Website

Answer
200 OKin 245 ms
Ends at
https://www.o2.sk/
Redirects
  • https://o2.sk/ (301)
Title
O2 | Mobilné telefóny, internet a volacie programy
Protocols
HTTP/2
Certificate
DigiCert Inc (Thawte TLS RSA CA G1) for *.o2.sk and o2.sk, valid until
www
Answers itself (200 OK)

DNS records

o2.sk

A
TTL 3 hours
MX
TTL 3 hours
NS
TTL 3 hours
TXT
TTL 3 hours
SOA
  • Primary server
    dns.iol.cz
    Contact
    hostmaster@iol.cz
    Serial
    2026102901
    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.sk

A
TTL 3 hours

_dmarc.o2.sk

TXT
TTL 3 hours

As dns.iol.cz answers them

Reputation

Domain blocklists

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

Rankings

6.09Open PageRank, out of 10
118,090Open PageRank position
297Referring domains

From Open PageRank

WHOIS

Domain:                       o2.sk
Created:                      2004-09-10
Valid Until:                  2027-09-10
Updated:                      2026-03-06
Domain Status:                ok
Nameserver:                   dns.iol.cz
Nameserver:                   ns2.tel.cz
DNSSEC:                       Yes

Domain registrant:            IGN-272720
Name:                         O2 Slovakia, s.r.o.
Organization:                 O2 Slovakia, s.r.o.
Organization ID:              47259116
Phone:                        +421.949949949
Email:                        [email protected]
Street:                       Pribinova 40
City:                         Bratislava
Postal Code:                  811 09
Country Code:                 SK
Authorised Registrar:         REG-366491
Created:                      2022-06-30
Updated:                      2024-07-01

Registrar:                    REG-366491
Name:                         Webglobe, s.r.o.
Organization:                 Webglobe, s.r.o.
Organization ID:              26159708
Phone:                        +420.603111111
Email:                        helpdesk@webglobe.cz
Street:                       Pobřežní 620/3
City:                         Praha 8 - Karlín
Postal Code:                  18600
Country Code:                 CZ
Created:                      2017-09-13
Updated:                      2026-10-27

DNSSEC

Every link from the root to o2.sk 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

sk Verified

  • Found 2 DS records for sk in the . zone
  • DS=56329/SHA-256 has algorithm ECDSAP256SHA256
  • DS=2324/SHA-256 has algorithm ECDSAP256SHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=8763 and DNSKEY=8763 verifies the DS RRset
  • Found 4 DNSKEY records for sk
  • DS=56329/SHA-256 verifies DNSKEY=56329/SEP
  • DS=2324/SHA-256 verifies DNSKEY=2324/SEP
  • Found 1 RRSIGs over DNSKEY RRset
  • RRSIG=56329 and DNSKEY=56329/SEP verifies the DNSKEY RRset

o2.sk Verified

  • Found 1 DS records for o2.sk in the sk zone
  • DS=16795/SHA-256 has algorithm RSASHA256
  • Found 1 RRSIGs over DS RRset
  • RRSIG=63036 and DNSKEY=63036 verifies the DS RRset
  • Found 2 DNSKEY records for o2.sk
  • DS=16795/SHA-256 verifies DNSKEY=16795/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=16795 and DNSKEY=16795/SEP verifies the DNSKEY RRset
  • RRSIG=53574 over the DNSKEY RRset was made with a key that is not trusted here
  • Found 1 RRSIGs over SOA RRset
  • RRSIG=53574 and DNSKEY=53574 verifies the SOA RRset