Cdk.cz Nakladatelství Centrum pro studium demokracie a kultury, o.p.s.

Cdk.cz Overview

Cdk.cz belongs to INTERNET CZ, a.s. Check the list of other websites hosted by INTERNET CZ, a.s.

In terms of rank-to-traffic ratio, cdk.cz has 1,576 unique users per day, viewing 3,184 pages. The rank based value of cdk.cz is 2,333 USD. Every user makes 2.16 pageviews on average.

Cdk.cz boasts a link base consisting of 226 referring domains and 289 external backlinks, as revealed by the data obtained from web network scanning.

Cdk.cz top-level domain belongs to .CZ domain zone. Check other webpages in .CZ zone.

According the last verification test in July 22, 2022, cdk.cz has an expired SSL certificate issued by Let's Encrypt (expired on August 28, 2022). Click button “Update” SSL Information at the Safety Information section. Check the list of websites using SSL by Let's Encrypt.

Based on data from Google Safe Browsing, Symantec and Web of Trust cdk.cz is a fairly safe domain.

Based on Mobile-Friendly test by Google cdk.cz is poorly optimized for mobile phones and tablets. Remember that optimizing your website design for mobile devices ensures that all of your web pages perform well on all devices, page loading speed can also be accelerated.

Cdk.cz Website Safety

Overview

Last Updated: 12/27/2024

Unknown status.

We gather website safety and reputation data and compare it with available third-party sources so we calculate own safety and trustworthiness rate based on information that we get.

Norton Connect Safe

Last Updated: 03/16/2024

cdk.cz is safe.

Norton ConnectSafe evaluates cdk.cz for any unsafe and insecure content. The results are critical for families with young children.

Google Safe Search

Last Updated: 12/27/2024

Not yet checked.

SafeSearch is used as a parental control tool to filter out any inappropriate for your children search results on your devices: phones, tablets or personal computers.

Google Safe Browsing

Last Updated: 01/10/2019

cdk.cz is safe.
Malware: not found.
Phishing: not detected.
Unwanted software: not found.
Harmfull applications: not found.

Google Safe Browsing notifies when websites are compromised by malicious actors. These protections work across Google products and provide a safer online experience.

Site Advisor

Last Updated: 04/12/2021

cdk.cz is safe.

McAfee assesses cdk.cz for a meaningful set of security threats. Featured dangers from annoying pop-ups to hidden Trojans, that can steal your identity, will be revealed. McAfee does not analyze cdk.cz for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 01/24/2019

cdk.cz child safety is good.

The WOT calculates reputation of the cdk.cz. This reputation system receives ratings from users and information from third-party sources, assesses the cdk.cz for safety features and confirms, whether cdk.cz is suitable for children.

SSL Information

SSL Checker Tool

Domain	cdk.cz
Issuer Organization	Let's Encrypt
Issuer	R3
Algorithm	RSA-SHA256
Valid form	05/30/2022
Expiration	08/28/2022
Signed	Certificate is not self signed
Additional Domains	cdk.cz old.cdk.cz www.cdk.cz

Cdk.cz Rank History

Alexa Rank shows how popular cdk.cz is in comparison with other sites. The most popular site has Alexa Rank equals 1. If cdk.cz has Alexa Rank equals 100,000, then it is in TOP 100,000 popular sites in the world. The rank is calculated using a combination of average daily visitors to cdk.cz and pageviews on cdk.cz over the past 3 months.

Cdk.cz Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 24806

ASN Title: INTERNET CZ, a.s.

Last Update: 06/27/2024

% This is the RIPE Database query service.
% The objects are in RPSL format.
%
% The RIPE Database is subject to Terms and Conditions.
% See http://www.ripe.net/db/support/db-terms-conditions.pdf

% Note: this output has been filtered.
% To receive output for a database update, use the "-B" flag.

