nand2tetris.org Website Information
Daily Unique Visits: 7,155
Daily Page Views: 35,775
Income Per Day: $89
Estimated Value: $53,400
This website is located in United States and is using following IP address 23.236.62.147. See the complete list of popular websites hosted in United States.
nand2tetris.org is registered under .ORG top-level domain. Please check other sites in .ORG zone.
Website nand2tetris.org is using the following name servers:
- ns8.wixdns.net
- ns9.wixdns.net
and is probably hosted by Wix.com Ltd.. See the full list of other websites hosted by Wix.com Ltd..
The highest website nand2tetris.org position in Alexa rank database was 16259 and the lowest rank position was 990012. Current position of nand2tetris.org in Alexa rank database is 190430.
Desktop speed score of nand2tetris.org (93/100) is better than the results of 91.83% of other sites and shows that the page is performing great on desktop computers.
Mobile usability score of nand2tetris.org (68/100) is better than the results of 19.67% of other sites and means that the page is not mobile-friendly.
Mobile speed score of nand2tetris.org (88/100) is better than the results of 91.94% of other sites and shows that the landing page performance on mobile devices is excellent.
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nand2tetris.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.
nand2tetris.org whois
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Domain Name: nand2tetris.org
Registry Domain ID: c443c114fcda423d9ab2581290a65af0-LROR
Registrar WHOIS Server: http://whois.godaddy.com
Registrar URL: http://www.whois.godaddy.com
Updated Date: 2024-06-26T07:06:01Z
Creation Date: 2011-12-25T17:37:06Z
Registry Expiry Date: 2025-12-25T17:37:06Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
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Name Server: ns8.wixdns.net
Name Server: ns9.wixdns.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-10-08T14:10:48Z
Registry Domain ID: c443c114fcda423d9ab2581290a65af0-LROR
Registrar WHOIS Server: http://whois.godaddy.com
Registrar URL: http://www.whois.godaddy.com
Updated Date: 2024-06-26T07:06:01Z
Creation Date: 2011-12-25T17:37:06Z
Registry Expiry Date: 2025-12-25T17:37:06Z
Registrar: GoDaddy.com, LLC
Registrar IANA ID: 146
Registrar Abuse Contact Email: abuse@godaddy.com
Registrar Abuse Contact Phone: +1.4806242505
Domain Status: clientDeleteProhibited https://icann.org/epp#clientDeleteProhibited
Domain Status: clientRenewProhibited https://icann.org/epp#clientRenewProhibited
Domain Status: clientTransferProhibited https://icann.org/epp#clientTransferProhibited
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Registry Registrant ID: REDACTED FOR PRIVACY
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Registrant State/Province: Arizona
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Registrant Country: US
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Name Server: ns8.wixdns.net
Name Server: ns9.wixdns.net
DNSSEC: unsigned
URL of the ICANN Whois Inaccuracy Complaint Form: https://www.icann.org/wicf/
>>> Last update of WHOIS database: 2024-10-08T14:10:48Z
nand2tetris.org server information
Servers Location
nand2tetris.org desktop page speed rank
Last tested: 2016-11-21
Desktop Speed
Good
93/100
nand2tetris.org Desktop Speed Test Quick Summary
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:
http://nand2tetris.org/banner.png (expiration not specified)
http://nand2tetris.org/style/compatible_chrome.gif (expiration not specified)
http://nand2tetris.org/style/compatible_firefox.gif (expiration not specified)
http://nand2tetris.org/style/style.css (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
http://nand2tetris.org/style/compatible_chrome.gif (expiration not specified)
http://nand2tetris.org/style/compatible_firefox.gif (expiration not specified)
http://nand2tetris.org/style/style.css (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
priority - 2Eliminate 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:
http://nand2tetris.org/style/style.css
priority - 1Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 13.9KiB (65% reduction).
Compressing and resizing http://nand2tetris.org/banner.png could save 13.9KiB (65% reduction).
nand2tetris.org Desktop Resource Breakdown
| Total Resources | 17 |
| Number of Hosts | 8 |
| Static Resources | 9 |
| JavaScript Resources | 5 |
| CSS Resources | 2 |
nand2tetris.org mobile page speed rank
Last tested: 2016-11-21
Mobile Speed
Good
88/100
nand2tetris.org Mobile Speed Test Quick Summary
priority - 8Eliminate 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:
http://nand2tetris.org/style/style.css
priority - 4Leverage 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://nand2tetris.org/banner.png (expiration not specified)
http://nand2tetris.org/style/compatible_chrome.gif (expiration not specified)
http://nand2tetris.org/style/compatible_firefox.gif (expiration not specified)
http://nand2tetris.org/style/style.css (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
http://nand2tetris.org/style/compatible_chrome.gif (expiration not specified)
http://nand2tetris.org/style/compatible_firefox.gif (expiration not specified)
http://nand2tetris.org/style/style.css (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
nand2tetris.org Mobile Resource Breakdown
| Total Resources | 18 |
| Number of Hosts | 8 |
| Static Resources | 10 |
| JavaScript Resources | 5 |
| CSS Resources | 2 |
nand2tetris.org mobile page usability
Last tested: 2016-11-21
Mobile Usability
Medium
68/100
nand2tetris.org Mobile Usability Test Quick Summary
priority - 31Use 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.
