spf record lookup
To view the SPF or Sender ID record for a domain, enter the domain name below and hit the submit button.

reverse dns lookup
To look up the host name associated with an IP address, enter the IP address below and hit the submit button.

spamhaus domain lookup
Enter a hostname or domain name to look up relevant A records and NS records, and check those records against the Spamhaus Block List (SBL). Note: This lookup is NOT for IP addresses.

other dns lookup
To look up a DNS record, enter the type of DNS record you wish to query for, then enter the domain name, IP address, or host name you'd like to look up information about, and hit the submit button.