Free DNS Lookup Tool

DNS (Domain Name System) is the internet's phone book. It translates human-readable domain names like google.com into IP addresses like 142.250.80.46 that computers use to communicate. Without DNS, you would need to memorize numeric IP addresses for every website you visit.

A DNS lookup is the process of querying a DNS server to find the IP address or other records associated with a domain name. When you type a website address in your browser, your device performs a DNS lookup to find the server's IP address before loading the page. Our tool lets you manually query these records to inspect a domain's DNS configuration.

The main DNS record types are: A records (map a domain to an IPv4 address), AAAA records (map to IPv6), MX records (specify mail servers), NS records (identify authoritative nameservers), CNAME records (create aliases pointing to another domain), TXT records (store text data like SPF, DKIM, and verification tokens), and SOA records (contain zone administration information).

DNS propagation is the time it takes for DNS changes to spread across all DNS servers worldwide. When you update a DNS record, the change does not take effect instantly. DNS servers around the world cache records based on TTL (Time to Live) values. Propagation typically takes anywhere from a few minutes to 48 hours, depending on the TTL of the old record.

An MX (Mail Exchange) record specifies which mail servers are responsible for receiving email for a domain. MX records include a priority value, where lower numbers indicate higher priority. For example, a domain using Google Workspace would have MX records pointing to Google's mail servers like aspmx.l.google.com.

TTL (Time to Live) is a value in a DNS record that tells DNS resolvers how long to cache the record before requesting a fresh copy from the authoritative server. TTL is measured in seconds. A TTL of 3600 means the record is cached for 1 hour. Lower TTLs mean changes propagate faster but generate more DNS queries. Higher TTLs reduce DNS traffic but slow down propagation of updates.

DNS is the system itself, the global network of servers that translates domain names to IP addresses. nslookup is a command-line tool used to query DNS servers. Our online DNS lookup tool provides the same functionality as nslookup but in a web-based interface, so you do not need to open a terminal or remember command syntax.

DNS records might not appear for several reasons: the domain may not exist or is not registered, the records have not been created yet in your DNS provider's control panel, DNS propagation is still in progress after a recent change, or the specific record type you are querying does not exist for that domain. Try checking with your domain registrar to confirm your records are configured correctly.