Global DNS lookup
Query DNS records from public resolver infrastructure to diagnose propagation, mismatch, and resolution problems quickly.
DNS record types explained
A record
Maps a hostname to an IPv4 address and is one of the most common records used for web delivery.
CNAME
Points one hostname to another hostname and is commonly used for www aliases or managed platform hostnames.
MX
Defines which mail servers receive email for the domain.
TXT
Carries arbitrary text and is widely used for verification, SPF, DKIM, and related policies.
AAAA
Maps a hostname to an IPv6 address.
NS
Lists the authoritative name servers that serve the DNS zone.
Common DNS configuration cheatsheet
Google Workspace
Vercel
Netlify
Microsoft 365
DNS error code guide
Domain does not exist
The queried hostname is not present in DNS or was entered incorrectly.
Resolver failure
The resolver could not complete the lookup, often because of upstream authority issues or DNSSEC-related failures.
Request refused
The server declined to answer the request because of resolver policy or recursion limits.
Frequently asked questions
Why am I still seeing the old record after changing DNS?
Propagation takes time. Resolver caches, TTL values, and geography all affect how quickly a new answer appears globally.
What is an SOA record?
The Start of Authority record defines core zone metadata such as the serial number, refresh behavior, and administrative authority for the zone.
What is DNS over HTTPS?
DNS over HTTPS sends DNS lookups through HTTPS instead of traditional plaintext resolver traffic, which improves privacy and can reduce tampering.