osa.org Website Information

Daily Unique Visits: 70,291

Daily Page Views: 421,746

Income Per Day: $843

Estimated Value: $606,960

This website is located in United States and is using following IP address 65.202.222.221. See the complete list of popular websites hosted in United States.

osa.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.

Website osa.org is using the following name servers:

yogi.osa.org
yogi2.osa.org

and is probably hosted by COGENT-174 - Cogent Communications, US. See the full list of other websites hosted by COGENT-174 - Cogent Communications, US.

The highest website osa.org position in Alexa rank database was 3922 and the lowest rank position was 981153. Current position of osa.org in Alexa rank database is 20404.

Desktop speed score of osa.org (64/100) is better than the results of 41.34% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of osa.org (98/100) is better than the results of 55.61% of other sites and means that the page is mobile-friendly.

Mobile speed score of osa.org (56/100) is better than the results of 45.93% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

osa.org 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.

osa.org 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: OSA.ORG
Registry Domain ID: D588718-LROR
Registrar WHOIS Server: whois.networksolutions.com
Registrar URL: http://www.networksolutions.com
Updated Date: 2020-12-08T16:35:26Z
Creation Date: 1993-01-04T05:00:00Z
Registry Expiry Date: 2023-01-03T05:00:00Z
Registrar Registration Expiration Date:
Registrar: Network Solutions, LLC
Registrar IANA ID: 2
Registrar Abuse Contact Email: abuse@web.com
Registrar Abuse Contact Phone: +1.8003337680
Reseller:
Domain Status: ok https://icann.org/epp#ok
Registrant Organization: Optical Society of America
Registrant State/Province: DC
Registrant Country: US
Name Server: YOGI.OSA.ORG
Name Server: YOGI2.OSA.ORG
Name Server: NS1.OSA.ORG
Name Server: NS2.OSA.ORG
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form https://www.icann.org/wicf/)
>>> Last update of WHOIS database: 2021-05-06T06:45:09Z

osa.org server information

Servers Location

osa.org desktop page speed rank

Last tested: 2017-12-01

Desktop Speed Bad

64/100

osa.org Desktop Speed Test Quick Summary

priority - 42Optimize images

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

Optimize the following images to reduce their size by 408.6KiB (51% reduction).

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priority - 8Leverage 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:

http://www.osa.org/CMSPages/GetResource.ashx?_webparts=677 (10 minutes)
http://www.osa.org/getmedia/45ab1bfb-48dd-4eb2-ab6…00&height=185&ext=.jpg (10 minutes)
http://www.google-analytics.com/ga.js (2 hours)
http://www.osa.org/osaorg/js/vendor/modernizr-2.6.….1.0.min.js?v=07012013 (24 hours)
http://www.osa.org/osaorg/js/vendor/royalslider/default/rs-default.css (24 hours)
http://www.osa.org/osaorg/js/vendor/royalslider/mi…home-slider-arrows.png (24 hours)
http://www.osa.org/osaorg/js/vendor/royalslider/mi…e/rs-minimal-white.css (24 hours)
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http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg (24 hours)
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http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg (24 hours)
http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg (24 hours)
http://www.osa.org/osaorg/media/osa.media/OSAF/Ger…ile_image.jpg?ext=.jpg (24 hours)
http://www.osa.org/osaorg/media/osa.media/OSAF/OFC2017-370-2.jpg?ext=.jpg (24 hours)
http://www.osa.org/osaorg/media/osa.media/siteimag…ogo-centennial-150.png (24 hours)
http://www.osa.org/osaorg/media/osa.media/siteimages/search-btn-white.png (24 hours)
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priority - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

http://www.osa.org/osaorg/js/vendor/modernizr-2.6.….1.0.min.js?v=07012013
http://www.osa.org/WebResource.axd?d=VoA0aUJkU2hza…1&t=635792874349294682
http://www.osa.org/ScriptResource.axd?d=RZ7m4Pa-4X…fTCg7flJTg2&t=7c776dc1
http://www.osa.org/ScriptResource.axd?d=RDKk3Bqjf0…LUfO7Qw1eQ2&t=7c776dc1
http://www.osa.org/CMSPages/PortalTemplate.aspx?_T…%3aeffe2a26%3a7e63a579