% Information related to 'AS24802 - AS24834'

as-block: AS24802 - AS24834
descr: RIPE NCC ASN block
remarks: These AS Numbers are assigned to network operators in the RIPE NCC service region.
mnt-by: RIPE-NCC-HM-MNT
created: 2010-05-11T11:46:00Z
last-modified: 2014-02-24T13:15:17Z
source: RIPE

% Information related to 'AS24806'

% Abuse contact for 'AS24806' is 'abuse@forpsi.com'

aut-num: AS24806
org: ORG-ICa1-RIPE
as-name: INTERNET-CZ
descr: Ktis 2, 384 03 Ktis, CZ
remarks: # upstream: import
import: from AS174 accept ANY
import: from AS6830 accept ANY
remarks:
remarks: # upstream: export
export: to AS174 announce AS-INTERNETCZ
export: to AS6830 announce AS-INTERNETCZ
remarks: # peering at NIX.cz Prague: import
import: from AS1257 accept AS-TELE2
import: from AS1902 accept AS-CTT-IT
import: from AS2686 accept AS-IGNEMEA
import: from AS2819 accept AS-GTSCZ-NIX
import: from AS2852 accept AS-CESNET
import: from AS5407 accept AS5407
import: from AS5610 accept AS-CTIOL
import: from AS6706 accept AS6706
import: from AS6881 accept AS-NIX
import: from AS8422 accept AS-NETCOLOGNE
import: from AS8593 accept AS8593
import: from AS8747 accept AS-INWAY
import: from AS8913 accept AS8913
import: from AS9080 accept AS-GIN-NIX
import: from AS9148 accept AS-TGCZ-NIX
import: from AS12306 accept AS-PLUSLINE
import: from AS12570 accept AS12570
import: from AS12767 accept AS-PRAGONET-NIX
import: from AS13036 accept AS13036
import: from AS15494 accept AS-BTCZ
import: from AS15685 accept AS-CASABLANCA
import: from AS15935 accept AS-HA-VEL-CZNIX
import: from AS16019 accept AS16019
import: from AS16075 accept AS-ETELGROUP
import: from AS16246 accept AS16246
import: from AS20723 accept AS20723
import: from AS21430 accept AS21430
import: from AS21435 accept AS21435
import: from AS24828 accept AS24828
import: from AS24930 accept AS-CECOMCZ-NIX
import: from AS24971 accept AS-MASTERCZ-CZNIX
import: from AS25192 accept AS25192
import: from AS25234 accept AS25234
import: from AS25248 accept AS-BLUETONE-CUST
import: from AS25424 accept AS25424
import: from AS25512 accept AS25512
import: from AS28725 accept AS28725
import: from AS29086 accept AS29086
import: from AS29134 accept AS29134
import: from AS29208 accept as-dialtelecom
import: from AS29321 accept AS-CentroNet
import: from AS30134 accept AS30134
import: from AS31246 accept AS-NETBOX-CZNIX
import: from AS33883 accept AS33883
remarks: # peering at NIX.cz Prague: export
export: to AS1257 announce AS-INTCZ-NIX
export: to AS1902 announce AS-INTCZ-NIX
export: to AS2686 announce AS-INTCZ-NIX
export: to AS2819 announce AS-INTCZ-NIX
export: to AS2852 announce AS-INTCZ-NIX
export: to AS5407 announce AS-INTCZ-NIX
export: to AS5610 announce AS-INTCZ-NIX
export: to AS6706 announce AS-INTCZ-NIX
export: to AS6881 announce AS-INTCZ-NIX
export: to AS8422 announce AS-INTCZ-NIX
export: to AS8593 announce AS-INTCZ-NIX
export: to AS8747 announce AS-INTCZ-NIX
export: to AS8913 announce AS-INTCZ-NIX
export: to AS9080 announce AS-INTCZ-NIX
export: to AS9148 announce AS-INTCZ-NIX
export: to AS12306 announce AS-INTCZ-NIX
export: to AS12570 announce AS-INTCZ-NIX
export: to AS12767 announce AS-INTCZ-NIX
export: to AS13036 announce AS-INTCZ-NIX
export: to AS15494 announce AS-INTCZ-NIX
export: to AS15685 announce AS-INTCZ-NIX
export: to AS15935 announce AS-INTCZ-NIX
export: to AS16019 announce AS-INTCZ-NIX
export: to AS16075 announce AS-INTCZ-NIX
export: to AS16246 announce AS-INTCZ-NIX
export: to AS20723 announce AS-INTCZ-NIX
export: to AS21430 announce AS-INTCZ-NIX
export: to AS21435 announce AS-INTCZ-NIX
export: to AS24828 announce AS-INTCZ-NIX
