DNS Record Lookup

Look up DNS records including A, AAAA, MX, NS, SOA, CNAME, TXT, and CAA records for any domain

phonebook.cz

DNS Records

WhoisRDAPDNS RecordsCertificateUptimeDiagnosticsHistoryHide Contact Info

Hosting & Network

phonebook.cz runs on AS204007.

Hosting network
AS204007AS204007
Managed DNS
Self-hosted / other
Email
None
IPv6 (AAAA)
Enabled
CAA pinning
None

Sits alongside 1 other sites on AS204007. Stable here since we started watching (Aug 19, 2026).

DNS Records for phonebook.cz

HostnameTypeTTLPriorityContent
phonebook.czA0185.185.216.245
phonebook.czNS0ns11.constellix.com
phonebook.czNS0ns31.constellix.com
phonebook.czNS0ns51.constellix.net
phonebook.czNS0ns41.constellix.net
phonebook.czNS0ns61.constellix.net
phonebook.czNS0ns21.constellix.com
phonebook.czAAAA02a0b:6580::135
phonebook.czSOA180ns11.constellix.com dns.constellix.com 2015010105 43200 3600 1209600 180

What's up with DNS →

Our daily roundup of the most interesting DNS changes across the web — hosting and CDN migrations, network moves, and security-config shifts.

Ask about phonebook.cz

Beta

Answers use the live DNS records shown on this page. AI-generated — double-check anything important.

Get alerted the moment phonebook.cz's DNS changes

This page is today's snapshot. Turn on monitoring and we'll watch phonebook.cz continuously, notifying you the moment anything moves across all three signals:

Uptime

We visit the site from multiple regions worldwide and email you within minutes if it goes down, with a per-region breakdown so a real outage stands out from a regional blip.

DNS changes

We watch NS, MX, CAA, DNSSEC, CNAME and A/AAAA records, and identify the host, network, and ASN behind them, so a real migration or hijack stands out from routine noise.

TLS certificate

We warn you 30, 14, 7, and 1 days before it expires, and flag it if the issuing authority changes or the certificate is unexpectedly replaced.

Monitor DNS free

Free for your first domain: uptime, DNS, and certificate together. No credit card.

About DNS Records

DNS (Domain Name System) records are instructions that provide information about a domain, including its IP addresses, mail servers, and other services. Common record types include:

  • SOA (Start of Authority) - Contains administrative information about the zone
  • NS (Nameserver) - Specifies authoritative nameservers for the domain
  • A (Address) - Maps a domain to an IPv4 address
  • AAAA - Maps a domain to an IPv6 address
  • CNAME (Canonical Name) - Creates an alias pointing to another domain
  • MX (Mail Exchange) - Specifies mail servers for the domain