DNS Lookup / IP & Domain Info
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
Raw JSON
A records
0AAAA records
0CNAME records
0MX records
0NS records
0TXT records
0SOA records
0CAA records
0PTR records
0DNS record types this lookup checks
Use these records to verify website hosting, email routing, domain ownership, certificate authorization, and reverse DNS configuration.
Maps a domain to one or more IPv4 addresses used by web servers, APIs, and other services.
Maps a domain to IPv6 addresses for networks and clients that support IPv6.
Points one hostname to another hostname, often used for CDN, SaaS, and subdomain configuration.
Defines which mail servers receive email for the domain and their priority order.
Shows the authoritative DNS servers responsible for the domain zone.
Stores SPF, DKIM, DMARC, site verification, and other domain metadata.
Contains the primary nameserver, administrator contact, serial, and timing values for the zone.
Controls which certificate authorities are allowed to issue SSL/TLS certificates for the domain.
Maps an IP address back to a hostname, useful for mail servers, logs, and network diagnostics.
Common DNS lookup use cases
Verify that A, AAAA, CNAME, and NS records point to the expected hosting provider or CDN.
Inspect MX and TXT records to confirm mail routing, SPF, DKIM, DMARC, and domain verification.
Compare DNS records after changing nameservers, moving hosting, or switching CDN providers.
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
- Enter a domain name or IP address.
- Click Lookup.
- Review DNS records, reverse DNS, and IP details.
- 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.
Check registrar, dates, nameservers, statuses, and raw WHOIS data.
Check certificate validity, expiration, issuer, SANs, OCSP, and TLS details.
Trace HTTP redirects, inspect 301/302 chains, and verify final destination URLs.
Parse raw HTTP headers into JSON and readable key-value pairs.
Related guides
Learn the workflow behind this tool and what to check next.
How to validate a domain before launch
A launch workflow for confirming DNS records, domain ownership signals, SSL coverage, and security headers on the public endpoint.
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.
IP subnet basics for developers
A practical subnetting guide for reading CIDR notation, checking network ranges, planning private networks, and avoiding address conflicts.
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.
Privacy and usage
Built for quick checks without an account
Toolinix tools are designed for short developer tasks: paste a safe sample, inspect the result, copy what you need, and move on.
No login required
You can use the tools without creating an account, subscribing to a newsletter, or saving a workspace.
Local when possible
Formatters, generators, encoders, and text utilities generally run in your browser. Network diagnostics may need a server-assisted lookup to check public URLs, domains, or IPs.
Keep secrets out
Do not paste production passwords, private keys, access tokens, customer records, or regulated data into online tools unless your own security policy allows it.
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