Casopis-sifra.cz Časopis Šifra | Časopis a web pro ty, kteří čtou i mezi řádky

Casopis-sifra.cz Overview

Casopis-sifra.cz ranking shows that the page is at position 639,065 over the world.

Casopis-sifra.cz hosting company servers are placed in the United States, but, unfortunately, it’s not possible to identify the countries where the bulk of casopis-sifra.cz users come from and, therefore, we couldn’t define if the distance can influence the webpage load time. See the list of other webpages hosted on AS-CHOOPA - Choopa, LLC, US servers.

In terms of rank-to-traffic ratio, casopis-sifra.cz has 715 unique users per day, viewing 1,144 pages. The rank based value of casopis-sifra.cz is 9,461 USD. Every user makes 1.73 pageviews on average.

Casopis-sifra.cz boasts a link base consisting of 434 referring domains and 500 external backlinks, as revealed by the data obtained from web network scanning.

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

According the last verification test in August 05, 2024, casopis-sifra.cz has an expired SSL certificate issued by Let's Encrypt (expired on October 05, 2024). 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, Google Safe Search and Symantec casopis-sifra.cz is a fairly safe domain.

According the Mobile-Friendly test by Google casopis-sifra.cz is nice optimized for mobile devices and tablets.

Casopis-sifra.cz Rank Summary

Global Rank

639,065

Average Load Time

0.00sec

Links In Count

Website Value

$8,760

Audience Geography. Where are casopis-sifra.cz visitors located?

Country	Visitors

Country	Pageviews

Country	Rank

Where do visitors go on casopis-sifra.cz?

Subdomain	Pageviews

Subdomain	Pageviews per User

Subdomain	Reach

How popular is casopis-sifra.cz?

Period	Global Rank	Global Rank Delta
past 3 months	639065	340793

Days	Pageviews Rank	Pageviews Rank Delta	Pageviews per Million	Pageviews per Million Delta	Pageviews per User	Pageviews per User Delta
90	855120	434886	3	-59.326%	1.6	3%

Days	Reach Rank	Reach Rank Delta	Reach per Million	Reach per Million Delta
90	584130	315058	8	-60.419%

Casopis-sifra.cz Website Safety

Overview

Last Updated: 10/27/2025

Overall result - casopis-sifra.cz is safe.

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: 03/25/2025

casopis-sifra.cz is safe.

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

Google Safe Search

Last Updated: 09/05/2019

casopis-sifra.cz is safe.

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: 01/09/2019

casopis-sifra.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: 02/25/2021

casopis-sifra.cz is safe.

McAfee assesses casopis-sifra.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 casopis-sifra.cz for mature or inappropriate content, only security checks are evaluated.

Web of Trust

Last Updated: 10/27/2025

casopis-sifra.cz child safety is unknown.

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

SSL Information

SSL Checker Tool

Domain	casopis-sifra.cz
Issuer Organization	Let's Encrypt
Issuer	R11
Algorithm	RSA-SHA256
Valid form	07/07/2024
Expiration	10/05/2024
Signed	Certificate is not self signed
Additional Domains	casopis-sifra.cz www.casopis-sifra.cz

Casopis-sifra.cz Rank History

Alexa Rank shows how popular casopis-sifra.cz is in comparison with other sites. The most popular site has Alexa Rank equals 1. If casopis-sifra.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 casopis-sifra.cz and pageviews on casopis-sifra.cz over the past 3 months.

Casopis-sifra.cz Hosting Information

Server Location

Geolocation Tool

ASN Information

ASN Lookup Tool

ASN ID: 20473

ASN Title: AS-CHOOPA - Choopa, LLC, US

Last Update: 08/29/2025

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

ASNumber: 20473
ASName: AS-CHOOPA
ASHandle: AS20473
RegDate: 2001-05-10
Updated: 2012-03-02
Ref: https://rdap.arin.net/registry/autnum/20473

OrgName: Choopa, LLC
OrgId: CHOOP-1
Address: 14 Cliffwood Ave Suite 300
City: Matawan
StateProv: NJ
PostalCode: 07747
Country: US
RegDate: 2006-10-03
Updated: 2016-01-11
Comment: http://www.choopa.net/
Ref: https://rdap.arin.net/registry/entity/CHOOP-1

