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RADIOTEKA.CZ Radiotéka — Knihy, Audioknihy, CD, DVD, notové záznamy

radioteka.cz Website Information

Daily Unique Visits: 879

Daily Page Views: 1,758

Income Per Day: $5

Estimated Value: $1,200

radioteka.cz is registered under .CZ top-level domain. Please check other sites in .CZ zone.

No name server records were found.

and is probably hosted by Casablanca INT. See the full list of other websites hosted by Casablanca INT.

The highest website radioteka.cz position in Alexa rank database was 63491 and the lowest rank position was 999607. Current position of radioteka.cz in Alexa rank database is 815570.

Desktop speed score of radioteka.cz (42/100) is better than the results of 16.45% of other sites and shows that the page desktop performance can be improved.

Mobile usability score of radioteka.cz (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 radioteka.cz (32/100) is better than the results of 11.35% of other sites and shows that the landing page performance on mobile devices is poor and can be improved.

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radioteka.cz 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.

radioteka.cz 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.

% (c) 2006-2021 CZ.NIC, z.s.p.o.
%
% Intended use of supplied data and information
%
% Data contained in the domain name register, as well as information
% supplied through public information services of CZ.NIC association,
% are appointed only for purposes connected with Internet network
% administration and operation, or for the purpose of legal or other
% similar proceedings, in process as regards a matter connected
% particularly with holding and using a concrete domain name.
%
% Full text available at:
% http://www.nic.cz/page/306/intended-use-of-supplied-data-and-information/
%
% See also a search service at http://www.nic.cz/whois/
%
%
% Whoisd Server Version: 3.12.2
% Timestamp: Sat Dec 11 22:03:45 2021

domain: radioteka.cz
registrant: SB:FORPSI-KBY-S225167
admin-c: JT12-RIPE
nsset: NSS-ROZHLAS
registrar: REG-INTERNET-CZ
registered: 12.09.2013 15:41:12
changed: 10.06.2021 16:12:51
expire: 12.09.2022

contact: SB:FORPSI-KBY-S225167
org: Český rozhlas
name: Klára Koblížková
address: Vinohradská 12
address: Praha 2
address: 12099
address: CZ
registrar: REG-INTERNET-CZ
created: 14.05.2007 16:05:00
changed: 15.05.2018 21:32:00

contact: JT12-RIPE
name: Jiri Trunecek
address: Na Petynce 30
address: Praha 6
address: 169 00
address: CZ
registrar: REG-INTERNET-CZ
created: 10.08.2001 22:13:00
changed: 15.05.2018 21:32:00

nsset: NSS-ROZHLAS
nserver: ns1.cro.cz (195.113.180.18)
nserver: ns2.cro.cz (195.113.180.19)
nserver: nsa.ces.net
tech-c: JT12-RIPE
registrar: REG-INTERNET-CZ
created: 08.11.2018 09:26:27

radioteka.cz server information

Servers Location

radioteka.cz desktop page speed rank

Last tested: 2019-08-18

Desktop Speed Bad
42/100

radioteka.cz Desktop Speed Test Quick Summary


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https://www.radioteka.cz/resize/stretch,img,120,12…21/323/SS021323-CZ.jpg (5 days)
https://www.radioteka.cz/resize/stretch,img,120,12…21/340/SS021340-CZ.jpg (5 days)
https://www.radioteka.cz/resize/stretch,img,120,12…21/485/SS021485-CZ.jpg (5 days)
https://www.radioteka.cz/resize/stretch,img,120,12…21/496/SS021496-CZ.jpg (5 days)
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https://www.radioteka.cz/resize/stretch,img,120,12…21/678/SS021678-CZ.jpg (5 days)
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priority - 13Reduce server response time

In our test, your server responded in 1.5 seconds.

priority - 10Eliminate render-blocking JavaScript and CSS in above-the-fold content

Your page has 12 blocking script resources and 12 blocking CSS resources. This causes a delay in rendering your page.