export: to AS24930 announce AS-INTCZ-NIX
export: to AS24971 announce AS-INTCZ-NIX
export: to AS25192 announce AS-INTCZ-NIX
export: to AS25234 announce AS-INTCZ-NIX
export: to AS25248 announce AS-INTCZ-NIX
export: to AS25424 announce AS-INTCZ-NIX
export: to AS25512 announce AS-INTCZ-NIX
export: to AS28725 announce AS-INTCZ-NIX
export: to AS29086 announce AS-INTCZ-NIX
export: to AS29134 announce AS-INTCZ-NIX
export: to AS29208 announce AS-INTCZ-NIX
export: to AS29321 announce AS-INTCZ-NIX
export: to AS30134 announce AS-INTCZ-NIX
export: to AS31246 announce AS-INTCZ-NIX
export: to AS33883 announce AS-INTCZ-NIX
remarks: # peering at SIX.sk Bratislava: import
import: from AS2607 accept AS2607
import: from AS5578 accept AS5578
import: from AS5628 accept AS5628
import: from AS6658 accept AS6658
import: from AS6726 accept AS6726
import: from AS6855 accept AS6855
import: from AS6862 accept AS6862
import: from AS8264 accept AS8264
import: from AS8620 accept AS8620
import: from AS8778 accept AS8778
import: from AS12426 accept AS12426
import: from AS12508 accept AS12508
import: from AS12905 accept AS12905
import: from AS15955 accept AS15955
import: from AS15962 accept AS15962
import: from AS16160 accept AS16160
import: from AS16295 accept AS16295
import: from AS16317 accept AS16317
import: from AS16367 accept AS16367
import: from AS20579 accept AS20579
import: from AS21019 accept AS21019
import: from AS21460 accept AS21460
import: from AS24744 accept AS24744
import: from AS24930 accept AS-CECOMCZ-SIX
import: from AS24980 accept AS24980
import: from AS25496 accept AS25496
import: from AS29208 accept AS29208
import: from AS29405 accept AS29405
import: from AS31117 accept AS31117
import: from AS31127 accept AS31127
import: from AS31679 accept AS31679
remarks:
remarks: # peering at SIX.sk Bratislava: export
export: to AS2607 announce AS-INTERNETCZ
export: to AS5578 announce AS-INTERNETCZ
export: to AS5628 announce AS-INTERNETCZ
export: to AS6658 announce AS-INTERNETCZ
export: to AS6726 announce AS-INTERNETCZ
export: to AS6855 announce AS-INTERNETCZ
export: to AS6862 announce AS-INTERNETCZ
export: to AS8264 announce AS-INTERNETCZ
export: to AS8620 announce AS-INTERNETCZ
export: to AS8778 announce AS-INTERNETCZ
export: to AS12426 announce AS-INTERNETCZ
export: to AS12508 announce AS-INTERNETCZ
export: to AS12905 announce AS-INTERNETCZ
export: to AS15955 announce AS-INTERNETCZ
export: to AS15962 announce AS-INTERNETCZ
export: to AS16160 announce AS-INTERNETCZ
export: to AS16295 announce AS-INTERNETCZ
export: to AS16317 announce AS-INTERNETCZ
export: to AS16367 announce AS-INTERNETCZ
export: to AS20579 announce AS-INTERNETCZ
export: to AS21019 announce AS-INTERNETCZ
export: to AS21460 announce AS-INTERNETCZ
export: to AS24744 announce AS-INTERNETCZ
export: to AS24930 announce AS-INTERNETCZ
export: to AS24980 announce AS-INTERNETCZ
export: to AS25496 announce AS-INTERNETCZ
export: to AS29208 announce AS-INTERNETCZ
export: to AS29405 announce AS-INTERNETCZ
export: to AS31117 announce AS-INTERNETCZ
export: to AS31127 announce AS-INTERNETCZ
export: to AS31679 announce AS-INTERNETCZ
remarks:
remarks: # peering at BIX.hu Budapest: import
import: from AS5507 accept AS-BIX
remarks: # peering at BIX.hu Budapest: export
export: to AS5507 announce AS-INTERNETCZ
remarks:
remarks: peering contact: peering@forpsi.com
remarks: noc contact: noc@forpsi.com
remarks:
admin-c: ES4377-RIPE
tech-c: PK677-RIPE
status: ASSIGNED
mnt-by: RIPE-NCC-END-MNT
tech-c: RADA-RIPE
mnt-by: INTERNET-CZ-MNT
mnt-routes: INTERNET-CZ-MNT
created: 2002-09-24T10:40:59Z
last-modified: 2017-11-15T09:19:19Z
source: RIPE

