/js/js_nYyWvR…eaCoLfVG9ppKe9QFjRE.js (expiration not specified)
https://www.kb.nl/sites/default/files/kattendijkekroniek_0.png (expiration not specified)
https://www.googletagmanager.com/gtm.js?id=GTM-TSFW3F (15 minutes)
https://www.google-analytics.com/analytics.js (2 hours)

priority - 7Minify 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 66.5KiB (25% reduction).

Minifying https://www.kb.nl/sites/default/files/js/js_7ReXHo…fpiGAcbGR1zLslB21Qw.js could save 18.9KiB (36% reduction).
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kb.nl Mobile Resource Breakdown

Total Resources	46
Number of Hosts	6
Static Resources	30
JavaScript Resources	8
CSS Resources	5

kb.nl mobile page usability

Last tested: 2018-06-09

Mobile Usability Good

99/100

kb.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 <a href="/" class="list-item-class active active">nl</a> is close to 1 other tap targets.

The tap target <a href="/en" class="list-item-class">en</a> is close to 2 other tap targets.

The tap target <div id="search-button"> is close to 1 other tap targets.

The tap target <input id="edit-submit--2" type="submit" name="op" class="form-submit"> is close to 1 other tap targets.

kb.nl HTML validation

Errors

A “charset” attribute on a “meta” element found after the first 1024 bytes.

Line: 10 Column: - 23
"... charset="utf-8" /> <link rel=..."

A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.

Line: 11 Column: 1 - 154
"...utf-8" /> <link rel="apple-touch-icon-precomposed" href="https://www.kb.nl/sites/all/themes/omega/omega/apple-touch-icon-precomposed-114x114.png" sizes="114x114" /> <meta..." Line: 17 Column: 1 - 150
"...vocab" /> <link rel="apple-touch-icon-precomposed" href="https://www.kb.nl/sites/all/themes/omega/omega/apple-touch-icon-precomposed-72x72.png" sizes="72x72" /> <link..." Line: 18 Column: 1 - 154
"...72x72" /> <link rel="apple-touch-icon-precomposed" href="https://www.kb.nl/sites/all/themes/omega/omega/apple-touch-icon-precomposed-144x144.png" sizes="144x144" /> <link..."

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

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

Duplicate attribute “id”.

Line: 86 Column: - 78
"...search-form" id="block-search-..."

Duplicate attribute “class”.

Line: 86 Column: - 118
"...="search" class="block block--..." Line: 90 Column: - 29
"..."content" class="block__conten..." Line: 351 Column: - 143
"...ems-full" class="paragraphs-it..." Line: 355 Column: - 98
"...typeof="" class="entity entity..."

Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Line: 327 Column: 34 - 60
"..."> <div class="field--linkje"><a hre..."

Start tag “a” seen but an element of the same type was already open.

Line: 327 Column: 117 - 137
"...in-de-kb"><a href="node/26282">Lees d..." Line: 365 Column: 5 - 18
"...kje"> <a href="/ob">Ga naa..."

Stray end tag “a”.

Line: 327 Column: 183 - 186
"...ialist</a></a></div>..."

Attribute “about” not allowed on element “article” at this point.

Line: 342 Column: 49 - 175
"... <article about="/home" typeof="sioc:Item foaf:Document" role="article" class="node node--pagina node--full node--pagina--full"> ..."

Attribute “content” not allowed on element “span” at this point.

Line: 344 Column: 19 - 91
"... <span property="dc:title" content="Home" class="rdf-meta element-hidden"></span..." Line: 344 Column: 99 - 199
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..."

Attribute “datatype” not allowed on element “span” at this point.

Line: 344 Column: 99 - 199
"...n"></span><span property="sioc:num_replies" content="0" datatype="xsd:integer" class="rdf-meta element-hidden"></span..."

Attribute “about” not allowed on element “div” at this point.

Line: 355 Column: 1 - 160
"...ef="/ob"> <div class="entity entity-paragraphs-item paragraphs-item-banner-rechts" about="" typeof="" class="entity entity-paragraphs-item paragraphs-item-banner-rechts"> <di..."

End tag “a” violates nesting rules.

Line: 365 Column: 5 - 18
"...kje"> <a href="/ob">Ga naa..."

Cannot recover after last error. Any further errors will be ignored.

Line: 365 Column: 5 - 18
"...kje"> <a href="/ob">Ga naa..."

Warnings

The “banner” role is unnecessary for element “header”.

Line: 57 Column: 5 - 43
"...n</a> <header class="l-header" role="banner"> <div ..."

The “navigation” role is unnecessary for element “nav”.

Line: 73 Column: 1 - 101
"...v> </div> <nav id="block-menu-block-21" role="navigation" class="block block--menu-block block--menu-block-21"> ..."

The “article” role is unnecessary for element “article”.

Line: 342 Column: 49 - 175
"... <article about="/home" typeof="sioc:Item foaf:Document" role="article" class="node node--pagina node--full node--pagina--full"> ..."

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kb.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.

kb.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.

KB.NL KB, nationale bibliotheek

kb.nl Website Information

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Servers Location

kb.nl desktop page speed rank

kb.nl Desktop Speed Test Quick Summary

priority - 46Optimize images

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

Optimize the following images to reduce their size by 453.3KiB (71% reduction).

priority - 14Leverage 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:

priority - 14Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 10Enable 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 96.4KiB (70% reduction).

priority - 5Minify 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 44.1KiB (29% reduction).

kb.nl Desktop Resource Breakdown

kb.nl mobile page speed rank

kb.nl Mobile Speed Test Quick Summary

priority - 56Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 7 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 47Optimize images

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

Optimize the following images to reduce their size by 462.4KiB (72% reduction).

priority - 31Enable 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 302.7KiB (73% reduction).

priority - 22Leverage 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:

priority - 7Minify 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 66.5KiB (25% reduction).

kb.nl Mobile Resource Breakdown

kb.nl mobile page usability

kb.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.

kb.nl HTML validation

Errors

A “charset” attribute on a “meta” element found after the first 1024 bytes.

A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.

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

Duplicate attribute “id”.

Duplicate attribute “class”.

Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)

Start tag “a” seen but an element of the same type was already open.

Stray end tag “a”.

Attribute “about” not allowed on element “article” at this point.

Attribute “content” not allowed on element “span” at this point.

Attribute “datatype” not allowed on element “span” at this point.

Attribute “about” not allowed on element “div” at this point.

End tag “a” violates nesting rules.

Cannot recover after last error. Any further errors will be ignored.

Warnings

The “banner” role is unnecessary for element “header”.

The “navigation” role is unnecessary for element “nav”.

The “article” role is unnecessary for element “article”.

kb.nl similar domains

kb.nl Ping

kb.nl TRACEROUTE