IPv4-SUBNETS-cheat-sheet-v1.pdf

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CIDR SUBNET MASK
/32
/31
/30
/29
/28
/27
/26
/25
/24
/23
/22
/21
/20
/19
/18
/17
/16
/15
/14
/13
/12
/11
/10
/9
/8
/7
/6
/5
/4
/3
/2
/1
/0
255.255.255.255
255.255.255.254
255.255.255.252
255.255.255.248
255.255.255.240
255.255.255.224
255.255.255.192
255.255.255.128
255.255.255.0
255.255.254.0
255.255.252.0
255.255.248.0
255.255.240.0
255.255.224.0
255.255.192.0
255.255.128.0
255.255.0.0
255.254.0.0
255.252.0.0
255.248.0.0
255.240.0.0
255.224.0.0
255.192.0.0
255.128.0.0
255.0.0.0
254.0.0.0
252.0.0.0
248.0.0.0
240.0.0.0
224.0.0.0
192.0.0.0
128.0.0.0
0.0.0.0
# OF ADDRESSES WILDCARD
1
2
4
8
16
32
64
128
256
512
1,024
2,048
4,096
8,192
16,384
32,768
65,536
131,072
262,144
524,288
1,048,576
2,097,152
4,194,304
8,388,608
16,777,216
33,554,432
67,108,864
134,217,728
268,435,456
536,870,912
1,073,741,824
2,147,483,648
4,294,967,296
0.0.0.0
0.0.0.1
0.0.0.3
0.0.0.7
0.0.0.15
0.0.0.31
0.0.0.63
0.0.0.127
0.0.0.255
0.0.1.255
0.0.3.255
0.0.7.255
0.0.15.255
0.0.31.255
0.0.63.255
0.0.127.255
0.0.255.255
0.1.255.255
0.3.255.255
0.7.255.255
0.15.255.255
0.31.255.255
0.63.255.255
0.127.255.255
0.255.255.255
1.255.255.255
3.255.255.255
7.255.255.255
15.255.255.255
31.255.255.255
63.255.255.255
127.255.255.255
255.255.255.255
172 . 16 . 254 . 1
10101100 .00010000 .11111110 .00000001
1 byte = 8 bits
32 bits (4 x 8), or 4 bytes
A
B
C
D
E
0.0.0.0
128.0.0.0
192.0.0.0
224.0.0.0
240.0.0.0
– 127.255.255.255
– 191.255.255.255
– 223.255.255.255
– 239.255.255.255
– 255.255.255.255
CLASS A
CLASS B
CLASS C
LOCALHOST
ZEROCONF
(APIPA/BONJOUR)
10.0.0.0 – 10.255.255.255
172.16.0.0 – 172.31.255.255
192.168.0.0 – 192.168.255.255
127.0.0.0 – 127.255.255.255
169.254.0.0 – 169.254.255.255
SUBNET MASK
255
254
252
248
240
224
192
128
0
1111 1111
1111 1110
1111 1100
1111 1000
1111 0000
1110 0000
1100 0000
1000 0000
0000 0000
WILDCARD
0
1
3
7
15
31
63
0000 0000
0000 0001
0000 0011
0000 0111
0000 1111
0001 1111
0011 1111
WILDCARD MASK
A wildcard mask indicates
which parts of an IP address are
available for examination.
Classless interdomain routing
was developed to provide more
granularity
than legacy classful addressing;
CIDR notation is expressed as /XX
CIDR
127
0111 1111
255
1111 1111
Find more StationX Cheat Sheets here
https://www.stationx.net/category/cheat-
sheet/

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