SEO Tool

DNS Lookup

Проверка DNS записей: A, AAAA, MX, TXT, CNAME, NS

Disclaimer: DNS records are public information. Data is provided "as is" for diagnostic purposes. Use for lawful purposes only.

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DNS records: checking and diagnostics

Why check DNS

DNS translates a domain name into an IP address and manages the domain’s email. Errors in the records lead to site unavailability, lost email and problems verifying the domain in services.

The tool shows all the main record types: A, AAAA, MX, NS, CNAME, TXT — and helps quickly diagnose problems after a move or a change of hosting.

Typical scenarios

The site has moved but the old version opens — check the A record and TTL. Email goes to spam — check SPF, DKIM and DMARC in the TXT records. The domain is not verified in a service — make sure the TXT record has been published.

Keep the DNS zone tidy: remove records from disabled services, as they can become a subdomain-takeover attack vector.

Frequently asked questions

Which DNS records are the most important?+

A/AAAA point to the site’s IP address, MX to the mail servers, NS to the zone’s DNS servers, CNAME are aliases, TXT are service records including SPF, DKIM and DMARC for email protection.

What are SPF, DKIM and DMARC?+

These are TXT records for email protection: SPF lists the servers allowed to send mail from your domain, DKIM signs messages cryptographically, DMARC sets the policy for messages that fail the check. Without them, messages end up in spam.

How long do DNS records take to update?+

From minutes to 48 hours — it depends on the record’s TTL and caching at providers. Before moving a site, lower the TTL to 300–600 seconds in advance.

Does DNS affect site speed?+

Yes, DNS resolution is the first step of loading a page. Slow NS servers add tens of milliseconds to every first visit. Use fast DNS hosts with an anycast network.