Subnet Mask Table

Subnet Mask Table

This Subnet Mask Table shows the IP address range for a Subnet Mask. The first and last IPs are broadcast addresses and cannot be used on your router or computer. The first line of each Subnet Mask shows the range of usable IP addresses; this is the maximiun number of devices you can use with the corresponding Subnet Mask.

A Subnet Mask does not works like an IP address, nor does it exist independently from an IP address. Subnet Masks accompany an IP address and the two values work together. Applying the subnet mask to an IP address splits the address into two parts, a "Class B Network" or "Extended network address" and a host address (device).

 

Subnet Mask decimal

 

Subnet Mask
Hex
Useable Devices
First
Broad
cast
Start
End
Address
Last
Broad
cast
255.255.255.0
0xffffff00
254
.0
.1 - .254
.255
255.255.255.128
0xffffff80
126
.0
.1- .126
.127
.128
.129 - .254
.255
255.255.255.192
0xffffffc0
62
.0
.1 - .62
.63
.64
.65 - .126
.127
.128
.129 - .190
.191
.192
.193 - .254
.255
255.255.255.224
0xffffffe0
30
.0
.1 - .30
.31
.32
.33 - .62
.63
.64
.65 -.94
.95
.96
.97 - .126
.127
.128
.129 - .158
.159
.160
.161 - 190
.191
.192
.193 -.222
.223
.224
.225 - .254
.255
255.255.255.240
0xfffffff0
14
.0
.1 - .14
.15
.16
.17 - .30
.31
.32
.33 - .46
.47
.48
.49 - .62
.63
.64
.65 - .78
.79
.80
.81 - .94
.95
.96
.97 - .110
.111
.112
.113 - .126
.127
.128
.129 - .142
.143
.144
.145 - .158
.159
.160
.161 - .174
.175
.176
1.77 - .190
.191
.192
.193 - .206
.207
.208
.209 - .222
.223
.224
.225 - .254
.255
255.255.255.248
0xfffffff8
6
.0
.1 - .6
.7
.8
.9 - .14
.15
.16
.17 - .22
.23
.24
.25 - .30
.31
.32
.33 - .38
.39
.40
.41 - ..46
.47
.48
.49 - .54
.55
.56
.57 - .62
.63
.64
.65 - .70
.71
.72
.73 - .78
.79
.80
.81 - .86
.87
.88
.89 - .94
.95
.96
.97 - .102
.103
.104
.105 - .110
.111
.112
.113 - .118
.119
.120
.121 - .126
.127
.128
.129 - .134
.135
.136
.136 - .142
.143
.144
.145 -.150
.151
.152
.153 - .158
.159
.160
.161 - 166
.167
.168
.169 - .174
.175
.176
.177 - .182
.183
.184
.185 - .190
.191
.192
.193 - .198
.199
.200
.201 - .206
.207
.208
.209 - .214
.215
.216
.217 - .222
.223
.224
.225 - .230
.231
.232
.233 - .238
.239
.240
.241 - .246
.247
.248
.249 - .254
.255
255.255.255.252
0xfffffffc
2
.0
.1 - .2
.3
.4
.5 - .6
.7
.8
.9 - .10
.11
.12
.13 - .14
.15
.16
.17 - .18
.19
.20
.21 -.22
.23
.24
.25 -.26
.27
.28
.29 -.30
.31
.32
.33 -.34
.35
.36
.37 -.38
.39
.40
.41 -.42
.43
.44
.45 -.46
.47
.48
.49 -.50
.51
.52
.53 -.54
.55
.56
.57 -.58
.59
.60
.61 - .62
.63
.64
.65 -.66
.67
.68
.69 -.70
.71
.72
.73 -.74
.75
.76
.77 -.78
.79
.80
.81 - .82
.83
.84
.85 - .86
.87
.88
.89 -.90
.91
.92
.93 - .94
.95
.96
.97 - .98
.99
.100
.101 - .102
.103
.104
.105 - .106
.107
.108
.109 -.110
.111
.112
.113 - .114
.115
.116
.117 - .118
.119
.120
.121 -.122
.123
.124
.125 -.126
.127
.128
.129 -.130
.131
.132
.133 -.134
.135
.136
.137 -.138
.139
.140
.141 -.142
.143
.144
.145 -.146
.147
.148
.149 -.150
.151
.152
.153 -.154
.155
.156
.157 - .158
.159
.160
.161 - .162
.163
.164
.165 -.166
.167
.168
.169 -.170
.171
.172
.173 -.174
.175
.176
.177 -.178
.179
.180
.181 - .182
.183
.184
.185 - .186
.187
.188
.189 -.190
.191
.192
.193 - .194
.195
.196
.197 - .198
.199
.200
.201 - .202
.203
.204
.205 - .206
.207
.208
.209 - .210
.211
.212
.213 - .214
.215
.216
.217 - .218
.219
.220
.221 - .222
.223
.224
.225 - .226
.227
.228
.229 -.230
.213
.232
.233 - .234
.235
.236
2.37 - .238
.239
.240
.241 - .242
.243
.244
.245 - .246
.247
.248
.249 - .250
.251
.252
.253 - .254
.255

Subnet Mask: 255.255.255.255 - 0xffffffff uses just one IP address so there is only 1 host or device

 

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