Domain & DNS Tools

IP Address Lookup Find out who operates an IP address. Enter an IPv4 or IPv6 address, or a host… IP Range Calculator Work out everything about an IPv4 network in one step. Type a network in CIDR… IPv4 to IPv6 Converter Write an IPv4 address in IPv6 form. The converter shows the IPv4-mapped address… IPv6 Address Calculator Make sense of any IPv6 address or prefix. Enter an address with its prefix length… DNS Lookup See what the Domain Name System currently says about a domain. Choose the record… MX Record Checker Find out where a domain receives its email. The checker lists every mail server in… SPF Record Checker Verify that a domain's SPF record is valid and does what you intend. The checker… DKIM Record Checker Inspect the public key a domain publishes for signing its email. Enter the domain… DMARC Checker See whether a domain is protected against email spoofing. The checker fetches the… WHOIS Lookup Get the registration record of any domain straight from its registry: registrar… Domain Availability Checker See whether the domain you have in mind can still be registered. Each name is… Domain Age Checker Find out how long a domain has been registered. The checker asks the registry for… Domain Authority Checker Look up how strong a domain is. Authority scores are displayed when a score… Domain Expiry Checker Find out when a domain's registration ends. Enter one domain or a list of up to… Website DNS Checker Test whether a domain's DNS is set up soundly. Instead of listing raw records…