Optimize CSS Delivery of the following:

http://fonts.googleapis.com/css?family=Open+Sans:4…300italic&subset=latin
http://www.osa.org/osaorg/css/mainBS3.css??v=05312016
http://www.osa.org/CMSPages/GetResource.ashx?_webparts=677

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://osa.org/
http://www.osa.org/
http://www.osa.org/en-us/home/

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 524B (12% reduction).

Minifying http://www.osa.org/WebResource.axd?d=VoA0aUJkU2hza…1&t=635792874349294682 could save 524B (12% reduction) after compression.

osa.org Desktop Resource Breakdown

Total Resources	50
Number of Hosts	10
Static Resources	24
JavaScript Resources	9
CSS Resources	6

osa.org mobile page speed rank

Last tested: 2017-11-30

Mobile Speed Bad

56/100

osa.org Mobile Speed Test Quick Summary

priority - 39Optimize images

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

Optimize the following images to reduce their size by 384.7KiB (46% reduction).

Compressing http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg could save 67.4KiB (47% reduction).
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Compressing https://www.osa-opn.org/opn/media/Images/Articles/…-Dec17.jpg?ext=.jpg%3E could save 59.9KiB (52% reduction).
Compressing http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg could save 59.9KiB (48% reduction).
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Compressing http://www.osa.org/osaorg/media/osa.media/OSAF/Ger…ile_image.jpg?ext=.jpg could save 39.6KiB (86% reduction).
Compressing http://www.osa.org/osaorg/media/osa.media/Headline…-1095x380.jpg?ext=.jpg could save 32.5KiB (38% reduction).
Compressing http://www.osa.org/osaorg/media/osa.media/OSAF/OFC2017-370-2.jpg?ext=.jpg could save 14.6KiB (28% reduction).
Compressing http://www.osa.org/osaorg/js/vendor/royalslider/mi…home-slider-arrows.png could save 976B (67% reduction).
Compressing https://www.osapublishing.org/getThumbnail.cfm?uri=jocn-9-12-1202 could save 946B (31% reduction).
Compressing https://www.osapublishing.org/getThumbnail.cfm?uri=optica-4-12-1503 could save 900B (25% reduction).
Compressing http://www.osa.org/osaorg/media/osa.media/siteimages/search-btn.png could save 811B (67% reduction).

priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

http://fonts.googleapis.com/css?family=Open+Sans:4…300italic&subset=latin
http://www.osa.org/osaorg/css/mainBS3.css??v=05312016
http://www.osa.org/CMSPages/GetResource.ashx?_webparts=677

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:

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://osa.org/
http://www.osa.org/
http://www.osa.org/en-us/home/

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 524B (12% reduction).

Minifying http://www.osa.org/WebResource.axd?d=VoA0aUJkU2hza…1&t=635792874349294682 could save 524B (12% reduction) after compression.

osa.org Mobile Resource Breakdown

Total Resources	50
Number of Hosts	10
Static Resources	24
JavaScript Resources	9
CSS Resources	6

osa.org mobile page usability

Last tested: 2017-11-30

Mobile Usability Good

98/100

osa.org Mobile Usability Test Quick Summary

priority - 1Size 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 <div class="rsArrow rsArrowLeft"></div> and 1 others are close to other tap targets.

The tap target <a href="/join">Become a Member</a> and 13 others are close to other tap targets.

The tap target <a href="/en-us/meeting…/registration/" class="blurb_link">Register Now</a> and 5 others are close to other tap targets.

osa.org HTML validation

Errors

Duplicate attribute “class”.

Line: 153 Column: - 130
"...=%2fHome' class='headerLink'>L..."

