DNS Lookup
DNS lookup — A, AAAA, MX, NS, TXT, CAA records, DNSSEC status, and A-record propagation across public resolvers.
About this tool
Query public DNS for a domain and review the records that route web traffic, deliver mail, and authorize TLS certificates. Results appear as a readable table with TTL and type badges — not raw zone dumps first.
What you get
- A, AAAA, MX, NS, TXT, CNAME, SOA, and CAA records when present
- DNSSEC indicators and A-record propagation across multiple resolvers
- TTL values with structured SOA and MX presentation
- Country flag, city/region, and network hints for A/AAAA and resolved NS/MX hosts
- Optional raw JSON for scripting or automation
How to use
Enter a domain like example.com and click Lookup. Use only domains you are authorized to check.
Step-by-step playbook
Use this sequence when debugging email bounces, site outages, or stale DNS after a migration.
- Query all record types for the hostname Start with A/AAAA, CNAME, MX, and TXT.
- Compare propagation across public resolvers Spot partial cutovers or stale caches.
- Cross-check mail records with email authentication MX must align with SPF/DMARC expectations.
Sample DNS lookup result
A typical authoritative query for a production domain might return records like these:
| Type | Value |
|---|---|
| A | 203.0.113.10 |
| AAAA | 2001:db8::1 |
| MX | 10 mail.example.com |
| TXT (SPF) | v=spf1 include:_spf.google.com ~all |
| CAA | 0 issue "letsencrypt.org" |
TTL, DNSSEC status, and resolver propagation are shown on the live result page.
Glossary
- A / AAAA
- IPv4 and IPv6 address records that point a hostname to servers.
- MX
- Mail exchanger priority and hostname for inbound email routing.
- TTL
- Time-to-live in seconds — how long resolvers may cache a record before refetching.
- CAA
- Certificate Authority Authorization — restricts which CAs may issue TLS certs for the zone.
- DNSSEC
- Cryptographic signatures that help resolvers detect forged DNS answers.
FAQ
How to look up DNS records for a domain?
Enter a hostname and query A, AAAA, MX, NS, TXT, CNAME, SOA, CAA, and more. Results appear in a table with type, TTL, and values—not raw dumps first.
How to check if DNS has propagated?
Use the A-record propagation section to compare answers from multiple public resolvers and spot stale or missing records after a change.
How to check MX records for email delivery?
Query MX on the domain to see mail exchanger hostnames, priorities, and TTL—essential when debugging inbound mail or migrating email providers.
What is a DNS TTL and why does it matter?
TTL is how long resolvers cache a record in seconds. Lower TTL speeds up cutover; higher TTL reduces query load between changes.
How to look up CAA records for a domain?
Fetch CAA records to see which certificate authorities may issue TLS certs for the hostname—useful before ordering or automating certificates.
Can I check DNSSEC status for a domain?
The report includes DNSSEC indicators when available so you can see whether the zone appears signed and chain validation hints.
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