caltech.edu website information.
caltech.edu domain name is registered by .EDU top-level domain registry. See the other sites registred in .EDU domain zone.
Following name servers are specified for caltech.edu domain:
- ns0090.secondary.cloudflare.com
- ns0239.secondary.cloudflare.com
and probably website caltech.edu is hosted by WIKIMEDIA - Wikimedia Foundation Inc., US web hosting company. Check the complete list of other most popular websites hosted by WIKIMEDIA - Wikimedia Foundation Inc., US hosting company.
According to Alexa traffic rank the highest website caltech.edu position was 880 (in the world). The lowest Alexa rank position was 941. Now website caltech.edu ranked in Alexa database as number 902 (in the world).
Website caltech.edu Desktop speed measurement score (58/100) is better than the results of 33.06% of other sites shows that the page desktop performance can be improved.
caltech.edu Mobile usability score (99/100) is better than the results of 79.46% of other sites and means that the page is mobile-friendly.
Mobile speed measurement score of caltech.edu (58/100) is better than the results of 50.23% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.
Weekly Rank Report
| Date | Rank | Change |
|---|---|---|
| Nov-15-2024 | 902 | -9 |
| Nov-14-2024 | 893 | -7 |
| Nov-13-2024 | 886 | 0 |
| Nov-12-2024 | 886 | 0 |
| Nov-11-2024 | 886 | 0 |
| Nov-10-2024 | 886 | -3 |
| Nov-09-2024 | 883 | 9 |
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caltech.edu Rank History
Alexa can identify the popularity of a website as well as its competitors. It is important for website owners and bloggers to know their Alexa ranking because it shows how many visitors have viewed their web page. It gives them a clear idea of how popular their website is on the internet and the ranking of their competitors.
caltech.edu whois
WHOIS is a query and response protocol that is widely used for querying databases that store the registered users or assignees of an Internet resource, such as a domain name, an IP address block, or an autonomous system, but is also used for a wider range of other information.
This Registry database contains ONLY .EDU domains.
The data in the EDUCAUSE Whois database is provided
by EDUCAUSE for information purposes in order to
assist in the process of obtaining information about
or related to .edu domain registration records.
The EDUCAUSE Whois database is authoritative for the
.EDU domain.
A Web interface for the .EDU EDUCAUSE Whois Server is
available at: http://whois.educause.edu
By submitting a Whois query, you agree that this information
will not be used to allow, enable, or otherwise support
the transmission of unsolicited commercial advertising or
solicitations via e-mail. The use of electronic processes to
harvest information from this server is generally prohibited
except as reasonably necessary to register or modify .edu
domain names.
-------------------------------------------------------------
Domain Name: CALTECH.EDU
Registrant:
California Institute of Technology
Information Management Systems and Services MS 1-10
1200 East California Boulevard
Pasadena, CA 91125
USA
Administrative Contact:
Domain Admin
California Institute of Technology
1200 E. California Blvd.
MS 1-10
Pasadena, CA 91125
USA
+1.6263953500
noc@caltech.edu
Technical Contact:
California Institute of Technology
1200 E. California Blvd.
MS 1-10
Pasadena, CA 91125
USA
+1.6263953500
noc@caltech.edu
Name Servers:
NS0239.SECONDARY.CLOUDFLARE.COM
NS0090.SECONDARY.CLOUDFLARE.COM
Domain record activated: 06-Jan-1986
Domain record last updated: 21-Aug-2024
Domain expires: 31-Jul-2027
caltech.edu server information
caltech.edu desktop page speed rank
Last tested: 2016-06-13
Desktop Speed
Bad
58/100
caltech.edu Desktop Speed Test Quick Summary
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priority - 25 Optimize images
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priority - 10 Eliminate render-blocking JavaScript and CSS in above-the-fold content
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priority - 4 Minify 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 35.9KiB (14% reduction).
Minifying http://www.caltech.edu/sites/all/themes/caltech_mt…caltech_mte.css?o8klu7 could save 19.1KiB (12% reduction).
Minifying http://www.caltech.edu/sites/all/themes/caltech_mt…h_mte_print.css?o8klu7 could save 4.3KiB (19% reduction).
