DNS Lookup — Check DNS Records
Check a domain's DNS records from your browser. Look up A, AAAA, CNAME, MX, TXT, NS, SOA, CAA and SRV records, see TTLs, compare resolvers, and reverse-lookup IP addresses.
Queries go directly from your browser to the resolver you choose using DNS over HTTPS.
How to look up DNS records
- Enter a domain name (like example.com) or an IP address for a reverse lookup.
- Choose a record type, or leave "Common records" to see the main ones at once.
- Click Look up. Try the other resolver to compare, which is useful while DNS changes are propagating.
What each DNS record does
A records map a name to an IPv4 address and AAAA records to IPv6. CNAME makes one name an alias of another. MX records list mail servers with a priority (lower is preferred). TXT records hold text used for domain verification and email security, including SPF and DMARC (look up _dmarc.yourdomain.com). NS records name the authoritative name servers, and SOA holds zone details like the primary server and serial number.
CAA records restrict which certificate authorities may issue TLS certificates for a domain. SRV records locate services such as SIP or XMPP (query names like _sip._tcp.example.com). PTR records provide reverse DNS for an IP address, often checked by mail servers.
TTL is how many seconds resolvers may cache an answer. After you change DNS, old answers can persist until the TTL expires; checking two public resolvers shows whether a change has spread. This tool uses public DNS-over-HTTPS resolvers, so it shows the public view of a domain, not internal or split-horizon DNS.
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Frequently asked questions
How do I check DNS propagation?
Look up the record on both resolvers. If they disagree, caches are still expiring according to the old TTL.
How do I find a domain's mail server?
Look up the MX records. Lower priority numbers are tried first.
How do I check SPF or DMARC?
SPF is a TXT record on the domain itself; DMARC is a TXT record on _dmarc.example.com.
Is my lookup private?
Queries go from your browser to Cloudflare or Google over HTTPS; SnagATool never sees them.