IP address 81.31.158.21
IP address: 81.31.158.21
Address type: IPv4
Host or reverse DNS (rDNS): web110.shared.host.it
Country: 
Italy
81.31.158.21 does NOT belong to a private IP address block.
81.31.158.21 does NOT belong to a reserved IP address block.
There are different formats or notations how the IP address 81.31.158.21 can be represented.
Dotted decimal: 81.31.158.21
Hexadecimal: 0x511F9E15
Dotted hex: 0x51.0x1F.0x9E.0x15
Decimal: 1361026581
Octal: 0121.0037.0236.0025
Binary: 01010001.00011111.10011110.00010101