o2.cz is not available!

  • DNSSEC verified
  • Website up
  • Not on blocklists
Registrar
O2 Czech Republic a.s.
Registered on
Expires on
Last updated
Name servers
Status
  • active
DNSSEC
Signed and verified
Checked
Visit o2.cz

Contacts

  • Holder

    O2WORLDWIDELIMITED

  • Registrar

    O2 Czech Republic a.s. REG-CT

    Za Brumlovkou 266/2
    Praha 4 Michle
    14022
    CZ

    +420.800020202

Website

Answer
200 OKin 166 ms
Ends at
https://www.o2.cz
Redirects
  • https://o2.cz/ (302)
Title
O2 | Mobilní tarify, internet, Oneplay a balíčky O2 Spolu
Server
EWA/3.0
Protocols
HTTP/1.1
Certificate
DigiCert Inc (Thawte TLS RSA CA G1) for *.o2.cz and o2.cz, valid until
www
Answers itself (200 OK)

DNS records

o2.cz

A
TTL 3 hours
AAAA
TTL 3 hours
MX
  • 10smtp-in.o2.cz
TTL 3 hours
NS
TTL 3 hours
TXT
  • 7m05t8bvlcch53s7ys5nrxwxsnrgmphd
  • BzCZOqDSK7VNYlnjcF6OxfxT1TveRa3w68sz57ZbjxMmjM+qEgJcT509Hcr/fPqEcD3bV+qDZh2FegTRtZvcXw==
  • MS=7B9F81FDD83DA2FFCACC2C8F3F61B941A25EDBB4
  • MS=ms52641182
  • PZ3jepCkOh+eOvAvsDTRPHvNHoyzbJLH9ySyuAZFFY4maiTfijGZg4E7xmBQb1R9RmOW+qUkHfl/raEpx37rrA==
  • _9frav04xdjt7z530iuh0x10dk8qxx7o
  • _gtxc5n3vyecj6jtucvxxhjtjzm6y83h
  • apple-domain-verification=VZSWFvHLE8imRQhe
  • browserstack-domain-verification=959efc5e-d239-4b29-972b-846a3587e939
  • google-site-verification=0TIBeL91z3rZRIMY0CZSLblUAbTxh0Kr8BPG3LFtA_8
  • google-site-verification=dmXvwWWa1j3drUuBbW7E0YVtqVGwtB1HY4tN6B9sFSw
  • intersight=56f3c8232259f96eaa965d84ea4b75dfa15ed49b46edcdbe50c16dff242f86b8
  • miro-verification=814cf298c288c6fcf51f6243354f4ff27b13a3d0
  • openai-domain-verification=dv-tAzfKF8XT4xBQdFL2BCoRgVN
  • ppe-87ef0e4514ad3c042110125606a3c6311b5dc64b
  • v=spf1 include:out.o2.cz a:aa.iol.cz ip4:90.176.151.28 include:spf.mailforce.cz include:spfe.targito.com include:o2.secar.cz ip4:74.121.51.138 include:spf.smartemailing.cz include:spf.finforce.cz -all
TTL 3 hours
SOA
  • Primary server
    dns.iol.cz
    Contact
    hostmaster@iol.cz
    Serial
    2026110200
    Refresh
    3 hours
    Retry
    1 hour
    Expire
    30 days
    Negative TTL
    3 hours
TTL 3 hours
CAA
None: any certificate authority may issue for this name

www.o2.cz

A
TTL 3 hours
AAAA
TTL 3 hours

_dmarc.o2.cz

TXT
TTL 3 hours

As ns2.tel.cz answers them

Reputation

Domain blocklists

  • Spamhaus DBL Not listed
  • SURBL Not listed
  • URIBL Not listed

Rankings

26,030 Tranco rank down from 20,054 on 2026-09-28
7.47Open PageRank, out of 10
47,766Open PageRank position
1,059Referring domains

From Tranco and Open PageRank

DNSSEC

Every link from the root to o2.cz verifies.

. Verified

  • Found 3 DNSKEY records for .
  • DS=20326/SHA-256 verifies DNSKEY=20326/SEP
  • DS=38696/SHA-256 verifies DNSKEY=38696/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=38696 and DNSKEY=38696/SEP verifies the DNSKEY RRset

cz Verified

  • Found 1 DS records for cz in the . zone
  • DS=20237/SHA-256 has algorithm ECDSAP256SHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=8763 and DNSKEY=8763 verifies the DS RRset
  • Found 2 DNSKEY records for cz
  • DS=20237/SHA-256 verifies DNSKEY=20237/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=20237 and DNSKEY=20237/SEP verifies the DNSKEY RRset

o2.cz Verified

  • Found 1 DS records for o2.cz in the cz zone
  • DS=46061/SHA-256 has algorithm ECDSAP256SHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=20081 and DNSKEY=20081 verifies the DS RRset
  • Found 2 DNSKEY records for o2.cz
  • DS=46061/SHA-256 verifies DNSKEY=46061/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=38427 over the DNSKEY RRset was made with a key that is not trusted here
  • RRSIG=46061 and DNSKEY=46061/SEP verifies the DNSKEY RRset
  • Found 1 RRSIGs over SOA RRset
  • RRSIG=38427 and DNSKEY=38427 verifies the SOA RRset