nslookup or a dedicated DNS tool.DNS Lookup
The DNS Lookup tool retrieves the DNS records - A, AAAA, MX, NS, CNAME, and TXT - for any domain, so you can inspect how it is configured.
What DNS records reveal
- A / AAAA - the IPv4 and IPv6 addresses the domain points to.
- MX - the mail servers that handle the domain's email.
- NS - the authoritative name servers.
- CNAME - aliases pointing one name to another.
- TXT - verification and policy records like SPF and DKIM.
Who uses it
Developers and admins use DNS lookups to verify that a domain points to the right server, troubleshoot email delivery, confirm a new record has propagated, or check SPF/DKIM for deliverability. For registration details rather than records, use the Whois Lookup.
Frequently Asked Questions
What is a DNS record?
A DNS record maps a domain to information such as an IP address (A/AAAA), mail server (MX), or verification text (TXT).
What is an MX record for?
MX records specify which mail servers receive email for a domain, so they are key for email delivery and troubleshooting.
Why check TXT records?
TXT records hold SPF, DKIM, and domain verification values that affect email deliverability and service ownership checks.
How is DNS Lookup different from Whois?
DNS Lookup shows how a domain is configured (records); Whois shows who registered it and when it expires.
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