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

Line: 153 Column: 349 - 418
"...A</a></li><ul class="utilityNav visible-xs-block visible-sm-block hidden-print"> <li ..."

Bad value “http://www.osa-opn.org/opn/media/Images/Articles/2017/1712/Features/Kentico-Cover-Dec17.jpg?ext=.jpg>” for attribute “src” on element “img”: Illegal character in query: “>” is not allowed.

Line: 298 Column: 72 - 244
"...ber_2017"><img class="pull-right" src="http://www.osa-opn.org/opn/media/Images/Articles/2017/1712/Features/Kentico-Cover-Dec17.jpg?ext=.jpg>" style="padding-left:5px; width:150px;" /></a> ..."

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

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

Line: 410 Column: 46 - 104
"...ad--date"><span content="12/6/2017 11:44:24 AM" itemprop="startDate"> 06<..." Line: 412 Column: 7 - 63
"... - <span content="5/11/2018 11:46:49 PM" itemprop="endDate">11&nbs..." Line: 437 Column: 46 - 105
"...ad--date"><span content="12/13/2017 12:00:00 AM" itemprop="startDate"> 13<..." Line: 439 Column: 7 - 64
"... - <span content="12/13/2017 12:00:00 AM" itemprop="endDate">13&nbs..." Line: 464 Column: 46 - 104
"...ad--date"><span content="3/11/2018 12:00:00 AM" itemprop="startDate"> 11<..." Line: 466 Column: 7 - 63
"... - <span content="3/11/2018 12:00:00 AM" itemprop="endDate">11&nbs..." Line: 491 Column: 46 - 104
"...ad--date"><span content="3/11/2018 12:00:00 AM" itemprop="startDate"> 11<..." Line: 493 Column: 7 - 63
"... - <span content="3/15/2018 11:59:00 PM" itemprop="endDate">15&nbs..." Line: 518 Column: 46 - 104
"...ad--date"><span content="3/12/2018 12:00:00 AM" itemprop="startDate"> 12<..." Line: 520 Column: 7 - 63
"... - <span content="3/12/2018 12:00:00 AM" itemprop="endDate">12&nbs..." Line: 569 Column: 46 - 104
"...ad--date"><span content="12/6/2017 11:44:24 AM" itemprop="startDate"> 06<..." Line: 571 Column: 7 - 63
"... - <span content="5/11/2018 11:46:49 PM" itemprop="endDate">11&nbs..." Line: 596 Column: 46 - 105
"...ad--date"><span content="12/13/2017 12:00:00 AM" itemprop="startDate"> 13<..." Line: 598 Column: 7 - 64
"... - <span content="12/13/2017 12:00:00 AM" itemprop="endDate">13&nbs..."

The “itemprop” attribute was specified, but the element is not a property of any item.

