DNS test
Resolve and validate every DNS record for a domain.
In short
A DNS test resolves the public records for a domain — A, AAAA, CNAME, MX, NS, TXT, CAA and SOA — and flags records that are missing, inconsistent between nameservers, or misconfigured in a way that breaks email delivery or crawling.
What the DNS test checks
- Authoritative nameservers respond and agree with each other.
- A and AAAA records point to reachable hosts.
- MX records exist, are ordered by priority, and resolve.
- SPF, DKIM and DMARC TXT records are present and syntactically valid.
- CAA records restrict which authorities may issue certificates.
- TTL values are sane for the record type.
How to read your results
- A missing AAAA record is not an error, but it does mean IPv6-only clients depend on your provider's fallback.
- Two nameservers returning different answers for the same record is a propagation or split-horizon problem and should be fixed before you change anything else.
- A DMARC policy of p=none collects reports without enforcing anything — useful while rolling out, risky as a permanent state.
Limitations of this tool
- Results reflect what our resolvers see; local caches and geo-routed DNS can differ.
- Records changed within the last TTL window may still show the previous value.
Frequently asked questions
- How long do DNS changes take to appear?
- Up to the TTL of the record you changed, plus the caching behaviour of intermediate resolvers. A 300 second TTL usually propagates within minutes; 86400 can take a full day.
- Does DNS affect SEO?
- Indirectly but materially. Slow or intermittent resolution increases time to first byte and can cause crawl errors, and a broken mail configuration undermines the verification emails many search tools rely on.
- Why do I need to sign up to see full DNS results?
- The summary is free. Full record tables, mail-security scoring and history are tied to an account so we can rate limit lookups and keep your saved domains together.
Category: SEO · Last updated 2026-08-08