DNS Record Checker
Look up all DNS records for any domain — A, AAAA, CNAME, MX, TXT, NS, SOA, and CAA records. Check email authentication (SPF, DMARC) and identify DNS configuration issues.
Why Check DNS Records?
Email Deliverability
Missing or misconfigured MX, SPF, and DMARC records cause email to go to spam. Check your DNS to ensure email authentication is set up correctly.
Website Performance
DNS configuration affects how fast your site loads. Check A/CNAME records, TTL values, and CDN routing to optimize performance.
Security
CAA records control which certificate authorities can issue SSL certificates. SPF and DMARC prevent email spoofing and phishing attacks.
SEO Impact
DNS misconfigurations can cause downtime, which hurts search rankings. Ensure proper CNAME/A records and avoid DNS-related outages.
DNS Record Types Explained
Maps domain to an IPv4 address (e.g., 93.184.216.34)
Maps domain to an IPv6 address for modern internet support
Alias that points one domain to another domain name
Mail Exchange — specifies which servers handle email
Text records — used for SPF, DMARC, domain verification
Nameserver records — defines authoritative DNS servers
Start of Authority — zone administration info and serial
Certificate Authority Authorization — controls SSL issuance
Frequently Asked Questions
What are DNS records?
DNS (Domain Name System) records are instructions that tell the internet how to handle requests for a domain. They map domain names to IP addresses (A/AAAA records), specify email servers (MX records), verify domain ownership (TXT records), and more. They're the backbone of how the internet routes traffic.
What is SPF and why is it important?
SPF (Sender Policy Framework) is a DNS TXT record that lists which servers are authorized to send email on behalf of your domain. Without SPF, anyone can spoof emails from your domain. Most email providers (Gmail, Outlook) check SPF to filter spam and phishing.
What is DMARC?
DMARC (Domain-based Message Authentication, Reporting, and Conformance) is a DNS TXT record at _dmarc.yourdomain.com. It tells receiving mail servers what to do if SPF or DKIM checks fail (none, quarantine, or reject). DMARC prevents email spoofing and phishing.
How do DNS records affect website speed?
DNS resolution is the first step when a browser loads your website. Low TTL values cause frequent lookups (slower), while high TTL values cache longer (faster but slower to propagate changes). Multiple A records or CNAME to a CDN can improve global performance.