The Program Code Uploaded to GitHub

The IP subnet calculator will help you to perform calculation of the below :

1) Wild Card
2) The Network where the ” Enter IP” reside in
3) BroadCast Address
4) Number of Subnet
5) Number of Host
6) First IP address for the ” Enter IP” Network.
7) Last IP Address for the ” Enter IP” Network.

what is Wild Card ?

WildCard is a mask bit used by Network OS to check the below Parameter

1) IP Address available for checking
2) Size of the Network or Subnet
3) IP Address Permitted to access or to access in Firewall ACL ( Access Control List)

How Wild card is being calculated ?

Wild Card is the Inverse Pattern for Subnet Mask

For Example :

Subnet Mask : 255.252.0.0

Wild Card :0.3.255.255

this is calculated by subtracting each single Octet by 255 , the resulted value
will be the Wild Card Value

What is Subnet of a Network?

A Subnet is a product from a larger network being sliced and subdivide into smaller
Network for better management and efficiency.

How Subnet of a Network is being Calculated ?

Example :

Ip Address : 145.67.68.1

Subnet Mask : 255 .255 .254 .0 / 23

IP Address in Binary :    1001 0001 . 0100 0011 . 0100 0100 . 0000 1000
Subnet Mask in Binary : 1111 1111 . 1111 1111 . 1111 1110 . 0000 0000
Network Address : 1001 0001 . 0100 0011 . 0100 0100 . 0000 0000

When you And the Value of the Ip Address and the Subnet Mask you will get the
Network Address.

What is BroadCast Address ?

BroadCast Address is use to transmit data packets throughout the Network Systems

How Broad Cast Address is being Calculated?

Ip Address : 145.67.68.1

Subnet Mask : 255 .255 .254 .0 / 23

Network Address ( this was calculate above ): 145.67.68.0

Broad Cast Address : 1001 0001 . 0100 0011 . 0100 0100 . 0000 0000

+ 11 . 1111 1111

Broad Cast Address : 145.67.69.255

Broad Cast Address is Derive by filling up the last few host bit Address with 1s .

How to Calculate the Number of Subnet ?

Ip Address : 145.67.68.1

Subnet Mask : 255 .255 .254 .0 / 23

Base on the Example above , The Network bit occupied 23 bit

Number of Subnet = 2^ 23

How to Calculate the Number of Host ?

Base on the example on top

Number of Bits occupied by Host = 32 – 23 = 9 bits

Number of Host = 2^ 9 – 2

Why Minus 2 ?

1 Address is reserve for the Network equipment another one is reserve as a broadcast address
so is not usable .

How to Calculate the First Host IP Address ?

First IP Address = Network Address + 1
= 145.67.68.0 + 1
= 145.67.68.1

How to Calculate the Last Host IP Address ?

Last IP Address = Broad Cast Address – 1
= 145.67.69.255 -1
= 145.67.69.254

Check out Dividend Calculator here