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The TCP/IP Guide

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Table Of Contents  The TCP/IP Guide
 9  TCP/IP Lower-Layer (Interface, Internet and Transport) Protocols (OSI Layers 2, 3 and 4)
      9  TCP/IP Internet Layer (OSI Network Layer) Protocols
           9  Internet Protocol (IP/IPv4, IPng/IPv6) and IP-Related Protocols (IP NAT, IPSec, Mobile IP)
                9  Internet Protocol Version 4 (IP, IPv4)
                     9  IP Addressing
                          9  IP Subnet Addressing ("Subnetting") Concepts

Previous Topic/Section
IP Subnet Identifiers, Subnet Addresses and Host Addresses
Previous Page
Pages in Current Topic/Section
123
4
Next Page
IP Variable Length Subnet Masking (VLSM)
Next Topic/Section

IP Subnetting Summary Tables For Class A, Class B and Class C Networks
(Page 4 of 4)

Class C


Table 54: Subnetting Summary Table For Class C Networks

# of Subnet ID Bit

# of Host ID Bits

# of Subnets Per Network

# of
Hosts Per Subnet

Subnet Mask

(Binary / Dotted Decimal)

Subnet Mask (Slash/ CIDR Notation)

Subnet Address #N Formula (N=0, 1, … # of Subnets-1)

0 (Default)

8

1

254

11111111.11111111.11111111.00000000

255.255.255.0

/24

1

7

2

126

11111111.11111111.11111111.10000000

255.255.255.128

/25

x.y.z.N*128

2

6

4

62

11111111.11111111.11111111.11000000

255.255.255.192

/26

x.y.z.N*64

3

5

8

30

11111111.11111111.11111111.11100000

255.255.255.224

/27

x.y.z.N*32

4

4

16

14

11111111.11111111.11111111.11110000

255.255.255.240

/28

x.y.z.N*16

5

3

32

6

11111111.11111111.11111111.11111000

255.255.255.248

/29

x.y.z.N*8

6

2

64

2

11111111.11111111.11111111.11111100

255.255.255.252

/30

x.y.z.N*4


Previous Topic/Section
IP Subnet Identifiers, Subnet Addresses and Host Addresses
Previous Page
Pages in Current Topic/Section
123
4
Next Page
IP Variable Length Subnet Masking (VLSM)
Next Topic/Section

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