Minifying http://www.caltech.edu/sites/all/modules/calendar/…ar_multiday.css?o8klu7 could save 3KiB (16% reduction).
Minifying http://www.caltech.edu/modules/system/system.base.css?o8klu7 could save 2.3KiB (44% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…tech_banner.css?o8klu7 could save 1.6KiB (17% reduction).
Minifying http://www.caltech.edu/modules/system/system.theme.css?o8klu7 could save 1.2KiB (33% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…s/frontpage.css?o8klu7 could save 1.1KiB (14% reduction).
Minifying http://www.caltech.edu/sites/all/modules/date/date_api/date.css?o8klu7 could save 979B (27% reduction).
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Minifying http://www.caltech.edu/sites/all/themes/caltech_mte/css/style.css?o8klu7 could save 529B (12% reduction).
Minifying http://www.caltech.edu/modules/user/user.css?o8klu7 could save 517B (29% reduction).
Minifying http://www.caltech.edu/sites/all/themes/caltech_mt…h_mte_print.css?o8klu7 could save 4.3KiB (19% reduction).
Minifying http://www.caltech.edu/sites/all/modules/calendar/…ar_multiday.css?o8klu7 could save 3KiB (16% reduction).
Minifying http://www.caltech.edu/modules/system/system.base.css?o8klu7 could save 2.3KiB (44% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…tech_banner.css?o8klu7 could save 1.6KiB (17% reduction).
Minifying http://www.caltech.edu/modules/system/system.theme.css?o8klu7 could save 1.2KiB (33% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…s/frontpage.css?o8klu7 could save 1.1KiB (14% reduction).
Minifying http://www.caltech.edu/sites/all/modules/date/date_api/date.css?o8klu7 could save 979B (27% reduction).
Minifying http://www.caltech.edu/sites/all/libraries/colorbo…e2/colorbox.css?o8klu7 could save 758B (24% reduction).
Minifying http://www.caltech.edu/modules/system/system.menus.css?o8klu7 could save 588B (29% reduction).
Minifying http://www.caltech.edu/sites/all/themes/caltech_mte/css/style.css?o8klu7 could save 529B (12% reduction).
Minifying http://www.caltech.edu/modules/user/user.css?o8klu7 could save 517B (29% reduction).
priority - 3 Minify 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 31KiB (56% reduction).
Minifying http://www.caltech.edu/misc/drupal.js?o8klu7 could save 11KiB (67% reduction).
Minifying http://www.caltech.edu/sites/all/themes/caltech_mt…/caltech_mte.js?o8klu7 could save 7.6KiB (49% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…js/frontpage.js?o8klu7 could save 4.8KiB (52% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…ltech_banner.js?o8klu7 could save 3.8KiB (50% reduction).
Minifying http://www.caltech.edu/misc/jquery.once.js?v=1.2 could save 2.5KiB (84% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/caltech/utils.js could save 751B (54% reduction).
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Minifying http://www.caltech.edu/sites/all/themes/caltech_mt…/caltech_mte.js?o8klu7 could save 7.6KiB (49% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…js/frontpage.js?o8klu7 could save 4.8KiB (52% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/ca…ltech_banner.js?o8klu7 could save 3.8KiB (50% reduction).
Minifying http://www.caltech.edu/misc/jquery.once.js?v=1.2 could save 2.5KiB (84% reduction).
Minifying http://www.caltech.edu/sites/all/modules/custom/caltech/utils.js could save 751B (54% reduction).
