Topic cluster

DNS Tools

DNS tools help you see the public records that connect domain names to websites, mail systems, verification services and security policy.

Tools

Focused tools for this topic

Look up DNS records, compare resolver answers and troubleshoot DNS changes with practical DNS tools and guides.

DNS Lookup

Look up A, AAAA, MX, TXT, NS, CNAME and CAA records through an encrypted public DNS-over-HTTPS resolver.

DNS Propagation Checker

Compare DNS records returned by multiple independent public resolvers to see whether a recent DNS change is visible consistently.

Reverse DNS Lookup

Find the optional PTR hostname published for an IPv4 or IPv6 address using encrypted public DNS.

NS Record Lookup

Look up a domain's authoritative nameservers and their DNS TTL values through encrypted public DNS.

TXT Record Lookup

Find public DNS TXT records used for verification, email policy and other domain configuration.

CNAME Record Lookup

Check the canonical hostname targeted by a DNS CNAME alias and view its TTL.

MX Record Lookup

Look up a domain's mail exchangers, priorities and TTL values through encrypted public DNS.

Planned semantic slots

Dedicated A Lookup, Dedicated AAAA Lookup

Overview

What to know before using these checks

A practical DNS workflow

Start with a broad DNS lookup to confirm the record value. If a recent change looks inconsistent, compare multiple public resolvers with the propagation checker.

Use focused record lookups when you already know the record family you need to validate, such as MX for mail routing or TXT for domain verification.

Related guides

Learn the concepts behind the tools

What Is DNS?

A practical explanation of DNS, the system that connects domain names to IP addresses and service records.

DNS Record Types Explained

Understand common DNS record types including A, AAAA, CNAME, MX, TXT, NS, CAA and PTR.

A vs AAAA Record

Learn the difference between DNS A records for IPv4 and AAAA records for IPv6.

DNS Propagation Explained

Understand why DNS changes appear at different times across resolvers and how TTL affects propagation.

FAQ

Common questions

Does DNS propagation mean every resolver updates at the same time?

No. Resolvers cache records according to TTL values and local policy, so different networks can briefly return different answers.

Should a domain use both A and AAAA records?

Only when the service is reachable over both IPv4 and IPv6. Publishing an AAAA record before IPv6 is ready can cause connection failures for some users.