Sitecheck Beta v1.0

Free DNS Lookup & Domain Checker

Inspect DNS records, spot misconfigurations, and verify email deliverability in seconds. This tool is completely free and doesn't require an account.

We rate-limit lookups to prevent abuse.

Why your DNS records matter

DNS is the address book of the internet. A misconfiguration can break email delivery, slow down your website, or leave your infrastructure vulnerable. Use this DNS checker to verify that the essentials are configured correctly.

  • Email deliverability

    Ensure MX and TXT records (SPF, DKIM) are in place so your messages land in the inbox.

  • Security posture

    Spot spoofing vulnerabilities and confirm your domain points to the right providers.

  • Performance & redundancy

    Check that CDN, load balancers, and backup name servers are configured correctly.

DNS best practices checklist

  • Keep at least two authoritative name servers online.
  • Configure SPF, DKIM, and DMARC TXT records for trusted email.
  • Set low TTL values while testing changes, then raise them for stability.
  • Document third-party providers (CDN, email, SaaS) tied to your DNS.
  • Monitor for unexpected records to catch hijacks early.

Frequently asked questions

Which DNS record types do you check?

We fetch A, AAAA, CNAME, MX, NS, TXT, SOA, SRV, CAA, and DMARC records. If a record type is missing we highlight it so you can take action.

How reliable are the results?

We query using modern DNS resolvers directly from our infrastructure. Results are cached briefly to keep the tool fast and prevent abuse.

Do I need an account?

Nope. The DNS checker is free to use without logging in. If you want automated reports and historical tracking you can upgrade to a Sitecheck account later.