Free DNS Lookup & Checker
Look up any domain's live DNS records (A, AAAA, MX, NS and TXT) from independent public resolvers.
No signup · answer in about five seconds
What these records do
A / AAAA point your domain at a server's IPv4 / IPv6 address, and 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.
Questions
This check, explained
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.
Want this checked automatically, forever?
VigilDog runs this same check across every client domain, around the clock, and warns you about two weeks before anything breaks.
Your first domain is free forever