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priority - 3 Leverage 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://s3-us-west-1.amazonaws.com/www-prod-storage…du/Nobel-Laureates.png (expiration not specified)
http://s3-us-west-1.amazonaws.com/www-prod-storage…/Visiting-Scholars.png (expiration not specified)
https://pbs.twimg.com/profile_images/723820061039824897/uqsJ0mXk_normal.jpg (expiration not specified)
https://s3-us-west-1.amazonaws.com/www-prod-storag….edu/instagram_rev.png (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
http://s3-us-west-1.amazonaws.com/www-prod-storage…/Visiting-Scholars.png (expiration not specified)
https://pbs.twimg.com/profile_images/723820061039824897/uqsJ0mXk_normal.jpg (expiration not specified)
https://s3-us-west-1.amazonaws.com/www-prod-storag….edu/instagram_rev.png (expiration not specified)
https://static.doubleclick.net/instream/ad_status.js (15 minutes)
http://www.google-analytics.com/analytics.js (2 hours)
caltech.edu Desktop Resources
| Total Resources | 96 |
| Number of Hosts | 11 |
| Static Resources | 65 |
| JavaScript Resources | 22 |
| CSS Resources | 23 |
caltech.edu Desktop Resource Breakdown
caltech.edu mobile page speed rank
Last tested: 2019-12-03
Mobile Speed
Bad
58/100
caltech.edu Mobile Speed Test Quick Summary
priority - 26 Avoid 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://caltech.edu/
http://www.caltech.edu/
https://www.caltech.edu/
http://www.caltech.edu/
https://www.caltech.edu/
priority - 23 Leverage 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.caltech.edu/api/v1/did-you-know/random/4 (expiration not specified)
https://www.caltech.edu/api/v1/notifications/16 (expiration not specified)
https://www.caltech.edu/api/v1/notifications/20 (expiration not specified)
https://www.caltech.edu/static/airspace/css/airspace.css (expiration not specified)
https://www.caltech.edu/static/airspace/img/icon-chevron-left.png (expiration not specified)
https://www.caltech.edu/static/airspace/img/icon-chevron-right.png (expiration not specified)
https://www.caltech.edu/static/airspace/js/airspace.js (expiration not specified)
https://www.caltech.edu/static/bootstrap-4.1.0/dist/js/bootstrap.bundle.js (expiration not specified)
https://www.caltech.edu/static/core/img/caltech-new-logo.png (expiration not specified)
https://www.caltech.edu/static/core/js/blocks.js (expiration not specified)
https://www.caltech.edu/static/core/js/news.js (expiration not specified)
https://www.caltech.edu/static/core/js/notifications.js (expiration not specified)
https://www.caltech.edu/static/link_farms/js/link_farms.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/css/bootstrap-4.1.0.css (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/css/theme.css (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/bg-footer.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/flame.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-chevron-grey-550.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-chevron-orange.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-footerpin.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-search.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/menu-burger.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/clamp.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/modernizr-3.5.0-custom.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/theme.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/open-ico…fonts/open-iconic.woff (expiration not specified)
https://www.caltech.edu/static/wagtailfontawesome/…wagtailfontawesome.css (expiration not specified)
https://www.caltech.edu/static/www/js/www.js (expiration not specified)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/216652…1085?v=2.9.14&r=stable (20 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://www.caltech.edu/api/v1/notifications/16 (expiration not specified)
https://www.caltech.edu/api/v1/notifications/20 (expiration not specified)
https://www.caltech.edu/static/airspace/css/airspace.css (expiration not specified)
https://www.caltech.edu/static/airspace/img/icon-chevron-left.png (expiration not specified)
https://www.caltech.edu/static/airspace/img/icon-chevron-right.png (expiration not specified)
https://www.caltech.edu/static/airspace/js/airspace.js (expiration not specified)
https://www.caltech.edu/static/bootstrap-4.1.0/dist/js/bootstrap.bundle.js (expiration not specified)
https://www.caltech.edu/static/core/img/caltech-new-logo.png (expiration not specified)
https://www.caltech.edu/static/core/js/blocks.js (expiration not specified)
https://www.caltech.edu/static/core/js/news.js (expiration not specified)
https://www.caltech.edu/static/core/js/notifications.js (expiration not specified)
https://www.caltech.edu/static/link_farms/js/link_farms.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/css/bootstrap-4.1.0.css (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/css/theme.css (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/bg-footer.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/flame.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-chevron-grey-550.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-chevron-orange.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-footerpin.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/icon-search.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/img/menu-burger.png (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/clamp.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/modernizr-3.5.0-custom.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/js/theme.js (expiration not specified)
https://www.caltech.edu/static/theme-v7.0/open-ico…fonts/open-iconic.woff (expiration not specified)
https://www.caltech.edu/static/wagtailfontawesome/…wagtailfontawesome.css (expiration not specified)
https://www.caltech.edu/static/www/js/www.js (expiration not specified)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/216652…1085?v=2.9.14&r=stable (20 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
priority - 11 Reduce server response time
In our test, your server responded in 0.96 seconds.
