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blesk.cz
Verifying against the live site and live WHOIS/DNS…
Common questions
Is blesk.cz legit or a scam?
blesk.cz was registered Sep 6, 1997 (29 years old), per public registration records. AboutUs doesn't label sites "legit" or "a scam": this page lists the dated registration, DNS, HTTPS, mail-authentication and safety checks we could verify, each with its source, so you can decide for yourself.
Who owns blesk.cz?
Nobody has completed AboutUs's owner verification for blesk.cz. That's true of most sites here — it isn't itself a warning sign.
When was blesk.cz registered?
blesk.cz's registration dates to Sep 6, 1997 (29 years old), per public registration records. Webglobe, s.r.o. is the registrar on record today.
Add the HSTS, Content-Security-Policy, and X-Frame-Options response headers.
AboutUs has not vetted this site. Everything below is what we could measure automatically. Anything you do on the site — paying, sharing personal details, downloading — is between you and the site, not AboutUs.
Current facts
Latest available measurements; dated entries retain their dates. These are measurements, not an endorsement of the site.
latest result
Domain registered Sep 6, 1997 — 29 years old.
latest result
Registrar on record: Webglobe, s.r.o. — unchanged since AboutUs began tracking (Nov 6, 2026).
Authority 78/100— ahead of 78% of the August 2026 scored sampleClear
Why this authority score
78 is a percentile: higher than 78% of sites we score.
How it's calculated
Prominence (Tranco rank #6,801)+8
Verified continuity: 29.2 years (RDAP registration)+11
Security & email hygiene+4
Calibration adjustment (published map)+17
Model score: 40/99 — what these reason lines add up to.
Published Authority (percentile): 78/100 — this site's rank against the August 2026 scored sample. Public Authority is capped at 99.
Safety evidence
No unexpired threat-feed result; name-similarity check available (recorded about 4 days ago); 3/3 transport and email checks available (oldest recorded about 4 days ago). This is evidence coverage, not a probability that a website is safe.
What blesk.cz said about itself, 2006
Quoted from the site's AboutUs wiki page in each year it changed (1 version). These are the page's own words at the time, not AboutUs's assessment. New words · dropped words
2006
Blesk online - webová verze deníku Blesk, týdeníku Nedělní Blesk a Blesk Magazín. 24 hodin denně, 7 dní v týdnu.
Site history
Dated record — historical facts always carry their date.
1997
Domain registered (Sep 6, 1997).
2006
First tracked by AboutUs (Jun 19, 2006); profile edited 4 times through 2014.
✓ domain continuity 29 years registered✓ live verified Nov 6, 2026
Missing DMARC (mild)
Lifeline · blesk.cz over time
Checked in the last 30 daysOlder, dated recordFrom registration records
Registered 29 years ago · on AboutUs since 2006 · 1 registrar change since Jan 8, 2009 · no registrant change on record since 2009 · last checked Nov 1, 2026.
Registration
RegisteredSep 6, 1997blesk.cz was registered on Sep 6, 1997.Source: RDAP, fetched Oct 25, 2026
AboutUs record
AboutUs wiki pageAboutUs wiki pageJun 19, 2006 – Apr 20, 2014An AboutUs wiki page described blesk.cz from Jun 19, 2006 to Apr 20, 2014 (4 edits).Source: AboutUs wiki archive, 2006–2023Said about itself in 2006Jul 1, 2006
Registrar
REG-IGNUMREG-IGNUMJan 8, 2009 – Oct 18, 2021Registrar REG-IGNUM in the WHOIS and RDAP records held for blesk.cz, from Jan 8, 2009 to Oct 18, 2021.Source: WHOIS / RDAP archive (who.is)REG-WEBGLOBE
Registrant
Registrant recordsJan 8, 2009 – Jun 26, 2026Registration records for blesk.cz are held from Jan 8, 2009 to Jun 26, 2026 (143 records). None shows a change of registrant. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
No registrant changes recorded, 2009–2026
Zone file
Nameservers: ringier.cz, sbone.czJan 8, 2009 – Jan 3, 2012Registration records listed ringier.cz, sbone.cz nameservers (ns.ringier.cz, ns.sbone.cz) for blesk.cz from Jan 8, 2009 to Jan 3, 2012.Source: From registration records (WHOIS / RDAP archive, who.is)
Certificate
AmazonAmazonDec 3, 2025 – Nov 6, 2026Amazon issued 8 certificates for blesk.cz from Dec 3, 2025, the latest valid until May 19, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
200020102020Jan ’26Oct ’26← last 12 months, drawn wider
Every dated fact on this lifeline (21)
Sep 6, 1997Registration: blesk.cz was registered on Sep 6, 1997.Source: RDAP, fetched Oct 25, 2026
Jun 19, 2006 – Apr 20, 2014AboutUs record: An AboutUs wiki page described blesk.cz from Jun 19, 2006 to Apr 20, 2014 (4 edits).Source: AboutUs wiki archive, 2006–2023
Jul 1, 2006AboutUs record: “Blesk online - webová verze deníku Blesk, týdeníku Nedělní Blesk a Blesk Magazín. 24 hodin denně, 7 dní v týdnu.”Source: AboutUs wiki archive, 2006
Jan 8, 2009 – Oct 18, 2021Registrar: Registrar REG-IGNUM in the WHOIS and RDAP records held for blesk.cz, from Jan 8, 2009 to Oct 18, 2021.Source: WHOIS / RDAP archive (who.is)
Jan 8, 2009 – Jun 26, 2026Registrant: Registration records for blesk.cz are held from Jan 8, 2009 to Jun 26, 2026 (143 records). None shows a change of registrant. Privacy-service and redaction changes, renames of the same organization and new contacts at it are not counted.Source: WHOIS / RDAP archive (who.is); counted by registrant name and organization only
Jan 8, 2009 – Jan 3, 2012Zone file: Registration records listed ringier.cz, sbone.cz nameservers (ns.ringier.cz, ns.sbone.cz) for blesk.cz from Jan 8, 2009 to Jan 3, 2012.
