DNS Lookup Online lets you query the most common DNS record types for any domain and see results per resolver. Use it to confirm A and AAAA addresses, verify MX routing, validate TXT values for SPF/DMARC/DKIM, and check delegation with NS and SOA. The per‑resolver view is useful when diagnosing propagation, caching issues, or inconsistent answers across public DNS providers.
Enter a domain, choose a record type, and run the lookup. You can compare answers quickly, spot missing records, and validate changes without digging into multiple tools. It is equally useful for troubleshooting outages and for routine checks during migrations or onboarding new services.
If you want a guided check, use the focused workflows below. They combine multiple record types and present results in a single view.
DNS translates domain names into IP addresses. It is the first step in connecting to a website or service, so wrong records or stale caches can cause outages or delivery failures.
An A record maps a hostname to an IPv4 address. It is the most common record used for websites and APIs.
An AAAA record maps a hostname to an IPv6 address. It enables IPv6 connectivity and is often used alongside A records.
MX records define which mail servers accept email for a domain. They include priorities that control failover order.
Resolvers cache DNS answers based on TTL. If a change is recent, some caches will still return old data. Comparing resolvers helps track propagation.
Propagation is the time it takes for DNS changes to spread across caches and resolvers. Lower TTLs can help updates appear sooner.
They are email authentication records published in DNS. SPF authorizes senders, DKIM signs mail, and DMARC defines policy and reporting.
Start with the exact hostname, check the record type, compare multiple resolvers, and verify authoritative name servers if results conflict.
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