Subnet.im

Your simple subnet cheat sheet and subnet calculator

Subnet.im is a simple subnetting online cheat sheet, it's also got a built in helpful subnet calculator tool.
Just enter the IP Address and Mask above, as shown in the example, then press Calculate to see the results.

Free CURL API - Click Here

Network Mask
Addresses (Usable)
WildCard
/32
255.255.255.255
1 (0)
0.0.0.0
/31
255.255.255.254
2 (0)
0.0.0.1
/30
255.255.255.252
4 (2)
0.0.0.3
/29
255.255.255.248
8 (6)
0.0.0.7
/28
255.255.255.240
16 (14)
0.0.0.15
/27
255.255.255.224
32 (30)
0.0.0.31
/26
255.255.255.192
64 (62)
0.0.0.63
/25
255.255.255.128
128 (126)
0.0.0.127
/24
255.255.255.0
256 (254)
0.0.0.255
/23
255.255.254.0
512 (510)
0.0.1.255
/22
255.255.252.0
1,024
0.0.3.255
/21
255.255.248.0
2,048
0.0.7.255
/20
255.255.240.0
4,096
0.0.15.255
/19
255.255.224.0
8,192
0.0.31.255
/18
255.255.192.0
16,384
0.0.63.255
/17
255.255.128.0
32,768
0.0.127.255
/16
255.255.0.0
65,636
0.0.255.255
/15
255.254.0.0
131,072
0.1.255.255
/14
255.252.0.0
262,144
0.3.255.255
/13
255.248.0.0
524,288
0.7.255.255
/12
255.240.0.0
1,048,576
0.15.255.255
/11
255.224.0.0
2,097,152
0.31.255.255
/10
255.192.0.0
4,194,304
0.63.255.255
/9
255.128.0.0
8,388,608
0.127.255.255
/8
255.0.0.0
16,777,216
0.255.255.255
/7
254.0.0.0
33,554,432
1.255.255.255
/6
252.0.0.0
67,108,864
3.255.255.255
/5
248.0.0.0
134,217,728
7.255.255.255
/4
240.0.0.0
268,435,456
15.255.255.255
/3
224.0.0.0
536,870,912
31.255.255.255
/2
192.0.0.0
1,073,741,824
63.255.255.255
/1
128.0.0.0
2,147,483,648
127.255.255.255
/0
0.0.0.0
4,294,967,296
255.255.255.255