DNS Lookup — Forward & Reverse
Query DNS records for any domain — or run a reverse (PTR) lookup on an IP. Runs in your browser via secure DNS-over-HTTPS.
About this tool
This runs the same queries you would run with nslookup or dig, but from a browser. Enter a hostname and pick a record type — A, AAAA, CNAME, MX, TXT, NS or SOA — or leave it on All records to fetch each of them in one pass. Enter an IPv4 address with the PTR option and the tool builds the in-addr.arpa name and runs the reverse lookup for you.
It is built for the moment something is broken: mail is bouncing, a cutover has not taken effect, or a certificate validation TXT record is missing. Queries are not processed in your browser — they are sent to Google's public DNS-over-HTTPS resolver, so the hostname you type does leave your machine. Using a public resolver rather than your internal one shows what the outside world sees, which is usually the question that matters. If DNS changes are part of a larger move, see our cloud migration & administration service.
How to use it
Enter a name, choose a type, then read the result table:
- Name — the record that answered, which may differ from what you typed if a CNAME was followed.
- Value — an address for A and AAAA, a priority plus mail host for MX, the quoted string for TXT.
- TTL — how many seconds resolvers may cache this answer. Check it before concluding that propagation has failed.
Common questions
Which resolver does this tool query?
Your browser sends the query to Google's public DNS-over-HTTPS resolver at dns.google. The answers reflect that resolver's cache, so immediately after a change they can differ from what your corporate or ISP resolver returns.
Why do I still see the old IP after changing a record?
Resolvers are allowed to cache an answer for the length of its TTL. Check the TTL column: until it expires, some resolvers will keep serving the previous value. Lower the TTL a day or two before a planned cutover so the switch takes effect quickly.
Why does my reverse (PTR) lookup return nothing?
PTR records live in the in-addr.arpa zone, which is controlled by whoever owns the IP block — usually your ISP or cloud provider, not you. If they have not published a PTR record for that address, there is nothing to return.