From NAND to Tetris renders only 8 pixels tall (20 CSS pixels).Building a Mod…rst Principles renders only 5 pixels tall (14 CSS pixels).Home renders only 5 pixels tall (14 CSS pixels).Stay in Touch and 10 others render only 5 pixels tall (14 CSS pixels).The official c…Tetris courses renders only 6 pixels tall (16 CSS pixels).The materials…s you see fit. and 9 others render only 5 pixels tall (14 CSS pixels).The Elements o…puting Systems and 5 others render only 5 pixels tall (14 CSS pixels).Nand2Tetris in…l (10 minutes) renders only 5 pixels tall (14 CSS pixels).From Nand to T…is In 12 Steps renders only 7 pixels tall (18 CSS pixels).Your browser d…ats available. renders only 5 pixels tall (14 CSS pixels).Click here to…t HTML5 video. renders only 5 pixels tall (14 CSS pixels).Designed and b…Tali Gutman © and 1 others render only 3 pixels tall (8 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 - 8Size 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="menu_selected">Home</a> is close to 1 other tap targets.The tap target
<a href="course.php" class="menu">Course</a> and 10 others are close to other tap targets.nand2tetris.org HTML validation
Errors
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Line: 2 Column: 1 - 58
"...<!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..."
Bad value “100px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Line: 13 Column: 1 - 66
"..."topbar"> <img class='banner' src='banner.png' height='100px' alt='Banner'/> <span..."
"..."topbar"> <img class='banner' src='banner.png' height='100px' alt='Banner'/> <span..."
No space between attributes.
Line: 19 Column: - 568
"...target='_blank'" class="menu">..." Line: 19 Column: - 681
"...target='_blank'" class="menu">..."
"...target='_blank'" class="menu">..." Line: 19 Column: - 681
"...target='_blank'" class="menu">..."
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Line: 19 Column: - 568
"...target='_blank'" class="menu">..." Line: 19 Column: - 681
"...target='_blank'" class="menu">..."
"...target='_blank'" class="menu">..." Line: 19 Column: - 681
"...target='_blank'" class="menu">..."
Attribute “"” not allowed on element “a” at this point.
Line: 19 Column: 443 - 582
"...">Team</A><A href="https://docs.google.com/forms/d/e/1FAIpQLSeGtR3QyvmjMubq3ij3h7CBKvDSxd9nnHhkLVZR4YB5FVo8sA/viewform" target='_blank'" class="menu">Stay i..." Line: 19 Column: 600 - 695
"... Touch</A><A href="http://questions-and-answers-forum.32033.n3.nabble.com/" target='_blank'" class="menu">Q&A</A..."
"...">Team</A><A href="https://docs.google.com/forms/d/e/1FAIpQLSeGtR3QyvmjMubq3ij3h7CBKvDSxd9nnHhkLVZR4YB5FVo8sA/viewform" target='_blank'" class="menu">Stay i..." Line: 19 Column: 600 - 695
"... Touch</A><A href="http://questions-and-answers-forum.32033.n3.nabble.com/" target='_blank'" class="menu">Q&A</A..."
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Line: 40 Column: 1 - 112
"...p> <div> <iframe width="420" height="315" src="http://www.youtube.com/embed/JtXvUoPx4Qs" frameborder="0" allowfullscreen></ifra..."
"...p> <div> <iframe width="420" height="315" src="http://www.youtube.com/embed/JtXvUoPx4Qs" frameborder="0" allowfullscreen></ifra..."
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Line: 47 Column: 8 - 48
"...h <img src="style/compatible_firefox.gif"/> ..." Line: 48 Column: 8 - 47
".../> <img src="style/compatible_chrome.gif"/><br/> ..."
"...h <img src="style/compatible_firefox.gif"/> ..." Line: 48 Column: 8 - 47
".../> <img src="style/compatible_chrome.gif"/><br/> ..."
Warnings
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
Line: 11 Column: 5 - 18
"... <a name="top"></a> ..."
"... <a name="top"></a> ..."
Attribute “"” is not serializable as XML 1.0.
Line: 19 Column: 443 - 582
"...">Team</A><A href="https://docs.google.com/forms/d/e/1FAIpQLSeGtR3QyvmjMubq3ij3h7CBKvDSxd9nnHhkLVZR4YB5FVo8sA/viewform" target='_blank'" class="menu">Stay i..." Line: 19 Column: 600 - 695
"... Touch</A><A href="http://questions-and-answers-forum.32033.n3.nabble.com/" target='_blank'" class="menu">Q&A</A..."
"...">Team</A><A href="https://docs.google.com/forms/d/e/1FAIpQLSeGtR3QyvmjMubq3ij3h7CBKvDSxd9nnHhkLVZR4YB5FVo8sA/viewform" target='_blank'" class="menu">Stay i..." Line: 19 Column: 600 - 695
"... Touch</A><A href="http://questions-and-answers-forum.32033.n3.nabble.com/" target='_blank'" class="menu">Q&A</A..."
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nand2tetris.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.
nand2tetris.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.