DNS lookup &
propagation checker.
Look up DNS records for any domain. Check A, AAAA, MX, CNAME, TXT, NS, and SOA records, all in one query.
What is a DNS lookup tool?
A DNS lookup tool queries the Domain Name System to retrieve the records associated with a domain. 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), AAAA (IPv6), MX (mail servers), CNAME (aliases), TXT (verification and SPF), and NS (nameservers). A DNS checker is essential for troubleshooting connectivity, verifying 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.
A, AAAA, MX, CNAME, TXT, NS, SOA
Query every major record type in a single lookup. Filter the results by type with the pills above.
Fast resolution
DNS queries return in milliseconds. We show resolution time so you can spot slow nameservers.
No account needed
Look up unlimited domains for free. No account, no email, no credit card.