DNS Lookup
Query DNS records for any domain. Check propagation across resolvers, reverse DNS, and DNSSEC validation.
Frequently asked questions
What is a DNS lookup?
A DNS lookup queries the Domain Name System to translate a human-readable domain name (like example.com) into the IP addresses, mail servers, and other records that computers use to route traffic. This tool queries public DNS resolvers over HTTPS directly from your browser.
What are the different DNS record types?
A records map a domain to an IPv4 address. AAAA records map to IPv6. CNAME records create aliases. MX records specify mail servers. TXT records hold arbitrary text (often used for SPF, DKIM, and domain verification). NS records delegate to authoritative nameservers. SOA contains zone metadata. SRV records locate services. CAA records control which certificate authorities can issue certificates for a domain.
What is DNS propagation?
When you change a DNS record, the update doesn't appear everywhere instantly. Different DNS resolvers cache records for the duration of the TTL (Time To Live). Propagation is the time it takes for all resolvers worldwide to pick up the new value. This tool checks multiple resolvers simultaneously so you can see if your change has propagated.
What is DNSSEC?
DNSSEC (DNS Security Extensions) adds cryptographic signatures to DNS records, allowing resolvers to verify that a response hasn't been tampered with. When the "DNSSEC Verified" badge appears, it means the resolver validated the cryptographic chain of trust for that domain.
What is reverse DNS (PTR)?
Reverse DNS maps an IP address back to a hostname, the opposite of a normal (forward) DNS lookup. It uses PTR records stored in special .arpa zones. Enter an IP address in the lookup field and this tool will automatically perform a reverse DNS query.
What is TTL?
TTL (Time To Live) is the number of seconds a DNS record can be cached by resolvers before they must query the authoritative server again. Lower TTLs mean changes propagate faster but generate more DNS traffic. Common values range from 300 seconds (5 minutes) to 86400 seconds (24 hours).