ptb.de Website Information

Daily Unique Visits: 67,700

Daily Page Views: 406,200

Income Per Day: $812

Estimated Value: $584,640

This website is located in Germany and is using following IP address 192.53.103.142. See the complete list of popular websites hosted in Germany.

ptb.de is registered under .DE top-level domain. Please check other sites in .DE zone.

Website ptb.de is using the following name servers:

dns-3.dfn.de
dns-1.dfn.de
dns-2.dfn.de
ns1.ptb.de

and is probably hosted by Verein zur Foerderung eines Deutschen Forschungsnetzes e.V.. See the full list of other websites hosted by Verein zur Foerderung eines Deutschen Forschungsnetzes e.V..

The highest website ptb.de position in Alexa rank database was 6049 and the lowest rank position was 998207. Current position of ptb.de in Alexa rank database is 21185.

Desktop speed score of ptb.de (60/100) is better than the results of 35.69% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of ptb.de (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 ptb.de (49/100) is better than the results of 31.99% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

ptb.de 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.

ptb.de 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: ptb.de
Status: connect

ptb.de server information

Servers Location

ptb.de desktop page speed rank

Last tested: 2017-05-18

Desktop Speed Bad

60/100

ptb.de Desktop Speed Test Quick Summary

priority - 34Enable 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 334.7KiB (72% reduction).

Compressing https://uhr.ptb.de/socket.io/socket.io.js could save 134.9KiB (74% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/js2/jque…11.3.min.js?1431530949 could save 61.2KiB (65% reduction).
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priority - 12Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 13 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://www.ptb.de/cms/fileadmin/templates/js2/jque…11.3.min.js?1431530949
http://www.ptb.de/cms/fileadmin/templates/js2/shopdisplay.js?1472117680
http://www.ptb.de/cms/fileadmin/templates/js2/jque…heel.min.js?1418019537
http://www.ptb.de/cms/fileadmin/templates/js2/gateway.js?1431533619
http://www.ptb.de/cms/fileadmin/templates/js2/overviewnav.js?1437593369
http://www.ptb.de/cms/fileadmin/templates/js2/html5shiv.js?1418019536
http://www.ptb.de/cms/fileadmin/templates/js2/html…rintshiv.js?1418019536
http://www.ptb.de/cms/fileadmin/templates/js2/resp…cher.min.js?1418019554
http://www.ptb.de/cms/fileadmin/templates/js2/ausklapper.js?1460569056
http://www.ptb.de/cms/fileadmin/templates/js2/publications.js?1418019537
http://www.ptb.de/cms/fileadmin/templates/js2/Calendar.js?1448988877
http://www.ptb.de/cms/fileadmin/templates/js2/jque…rter.min.js?1418019537
http://www.ptb.de/cms/typo3temp/javascript_9a38f34785.js?1427711359

Optimize CSS Delivery of the following:

http://www.ptb.de/cms/fileadmin/templates/css3/news-basic.css?1484816627
http://www.ptb.de/cms/typo3temp/stylesheet_b8e5b015d9.css?1431938913
http://www.ptb.de/cms/fileadmin/templates/css3/main.css?1470394108
http://www.ptb.de/cms/fileadmin/templates/css3/basics.css?1489048194
http://www.ptb.de/cms/fileadmin/templates/css3/gateway.css?1418019445
http://www.ptb.de/cms/fileadmin/templates/css3/publications.css?1480527235
http://www.ptb.de/cms/fileadmin/templates/css3/calendar.css?1448988979
http://www.ptb.de/cms/fileadmin/templates/css3/cssstyletypo3.css?1474383894
http://www.ptb.de/cms/fileadmin/templates/extensio…ensions.css?1493300305
http://www.ptb.de/cms/fileadmin/templates/css3/homepage.css?1480527159
http://www.ptb.de/cms/fileadmin/templates/css3/responsive/mobile.css
http://www.ptb.de/cms/fileadmin/templates/css3/responsive/large.css

priority - 10Minify 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 94.8KiB (46% reduction).

Minifying https://uhr.ptb.de/socket.io/socket.io.js could save 83.8KiB (47% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/js2/ausklapper.js?1460569056 could save 2.7KiB (54% reduction).
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Minifying https://uhr.ptb.de/uhr.js could save 1.4KiB (45% reduction) after compression.
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priority - 7Optimize images

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

Optimize the following images to reduce their size by 68.5KiB (35% reduction).

Compressing http://www.ptb.de/cms/fileadmin/internet/_processe…09_536a_9880ae8036.jpg could save 15KiB (38% reduction).
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priority - 4Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 40.1KiB (32% reduction).

