IPv4 Subnet Chart
Class address ranges:
- Class A = 1.0.0.0 to 126.0.0.0
- Class B = 128.0.0.0 to 191.255.0.0
- Class C = 192.0.1.0 to 223.255.255.0
Reserved address ranges for private (non-routed) use
- 10.0.0.0 -> 10.255.255.255
- 172.16.0.0 -> 172.31.255.255
- 192.168.0.0 -> 192.168.255.255
Other reserved addresses:
- 127.0.0.0 is reserved for loopback and IPC on the local host
- 224.0.0.0 -> 239.255.255.255 is reserved for multicast addresses
|
Network Bits
|
Subnet Mask
|
Number of Subnets
|
Number of Hosts
|
|
/8
|
255.0.0.0
|
0
|
16777214
|
|
/9
|
255.128.0.0
|
2 (0)
|
8388606
|
|
/10
|
255.192.0.0
|
4 (2)
|
4194302
|
|
/11
|
255.224.0.0
|
8 (6)
|
2097150
|
|
/12
|
255.240.0.0
|
16 (14)
|
1048574
|
|
/13
|
255.248.0.0
|
32 (30)
|
524286
|
|
/14
|
255.252.0.0
|
64 (62)
|
262142
|
|
/15
|
255.254.0.0
|
128 (126)
|
131070
|
|
/16
|
255.255.0.0
|
256 (254)
|
65534
|
|
/17
|
255.255.128.0
|
512 (510)
|
32766
|
|
/18
|
255.255.192.0
|
1024 (1022)
|
16382
|
|
/19
|
255.255.224.0
|
2048 (2046)
|
8190
|
|
/20
|
255.255.240.0
|
4096 (4094)
|
4094
|
|
/21
|
255.255.248.0
|
8192 (8190)
|
2046
|
|
/22
|
255.255.252.0
|
16384 (16382)
|
1022
|
|
/23
|
255.255.254.0
|
32768 (32766)
|
510
|
|
/24
|
255.255.255.0
|
65536 (65534)
|
254
|
|
/25
|
255.255.255.128
|
131072 (131070)
|
126
|
|
/26
|
255.255.255.192
|
262144 (262142)
|
62
|
|
/27
|
255.255.255.224
|
524288 (524286)
|
30
|
|
/28
|
255.255.255.240
|
1048576 (1048574)
|
14
|
|
/29
|
255.255.255.248
|
2097152 (2097150)
|
6
|
|
/30
|
255.255.255.252
|
4194304 (4194302)
|
2
|
|
