Online IP Subnet Calculator

The IP Subnet Calculator performs subnet network calculations using IP address, subnet mask, or subnet bits. While subnet masks are often represented in dot-decimal form, their use becomes clearer in binary.

Subnet masks consist of 32 bits, a block of 1s followed by a block of 0s. The 1s designate that part of the address as being part of the network portion and the 0s designate that part as being part of the host address. Subnet masks can also be expressed in a shorter form, known as Classless Inter-Domain Routing (CIDR) notation, which gives the network number followed by a slash / and the number of 1 bits in the binary notation of the netmask (i.e. the number of relevant bits in the network number).

IP Subnet Calculator

IP Subnet Calculator
IP-Address		Reset »
Subnet Mask
Subnet Bits

Result

Item	Dot-Decimal	Hex	Binary
IP-Address	38.107.191.99	266BBF63	00100110-01101011-10111111-01100011
Subnet Mask	255.255.255.0	FFFFFF00	11111111-11111111-11111111-00000000
Subnet ID (Network)	38.107.191.0	266BBF00	00100110-01101011-10111111-00000000
Broadcast Address	38.107.191.255	266BBFFF	00100110-01101011-10111111-11111111

IP Subnet Calculator Features

The Online IP Subnet Calculator enables subnet network calculations using, IP address, subnet mask, subnet bits, mask bits (Classless Inter-Domain Routing (CIDR
Results presented in dot-decimal, hexadecimal and binary format