Remove render-blocking JavaScript:

https://www.radioteka.cz/js/jquery-1.10.1.min.js
https://www.radioteka.cz/js/jquery.jplayer.min.js
https://www.radioteka.cz/js/js.js?v=4
https://www.radioteka.cz/js/dw_scroll_c.js
https://www.radioteka.cz/js/jquery.blockUI.js
https://www.radioteka.cz/js/jquery.fancybox.pack.js
https://www.radioteka.cz/js/owl.carousel.min.js
https://www.radioteka.cz/js/teasers.js?v=4
https://www.radioteka.cz/js/bootstrap.min.js
https://c.imedia.cz/js/retargeting.js
https://www.radioteka.cz/js/prettify-jPlayer.js
https://www.radioteka.cz/js/hints.js

Optimize CSS Delivery of the following:

https://www.radioteka.cz/css/bootstrap.css?v=4
https://www.radioteka.cz/css/jquery.fancybox.css
https://www.radioteka.cz/css/teasers.css?v=4
https://www.radioteka.cz/css/scrollbar_h.css
https://www.radioteka.cz/css/nav.css?v=4
https://www.radioteka.cz/css/cro_footer.css?v=4
https://www.radioteka.cz/css/css.css?v=4
https://www.radioteka.cz/css/main.css?v=4
https://www.radioteka.cz/css/design.css?v=4
https://www.radioteka.cz/css/responsive.css?v=4
https://www.radioteka.cz/css/owl.carousel.min.css?v=4
https://www.radioteka.cz/css/hpslider_new.css?v=4

priority - 2Prioritize visible content

Your page requires additional network round trips to render the above-the-fold content. For best performance, reduce the amount of HTML needed to render above-the-fold content.

The entire HTML response was not sufficient to render the above-the-fold content. This usually indicates that additional resources, loaded after HTML parsing, were required to render above-the-fold content. Prioritize visible content that is needed for rendering above-the-fold by including it directly in the HTML response.

Only about 48% of the final above-the-fold content could be rendered with the full HTML response.
Click to see the screenshot with only the HTML response:

priority - 1Minify 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 6.5KiB (33% reduction).

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priority - 0Minify CSS

Compacting CSS code can save many bytes of data and speed up download and parse times.

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priority - 0Minify HTML

Compacting HTML code, including any inline JavaScript and CSS contained in it, can save many bytes of data and speed up download and parse times.

Minify HTML for the following resources to reduce their size by 1.8KiB (12% reduction).

Minifying https://www.radioteka.cz/ could save 1.8KiB (12% reduction) after compression.

radioteka.cz Desktop Resource Breakdown

Total Resources148
Number of Hosts17
Static Resources123
JavaScript Resources22
CSS Resources13