organisation: ORG-ICa1-RIPE
org-name: INTERNET CZ, a.s.
org-type: LIR
address: Ktis 2
address: 38403
address: Ktis
address: CZECH REPUBLIC
phone: +420 383835353
fax-no: +420 383835354
admin-c: SC279-RIPE
admin-c: ES4377-RIPE
admin-c: RADA-RIPE
admin-c: MG10548-RIPE
admin-c: PK677-RIPE
mnt-ref: INTERNET-CZ-MNT
mnt-ref: RIPE-NCC-HM-MNT
mnt-by: RIPE-NCC-HM-MNT
mnt-by: INTERNET-CZ-MNT
abuse-c: ICZ-RIPE
created: 2004-04-17T11:04:30Z
last-modified: 2017-02-15T06:05:58Z
source: RIPE # Filtered

person: Erich Syrovatka
address: INTERNET CZ, a.s.
address: Ktis 2
address: Ktis
address: 384 03
address: CZ
phone: +420 383835353
nic-hdl: ES4377-RIPE
mnt-by: INTERNET-CZ-MNT
created: 2007-12-11T09:18:22Z
last-modified: 2017-10-30T21:57:50Z
source: RIPE

person: Petr Kolonicz
address: INTERNET CZ,a.s.
address: Ktis2
address: Ktis
address: 38403
address: cz
phone: +420 383835353
nic-hdl: PK677-RIPE
mnt-by: INTERNET-CZ-MNT
created: 2002-04-25T05:53:44Z
last-modified: 2017-10-30T21:45:40Z
source: RIPE # Filtered

person: Michal Rada
address: FORPSI www.forpsi.com
INTERNET CZ, a.s.
Ktis 2
384 03 Ktis
Czech Republic
phone: +420 383835353
nic-hdl: RADA-RIPE
mnt-by: RADA-RIPE-MNT
created: 2010-04-19T09:47:37Z
last-modified: 2017-10-30T22:09:12Z
source: RIPE

% This query was served by the RIPE Database Query Service version 1.91.2 (HEREFORD)

Cdk.cz Domain Registration and Settings

WHOIS

WHOIS Lookup Tool

% (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: Thu Apr 14 19:40:24 2022

domain: cdk.cz
registrant: SB:INETCZ-GXT653-10047
admin-c: INETCZ-GXT653-10047
nsset: FORPSI
keyset: FORPSI-KS-ZLYXERDH
registrar: REG-INTERNET-CZ
registered: 15.03.2004 08:35:00
changed: 12.12.2011 12:33:30
expire: 15.03.2023

contact: SB:INETCZ-GXT653-10047
org: Centrum pro studium demokracie a kultury
name: Lev Doležal
address: Venhudova 17
address: Brno
address: 61400
address: CZ
registrar: REG-INTERNET-CZ
created: 15.03.2004 08:35:00
changed: 15.05.2018 21:32:00

contact: INETCZ-GXT653-10047
name: Lev Doležal
address: Venhudova 17
address: Brno
address: 61400
address: CZ
registrar: REG-INTERNET-CZ
created: 15.03.2004 08:35:00
changed: 15.05.2018 21:32:00

nsset: FORPSI
nserver: ns.forpsi.net
nserver: ns.forpsi.cz (81.2.209.185, 2001:15e8:201:1::d1b9)
nserver: ns.forpsi.it
tech-c: FORPSI
registrar: REG-INTERNET-CZ
created: 01.10.2007 10:19:47
changed: 05.01.2016 11:50:14

