duke.edu Website Information
Daily Unique Visits: 2,765,637
Daily Page Views: 22,125,096
Income Per Day: $22,125
Estimated Value: $23,895,000
This website is located in United States and is using following IP address 152.3.72.197. See the complete list of popular websites hosted in United States.
duke.edu is registered under .EDU top-level domain. Please check other sites in .EDU zone.
Website duke.edu is using the following name servers:
- dns-auth-01.oit.duke.edu
- dns-nc1-01.oit.duke.edu
- dns-auth-02.oit.duke.edu
and is probably hosted by DUKE-INTERCHANGE - Duke University, US. See the full list of other websites hosted by DUKE-INTERCHANGE - Duke University, US.
The highest website duke.edu position in Alexa rank database was 539 and the lowest rank position was 557. Current position of duke.edu in Alexa rank database is 551.
Desktop speed score of duke.edu (46/100) is better than the results of 19.93% of other sites and shows that the page desktop performance can be improved.
Mobile usability score of duke.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 duke.edu (61/100) is better than the results of 57.04% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
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duke.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.
duke.edu whois
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Domain Name: DUKE.EDU
Registrant:
Duke University
905 W. Main Street, Suite 18B
Suite 2106
Durham, NC 27701
US
Administrative Contact:
Domain Administrator
Duke University
334 Blackwell St.
Suite 2106
Durham, NC 27701
US
+1.9196845300
datacom-hostmaster@duke.edu
Technical Contact:
Domain Administrator
Duke University
334 Blackwell St.
Suite 2106
Durham, NC 27701
US
+1.9196842200
datacom-hostmaster@duke.edu
Name Servers:
DNS-AUTH-01.OIT.DUKE.EDU
DNS-NC1-01.OIT.DUKE.EDU
DNS-AUTH-02.OIT.DUKE.EDU
Domain record activated: 02-Jun-1986
Domain record last updated: 25-Mar-2021
Domain expires: 31-Jul-2021
duke.edu server information
Servers Location
duke.edu desktop page speed rank
Last tested: 2019-12-02
duke.edu Desktop Speed Test Quick Summary
priority - 119Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 1.1MiB (80% reduction).
Compressing and resizing https://scontent-lga3-1.cdninstagram.com/v/t51.288…3e65b05a5e&oe=5E7F418E could save 268.3KiB (92% reduction).
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Compressing and resizing https://scontent-lga3-1.cdninstagram.com/v/t51.288…63c9c659ff&oe=5E86A437 could save 127.4KiB (87% reduction).
priority - 8Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 1 blocking script resources and 1 blocking CSS resources. This causes a delay in rendering your page.
Remove render-blocking JavaScript:
Optimize CSS Delivery of the following:
priority - 3Leverage 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://i1.ytimg.com/vi/-25aiwPAmAs/sddefault.jpg (2 hours)
https://i1.ytimg.com/vi/7J_BzepWnWc/mqdefault.jpg (2 hours)
https://i1.ytimg.com/vi/MY77DcWVDqE/mqdefault.jpg (2 hours)
https://i1.ytimg.com/vi/mILhaaEX0Ww/mqdefault.jpg (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)
duke.edu Desktop Resource Breakdown
| Total Resources | 40 |
| Number of Hosts | 6 |
| Static Resources | 36 |
| JavaScript Resources | 4 |
| CSS Resources | 3 |
duke.edu mobile page speed rank
Last tested: 2017-05-24
duke.edu Mobile Speed Test Quick Summary
priority - 65Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 632.7KiB (85% reduction).
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:
https://i1.ytimg.com/vi/1Kzl-j-utz0/mqdefault.jpg (2 hours)
https://i1.ytimg.com/vi/5A6m46AaS68/mqdefault.jpg (2 hours)
https://i1.ytimg.com/vi/9eQs6yC-OLk/sddefault.jpg (2 hours)
https://i1.ytimg.com/vi/mkPH1DbBU4g/mqdefault.jpg (2 hours)
https://www.google-analytics.com/analytics.js (2 hours)
duke.edu Mobile Resource Breakdown
| Total Resources | 26 |
| Number of Hosts | 5 |
| Static Resources | 21 |
| JavaScript Resources | 3 |
| CSS Resources | 2 |
duke.edu mobile page usability
Last tested: 2017-05-24
duke.edu 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.
<a href="http://admissions.duke.edu">Admissions</a> and 2 others are close to other tap targets.<a href="http://dukehealth.org/">Duke Health</a> and 8 others are close to other tap targets.The tap target
<a href="https://twitter.com/DukeU">@DukeU</a> and 2 others are close to other tap targets.duke.edu HTML validation
Errors
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
"... <link rel="apple-touch-icon-precomposed" href="/assets/img/apple-touch-icon-precomposed-144x144.png" sizes="144x144"/> <..." Line: 32 Column: 5 - 118
"...44"/> <link rel="apple-touch-icon-precomposed" href="/assets/img/apple-touch-icon-precomposed-72x72.png" sizes="72x72"/> <..." Line: 34 Column: 5 - 27
"...72"/> <link rel="apple-touch-icon-precomposed" href="/assets/img/apple-touch-icon-precomposed-114x114.png" sizes="114x114"/> <..."
Bad value “navigation” for attribute “role” on element “ul”.
"...d-nav"> <ul role="navigation" class="subhead-nav inline-list"> <l..."
No space between attributes.
"...ass="nav-large"data-set="aa-pr..."
Start tag “a” seen but an element of the same type was already open.
"...a href=""><a href="https://today.duke.edu/2017/11/duke-scholars-contribute-four-new-exhibits-roman-museum" style="color: white; text-shadow: 1px 1px 2px rgba(0,0,0,0.5), -1px -1px 2px rgba(0,0,0,0.5), 1px -1px 4px rgba(0,0,0,0.5), -1px 1px 4px rgba(0,0,0,0.5); " target="_blank" title="Duke Scholars Contribute Four New Exhibits to Roman Museum -- Duke Today">A team..."
Stray end tag “a”.
"...lpia »</a></a></p> ..." Line: 574 Column: 7 - 10
"...iv> </a> ..." Line: 615 Column: 7 - 10
"...iv> </a> ..."
Element “span” not allowed as child of element “time” in this context. (Suppressing further errors from this subtree.)
"...ndar">Dec <span class="day">01</sp..." Line: 665 Column: 49 - 66
"...ndar">Dec <span class="day">01</sp..." Line: 674 Column: 49 - 66
"...ndar">Dec <span class="day">01</sp..."
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
"...>01</span></time> ..." Line: 665 Column: 76 - 82
"...>01</span></time> ..." Line: 674 Column: 76 - 82
"...>01</span></time> ..."
Element “img” is missing required attribute “src”.
"..."> <img sizes="(min-width: 46.8em) calc(59vw - 6em), (min-width: 75em) calc(75em*.59), 100vw" srcset="https://i1.ytimg.com/vi/4Tl6cxcWmKo/mqdefault.jpg 320w, https://i1.ytimg.com/vi/4Tl6cxcWmKo/sddefault.jpg 640w" alt="This is Duke video"/> ..."
Warnings
The “navigation” role is unnecessary for element “nav”.
"...y-nav"> <nav id="nav" role="navigation" class="nav-primary"> <u..."
The “banner” role is unnecessary for element “header”.
"... </div> <header role="banner" class="header fixedsticky"> <di..."
The “contentinfo” role is unnecessary for element “footer”.
"... </div> <footer class="footer" role="contentinfo"> <di..."
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duke.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.
duke.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.