Line: 408 Column: 1 - 85
"...el-body"> <article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 409 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 409 Column: 41 - 169
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/incubator_meetings/osa_integrated_photonics_in_the_mid-ir_incubator/">OSA In..." Line: 410 Column: 46 - 104
"...ad--date"><span content="12/6/2017 11:44:24 AM" itemprop="startDate"> 06<..." Line: 412 Column: 7 - 63
"... - <span content="5/11/2018 11:46:49 PM" itemprop="endDate">11&nbs..." Line: 413 Column: 3 - 61
"...</span> <meta itemprop="endDate" content="5/11/2018 11:46:49 PM" /> </p..." Line: 417 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 418 Column: 5 - 26
"...ace"> <span itemprop="name">OSA He..." Line: 419 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 420 Column: 4 - 36
"...ress"> <span itemprop="addressLocality">Washin..." Line: 421 Column: 4 - 34
"...span> <span itemprop="addressRegion">Distri..." Line: 424 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 435 Column: 11 - 95
"...</article><article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 436 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 436 Column: 41 - 174
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/global_calendar/events/oida_webinar_new_milestones_in_coherent_optical_p/">OIDA W..." Line: 437 Column: 46 - 105
"...ad--date"><span content="12/13/2017 12:00:00 AM" itemprop="startDate"> 13<..." Line: 439 Column: 7 - 64
"... - <span content="12/13/2017 12:00:00 AM" itemprop="endDate">13&nbs..." Line: 440 Column: 3 - 62
"...</span> <meta itemprop="endDate" content="12/13/2017 12:00:00 AM" /> </p..." Line: 444 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 445 Column: 5 - 26
"...ace"> <span itemprop="name"></span..." Line: 446 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 447 Column: 4 - 36
"...ress"> <span itemprop="addressLocality"></span..." Line: 448 Column: 4 - 34
"...span> <span itemprop="addressRegion">Online..." Line: 451 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 462 Column: 11 - 95
"...</article><article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 463 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 463 Column: 41 - 175
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/global_calendar/events/2018_oida_workshop_on_scalable_integrated_photonic/">2018 O..." Line: 464 Column: 46 - 104
"...ad--date"><span content="3/11/2018 12:00:00 AM" itemprop="startDate"> 11<..." Line: 466 Column: 7 - 63
"... - <span content="3/11/2018 12:00:00 AM" itemprop="endDate">11&nbs..." Line: 467 Column: 3 - 61
"...</span> <meta itemprop="endDate" content="3/11/2018 12:00:00 AM" /> </p..." Line: 471 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 472 Column: 5 - 26
"...ace"> <span itemprop="name">San Di..." Line: 473 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 474 Column: 4 - 36
"...ress"> <span itemprop="addressLocality">San Di..." Line: 475 Column: 4 - 34
"...span> <span itemprop="addressRegion">Califo..." Line: 478 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 489 Column: 11 - 95
"...</article><article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 490 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 490 Column: 41 - 175
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/global_calendar/events/the_optical_fiber_communication_conference_and_(2)/">The Op..." Line: 491 Column: 46 - 104
"...ad--date"><span content="3/11/2018 12:00:00 AM" itemprop="startDate"> 11<..." Line: 493 Column: 7 - 63
"... - <span content="3/15/2018 11:59:00 PM" itemprop="endDate">15&nbs..." Line: 494 Column: 3 - 61
"...</span> <meta itemprop="endDate" content="3/15/2018 11:59:00 PM" /> </p..." Line: 498 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 499 Column: 5 - 26
"...ace"> <span itemprop="name">San Di..." Line: 500 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 501 Column: 4 - 36
"...ress"> <span itemprop="addressLocality">San Di..." Line: 502 Column: 4 - 34
"...span> <span itemprop="addressRegion">Califo..." Line: 505 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 516 Column: 11 - 95
"...</article><article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 517 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 517 Column: 41 - 150
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/global_calendar/events/2018_oida_executive_forum/">2018 O..." Line: 518 Column: 46 - 104
"...ad--date"><span content="3/12/2018 12:00:00 AM" itemprop="startDate"> 12<..." Line: 520 Column: 7 - 63
"... - <span content="3/12/2018 12:00:00 AM" itemprop="endDate">12&nbs..." Line: 521 Column: 3 - 61
"...</span> <meta itemprop="endDate" content="3/12/2018 12:00:00 AM" /> </p..." Line: 525 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 526 Column: 5 - 26
"...ace"> <span itemprop="name">Hilton..." Line: 527 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 528 Column: 4 - 36
"...ress"> <span itemprop="addressLocality">San Di..." Line: 529 Column: 4 - 34
"...span> <span itemprop="addressRegion">Califo..." Line: 532 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 567 Column: 1 - 85
"...ents</h3> <article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 568 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 568 Column: 41 - 169
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/incubator_meetings/osa_integrated_photonics_in_the_mid-ir_incubator/">OSA In..." Line: 569 Column: 46 - 104
"...ad--date"><span content="12/6/2017 11:44:24 AM" itemprop="startDate"> 06<..." Line: 571 Column: 7 - 63
"... - <span content="5/11/2018 11:46:49 PM" itemprop="endDate">11&nbs..." Line: 572 Column: 3 - 61
"...</span> <meta itemprop="endDate" content="5/11/2018 11:46:49 PM" /> </p..." Line: 576 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 577 Column: 5 - 26
"...ace"> <span itemprop="name">OSA He..." Line: 578 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 579 Column: 4 - 36
"...ress"> <span itemprop="addressLocality">Washin..." Line: 580 Column: 4 - 34
"...span> <span itemprop="addressRegion">Distri..." Line: 583 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..." Line: 594 Column: 11 - 95
"...</article><article class="blurb" itemprop="event" itemscope itemtype="http://schema.org/Event"> <h4 ..." Line: 595 Column: 2 - 40
".../Event"> <h4 class="blurb_head" itemprop="name"><a cla..." Line: 595 Column: 41 - 174
"...op="name"><a class="blurb_link" itemprop="url" href="/en-us/meetings/global_calendar/events/oida_webinar_new_milestones_in_coherent_optical_p/">OIDA W..." Line: 596 Column: 46 - 105
"...ad--date"><span content="12/13/2017 12:00:00 AM" itemprop="startDate"> 13<..." Line: 598 Column: 7 - 64
"... - <span content="12/13/2017 12:00:00 AM" itemprop="endDate">13&nbs..." Line: 599 Column: 3 - 62
"...</span> <meta itemprop="endDate" content="12/13/2017 12:00:00 AM" /> </p..." Line: 603 Column: 3 - 73
"..._body"> <span itemprop="location" itemscope itemtype="http://schema.org/Place"> <..." Line: 604 Column: 5 - 26
"...ace"> <span itemprop="name"></span..." Line: 605 Column: 6 - 99
"...an> <span class="address" itemprop="address" itemscope itemtype="http://schema.org/PostalAddress"> <s..." Line: 606 Column: 4 - 36
"...ress"> <span itemprop="addressLocality"></span..." Line: 607 Column: 4 - 34
"...span> <span itemprop="addressRegion">Online..." Line: 610 Column: 4 - 35
".../span> <span itemprop="addressCountry"> ..."

