DNS Lookup
A free tool that looks up a domain's DNS records (A, AAAA, MX, TXT, NS, CNAME). Check which IP, mail server, or nameserver a domain points to right in your browser with no install.
DNS record lookup
Looks up a domain's DNS records (A, AAAA, MX, TXT, NS, CNAME).
Guide
What are DNS records
They define which IP (A, AAAA), mail server (MX), nameserver (NS), and so on a domain points to. The TTL on each result is how long (in seconds) that record is cached.
Record type
A is an IPv4 address, AAAA is an IPv6 address, MX is a mail server, TXT is text info (SPF, verification, etc.), NS is a nameserver, and CNAME points to an alias.
Practical example and verification criteria
DNS Lookup: First determine whether this page only calculates a format in the browser or the Tool Web server performs a DNS, port, or public-IP lookup. Do not mix a protocol or path into a hostname. Enter IP, MAC, and port values with the separators and ranges requested by the page, and confirm you are authorized to query the target.
DNS Lookup: For a quick check, start with example.com → A / AAAA / MX as a small input whose result relationship you can verify directly. Confirm that the input summary, units, and options match your intent before applying the tool to real values or a copy of the source; this reduces setup mistakes.
DNS Lookup: DNS caches, firewalls, NAT, proxies, and the lookup server's location can make results differ from observations on your device or another network. Recheck the same target with operating-system commands or an authorized management console. Location data is approximate, and a port response alone cannot establish that a service is secure.
DNS Lookup · Work record: For real work, record the input conditions, selected options, and result together. Do not assume the same state will remain after a refresh or device change. Preserve important results separately using copy, download, a screenshot, or another method the page supports, then reopen them in the target environment.
DNS Lookup · Error check: If an error or unexpected result appears, reduce the input, run again with default options, and then change one condition at a time. Recording error messages and boundary values helps distinguish format issues, unsupported cases, and browser resource limits, and prevents an empty result from being mistaken for success.
DNS Lookup · Scope of use: Check the page guidance for browser processing versus server lookup, storage location, and supported scope. Use sensitive source material or secrets only when strictly necessary. High-impact work such as legal, financial, or medical decisions or changes to an operational system requires current authoritative information and a separate verification process.