Check any domain's DNS, propagation, email & SSL in one lookup.

What one lookup covers

Type a domain above and Valla DNS queries live sources in parallel: DNS records (A, AAAA, MX, TXT, NS, CNAME), propagation across public resolvers around the world, WHOIS/RDAP registration data, email authentication (SPF, DKIM, DMARC), and the SSL certificate the server presents on port 443. Nothing comes from a stale crawl. Every answer is fetched the moment you run the check.

How to read the results

Start with A and AAAA. Those records decide where browsers connect, so a wrong or missing address explains most "site is down" reports. MX rows list the servers that accept mail for the domain, in priority order (lower number wins). TXT records carry SPF policies and verification strings. The WHOIS panel confirms which registrar holds the domain and when it expires. The SSL panel shows the certificate issuer, its expiry date, and the hostnames it covers.

When resolvers disagree with each other, a recent change is usually still spreading. Each DNS answer carries a TTL (time to live) in seconds, and resolvers keep serving their cached copy until that timer runs out. A record with a 3600-second TTL can lag up to an hour after you change it, and some resolvers stretch that further.

Common questions

Do I need an account? No. Every tool here is free and runs without signup.

Can I check a domain I don't own? Yes. DNS, WHOIS, and certificate data are public by design, which is what makes them useful for verifying a vendor, a migration, or a suspicious link.

Where should I start when a site stops working? Run the DNS lookup first and confirm the A record points where you expect. Then check propagation, and only then dig into SSL or email. The guide Domain not working? Quick DNS lookup steps walks through that order with examples.