ip
ipku.in

IPv4 Subnet Calculator

Enter an IP with a CIDR prefix or a subnet mask to see its network, broadcast, host range, and host count. You can also split the network into smaller subnets.

$ ipcalc
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.167.207.128/25
network10.167.207.128/25
broadcast10.167.207.255
first host10.167.207.129
last host10.167.207.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.207.128/25
address00001010.10100111.11001111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.11001111.10000000
broadcast00001010.10100111.11001111.11111111
green = network part, grey = host part
hex0x0aa7cf80
decimal178769792
reverse dns128.207.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:cf80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.207.128/3210.167.207.128 – 10.167.207.12810.167.207.128
210.167.207.129/3210.167.207.129 – 10.167.207.12910.167.207.129
310.167.207.130/3210.167.207.130 – 10.167.207.13010.167.207.130
410.167.207.131/3210.167.207.131 – 10.167.207.13110.167.207.131
510.167.207.132/3210.167.207.132 – 10.167.207.13210.167.207.132
610.167.207.133/3210.167.207.133 – 10.167.207.13310.167.207.133
710.167.207.134/3210.167.207.134 – 10.167.207.13410.167.207.134
810.167.207.135/3210.167.207.135 – 10.167.207.13510.167.207.135
910.167.207.136/3210.167.207.136 – 10.167.207.13610.167.207.136
1010.167.207.137/3210.167.207.137 – 10.167.207.13710.167.207.137
1110.167.207.138/3210.167.207.138 – 10.167.207.13810.167.207.138
1210.167.207.139/3210.167.207.139 – 10.167.207.13910.167.207.139
1310.167.207.140/3210.167.207.140 – 10.167.207.14010.167.207.140
1410.167.207.141/3210.167.207.141 – 10.167.207.14110.167.207.141
1510.167.207.142/3210.167.207.142 – 10.167.207.14210.167.207.142
1610.167.207.143/3210.167.207.143 – 10.167.207.14310.167.207.143
1710.167.207.144/3210.167.207.144 – 10.167.207.14410.167.207.144
1810.167.207.145/3210.167.207.145 – 10.167.207.14510.167.207.145
1910.167.207.146/3210.167.207.146 – 10.167.207.14610.167.207.146
2010.167.207.147/3210.167.207.147 – 10.167.207.14710.167.207.147
2110.167.207.148/3210.167.207.148 – 10.167.207.14810.167.207.148
2210.167.207.149/3210.167.207.149 – 10.167.207.14910.167.207.149
2310.167.207.150/3210.167.207.150 – 10.167.207.15010.167.207.150
2410.167.207.151/3210.167.207.151 – 10.167.207.15110.167.207.151
2510.167.207.152/3210.167.207.152 – 10.167.207.15210.167.207.152
2610.167.207.153/3210.167.207.153 – 10.167.207.15310.167.207.153
2710.167.207.154/3210.167.207.154 – 10.167.207.15410.167.207.154
2810.167.207.155/3210.167.207.155 – 10.167.207.15510.167.207.155
2910.167.207.156/3210.167.207.156 – 10.167.207.15610.167.207.156
3010.167.207.157/3210.167.207.157 – 10.167.207.15710.167.207.157
3110.167.207.158/3210.167.207.158 – 10.167.207.15810.167.207.158
3210.167.207.159/3210.167.207.159 – 10.167.207.15910.167.207.159
3310.167.207.160/3210.167.207.160 – 10.167.207.16010.167.207.160
3410.167.207.161/3210.167.207.161 – 10.167.207.16110.167.207.161
3510.167.207.162/3210.167.207.162 – 10.167.207.16210.167.207.162
3610.167.207.163/3210.167.207.163 – 10.167.207.16310.167.207.163
3710.167.207.164/3210.167.207.164 – 10.167.207.16410.167.207.164
3810.167.207.165/3210.167.207.165 – 10.167.207.16510.167.207.165
3910.167.207.166/3210.167.207.166 – 10.167.207.16610.167.207.166
4010.167.207.167/3210.167.207.167 – 10.167.207.16710.167.207.167
4110.167.207.168/3210.167.207.168 – 10.167.207.16810.167.207.168
4210.167.207.169/3210.167.207.169 – 10.167.207.16910.167.207.169
4310.167.207.170/3210.167.207.170 – 10.167.207.17010.167.207.170
4410.167.207.171/3210.167.207.171 – 10.167.207.17110.167.207.171
4510.167.207.172/3210.167.207.172 – 10.167.207.17210.167.207.172
4610.167.207.173/3210.167.207.173 – 10.167.207.17310.167.207.173
4710.167.207.174/3210.167.207.174 – 10.167.207.17410.167.207.174
4810.167.207.175/3210.167.207.175 – 10.167.207.17510.167.207.175
4910.167.207.176/3210.167.207.176 – 10.167.207.17610.167.207.176
5010.167.207.177/3210.167.207.177 – 10.167.207.17710.167.207.177
5110.167.207.178/3210.167.207.178 – 10.167.207.17810.167.207.178
5210.167.207.179/3210.167.207.179 – 10.167.207.17910.167.207.179