Warnings

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

Line: 220 Column: 1 - 42
"...</header> <nav class="mainNavBar" role="navigation"> <ul c..."

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

Line: 628 Column: 6 - 28
"...g </h3><article class="blurb"><p cla..."

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

Line: 639 Column: 48 - 105
"...r__block"><section class="blurb_container blurb_container--inverse"><p cla..."

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

Line: 2 Column: 16 - 8
"...TYPE html> <html > <head..."

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osa.org 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.

osa.org 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.

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osa.org desktop page speed rank

osa.org Desktop Speed Test Quick Summary

priority - 42Optimize images

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

Optimize the following images to reduce their size by 408.6KiB (51% reduction).

priority - 8Leverage 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 - 6Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

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 - 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 524B (12% reduction).

osa.org Desktop Resource Breakdown

osa.org mobile page speed rank

osa.org Mobile Speed Test Quick Summary

priority - 39Optimize images

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

Optimize the following images to reduce their size by 384.7KiB (46% reduction).

priority - 24Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 5 blocking script resources and 3 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

Optimize CSS Delivery of the following:

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:

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 - 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 524B (12% reduction).

osa.org Mobile Resource Breakdown

osa.org mobile page usability

osa.org Mobile Usability Test Quick Summary

priority - 1Size 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.

osa.org HTML validation

Errors

Duplicate attribute “class”.

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

Bad value “http://www.osa-opn.org/opn/media/Images/Articles/2017/1712/Features/Kentico-Cover-Dec17.jpg?ext=.jpg>” for attribute “src” on element “img”: Illegal character in query: “>” is not allowed.

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

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

The “itemprop” attribute was specified, but the element is not a property of any item.

Warnings

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

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

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

This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.

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osa.org Ping

osa.org TRACEROUTE