“Blesk online - webová verze deníku Blesk, týdeníku Nedělní Blesk a Blesk Magazín. 24 hodin denně, 7 dní v týdnu.”
Source: AboutUs wiki archive, 2006
Current AboutUs recordJul 18, 2026 – Nov 1, 2026 (latest)Authority and Safety last refreshed Nov 1, 2026.Source: AboutUs checks
REG-WEBGLOBE
Dec 20, 2021 – Jun 26, 2026 (latest)
Registrar REG-WEBGLOBE in the WHOIS and RDAP records held for blesk.cz, from Dec 20, 2021 to Jun 26, 2026.
Source: WHOIS / RDAP archive (who.is)
Nameservers: ignum.cz, ringier.cz
Feb 16, 2012 – Jan 1, 2015
Registration records listed ignum.cz, ringier.cz nameservers (ns.ringier.cz, ns2.ignum.cz) for blesk.cz from Feb 16, 2012 to Jan 1, 2015.
Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to ignum.cz, ringier.czFeb 16, 2012blesk.cz's nameservers moved from ringier.cz, sbone.cz to ignum.cz, ringier.cz between Jan 3, 2012 and Feb 16, 2012. Last seen at ringier.cz, sbone.cz: Jan 3, 2012 (registration record). First seen at ignum.cz, ringier.cz: Feb 16, 2012 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: cncenter.cz, ignum.czNameservers: cncenter.cz, ignum.czJan 9, 2015 – May 19, 2022Registration records listed cncenter.cz, ignum.cz nameservers (ns.cncenter.cz, ns2.ignum.cz) for blesk.cz from Jan 9, 2015 to May 19, 2022.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to cncenter.cz, ignum.czJan 9, 2015blesk.cz's nameservers moved from ignum.cz, ringier.cz to cncenter.cz, ignum.cz between Jan 1, 2015 and Jan 9, 2015. Last seen at ignum.cz, ringier.cz: Jan 1, 2015 (registration record). First seen at cncenter.cz, ignum.cz: Jan 9, 2015 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: webglobe.com, webglobe.czJul 2, 2022 – Nov 2, 2023Registration records listed webglobe.com, webglobe.cz nameservers (ns1.webglobe.cz, ns2.webglobe.cz, ns3.webglobe.com) for blesk.cz from Jul 2, 2022 to Nov 2, 2023.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to webglobe.com, webglobe.czJul 2, 2022blesk.cz's nameservers moved from cncenter.cz, ignum.cz to webglobe.com, webglobe.cz between May 19, 2022 and Jul 2, 2022. Last seen at cncenter.cz, ignum.cz: May 19, 2022 (registration record). First seen at webglobe.com, webglobe.cz: Jul 2, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Nameservers: CloudflareNameservers: CloudflareDec 1, 2023 – Jun 26, 2026Registration records listed Cloudflare nameservers (josephine.ns.cloudflare.com, rick.ns.cloudflare.com) for blesk.cz from Dec 1, 2023 to Jun 26, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
DNS moved to CloudflareDec 1, 2023blesk.cz's nameservers moved from webglobe.com, webglobe.cz to Cloudflare between Nov 2, 2023 and Dec 1, 2023. Last seen at webglobe.com, webglobe.cz: Nov 2, 2023 (registration record). First seen at Cloudflare: Dec 1, 2023 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Let's Encrypt
Aug 10, 2026 – Nov 6, 2026 (latest)
Let's Encrypt issued 148 certificates for blesk.cz from Aug 10, 2026, the latest valid until Feb 3, 2027. Seen in use on Oct 9, 2026.
Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 9, 2026
Google Trust ServicesAug 17, 2026 – Nov 6, 2026Google Trust Services issued 8 certificates for blesk.cz from Aug 17, 2026, the latest valid until Jan 13, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
ZeroSSL GmbHSep 2, 2026 – Nov 6, 2026ZeroSSL GmbH issued 2 certificates for blesk.cz from Sep 2, 2026, the latest valid until Jan 30, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
SSL CorporationOct 2, 2026 – Nov 6, 2026SSL Corporation issued 2 certificates for blesk.cz from Oct 2, 2026, the latest valid until Dec 30, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 16, 2012 – Jan 1, 2015Zone file: Registration records listed ignum.cz, ringier.cz nameservers (ns.ringier.cz, ns2.ignum.cz) for blesk.cz from Feb 16, 2012 to Jan 1, 2015.Source: From registration records (WHOIS / RDAP archive, who.is)
Feb 16, 2012Zone file: blesk.cz's nameservers moved from ringier.cz, sbone.cz to ignum.cz, ringier.cz between Jan 3, 2012 and Feb 16, 2012. Last seen at ringier.cz, sbone.cz: Jan 3, 2012 (registration record). First seen at ignum.cz, ringier.cz: Feb 16, 2012 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Jan 9, 2015 – May 19, 2022Zone file: Registration records listed cncenter.cz, ignum.cz nameservers (ns.cncenter.cz, ns2.ignum.cz) for blesk.cz from Jan 9, 2015 to May 19, 2022.Source: From registration records (WHOIS / RDAP archive, who.is)
Jan 9, 2015Zone file: blesk.cz's nameservers moved from ignum.cz, ringier.cz to cncenter.cz, ignum.cz between Jan 1, 2015 and Jan 9, 2015. Last seen at ignum.cz, ringier.cz: Jan 1, 2015 (registration record). First seen at cncenter.cz, ignum.cz: Jan 9, 2015 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Dec 20, 2021 – Jun 26, 2026Registrar: Registrar REG-WEBGLOBE in the WHOIS and RDAP records held for blesk.cz, from Dec 20, 2021 to Jun 26, 2026.Source: WHOIS / RDAP archive (who.is)
Jul 2, 2022 – Nov 2, 2023Zone file: Registration records listed webglobe.com, webglobe.cz nameservers (ns1.webglobe.cz, ns2.webglobe.cz, ns3.webglobe.com) for blesk.cz from Jul 2, 2022 to Nov 2, 2023.Source: From registration records (WHOIS / RDAP archive, who.is)
Jul 2, 2022Zone file: blesk.cz's nameservers moved from cncenter.cz, ignum.cz to webglobe.com, webglobe.cz between May 19, 2022 and Jul 2, 2022. Last seen at cncenter.cz, ignum.cz: May 19, 2022 (registration record). First seen at webglobe.com, webglobe.cz: Jul 2, 2022 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Dec 1, 2023 – Jun 26, 2026Zone file: Registration records listed Cloudflare nameservers (josephine.ns.cloudflare.com, rick.ns.cloudflare.com) for blesk.cz from Dec 1, 2023 to Jun 26, 2026.Source: From registration records (WHOIS / RDAP archive, who.is)
Dec 1, 2023Zone file: blesk.cz's nameservers moved from webglobe.com, webglobe.cz to Cloudflare between Nov 2, 2023 and Dec 1, 2023. Last seen at webglobe.com, webglobe.cz: Nov 2, 2023 (registration record). First seen at Cloudflare: Dec 1, 2023 (registration record).Source: Derived from the nameserver records on this lifeline (registration record → registration record)
Dec 3, 2025 – Nov 6, 2026Certificate: Amazon issued 8 certificates for blesk.cz from Dec 3, 2025, the latest valid until May 19, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Jul 18, 2026 – Nov 1, 2026AboutUs record: Authority and Safety last refreshed Nov 1, 2026.Source: AboutUs checks
Aug 10, 2026 – Nov 6, 2026Certificate: Let's Encrypt issued 148 certificates for blesk.cz from Aug 10, 2026, the latest valid until Feb 3, 2027. Seen in use on Oct 9, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader); TLS check, Oct 9, 2026
Aug 17, 2026 – Nov 6, 2026Certificate: Google Trust Services issued 8 certificates for blesk.cz from Aug 17, 2026, the latest valid until Jan 13, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Sep 2, 2026 – Nov 6, 2026Certificate: ZeroSSL GmbH issued 2 certificates for blesk.cz from Sep 2, 2026, the latest valid until Jan 30, 2027.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)
Oct 2, 2026 – Nov 6, 2026Certificate: SSL Corporation issued 2 certificates for blesk.cz from Oct 2, 2026, the latest valid until Dec 30, 2026.Source: Certificate Transparency logs (AboutUs's own certificate-log reader)