IP address 138.12.4.23
IP address: 138.12.4.23
Address type: IPv4
Host or reverse DNS (rDNS): marquiswhoswho.com
Country: 
United States
138.12.4.23 does NOT belong to a private IP address block.
138.12.4.23 does NOT belong to a reserved IP address block.
There are different formats or notations how the IP address 138.12.4.23 can be represented.
Dotted decimal: 138.12.4.23
Hexadecimal: 0x8A0C0417
Dotted hex: 0x8A.0x0C.0x04.0x17
Decimal: 2316043287
Octal: 0212.0014.0004.0027
Binary: 10001010.00001100.00000100.00010111