Free DNS Lookup Tool

Query all DNS record types, check email security (SPF, DMARC), validate DNSSEC, and detect zone transfer vulnerabilities.

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Frequently Asked Questions

What is a DNS lookup? +
A DNS lookup queries the Domain Name System to retrieve records associated with a domain — A records (IPv4 addresses), AAAA (IPv6), MX (mail servers), TXT (verification and SPF), NS (nameservers), and more. It's essential for troubleshooting connectivity, email delivery, and security configuration.
What DNS records does this tool check? +
This tool checks A, AAAA, MX, TXT, NS, SOA, CNAME, and CAA records. It also validates SPF and DMARC for email security, checks DNSSEC status, and tests for zone transfer vulnerabilities.
Why is DMARC important? +
DMARC (Domain-based Message Authentication) prevents email spoofing by telling receiving servers how to handle emails that fail SPF or DKIM checks. Without DMARC, attackers can send phishing emails that appear to come from your domain.
What is DNSSEC? +
DNSSEC adds cryptographic signatures to DNS records to prevent DNS spoofing and cache poisoning attacks. When enabled, resolvers can verify that DNS responses haven't been tampered with.
Is this DNS lookup tool free? +
Yes. Basic DNS lookups are completely free with no signup required. Pro plans offer unlimited lookups, DNS change monitoring, API access, and historical record tracking.