xnnd tools for dns
mail exchange lookup
To look up what server hosts inbound email for a given domain, enter the domain name below and hit the submit button.

quick whois
Enter the domain you'd like to lookup in whois, and hit the submit button. (Note, the actual whois lookup is not performed by XNND.com.)

cidr range converter
Enter a netblock specified in CIDR notation (192.168.0.0/24) or a range of IP addresses (192.168.0.0-192.168.0.255) to convert between the two.

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.

Type Host name, domain, or IP address  

snds ip converter
Enter an IP address to convert it to decimal format, and provide a direct link to the SNDS lookup page for that IP address.

IP address  

Your IP address: 54.90.153.141 [ Look up 54.90.153.141 in ARIN ] wttw - xnnd.com

 

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