contact: FORPSI
org: INTERNET CZ, a.s.
name: Stefano Cecconi
address: Ktiš 2
address: Ktiš
address: 38403
address: CZ
registrar: REG-INTERNET-CZ
created: 04.08.2008 14:42:08
changed: 15.05.2018 21:32:00

keyset: FORPSI-KS-ZLYXERDH
dnskey: 257 3 10 AwEAAaZOnuCrPsDyp48EzH4RSz3OVLscIex9YqU9P1fKhFYBbG9yYitJ/S8mQP+AvJ/z4qpRApgcQvLZ1vva0pngZ0wPY7jBLXS5MZL6MvkQ0ATlc3YPV1FYrKz9wZ3q6IGeFWnAS1misLmFfYFrU5fFYhjPh4N+E1xc9BHaCRsWF48mEoYsLqHR5Dnm0/TecDk6lrz+drS0khskCbFPTHQa93WE0op0fteTgss8cgZx2IWSLT9w5U1Kc9DJpgUHdCdcN+CAODtfCE+qUVRedg1FCrOiIqa5d+iPaDnn7bjuVa043+I+9BF2N0bo4rkosc3MSvKPjbIu0qb/tzdgTphaY8c=
tech-c: FORPSI-KEYSET
registrar: REG-INTERNET-CZ
created: 12.12.2011 12:33:29
changed: 04.12.2018 16:56:56

contact: FORPSI-KEYSET
org: INTERNET CZ, a.s.
name: Stefano Cecconi
address: Ktiš 2
address: Ktiš
address: 38403
address: CZ
registrar: REG-INTERNET-CZ
created: 12.12.2011 11:16:39
changed: 11.11.2019 10:05:22

DNS Records

DNS Lookup Tool

Host	A Record	TTL

Host	MX Record	Priority	TTL

Host	NS Record	TTL

Host	TXT Record	TTL

Cdk.cz HTML Check

HTML Validation Tool

Errors

Legacy doctype. Expected “<!DOCTYPE html>”.

Attribute “xmlns:og” not allowed here.

Attribute “xmlns:article” not allowed here.

Attribute “xmlns:book” not allowed here.

Attribute “xmlns:profile” not allowed here.

Attribute “xmlns:video” not allowed here.

Attribute “xmlns:product” not allowed here.

Attribute “xmlns:content” not allowed here.

Attribute “xmlns:dc” not allowed here.

Attribute “xmlns:foaf” not allowed here.

Attribute “xmlns:rdfs” not allowed here.

Attribute “xmlns:sioc” not allowed here.

Attribute “xmlns:sioct” not allowed here.

Attribute “xmlns:skos” not allowed here.

Attribute “xmlns:xsd” not allowed here.

When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.

The “version” attribute on the “html” element is obsolete. You can safely omit it.

The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.

Bad start tag in “img” in “head”.

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

Stray end tag “noscript”.

Stray end tag “head”.

Start tag “body” seen but an element of the same type was already open.

Cannot recover after last error. Any further errors will be ignored.

Warnings

Attribute with the local name “xmlns:og” is not serializable as XML 1.0.

Attribute with the local name “xmlns:article” is not serializable as XML 1.0.

Attribute with the local name “xmlns:book” is not serializable as XML 1.0.

Attribute with the local name “xmlns:profile” is not serializable as XML 1.0.

Attribute with the local name “xmlns:video” is not serializable as XML 1.0.

Attribute with the local name “xmlns:product” is not serializable as XML 1.0.

Attribute with the local name “xmlns:content” is not serializable as XML 1.0.

Attribute with the local name “xmlns:dc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:foaf” is not serializable as XML 1.0.

Attribute with the local name “xmlns:rdfs” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioc” is not serializable as XML 1.0.

Attribute with the local name “xmlns:sioct” is not serializable as XML 1.0.

Attribute with the local name “xmlns:skos” is not serializable as XML 1.0.

Attribute with the local name “xmlns:xsd” is not serializable as XML 1.0.

Cdk.cz Common Typos

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