|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
 |
|
|
|
|
Mailing List
|
|
By Joining the mailing list you will be notified of site updates.
|
|
_______________
Show Your Support For
This Site By Donating:
_______________
|
|
|
Server Time:
3:01 AM
This Server Runs:
Red Hat Enterprise Linux 4
Kernel 2.6.9-42.0.2.EL #1
Apache 1.3.36 (Unix)
PHP 4.4.2
Perl 5.8.5
cPanel 10.8.2-STABLE 120
|
_______________
|
|
|
|
|
|
Questions? Call Our Office Today 941-306-3031
|
Audience: System Admins - Experts
Last Updated: 5/4/2005 5:23:29 PM
Original Creation Date: 5/4/2005 5:23:29 PM
**All times are EST**
|
|
Subnet Cheat Sheet
By Erik Rodriguez
The tables below are commonly used subnet masks and hosts.
|
|
Class C
|
|
|
| Mask
|
Notation | Subnets | Hosts | | 255.255.255.0 | /24 | 1 | 256 | | 255.255.255.128 | /25 | 2 | 128 | | 255.255.255.192 | /26 | 4 | 64 | | 255.255.255.224 | /27 | 8 | 32 | | 255.255.255.240 | /28 | 16 | 16 | | 255.255.255.248 | /29 | 32 | 8 | | 255.255.255.252 | /30 | 64 | 4 | | 255.255.255.254 | /31 | 128 | 2 | | 255.255.255.255 | /32 | 256 | 1 | |
Class B | | | Mask | Notation | Subnets | Hosts | | 255.255.0.0 | /16 | 2 | 65,536 | | 255.255.128.0 | /17 | 2 | 32,768 | | 255.255.192.0 | /18 | 4 | 16,384 | | 255.255.224.0 | /19 | 8 | 8,192 | | 255.255.240.0 | /20 | 16 | 4,096 | | 255.255.248.0 | /21 | 32 | 2,048 | | 255.255.252.0 | /22 | 64 | 1,024 | | 255.255.254.0 | /23 | 128 | 512 | | 255.255.255.0 | /24 | 256 | 256 | | Class A | | | Mask | Notation | Subnets | Hosts | | 255.0.0.0 | /8 | 1 | 16,777,216 | | 255.128.0.0 | /9 | 2 | 8,388,608 | | 255.192.0.0 | /10 | 4 | 4,194,304 | | 255.224.0.0 | /11 | 8 | 2,097,152 | | 255.240.0.0 | /12 | 16 | 1,048,576 | | 255.248.0.0 | /13 | 32 | 524,288 | | 255.252.0.0 | /14 | 64 | 262,144 | | 255.254.0.0 | /15 | 128 | 131,072 | | 255.255.0.0 | /16 | 256 | 65,536 | | | | |
