o2.cz website information.
o2.cz domain name is registered by .CZ top-level domain registry. See the other sites registred in .CZ domain zone.
Following name servers are specified for o2.cz domain:
- dns.iol.cz
- ns2.tel.cz
and probably website o2.cz is hosted by AMAZON-AES - Amazon.com, Inc., US web hosting company. Check the complete list of other most popular websites hosted by AMAZON-AES - Amazon.com, Inc., US hosting company.
According to Alexa traffic rank the highest website o2.cz position was 30947 (in the world). The lowest Alexa rank position was 48982. Now website o2.cz ranked in Alexa database as number 34361 (in the world).
Website o2.cz Desktop speed measurement score (48/100) is better than the results of 21.82% of other sites shows that the page desktop performance can be improved.
o2.cz 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 o2.cz (51/100) is better than the results of 35.73% 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 |
|---|---|---|
| Sep-20-2024 | 34,361 | -37 |
| Sep-19-2024 | 34,324 | 162 |
| Sep-18-2024 | 34,486 | -285 |
| Sep-17-2024 | 34,201 | 198 |
| Sep-16-2024 | 34,399 | 168 |
| Sep-15-2024 | 34,567 | -202 |
| Sep-14-2024 | 34,365 | -10 |
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o2.cz 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.
o2.cz whois
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o2.cz server information
o2.cz desktop page speed rank
Last tested: 2017-05-31
Desktop Speed
Bad
48/100
o2.cz Desktop Speed Test Quick Summary
priority - 100 Optimize images
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priority - 12 Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 3 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.
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priority - 5 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.
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https://connect.facebook.net/en_US/fbevents.js (20 minutes)
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https://www.google-analytics.com/analytics.js (2 hours)
priority - 3 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://o2.cz/
https://www.o2.cz/
https://www.o2.cz/osobni/
https://www.o2.cz/
https://www.o2.cz/osobni/
priority - 0 Enable compression
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priority - 0 Minify CSS
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priority - 0 Minify JavaScript
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o2.cz Desktop Resources
| Total Resources | 172 |
| Number of Hosts | 33 |
| Static Resources | 63 |
| JavaScript Resources | 34 |
| CSS Resources | 9 |
o2.cz Desktop Resource Breakdown
o2.cz mobile page speed rank
Last tested: 2017-05-31
Mobile Speed
Bad
51/100
o2.cz Mobile Speed Test Quick Summary
priority - 48 Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 3 blocking script resources and 5 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.
Remove render-blocking JavaScript:
https://www.o2.cz/ga-set/persoo.js
https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492
https://dev.visualwebsiteoptimizer.com/deploy/js_v…om=0.24873096914961934
https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492
https://dev.visualwebsiteoptimizer.com/deploy/js_v…om=0.24873096914961934
Optimize CSS Delivery of the following:
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https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492
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priority - 40 Optimize images
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Compressing and resizing https://www.o2.cz/nexternal/hp_data/129.png could save 21.6KiB (94% reduction).
Compressing and resizing https://www.o2.cz/nexternal/hp_data/123.png could save 17.2KiB (95% reduction).
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priority - 10 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://o2.cz/
https://www.o2.cz/
https://www.o2.cz/osobni/
https://www.o2.cz/
https://www.o2.cz/osobni/
priority - 8 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://api2.vivtracking.com/PageView (expiration not specified)
https://images.boldchat.com/images/clear.gif (expiration not specified)
https://o2.vivtracking.com/vivtracking.min.js (expiration not specified)
https://www.o2.cz/file_conver/540190/_496x160_HPmalepromo_slza.jpg (expiration not specified)
https://persoo-o2-310448.c.cdn77.org/g26dpqsd9ulpv37rhnobiu23/p/actions.js (5 minutes)
https://persoo-o2-310448.c.cdn77.org/g26dpqsd9ulpv37rhnobiu23/p/persoo.js (5 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-57QJMR (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/1412776058987377?v=2.7.12 (20 minutes)
https://script.crazyegg.com/pages/scripts/0011/3229.js?415630 (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
https://images.boldchat.com/images/clear.gif (expiration not specified)
https://o2.vivtracking.com/vivtracking.min.js (expiration not specified)
https://www.o2.cz/file_conver/540190/_496x160_HPmalepromo_slza.jpg (expiration not specified)
https://persoo-o2-310448.c.cdn77.org/g26dpqsd9ulpv37rhnobiu23/p/actions.js (5 minutes)
https://persoo-o2-310448.c.cdn77.org/g26dpqsd9ulpv37rhnobiu23/p/persoo.js (5 minutes)
https://www.googletagmanager.com/gtm.js?id=GTM-57QJMR (15 minutes)
https://connect.facebook.net/en_US/fbevents.js (20 minutes)
https://connect.facebook.net/signals/config/1412776058987377?v=2.7.12 (20 minutes)
https://script.crazyegg.com/pages/scripts/0011/3229.js?415630 (60 minutes)
https://www.google-analytics.com/analytics.js (2 hours)
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 3.5KiB (59% reduction).
Compressing https://o2.vivtracking.com/vivtracking.min.js could save 2.8KiB (64% reduction).
Compressing https://api2.vivtracking.com/sc.html?o=https://www.o2.cz could save 669B (46% reduction).
Compressing https://api2.vivtracking.com/sc.html?o=https://www.o2.cz could save 669B (46% reduction).
priority - 0 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 2.3KiB (11% reduction).
Minifying https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492 could save 1.6KiB (11% reduction) after compression.
Minifying https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492 could save 730B (11% reduction) after compression.
Minifying https://www.o2.cz/_stat/181526-1-PUBLIC/resources/…s?_linkv=1496267447492 could save 730B (11% reduction) after compression.
priority - 0 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 836B (18% reduction).
Minifying https://persoo-o2-310448.c.cdn77.org/g26dpqsd9ulpv37rhnobiu23/p/actions.js could save 836B (18% reduction) after compression.
o2.cz Mobile Resources
| Total Resources | 174 |
| Number of Hosts | 34 |
| Static Resources | 63 |
| JavaScript Resources | 35 |
| CSS Resources | 9 |
o2.cz Mobile Resource Breakdown
o2.cz mobile page usability
Last tested: 2017-05-31
Mobile Usability
Good
99/100
o2.cz Mobile Usability Test Quick Summary
priority - 1 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
The tap target
<button type="button" class="slick-prev sli…slick-disabled">Previous</button> and 4 others are close to other tap targets.The tap target
<button type="button" class="slick-next slick-arrow">Next</button> and 4 others are close to other tap targets.o2.cz similar domains
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o2.cz 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.
o2.cz 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.