There are many factors that can slow down your server response time. Please read our recommendations to learn how you can monitor and measure where your server is spending the most time.
priority - 8 Eliminate 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.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
Optimize CSS Delivery of the following:
https://www.caltech.edu/static/theme-v7.0/css/bootstrap-4.1.0.css
priority - 6 Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 56.4KiB (72% reduction).
Compressing https://web-prod-storage.s3.amazonaws.com/main.osc…M2S&Expires=1575340302 could save 56.4KiB (72% reduction).
priority - 3 Minify 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 26.7KiB (46% reduction).
Minifying https://www.caltech.edu/static/bootstrap-4.1.0/dist/js/bootstrap.bundle.js could save 17.5KiB (42% reduction) after compression.
Minifying https://www.caltech.edu/static/airspace/js/airspace.js could save 4.4KiB (57% reduction) after compression.
Minifying https://www.caltech.edu/static/theme-v7.0/js/clamp.js could save 1.4KiB (51% reduction) after compression.
Minifying https://www.caltech.edu/static/theme-v7.0/js/theme.js could save 1KiB (58% reduction) after compression.
Minifying https://www.caltech.edu/static/core/js/news.js could save 798B (43% reduction) after compression.
Minifying https://www.caltech.edu/static/core/js/blocks.js could save 774B (42% reduction) after compression.
Minifying https://www.caltech.edu/static/www/js/www.js could save 435B (50% reduction) after compression.
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Minifying https://www.caltech.edu/static/core/js/news.js could save 798B (43% reduction) after compression.
Minifying https://www.caltech.edu/static/core/js/blocks.js could save 774B (42% reduction) after compression.
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priority - 0 Enable 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 3.6KiB (72% reduction).
Compressing https://www.caltech.edu/api/v1/did-you-know/random/4 could save 3.6KiB (72% reduction).
caltech.edu Mobile Resources
| Total Resources | 142 |
| Number of Hosts | 9 |
| Static Resources | 39 |
| JavaScript Resources | 20 |
| CSS Resources | 4 |
caltech.edu Mobile Resource Breakdown
caltech.edu mobile page usability
Last tested: 2019-12-03
Mobile Usability
Good
99/100
caltech.edu Mobile Usability Test Quick Summary
priority - 0 Size 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="/research/jpl" class="did-you-know-b…ontent-between">JPL is current…craft missions</a> is close to 2 other tap targets.The tap target
<a href="#10aa0de0-818d…d-d2c32744fbee" class="left carousel-…-control--prev"></a> and 1 others are close to other tap targets.The tap target
<a href="#20d85a6f-782d…5-63f951fd9f0b" class="grid-carousel_…l-control-prev"></a> and 1 others are close to other tap targets.The tap target
<a href="https://www.ed…chool/caltechx" class="mx-auto my-auto">edX…edX</a> is close to 1 other tap targets.The tap target
<a href="https://twitte…23WorldAIDSDay">#WorldAIDSDay</a> and 2 others are close to other tap targets.The tap target
<a href="/contact" class="footer__menu__link">Contact Us</a> and 1 others are close to other tap targets.The tap target
<a href="/contact" class="footer__menu__link">Contact Us</a> and 1 others are close to other tap targets.caltech.edu similar domains
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caltech.edu Ping
Ping is a networking utility tool to test if a particular host is reachable. It is a diagnostic that checks reachability of a host on an Internet Protocol (IP) network. In a computer network, a ping test is a way of sending messages from one host to another. Aside from checking if the host is connected to a network, ping also gives indicators of the reliability and general speed of the connection.
caltech.edu TRACEROUTE
Traceroute is a network diagnostic tool used to track the pathway taken by a packet on an IP network from source to destination. Traceroute also records the time taken for each hop the packet makes during its route to the destination. Traceroute uses ICMP (Internet Control Message Protocol) echo packets with variable time to live values. The response time of each hop is calculated. To guarantee accuracy, each hop is queried multiple times (usually three times) to better measure the response of that particular hop.