WhoDNS

DNS & Email Check

DNS records, server availability, email security (SPF/DKIM/DMARC).

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Frequently Asked Questions

What is DNS?
DNS is like the internet's phone book; it translates a domain name (like example.com) into the IP address of the server hosting the site so your browser knows where to connect.
What is the difference between A, MX, TXT and CNAME records?
An A record points the domain to an IP, MX defines the mail-receiving server, TXT holds verifications and SPF/DKIM, and CNAME aliases one name to another.
What role do SPF, DKIM and DMARC play in this check?
These three records make your domain's email trustworthy and spoof-resistant. The tool checks their presence and correctness alongside the DNS records.
What does TTL mean in DNS records?
TTL is how long (in seconds) a record is cached by resolvers. A lower TTL means changes propagate faster but adds more load on DNS.