DNS Lookup & Propagation Checker
Look up DNS records for any domain. Check A, MX, CNAME, TXT, and more. Free, no signup required.
What Is a DNS Lookup Tool?
A DNS lookup tool queries the Domain Name System to retrieve the records associated with a domain name. DNS records map human-readable domain names to IP addresses and configure email routing, domain verification, and other services. Common record types include A (IPv4 address), AAAA (IPv6), MX (mail servers), CNAME (aliases), TXT (verification and SPF), and NS (nameservers). A DNS checker is essential for troubleshooting website connectivity issues, verifying DNS propagation after changes, and auditing your domain's configuration. Visual Sentinel's free DNS checker resolves all major record types in a single query, displays TTL values, and measures resolution time — helping you quickly identify misconfigurations, missing records, or propagation delays without any signup required.
All Record Types
Look up A, AAAA, MX, CNAME, TXT, NS, and SOA records in one query.
Fast Resolution
Get DNS query results in milliseconds with resolution time tracking.
No Signup Required
Look up unlimited domains for free. No account or credit card needed.
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