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Free DNS Lookup & Checker
Look up any domain's live DNS records — A, AAAA, MX, NS and TXT — from independent public resolvers.
What these records do
A / AAAA point your domain at a server's IPv4 / IPv6 address — if these are wrong or missing, the site won't load. MX routes your email; a missing or changed MX silently breaks mail delivery. NS are your authoritative nameservers — if they change unexpectedly, someone may have moved your DNS. TXT holds SPF, DKIM, domain-verification and more. A single quiet edit to any of these can take a client offline without warning — which is exactly what VigilDog watches for.
Frequently asked
- What DNS records should every domain have?
- At minimum an A (or AAAA) record so the site resolves, MX records if it handles email, and correct NS records. Missing or wrong records are a common silent outage.
- Why do my DNS changes take time to appear?
- Resolvers cache records for the TTL you set. This tool queries independent public resolvers so you see what the world sees, not your local cache.
- Can VigilDog alert me when DNS changes?
- Yes — it snapshots your records and alerts you the moment one drifts, which often signals a hijack, a mistaken edit, or a migration gone wrong.
Stop checking by hand.
VigilDog watches this across every client domain, 24/7, and warns you days before anything breaks.
Free for your first domain · No card