Class A IP address.
Assuming that this is a Class A network (Class A Networks range from 1-127) the default subnet masked is 255.0.0.0. Therefore the network ID would be 110.0.0.0 and the host ID would be x.10.10.1
Since this is a class C network address, the host id is 24, the network id is 201.123.87.0
The first octet determines what class of network you are located on. From that, you can determine how many of the octets represent the network address, and which part represents the client or host portion. IP addresses in version 4 (iPv4) are divided into two segments: the network id and the host id. Knowing the range of network class addresses will help: Class A is 0 - 126 and uses only the first octet for the network portion Class B is 128 - 191 and uses the first two octets for the network id Class C is 192 - 223 and uses the first three octets for the network id An example would be: 192.168.1.5 is a class C address, so we use the first three octets for the network id. This gives a network id of 192.168.1.0 and a host id of 5 in that network.
Class C network
class A
Network IDA network ID refers to a part of a TCP/IP address that is used to identify the subnet that a host may be on. The subnet that the computer is on is determined by the netmask and IP address of the computer. This subnet address is the same as the network ID and is the beginning part of the computers IP address.When the netmask is setup, it is a number where some of the most significant bits have a 1's value and the rest have values of 0. The most significant part of the netmask with bits set to 1's specifies the network address, and the lower part of the address will specify the host address.The part of the IP address that matches the part of the netmask where the bits are set to ones determines the network ID.
66.210.198.80 (address range 66.210.198.81-95)
A network with an IP address 192.168.1.1 is a class C IPv4 network address in the network 192.168.1.0 with a subnet mask 255.255.255.0, capable of supporting 253 hosts.
the address Class
To find the Network ID and Host ID from an IP address you need to use a Subnet Mask. The address 220.43.6.8 is a class C IP address (Since the range of Class C address is 192.0.0.0 to 223.255.255.255).The standard default mask for class C is 255.255.255.0Network address = (IP address) Boolean AND (Subnet mask)Hence,network address = 220.43.6.8 AND 255.255.255.0 = 220.43.6(since 255 means all 1s in binary, hence it'll give the same bits which are ANDed with it, whereas 0 means all 0s in binary, hence it'll give answer as 0 irrespective of what bits are ANDed with it)Hence Host Address would be the remaining part of IP address = 8
Assuming that the IP address is a classfull IP, we know that it is a Class B address because a Class B IP address ranges from 128 - 191. In a class B address the default subnet mask is 255.255.0 (or /16). Therefore the net ID would be 137.56.0.0 and the Host ID would be x.x.8.6. "x" meaning the network ID.