IP address 66.231.91.111
IP address: 66.231.91.111
Address type: IPv4
Host or reverse DNS (rDNS): www.exacttarget.com
Country: 
United States
66.231.91.111 does NOT belong to a private IP address block.
66.231.91.111 does NOT belong to a reserved IP address block.
There are different formats or notations how the IP address 66.231.91.111 can be represented.
Dotted decimal: 66.231.91.111
Hexadecimal: 0x42E75B6F
Dotted hex: 0x42.0xE7.0x5B.0x6F
Decimal: 1122458479
Octal: 0102.0347.0133.0157
Binary: 01000010.11100111.01011011.01101111