radioteka.cz mobile page speed rank

Last tested: 2019-08-23

Mobile Speed Bad
32/100

radioteka.cz Mobile Speed Test Quick Summary


priority - 107Optimize images

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priority - 42Leverage 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://content-core.grandit.cz/teasers_radioteka%…n_2019_Sestava%201.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…2F830x200_Hlinka-1.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…slevy_2019_830x200.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…uromedia-2_830x200.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…20nola_830x200_new.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…glar_830x200_new_2.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka%…F830x200_Derfler-1.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka/…ioteka_230x100_new.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka/…/230x100px_nebojte.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka/…0x100px_audiostory.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka/…uromedia-2_830x200.jpg (expiration not specified)
https://content-core.grandit.cz/teasers_radioteka/…i_2019_Sestava%201.jpg (expiration not specified)
https://www.radioteka.cz/css/jquery.fancybox.css (expiration not specified)
https://www.radioteka.cz/css/scrollbar_h.css (expiration not specified)
https://www.radioteka.cz/img/ccc.png (expiration not specified)
https://www.radioteka.cz/img/icons/icon_fb.png (expiration not specified)
https://www.radioteka.cz/img/icons/icon_youtube.png (expiration not specified)
https://www.radioteka.cz/img/logo/logo_gopay.png (expiration not specified)
https://www.radioteka.cz/img/logo/logo_mastercard.png (expiration not specified)
https://www.radioteka.cz/img/logo/logo_radioservis.png (expiration not specified)
https://www.radioteka.cz/img/logo/logo_radioteka.png (expiration not specified)
https://www.radioteka.cz/img/logo/logo_visa.png (expiration not specified)
https://www.radioteka.cz/img/radio_akce/ribbon_action.png (expiration not specified)
https://www.radioteka.cz/img/radio_akce/ribbon_new.png (expiration not specified)
https://www.radioteka.cz/img/radio_akce/ribbon_pripravujeme.png (expiration not specified)
https://www.radioteka.cz/img/resp-basket.png (expiration not specified)
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https://www.radioteka.cz/img/resp-menu.png (expiration not specified)
https://www.radioteka.cz/img/resp-search.png (expiration not specified)
https://www.radioteka.cz/img/tyro.jpg (expiration not specified)
https://www.radioteka.cz/js/bootstrap.min.js (expiration not specified)
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https://www.radioteka.cz/js/jquery-1.10.1.min.js (expiration not specified)
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https://www.radioteka.cz/js/jquery.fancybox.pack.js (expiration not specified)
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priority - 24Reduce server response time

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priority - 8Prioritize visible content

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radioteka.cz Mobile Resource Breakdown

Total Resources130
Number of Hosts15
Static Resources105
JavaScript Resources22
CSS Resources13

radioteka.cz mobile page usability

Last tested: 2019-08-23

Mobile Usability Good
99/100

radioteka.cz Mobile Usability Test Quick Summary


priority - 0Size tap targets appropriately

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radioteka.cz HTML validation

Errors

Bad value “/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/188092/Šimáček Zločin na Zlenicích hradě.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 467 Column: 4 - 145
"...box2'> <img id="img_807288210" alt='Radovan Šimáček: Zločin na Zlenicích hradě ' src='/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/188092/Šimáček Zločin na Zlenicích hradě.jpg ' data-info='[&quot;cdmp3&quot;,&quot;mp3&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/184756/Lustig Arnošt Nemilovaná.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 567 Column: 4 - 145
"...box2'> <img id="img_1942457934" alt='Arnošt Lustig: Nemilovaná' src='/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/184756/Lustig Arnošt Nemilovaná.jpg ' data-info='[&quot;cdmp3&quot;,&quot;mp3&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “http://content-core.grandit.cz/teasers_radioteka/data/47034/230x100px_Leto v dobre.jpg” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 853 Column: 7 - 113
"...m"> <img src="http://content-core.grandit.cz/teasers_radioteka/data/47034/230x100px_Leto v dobre.jpg" alt="" /> ..."

Bad value “Mluvené slovo/Audioknihy” for attribute “id” on element “a”: An ID must not contain whitespace.

Line: 901 Column: 1 - 33
"... <a id="Mluvené slovo/Audioknihy"></a> <..."

Bad value “/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/169595/vitez_1500x1500_Sestava 1-2.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 969 Column: 4 - 145
"...box2'> <img id="img_1277913370" alt='John Wyndham: Den trifidů' src='/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/169595/vitez_1500x1500_Sestava 1-2.jpg ' data-info='[&quot;cdmp3&quot;,&quot;mp3&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

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

Line: 995 Column: 20 - 109
"... <img style="position:absolute; right:0 ;top: 0;" src="/img/radio_akce/ribbon_action.png"/> ..." Line: 1116 Column: 20 - 106
"... <img style="position:absolute; right:0 ;top: 0;" src="/img/radio_akce/ribbon_new.png"/> ..." Line: 1142 Column: 20 - 106
"... <img style="position:absolute; right:0 ;top: 0;" src="/img/radio_akce/ribbon_new.png"/> ..." Line: 1167 Column: 20 - 106
"... <img style="position:absolute; right:0 ;top: 0;" src="/img/radio_akce/ribbon_new.png"/> ..." Line: 1192 Column: 20 - 106
"... <img style="position:absolute; right:0 ;top: 0;" src="/img/radio_akce/ribbon_new.png"/> ..."