OrgAbuseHandle: ABUSE1143-ARIN
OrgAbuseName: Abuse Department
OrgAbusePhone: +1-973-849-0500
OrgAbuseEmail: abuse@choopa.com
OrgAbuseRef: https://rdap.arin.net/registry/entity/ABUSE1143-ARIN

OrgTechHandle: NETWO1159-ARIN
OrgTechName: Network Operations
OrgTechPhone: +1-973-849-0500
OrgTechEmail: network@choopa.com
OrgTechRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN

OrgNOCHandle: NETWO1159-ARIN
OrgNOCName: Network Operations
OrgNOCPhone: +1-973-849-0500
OrgNOCEmail: network@choopa.com
OrgNOCRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN

RTechHandle: NETWO1159-ARIN
RTechName: Network Operations
RTechPhone: +1-973-849-0500
RTechEmail: network@choopa.com
RTechRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN

RNOCHandle: NETWO1159-ARIN
RNOCName: Network Operations
RNOCPhone: +1-973-849-0500
RNOCEmail: network@choopa.com
RNOCRef: https://rdap.arin.net/registry/entity/NETWO1159-ARIN

RAbuseHandle: ABUSE1143-ARIN
RAbuseName: Abuse Department
RAbusePhone: +1-973-849-0500
RAbuseEmail: abuse@choopa.com
RAbuseRef: https://rdap.arin.net/registry/entity/ABUSE1143-ARIN

#
# ARIN WHOIS data and services are subject to the Terms of Use
# available at: https://www.arin.net/whois_tou.html
#
# If you see inaccuracies in the results, please report at
# https://www.arin.net/resources/whois_reporting/index.html
#
# Copyright 1997-2018, American Registry for Internet Numbers, Ltd.
#

Casopis-sifra.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: 3.15.0
% Timestamp: Wed Mar 05 12:55:44 2025

domain: casopis-sifra.cz
registrant: SUB-1104021
admin-c: ITWPHOST
nsset: WP-HOSTING-CZ-20190818175703
keyset: AUTO-MQIH6W64I6FG26R41BZ2QUKIT
registrar: REG-GRANSY
registered: 29.09.2014 22:35:27
changed: 25.03.2020 20:12:05
expire: 29.09.2027

contact: SUB-1104021
org: Šifra Media Klub, z. s.
name: Milan Vidlák
address: Rybná 716/24
address: Praha 1
address: 11000
address: CZ
registrar: REG-GRANSY
created: 24.10.2018 07:59:05
changed: 19.08.2020 19:33:03

contact: ITWPHOST
org: IT & WP HOST s.r.o.
name: Pavel Urbánek
address: Lesní 1131/19
address: Plzeň
address: 31200
address: CZ
registrar: REG-MOJEID
created: 22.04.2017 10:49:58
changed: 12.02.2018 21:19:19

nsset: WP-HOSTING-CZ-20190818175703
nserver: ns.gransy.com
nserver: ns2.gransy.com
nserver: ns3.gransy.com
nserver: ns4.gransy.com
nserver: ns5.gransy.com
tech-c: SUB-1104021
registrar: REG-GRANSY
created: 18.08.2019 17:57:04
changed: 11.12.2024 09:36:25

keyset: AUTO-MQIH6W64I6FG26R41BZ2QUKIT
dnskey: 256 3 7 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
dnskey: 257 3 7 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
tech-c: CZNIC-AKM
registrar: REG-CZNIC
created: 21.09.2019 14:24:03
changed: 12.02.2025 16:01:22

contact: CZNIC-AKM
org: CZ.NIC, z.s.p.o.
name: CZ.NIC, z.s.p.o.
address: Milesovska 1136/5
address: Praha 3
address: 13000
address: CZ
registrar: REG-CZNIC
created: 12.08.2024 15:02:38

DNS Records

DNS Lookup Tool

Host	A Record	TTL
casopis-sifra.cz	140.82.37.248	600

Host	MX Record	Priority	TTL
casopis-sifra.cz	mx2.emailsrvr.com	20	600
casopis-sifra.cz	mx1.emailsrvr.com	10	600

