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Tutorials

Free Class C Subnetting Tutorial, IP Address Subnetting, How to subnet Class C network

External Resources

This lesson is only a part of a series of IPv4 subnetting lessons. Please visit the below links to learn IPv4 subnetting completely.

• Class C Subnetting Tutorial - Part 1
• Class C Subnetting Tutorial - Part 2
• Class B Subnetting Tutorial - Part 1
• Class B Subnetting Tutorial - Part 2
• Class A Subnetting Tutorial - Part 1
• Class A Subnetting Tutorial - Part 2
• Variable Length Subnet Masking (VLSM)
• Supernetting

Class C - 4 Bit Subnetting

If we include four bits from the host part to the network part, the subnet mask is changed to 255.255.255.240.

11000000.10101000.00001010.0000 | 0000
11111111.11111111.11111111.1111 | 0000

The four bits added to network part can have sixteen possible values in last (fourth) octet and that are 0000, 0001, 0010, 0011, 0100, 0101, 0110, 0111, 1000, 1001, 1010, 1011, 1100, 1101, 1110, 1111.

SN No Description Binaries Decimal
1 Network Address 11000000.10101000.00001010.00000000 192.168.10.0
First IPv4 address 11000000.10101000.00001010.00000001 192.168.10.1
Last IPv4 address 11000000.10101000.00001010.00001110 192.168.10.14
Broadcast Address 11000000.10101000.00001010.00001111 192.168.10.15
2 Network Address 11000000.10101000.00001010.00010000 192.168.10.16
First IPv4 address 11000000.10101000.00001010.00010001 192.168.10.17
Last IPv4 address 11000000.10101000.00001010.00011110 192.168.10.30
Broadcast Address 11000000.10101000.00001010.00011111 192.168.10.31
3 Network Address 11000000.10101000.00001010.00100000 192.168.10.32
First IPv4 address 11000000.10101000.00001010.00100001 192.168.10.33
Last IPv4 address 11000000.10101000.00001010.00101110 192.168.10.46
Broadcast Address 11000000.10101000.00001010.00101111 192.168.10.47
4 Network Address 11000000.10101000.00001010.00110000 192.168.10.48
First IPv4 address 11000000.10101000.00001010.00110001 192.168.10.49
Last IPv4 address 11000000.10101000.00001010.00111110 192.168.10.62
Broadcast Address 11000000.10101000.00001010.00111111 192.168.10.63
5 Network Address 11000000.10101000.00001010.01000000 192.168.10.64
First IPv4 address 11000000.10101000.00001010.01000001 192.168.10.65
Last IPv4 address 11000000.10101000.00001010.01001110 192.168.10.78
Broadcast Address 11000000.10101000.00001010.01001111 192.168.10.79
6 Network Address 11000000.10101000.00001010.01010000 192.168.10.80
First IPv4 address 11000000.10101000.00001010.01010001 192.168.10.81
Last IPv4 address 11000000.10101000.00001010.01011110 192.168.10.94
Broadcast Address 11000000.10101000.00001010.01011111 192.168.10.95
7 Network Address 11000000.10101000.00001010.01100000 192.168.10.96
First IPv4 address 11000000.10101000.00001010.01100001 192.168.10.97
Last IPv4 address 11000000.10101000.00001010.01101110 192.168.10.110
Broadcast Address 11000000.10101000.00001010.01101111 192.168.10.111
8 Network Address 11000000.10101000.00001010.01110000 192.168.10.112
First IPv4 address 11000000.10101000.00001010.01110001 192.168.10.113
Last IPv4 address 11000000.10101000.00001010.01111110 192.168.10.126
Broadcast Address 11000000.10101000.00001010.01111111 192.168.10.127
9 Network Address 11000000.10101000.00001010.10000000 192.168.10.128
First IPv4 address 11000000.10101000.00001010.10000001 192.168.10.129
Last IPv4 address 11000000.10101000.00001010.10001110 192.168.10.142
Broadcast Address 11000000.10101000.00001010.10001111 192.168.10.143
10 Network Address 11000000.10101000.00001010.10010000 192.168.10.144
First IPv4 address 11000000.10101000.00001010.10010001 192.168.10.145
Last IPv4 address 11000000.10101000.00001010.10011110 192.168.10.158
Broadcast Address 11000000.10101000.00001010.10011111 192.168.10.159
11 Network Address 11000000.10101000.00001010.10100000 192.168.10.160
First IPv4 address 11000000.10101000.00001010.10100001 192.168.10.161
Last IPv4 address 11000000.10101000.00001010.10101110 192.168.10.174
Broadcast Address 11000000.10101000.00001010.10101111 192.168.10.175
12 Network Address 11000000.10101000.00001010.10110000 192.168.10.176
First IPv4 address 11000000.10101000.00001010.10110001 192.168.10.177
Last IPv4 address 11000000.10101000.00001010.10111110 192.168.10.190
Broadcast Address 11000000.10101000.00001010.10111111 192.168.10.191
13 Network Address 11000000.10101000.00001010.11000000 192.168.10.192
First IPv4 address 11000000.10101000.00001010.11000001 192.168.10.193
Last IPv4 address 11000000.10101000.00001010.11001110 192.168.10.206
Broadcast Address 11000000.10101000.00001010.11001111 192.168.10.207
14 Network Address 11000000.10101000.00001010.11010000 192.168.10.208
First IPv4 address 11000000.10101000.00001010.11010001 192.168.10.209
Last IPv4 address 11000000.10101000.00001010.11011110 192.168.10.222
Broadcast Address 11000000.10101000.00001010.11011111 192.168.10.223
15 Network Address 11000000.10101000.00001010.11100000 192.168.10.224
First IPv4 address 11000000.10101000.00001010.11100001 192.168.10.225
Last IPv4 address 11000000.10101000.00001010.11101110 192.168.10.238
Broadcast Address 11000000.10101000.00001010.11101111 192.168.10.239
16 Network Address 11000000.10101000.00001010.11110000 192.168.10.240
First IPv4 address 11000000.10101000.00001010.11110001 192.168.10.241
Last IPv4 address 11000000.10101000.00001010.11111110 192.168.10.254
Broadcast Address 11000000.10101000.00001010.11111111 192.168.10.255

The network 192.168.10.0 is divided into sixteen networks, each network has 16 total IPv4 addresses and 14 usable IPv4 addresses (two IPv4 addresses are used in each subnet to represent the network address and the directed broadcast address).

From the above examples, you can can clearly understand how to subnet a Class C network .

Class C Subnetting can be summerized as below.

Subnet Bits Subnet Mask CIDR Total Subnets Usable IPs/Subnet
0 255.255.255.0 /24 1 254
1 255.255.255.128 /25 2 126
2 255.255.255.192 /26 4 62
3 255.255.255.224 /27 8 30
4 255.255.255.240 /28 16 14
5 255.255.255.248 /29 32 6
6 255.255.255.252 /30 64 2

In this Class C Subnetting Tutorial - Part 2, you have learned how to perform a Class C 4 bit subnetting. To View Class B Subnetting Tutorial - Part 1, Click "Next".

              Jajish Thomason Google+
Related Topics
IPv4 addresses Class C Subnetting Tutorial - Part 1 Class B Subnetting Tutorial - Part 1 Class B Subnetting Tutorial - Part 2 Class A Subnetting Tutorial - Part 1 Class A Subnetting Tutorial - Part 2 Variable Length Subnet Masking (VLSM) Supernetting
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