IP Calculator

IP Calculator - takes an IP address and netmask and calculates the resulting broadcast, network, Cisco wildcard mask, and host range.
Example request: IP-address & CIDR Netmask:  10.0.0.1/22 or IP & Netmask: 10.0.0.1 255.255.252.0 or IP & Wildcard Mask: 10.0.0.1 0.0.3.255
Address:192.168.0.111000000.10101000.00000000.   00000001
Netmask:255.255.255.0 = 2411111111.11111111.11111111.   00000000
Wildcard:0.0.0.25500000000.00000000.00000000.   11111111
Network:192.168.0.011000000.10101000.00000000.   00000000Class C
Broadcast:192.168.0.25511000000.10101000.00000000.   11111111
HostMin:192.168.0.111000000.10101000.00000000.   00000001
HostMax:192.168.0.25411000000.10101000.00000000.   11111110
Hosts/Net:254( RFC-1918 Private Internet Address. )
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Information IP address
An IP address has two components, the network address and the host address. A subnet mask separates the IP address into the network and host addresses (). Subnetting further divides the host part of an IP address into a subnet and host address () if additional subnetwork is needed. Use the Subnet Calculator to retrieve subnetwork information from IP address and Subnet Mask. It is called a subnet mask because it is used to identify network address of an IP address by perfoming a bitwise AND operation on the netmask.

A Subnet mask is a 32-bit number that masks an IP address, and divides the IP address into network address and host address. Subnet Mask is made by setting network bits to all "1"s and setting host bits to all "0"s. Within a given network, two host addresses are reserved for special purpose, and cannot be assigned to hosts. The "0" address is assigned a network address and "255" is assigned to a broadcast address, and they cannot be assigned to hosts.

Examples of commonly used netmasks for classed networks are 8-bits (Class A), 16-bits (Class B) and 24-bits (Class C), and classless networks are as follows

Class Address # of Hosts Netmask (Binary) Netmask (Decimal)
CIDR /4 240,435,456 11110000 00000000 00000000 00000000 240.0.0.0
CIDR /5 134,217,728 11111000 00000000 00000000 00000000 248.0.0.0
CIDR /6 67,108,864 11111100 00000000 00000000 00000000 252.0.0.0
CIDR /7 33,554,432 11111110 00000000 00000000 00000000 254.0.0.0
A /8 16,777,216 11111111 00000000 00000000 00000000 255.0.0.0
CIDR /9 8,388,608 11111111 10000000 00000000 00000000 255.128.0.0
CIDR /10 4,194,304 11111111 11000000 00000000 00000000 255.192.0.0
CIDR /11 2,097,152 11111111 11100000 00000000 00000000 255.224.0.0
CIDR /12 1,048,576 11111111 11110000 00000000 00000000 255.240.0.0
CIDR /13 524,288 11111111 11111000 00000000 00000000 255.248.0.0
CIDR /14 262,144 11111111 11111100 00000000 00000000 255.252.0.0
CIDR /15 131,072 11111111 11111110 00000000 00000000 255.254.0.0
B /16 65,534 11111111 11111111 00000000 00000000 255.255.0.0
CIDR /17 32,768 11111111 11111111 10000000 00000000 255.255.128.0
CIDR /18 16,384 11111111 11111111 11000000 00000000 255.255.192.0
CIDR /19 8,192 11111111 11111111 11100000 00000000 255.255.224.0
CIDR /20 4,096 11111111 11111111 11110000 00000000 255.255.240.0
CIDR /21 2,048 11111111 11111111 11111000 00000000 255.255.248.0
CIDR /22 1,024 11111111 11111111 11111100 00000000 255.255.252.0
CIDR /23 512 11111111 11111111 11111110 00000000 255.255.254.0
C /24 256 11111111 11111111 11111111 00000000 255.255.255.0
CIDR /25 128 11111111 11111111 11111111 10000000 255.255.255.128
CIDR /26 64 11111111 11111111 11111111 11000000 255.255.255.192
CIDR /27 32 11111111 11111111 11111111 11100000 255.255.255.224
CIDR /28 16 11111111 11111111 11111111 11110000 255.255.255.240
CIDR /29 8 11111111 11111111 11111111 11111000 255.255.255.248
CIDR /30 4 11111111 11111111 11111111 11111100 255.255.255.252