|
Class:
|
A
|
B
|
C
|
|
Range
|
0-127
|
128-191
|
192-223
|
|
N/H
|
N.H.H.H
|
N.N.H.H
|
N.N.N.H
|
|
Network Bits
|
Nx8 = 8
|
Nx8 = 16
|
Nx8 = 24
|
|
Host Bits
|
Hx8 = 24
|
Hx8 = 16
|
Hx8 = 8
|
|
# Addresses
|
16,777,210
|
66,536
|
256
|
|
Private Range
|
10.0.0.0 - 10.255.255.255
|
172.16.0.0 - 172.31.255.255
|
192.168.0.0 - 192.168.255.255
|
|
Subnet Mask
|
255.0.0.0
|
255.255.0.0
|
255.255.255.0
|
|
CLASS
|
RANGE
|
NOTE
|
|
D
|
224 - 239
|
reserved for multicasting
|
|
E
|
240 - 255
|
reserved for research & development
|
|
2^0
|
1
|
2^8
|
256
|
|
2^1
|
2
|
2^9
|
512
|
|
2^2
|
4
|
2^10
|
1,024
|
|
2^3
|
8
|
2^11
|
2,048
|
|
2^4
|
16
|
2^12
|
4,096
|
|
2^5
|
32
|
2^13
|
8,192
|
|
2^6
|
64
|
2^14
|
16,384
|
|
2^7
|
128
|
2^15
|
32,768
|
|
BIT
|
VALUE
|
N-BITS / H-BITS
|
MASK
|
|
1
|
128
|
1 / 7
|
10000000
|
|
2
|
192
|
2 / 6
|
11000000
|
|
3
|
224
|
3 / 6
|
11100000
|
|
4
|
240
|
4 / 4
|
11110000
|
|
5
|
248
|
5 / 3
|
11111000
|
|
6
|
252
|
6 / 2
|
11111100
|
|
7
|
254
|
7 / 1
|
11111110
|
|
8
|
255
|
8 / 0
|
11111111
|
|
# BLOCKS FOR LARGE #s
|
2^H / 256 = # BLOCKS
|
|
NUMBER OF SUBNETS =
|
2^n ( n = Number of borrowed bits from host)
|
|
NUMBER HOSTS PER SUBNET =
|
(2^h - 2) ( h = Number of Host bits)
|
Thank you Amanda for posting!
Robert Bone- You are absolutely welcome! I created it to have handy for a GIAC exam. I'm glad it was useful for you as well.
Thanks for building this cheat sheet for IP addressing. I have downloaded it to keep on hand.
Cheatography n. The art of mapping complex subjects into clear, instantly navigable reference guides.