Minifying http://www.ptb.de/cms/fileadmin/templates/extensio…ensions.css?1493300305 could save 5.9KiB (23% reduction).
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Minifying http://www.ptb.de/cms/fileadmin/templates/css3/news-basic.css?1484816627 could save 2.7KiB (35% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/responsive/small.css could save 2.5KiB (52% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/responsive/x-small.css could save 2.4KiB (48% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/publications.css?1480527235 could save 1.5KiB (44% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/responsive/medium.css could save 1.4KiB (49% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/main.css?1470394108 could save 1.2KiB (26% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/calendar.css?1448988979 could save 1.1KiB (29% reduction).
Minifying http://www.ptb.de/cms/fileadmin/templates/css3/print.css?1435227015 could save 941B (25% reduction).

priority - 3Avoid 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://ptb.de/
http://www.ptb.de/
http://www.ptb.de/cms/

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://uhr.ptb.de/knockout.js (expiration not specified)
https://uhr.ptb.de/socket.io/socket.io.js (expiration not specified)
https://uhr.ptb.de/uhr.js (expiration not specified)

ptb.de Desktop Resource Breakdown

Total Resources	130
Number of Hosts	3
Static Resources	69
JavaScript Resources	20
CSS Resources	17

ptb.de mobile page speed rank

Last tested: 2017-05-18

Mobile Speed Bad

49/100

ptb.de Mobile Speed Test Quick Summary

priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 13 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 34Enable 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 334.7KiB (72% reduction).

priority - 10Minify 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 94.8KiB (46% reduction).

priority - 10Avoid 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://ptb.de/
http://www.ptb.de/
http://www.ptb.de/cms/

priority - 7Optimize images

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

Optimize the following images to reduce their size by 72.2KiB (36% reduction).

Compressing http://www.ptb.de/cms/fileadmin/internet/_processe…09_536a_9880ae8036.jpg could save 15KiB (38% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_Co…taebe13_efe9f28146.jpg could save 10.8KiB (39% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_In…I_Titel_a29cceaa3f.jpg could save 9.1KiB (41% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_Ul…ortrait_23646769ae.jpg could save 6KiB (35% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_Ti…_Heft_1_2e3435c19b.jpg could save 5.7KiB (36% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_Ti…017_1_d_4bc9219ae0.jpg could save 4.9KiB (24% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_jb…elblatt_a7442d7def.jpg could save 3.1KiB (36% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/assets/logos/logo_ptb.png could save 3.1KiB (35% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/assets/icons/search.png could save 2.7KiB (78% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/assets/icons/arrow-white-down.png could save 2.7KiB (88% reduction).
Compressing http://www.ptb.de/cms/fileadmin/internet/_processe…ngnahme_e963a54dc4.jpg could save 2.6KiB (27% reduction).
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Compressing http://www.ptb.de/cms/fileadmin/templates/assets/icons/leichte-sprache.gif could save 1.1KiB (68% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/assets/icons/gebaerdensprache.gif could save 1.1KiB (66% reduction).
Compressing http://www.ptb.de/cms/fileadmin/templates/assets/responsive/show_navi.gif could save 1.1KiB (88% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_igsm-logo-sw_bf10791137.png could save 761B (12% reduction).
Compressing http://www.ptb.de/cms/fileadmin/_processed_/csm_qu…logo-sw_20f98c588d.png could save 639B (17% reduction).

priority - 4Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 40.1KiB (32% reduction).

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://uhr.ptb.de/knockout.js (expiration not specified)
https://uhr.ptb.de/socket.io/socket.io.js (expiration not specified)
https://uhr.ptb.de/uhr.js (expiration not specified)

ptb.de Mobile Resource Breakdown

Total Resources	133
Number of Hosts	3
Static Resources	72
JavaScript Resources	20
CSS Resources	17

ptb.de mobile page usability

Last tested: 2017-05-18

Mobile Usability Good

99/100

ptb.de 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="https://uhr.ptb.de">PTB-Uhr</a> and 1 others are close to other tap targets.
The tap target <a href="nc/service-sei…20540660c727ab">31</a> is close to 1 other tap targets.
The tap target <a href="presseaktuelle…/ptb-news.html"></a> and 2 others are close to other tap targets.
The tap target <a href="#prev"></a> is close to 2 other tap targets.

ptb.de HTML validation

Errors

A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.

Line: 10 Column: 325 - 386
"...t</title> <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1"> <meta..."

A document must not include more than one “meta” element with its “name” attribute set to the value “description”.

Line: 77 Column: 312 - 605
"..."Home" /> <meta name="description" content="Die Physikalisch-Technische Bundesanstalt (PTB), Braunschweig und Berlin, ist das nationale Metrologie-Institut mit wissenschaftlich-technischen Dienstleistungsaufgaben. Sie misst mit höchster Genauigkeit und Zuverlässigkeit – Metrologie als Kernkompetenz." /> <meta..."

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

Line: 77 Column: 1151 - 1201
"...wesen" /> <meta http-equiv="content-language" content="de" /> <meta..."

The “scheme” attribute on the “meta” element is obsolete. Use only one scheme per field, or make the scheme declaration part of the value.

Line: 77 Column: 1203 - 1262
"...t="de" /> <meta name="DC.Language" scheme="NISOZ39.50" content="de" /> <meta..."