Bad value “/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/183794/T. G. Masaryk na rozhlasových vlnách.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1020 Column: 4 - 142
"...box2'> <img id="img_449104464" alt='T. G. Masaryk na rozhlasových vlnách' src='/resize/stretch,img,120,120;http://content-core.grandit.cz/content/admin_content/183794/T. G. Masaryk na rozhlasových vlnách.jpg ' data-info='[&quot;cd&quot;,&quot;mp3&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/184224/Budovy,které mluví_Obal.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1332 Column: 4 - 128
"...box2'> <img id="img_1554210829" alt='BUDOVY, KTERÉ MLUVÍ' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/184224/Budovy,které mluví_Obal.jpg ' data-info='[&quot;book&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/183587/PRIBEHY Z MEXIKA.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1380 Column: 4 - 128
"...box2'> <img id="img_1763039326" alt='Pavla Jazairiová: Příběhy z Mexika' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/183587/PRIBEHY Z MEXIKA.jpg ' data-info='[&quot;book&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/180239/V hlavni roli_rozhlas.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1404 Column: 4 - 128
"...box2'> <img id="img_125515691" alt='Milan Pokorný: V hlavní roli rozhlas!' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/180239/V hlavni roli_rozhlas.jpg ' data-info='[&quot;book&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188540/R 413 Svoboda Filmové melodie.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1496 Column: 4 - 128
"...box2'> <img id="img_995284617" alt='Karel Svoboda (arr. M. Hybler): Nejznámější filmové melodie' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188540/R 413 Svoboda Filmové melodie.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188383/R 408 Novák Strepitus.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1520 Column: 4 - 128
"...box2'> <img id="img_501346679" alt='Jan Novák: Strepitus festivi pro čtyři lesní rohy' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188383/R 408 Novák Strepitus.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188382/R 401 Novák Scherzi pastorali.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1544 Column: 4 - 128
"...box2'> <img id="img_2030684954" alt='Jan Novák: Scherzi pastorali pro klarinet (nebo basklarinet) a klavír' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188382/R 401 Novák Scherzi pastorali.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188350/R 402 Kaprálová Suite.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1568 Column: 4 - 128
"...box2'> <img id="img_1114365881" alt='Vítězslava Kaprálová: Suite en miniature, op. 1' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188350/R 402 Kaprálová Suite.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188094/R 405 Domažlický České písně.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1592 Column: 4 - 128
"...box2'> <img id="img_340144540" alt='František Domažlický: České písně pro tři ženské hlasy (nebo dětský/ženský sbor) a smyčcové kvarteto, op. 17 ' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188094/R 405 Domažlický České písně.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188093/R 391 Skoumal Únos Šeherezády.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1616 Column: 4 - 128
"...box2'> <img id="img_1643571163" alt='Adam Skoumal: Únos Šeherezády pro flétnu a klavír' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/188093/R 391 Skoumal Únos Šeherezády.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

Bad value “/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/184379/R 399 Petrovy kameny.jpg ” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.

Line: 1640 Column: 4 - 128
"...box2'> <img id="img_1351603409" alt='Jan Vičar: Koncert pro fagot a orchestr „Petrovy kameny&quot;' src='/resize/fit,img,120,;http://content-core.grandit.cz/content/admin_content/184379/R 399 Petrovy kameny.jpg ' data-info='[&quot;noty&quot;]' style="width:100%;position:relative; top:0; left:0" onerror="this.src='/img/default.jpg'"/> ..."

No “p” element in scope but a “p” end tag seen.

Line: 1672 Column: 54 - 57
"...srpna.</p></p> ..."

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

Line: 1913 Column: 4 - 7
"...></dd> <dl> <..." Line: 1963 Column: 4 - 7
"...></dd> <dl> <..."

Element “dl” is missing a required instance of child element “dd”.

Line: 1984 Column: 3 - 7
"...a></dt> </dl> <di..."

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radioteka.cz 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.

radioteka.cz 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.