Information about network - 91.X.X.X
Information
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
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 |