web4u.cz is not available!

  • DNSSEC verified
  • Website up
  • Not on blocklists
Registrar
Web4U s.r.o.
Registered on
Expires on
Last updated
Name servers
  • ns2.web4u.cz
  • ns.web4u.cz
Status
  • server update prohibited
  • server transfer prohibited
DNSSEC
Signed and verified
Checked
Visit web4u.cz

Contacts

  • Holder

    WEB4U

  • Registrar

    Web4U s.r.o. REG-WEB4U

    Korunní 2569/108, Vinohrady
    Praha 10
    10100
    CZ

    +420.270001456

Website

Answer
200 OKin 187 ms
Ends at
https://www.web4u.cz/
Redirects
  • https://web4u.cz/ (301)
Title
Profesionální webové služby pro vaši online prezentaci - Web4U
Server
openresty
Protocols
HTTP/2
Certificate
Let's Encrypt (YR1) for web4u.cz and www.web4u.cz, valid until
www
Answers itself (200 OK)

DNS records

web4u.cz

A
TTL 1 min
AAAA
TTL 1 min
MX
  • 10mx.web4u.cz
TTL 1 min
NS
  • ns.web4u.cz
  • ns2.web4u.cz
TTL 1 min
TXT
TTL 1 min
SOA
  • Primary server
    ns.web4u.cz
    Contact
    [email protected]
    Serial
    2026110202
    Refresh
    4 hours
    Retry
    1 hour
    Expire
    14 days
    Negative TTL
    4 hours
TTL 1 min
CAA
TTL 1 min

www.web4u.cz

A
TTL 1 min
AAAA
TTL 1 min

_dmarc.web4u.cz

TXT
TTL 1 min

As ns.web4u.cz answers them

Reputation

Domain blocklists

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

Rankings

6.87Open PageRank, out of 10
26,581Open PageRank position
121Referring domains

From Open PageRank

DNSSEC

Every link from the root to web4u.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

web4u.cz Verified

  • Found 1 DS records for web4u.cz in the cz zone
  • DS=10303/SHA-256 has algorithm ECDSAP384SHA384
  • Found 1 RRSIGs over DS RRset
  • RRSIG=20081 and DNSKEY=20081 verifies the DS RRset
  • Found 3 DNSKEY records for web4u.cz
  • DS=10303/SHA-256 verifies DNSKEY=10303/SEP
  • Found 2 RRSIGs over DNSKEY RRset
  • RRSIG=10038 over the DNSKEY RRset was made with a key that is not trusted here
  • RRSIG=10303 and DNSKEY=10303/SEP verifies the DNSKEY RRset
  • Found 1 RRSIGs over SOA RRset
  • RRSIG=10038 and DNSKEY=10038 verifies the SOA RRset