Please Whitelist This Site?

I know everyone hates ads. But please understand that I am providing premium content for free that takes hundreds of hours of time to research and write. I don't want to go to a pay-only model like some sites, but when more and more people block ads, I end up working for free. And I have a family to support, just like you. :)

If you like The TCP/IP Guide, please consider the download version. It's priced very economically and you can read all of it in a convenient format without ads.

If you want to use this site for free, I'd be grateful if you could add the site to the whitelist for Adblock. To do so, just open the Adblock menu and select "Disable on tcpipguide.com". Or go to the Tools menu and select "Adblock Plus Preferences...". Then click "Add Filter..." at the bottom, and add this string: "@@||tcpipguide.com^$document". Then just click OK.

Thanks for your understanding!

Sincerely, Charles Kozierok
Author and Publisher, The TCP/IP Guide


NOTE: Using software to mass-download the site degrades the server and is prohibited.
If you want to read The TCP/IP Guide offline, please consider licensing it. Thank you.

The Book is Here... and Now On Sale!

The whole site in one document for easy reference!
The TCP/IP Guide

Custom Search







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

If you find The TCP/IP Guide useful, please consider making a small Paypal donation to help the site, using one of the buttons below. You can also donate a custom amount using the far right button (not less than $1 please, or PayPal gets most/all of your money!) In lieu of a larger donation, you may wish to consider purchasing a download license of The TCP/IP Guide. Thanks for your support!
Donate $2
Donate $5
Donate $10
Donate $20
Donate $30
Donate: $



Home - Table Of Contents - Contact Us

The TCP/IP Guide (http://www.TCPIPGuide.com)
Version 3.0 - Version Date: September 20, 2005

Copyright 2001-2005 Charles M. Kozierok. All Rights Reserved.
Not responsible for any loss resulting from the use of this site.