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

Line: 164 Column: 10 - 33
"... <div id="countcound2si"></div>..."

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

Line: 203 Column: 101 - 139
"...s="time"> <span id="ptbTime" class="currenttime"></span..." Line: 203 Column: 148 - 186
"..."></span> <span id="ptbLocalTimezone" class="tz"></span..."

The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.

Line: 203 Column: 195 - 201
"..."></span> </time> <span..."

The “summary” attribute on the “table” element is obsolete. Consider describing the structure of the “table” in a “caption” element or in a “figure” element containing the “table”; or, simplify the structure of the “table” so that no description is needed.

Line: 209 Column: 30 - 67
"...ss="cal"> <table summary="Kalender August 2018"> <thea..."

End tag “section” seen, but there were open elements.

Line: 270 Column: 13 - 22
"... </section> ..."

Unclosed element “div”.

Line: 208 Column: 11 - 29
"... <div class="inner"> <time..."

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Line: 77 Column: 3 - 51
"...script> <meta name="viewport" content="user-scalable=no"><meta ..."

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Line: 84 Column: 410 - 433
"...</section><section class="subnav"><ul><l..." Line: 96 Column: 471 - 494
"...</section><section class="subnav"><ul><l..." Line: 106 Column: 370 - 393
"...</section><section class="subnav"><ul><l..." Line: 118 Column: 99 - 122
"...</section><section class="subnav"><ul><l..." Line: 128 Column: 100 - 123
"...</section><section class="subnav"><ul><l..." Line: 132 Column: 103 - 126
"...</section><section class="subnav"><ul><l..." Line: 154 Column: 5 - 26
"...ader> <section id="content"> <main..." Line: 332 Column: 129 - 153
".../section> <section class="partner"> ..."

Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.

Line: 173 Column: 32 - 85
"...colright"><article id="c114985" class="csc-default textpic s-0"> ..." Line: 304 Column: 36 - 82
"...rticles"> <article class="articletype-0" data-uid="8927"> <time..." Line: 304 Column: 516 - 562
".../article> <article class="articletype-0" data-uid="8918"> <time..." Line: 304 Column: 999 - 1045
".../article> <article class="articletype-0" data-uid="8892"> <time..." Line: 304 Column: 1531 - 1577
".../article> <article class="articletype-0" data-uid="8890"> <time..." Line: 304 Column: 2001 - 2047
".../article> <article class="articletype-0" data-uid="8729"> <time..." Line: 304 Column: 2490 - 2536
".../article> <article class="articletype-0" data-uid="8869"> <time..." Line: 304 Column: 3054 - 3100
".../article> <article class="articletype-0" data-uid="8865"> <time..." Line: 304 Column: 3562 - 3608
".../article> <article class="articletype-0" data-uid="8860"> <time..." Line: 304 Column: 4022 - 4068
".../article> <article class="articletype-0" data-uid="8859"> <time..." Line: 304 Column: 4546 - 4592
".../article> <article class="articletype-0" data-uid="8864"> <time..." Line: 323 Column: 33 - 95
"...colright"><article id="c80007" class="csc-default textpic s-0 std small"> ..."

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).

Line: 316 Column: 48 - 51
"...eader-n1"><h1>Die PT..."

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ptb.de 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.

ptb.de 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.

PTB.DE Physikalisch-Technische Bundesanstalt

ptb.de Website Information

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ptb.de desktop page speed rank

ptb.de Desktop Speed Test Quick Summary

priority - 34Enable 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 334.7KiB (72% reduction).

priority - 12Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 13 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 10Minify 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 94.8KiB (46% reduction).

priority - 7Optimize images

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

Optimize the following images to reduce their size by 68.5KiB (35% reduction).

priority - 4Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 40.1KiB (32% reduction).

priority - 3Avoid 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.

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:

ptb.de Desktop Resource Breakdown

ptb.de mobile page speed rank

ptb.de Mobile Speed Test Quick Summary

priority - 48Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 13 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

priority - 34Enable 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 334.7KiB (72% reduction).

priority - 10Minify 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 94.8KiB (46% reduction).

priority - 10Avoid 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.

priority - 7Optimize images

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

Optimize the following images to reduce their size by 72.2KiB (36% reduction).

priority - 4Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

Minify CSS for the following resources to reduce their size by 40.1KiB (32% reduction).

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:

ptb.de Mobile Resource Breakdown

ptb.de mobile page usability

ptb.de 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.

ptb.de HTML validation

Errors

A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.

A document must not include more than one “meta” element with its “name” attribute set to the value “description”.

Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.

The “scheme” attribute on the “meta” element is obsolete. Use only one scheme per field, or make the scheme declaration part of the value.

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

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

The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.

The “summary” attribute on the “table” element is obsolete. Consider describing the structure of the “table” in a “caption” element or in a “figure” element containing the “table”; or, simplify the structure of the “table” so that no description is needed.

End tag “section” seen, but there were open elements.

Unclosed element “div”.

Warnings

Consider avoiding viewport values that prevent users from resizing documents.

Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.

Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.

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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