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DNS Lookup / IP & Domain Info

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Inspect DNS records and IP details, including A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, PTR, reverse DNS, and basic geo/ISP info.

Enter a domain name or an IP address to inspect DNS records, reverse DNS, and IP details.

Lookup summary

Query
Type
Reverse DNS
PTR
Country
City
Timezone
ISP

Raw JSON

A records

0

AAAA records

0

CNAME records

0

MX records

0

NS records

0

TXT records

0

SOA records

0

CAA records

0

PTR records

0

DNS record types this lookup checks

Use these records to verify website hosting, email routing, domain ownership, certificate authorization, and reverse DNS configuration.

A
IPv4 address

Maps a domain to one or more IPv4 addresses used by web servers, APIs, and other services.

AAAA
IPv6 address

Maps a domain to IPv6 addresses for networks and clients that support IPv6.

CNAME
Alias

Points one hostname to another hostname, often used for CDN, SaaS, and subdomain configuration.

MX
Mail exchange

Defines which mail servers receive email for the domain and their priority order.

NS
Nameservers

Shows the authoritative DNS servers responsible for the domain zone.

TXT
Text records

Stores SPF, DKIM, DMARC, site verification, and other domain metadata.

SOA
Zone authority

Contains the primary nameserver, administrator contact, serial, and timing values for the zone.

CAA
Certificate authority authorization

Controls which certificate authorities are allowed to issue SSL/TLS certificates for the domain.

PTR
Reverse DNS

Maps an IP address back to a hostname, useful for mail servers, logs, and network diagnostics.

Common DNS lookup use cases

Check website DNS

Verify that A, AAAA, CNAME, and NS records point to the expected hosting provider or CDN.

Debug email delivery

Inspect MX and TXT records to confirm mail routing, SPF, DKIM, DMARC, and domain verification.

Audit domain migration

Compare DNS records after changing nameservers, moving hosting, or switching CDN providers.

Investigate an IP address

Use reverse DNS and IP details to identify the hostname, provider, location, and network owner.

DNS troubleshooting checklist

  • Check A and AAAA records when a website does not resolve or points to the wrong server.
  • Check CNAME records for subdomains hosted on a CDN, SaaS platform, or external service.
  • Check MX and TXT records when email delivery, SPF, DKIM, or domain verification fails.
  • Check NS and SOA records after changing DNS providers or nameservers.
  • Remember that DNS propagation and resolver caches can make results differ for a while.

What is a DNS lookup / IP info tool?

A DNS lookup tool lets you inspect domain records such as A, AAAA, CNAME, MX, NS, and TXT.

An IP/domain info tool helps identify reverse DNS, geolocation basics, timezone, ISP, and other useful diagnostics for infrastructure and networking work.

How to use the DNS Lookup tool

  1. Enter a domain name or IP address.
  2. Click Lookup.
  3. Review DNS records, reverse DNS, and IP details.
  4. Use Raw JSON if you want to copy or inspect the full response.

Tips

  • Domain lookups usually return DNS records and may also include basic IP details.
  • IP lookups are useful for reverse DNS and network diagnostics.
  • TXT records often contain SPF, DKIM, verification, or other metadata.
  • DNS results can vary depending on propagation and provider configuration.

Related domain and network tools

After checking DNS records, inspect WHOIS ownership, SSL certificates, redirects, and HTTP headers to understand the full domain setup.

WHOIS Lookup

Check registrar, dates, nameservers, statuses, and raw WHOIS data.
SSL / TLS Certificate Checker

Check certificate validity, expiration, issuer, SANs, OCSP, and TLS details.
Redirect Checker

Trace HTTP redirects, inspect 301/302 chains, and verify final destination URLs.
HTTP Headers Parser

Parse raw HTTP headers into JSON and readable key-value pairs.

Related guides

Learn the workflow behind this tool and what to check next.

Domains and infrastructure

Domain launch validation checklist

A layered domain launch check that catches DNS, certificate, routing, mail, and SEO mistakes before users find them.

Read guide
DNS and domains

How to troubleshoot DNS records for a domain

A practical DNS checklist for website hosting, email records, domain verification, nameserver changes, SSL certificates, and reverse DNS.

Read guide
Networks

IP subnet basics for developers

A practical subnetting guide for reading CIDR notation, checking network ranges, planning private networks, and avoiding address conflicts.

Read guide

DNS checks before changing or debugging a domain

Read DNS records together instead of treating one successful lookup as proof that the whole domain is configured correctly.

Address records

Confirm A and AAAA records point to the intended public endpoints and that old origin addresses are no longer returned.

Mail routing

Review MX priorities and the SPF, DKIM, and verification values published in TXT records before troubleshooting delivery.

Delegation

Compare NS and SOA records with the authoritative DNS provider, especially after a registrar or nameserver migration.

Propagation context

Allow for TTL and resolver caching. A correct result from one resolver does not mean every user sees the new records yet.

A practical example, an edge case, and a maintainer note

Practical example

During a mail setup, check MX plus SPF, DKIM, and DMARC TXT records; a correct website A record says nothing about mail delivery.

Edge case

Different resolvers can return old and new answers during TTL expiry, and a CNAME chain may fail only at one intermediate name.

Maintainer note

I compare authoritative answers with at least one public recursive resolver before calling a DNS migration complete.

Related tools

You may also find these tools useful.

WHOIS Lookup
Check registrar, dates, nameservers, statuses, and raw WHOIS data.
Network & Web
›
SSL / TLS Certificate Checker
Check certificate validity, expiration, issuer, SANs, OCSP, and TLS details.
Network & Web
›
Robots.txt Tester / Generator
Analyze and generate robots.txt rules online.
SEO & Webmaster
›
Redirect Checker
Trace HTTP redirects, inspect 301/302 chains, and verify final destination URLs.
SEO & Webmaster
›

DNS Lookup FAQ

How do I check DNS records for a domain?
Enter the domain name and run the lookup. The tool returns common records such as A, AAAA, CNAME, MX, NS, TXT, SOA, CAA, and PTR when available.
Can I check MX and TXT records?
Yes. The tool supports MX, TXT, A, AAAA, CNAME, and NS lookups.
What is reverse DNS?
Reverse DNS maps an IP address back to a hostname using PTR records. It is often used for mail servers, logging, and network diagnostics.
Can I look up an IP address directly?
Yes. You can enter an IP address to get reverse DNS and basic IP details.
Does the result depend on DNS propagation?
Yes. DNS changes may take time to propagate, so results can differ across resolvers.