Host	NS Record	TTL
casopis-sifra.cz	ns2.gransy.com	1800
casopis-sifra.cz	ns.gransy.com	1800
casopis-sifra.cz	ns5.gransy.com	1800
casopis-sifra.cz	ns3.gransy.com	1800
casopis-sifra.cz	ns4.gransy.com	1800

Host	TXT Record	TTL
casopis-sifra.cz	v=spf1 include:_spf.elasticemail.com include:emailsrvr.com include:_spf.mailersend.net ~all	600

ns.gransy.com
TTL: 1800
Email address: root.gransy.com
Serial: 2725279701
Refresh: 86400
Retry: 900
Expire: 1209600
Minimum: 1800

Casopis-sifra.cz HTML Check

HTML Validation Tool

Errors

Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.

Bad value “auto” for attribute “width” on element “img”: Expected a digit but saw “a” instead.

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

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

Attribute “property” not allowed on element “link” at this point.

No space between attributes.

The “sizes” attribute may be specified only if the “srcset” attribute is also present.

Duplicate ID “fb-root”.

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

Attribute “as” not allowed on element “link” at this point.

Duplicate ID “contact-form-7-css”.

Duplicate ID “cookie-notice-front-css”.

Duplicate ID “rs-plugin-settings-css”.

Duplicate ID “google-fonts-style-css”.

Duplicate ID “js_composer_front-css”.

Duplicate ID “td-theme-css”.

Duplicate ID “td-theme-demo-style-css”.

Duplicate ID “hm_custom_css-css”.

Duplicate ID “rs-icon-set-fa-icon-css”.

Duplicate ID “dashicons-css”.

Duplicate ID “thickbox-css”.

Duplicate ID “rs-particles-front-css”.

Duplicate ID “rs-revealer-front-css”.

Duplicate ID “rs-revealer-front-preloaders-css”.

Duplicate ID “su-content-shortcodes-css”.

Warnings

The first occurrence of ID “fb-root” was here.

The first occurrence of ID “contact-form-7-css” was here.

The first occurrence of ID “cookie-notice-front-css” was here.

The first occurrence of ID “rs-plugin-settings-css” was here.

The first occurrence of ID “google-fonts-style-css” was here.

The first occurrence of ID “js_composer_front-css” was here.

The first occurrence of ID “td-theme-css” was here.

The first occurrence of ID “td-theme-demo-style-css” was here.

The first occurrence of ID “hm_custom_css-css” was here.

The first occurrence of ID “rs-icon-set-fa-icon-css” was here.

The first occurrence of ID “dashicons-css” was here.

The first occurrence of ID “thickbox-css” was here.

The first occurrence of ID “rs-particles-front-css” was here.

The first occurrence of ID “rs-revealer-front-css” was here.

The first occurrence of ID “rs-revealer-front-preloaders-css” was here.

The first occurrence of ID “su-content-shortcodes-css” was here.

Casopis-sifra.cz Desktop Performance

Last tested: 01/04/2020

Desktop Speed

81%

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

Avoid landing page redirects

Optimize images

Leverage browser caching

Minify JavaScript

Desktop Resource Breakdown

Total Resources	78
Number of Hosts	9
Static Resources	7
JavaScript Resources	18
CSS Resources	16

Casopis-sifra.cz Mobile Insights

Last tested: 07/17/2018

Mobile Usability

99%

Size tap targets appropriately

Mobile Speed

75%

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

Prioritize visible content

Reduce server response time

Leverage browser caching

Optimize images

Minify JavaScript

Mobile Resource Breakdown

Total Resources	119
Number of Hosts	16
Static Resources	87
JavaScript Resources	50
CSS Resources	19

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Casopis-sifra.cz Časopis Šifra | Časopis a web pro ty, kteří čtou i mezi řádky

Casopis-sifra.cz Overview

Casopis-sifra.cz Rank Summary

Casopis-sifra.cz Website Safety

Casopis-sifra.cz Rank History

Casopis-sifra.cz Hosting Information

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