DNS & Domain Tools
Tools for inspecting DNS records, domains and mail servers. These are the only tools here that run from our servers, because a browser cannot make DNS queries.
MX Lookup
Find out which servers accept mail for a domain, and in what order.
DNS Lookup
See exactly which IP address a domain points to right now.
AAAA Lookup
Check whether your domain is reachable over IPv6.
TXT Lookup
See SPF records, verification codes and everything else stored as text.
CNAME Lookup
Trace where a subdomain actually points.
SOA Lookup
The primary server, serial number and zone timings.
SRV Lookup
Find which server and port handle a particular service.
Reverse Lookup
From address to name: find out what sits behind an IP.
Blacklist Check
Find out whether your mail server or domain is on a list that's blocking your email.
Open Port Checker
Check that a service on your server can be reached from outside your network.
What Is My IP?
The address websites see when you visit them.