5310.167.207.180/3210.167.207.180 – 10.167.207.18010.167.207.180
5410.167.207.181/3210.167.207.181 – 10.167.207.18110.167.207.181
5510.167.207.182/3210.167.207.182 – 10.167.207.18210.167.207.182
5610.167.207.183/3210.167.207.183 – 10.167.207.18310.167.207.183
5710.167.207.184/3210.167.207.184 – 10.167.207.18410.167.207.184
5810.167.207.185/3210.167.207.185 – 10.167.207.18510.167.207.185
5910.167.207.186/3210.167.207.186 – 10.167.207.18610.167.207.186
6010.167.207.187/3210.167.207.187 – 10.167.207.18710.167.207.187
6110.167.207.188/3210.167.207.188 – 10.167.207.18810.167.207.188
6210.167.207.189/3210.167.207.189 – 10.167.207.18910.167.207.189
6310.167.207.190/3210.167.207.190 – 10.167.207.19010.167.207.190
6410.167.207.191/3210.167.207.191 – 10.167.207.19110.167.207.191
6510.167.207.192/3210.167.207.192 – 10.167.207.19210.167.207.192
6610.167.207.193/3210.167.207.193 – 10.167.207.19310.167.207.193
6710.167.207.194/3210.167.207.194 – 10.167.207.19410.167.207.194
6810.167.207.195/3210.167.207.195 – 10.167.207.19510.167.207.195
6910.167.207.196/3210.167.207.196 – 10.167.207.19610.167.207.196
7010.167.207.197/3210.167.207.197 – 10.167.207.19710.167.207.197
7110.167.207.198/3210.167.207.198 – 10.167.207.19810.167.207.198
7210.167.207.199/3210.167.207.199 – 10.167.207.19910.167.207.199
7310.167.207.200/3210.167.207.200 – 10.167.207.20010.167.207.200
7410.167.207.201/3210.167.207.201 – 10.167.207.20110.167.207.201
7510.167.207.202/3210.167.207.202 – 10.167.207.20210.167.207.202
7610.167.207.203/3210.167.207.203 – 10.167.207.20310.167.207.203
7710.167.207.204/3210.167.207.204 – 10.167.207.20410.167.207.204
7810.167.207.205/3210.167.207.205 – 10.167.207.20510.167.207.205
7910.167.207.206/3210.167.207.206 – 10.167.207.20610.167.207.206
8010.167.207.207/3210.167.207.207 – 10.167.207.20710.167.207.207
8110.167.207.208/3210.167.207.208 – 10.167.207.20810.167.207.208
8210.167.207.209/3210.167.207.209 – 10.167.207.20910.167.207.209
8310.167.207.210/3210.167.207.210 – 10.167.207.21010.167.207.210
8410.167.207.211/3210.167.207.211 – 10.167.207.21110.167.207.211
8510.167.207.212/3210.167.207.212 – 10.167.207.21210.167.207.212
8610.167.207.213/3210.167.207.213 – 10.167.207.21310.167.207.213
8710.167.207.214/3210.167.207.214 – 10.167.207.21410.167.207.214
8810.167.207.215/3210.167.207.215 – 10.167.207.21510.167.207.215
8910.167.207.216/3210.167.207.216 – 10.167.207.21610.167.207.216
9010.167.207.217/3210.167.207.217 – 10.167.207.21710.167.207.217
9110.167.207.218/3210.167.207.218 – 10.167.207.21810.167.207.218
9210.167.207.219/3210.167.207.219 – 10.167.207.21910.167.207.219
9310.167.207.220/3210.167.207.220 – 10.167.207.22010.167.207.220
9410.167.207.221/3210.167.207.221 – 10.167.207.22110.167.207.221
9510.167.207.222/3210.167.207.222 – 10.167.207.22210.167.207.222
9610.167.207.223/3210.167.207.223 – 10.167.207.22310.167.207.223
9710.167.207.224/3210.167.207.224 – 10.167.207.22410.167.207.224
9810.167.207.225/3210.167.207.225 – 10.167.207.22510.167.207.225
9910.167.207.226/3210.167.207.226 – 10.167.207.22610.167.207.226
10010.167.207.227/3210.167.207.227 – 10.167.207.22710.167.207.227
10110.167.207.228/3210.167.207.228 – 10.167.207.22810.167.207.228
10210.167.207.229/3210.167.207.229 – 10.167.207.22910.167.207.229
10310.167.207.230/3210.167.207.230 – 10.167.207.23010.167.207.230
10410.167.207.231/3210.167.207.231 – 10.167.207.23110.167.207.231
10510.167.207.232/3210.167.207.232 – 10.167.207.23210.167.207.232
10610.167.207.233/3210.167.207.233 – 10.167.207.23310.167.207.233
10710.167.207.234/3210.167.207.234 – 10.167.207.23410.167.207.234
10810.167.207.235/3210.167.207.235 – 10.167.207.23510.167.207.235
10910.167.207.236/3210.167.207.236 – 10.167.207.23610.167.207.236
11010.167.207.237/3210.167.207.237 – 10.167.207.23710.167.207.237
11110.167.207.238/3210.167.207.238 – 10.167.207.23810.167.207.238
11210.167.207.239/3210.167.207.239 – 10.167.207.23910.167.207.239
11310.167.207.240/3210.167.207.240 – 10.167.207.24010.167.207.240
11410.167.207.241/3210.167.207.241 – 10.167.207.24110.167.207.241
11510.167.207.242/3210.167.207.242 – 10.167.207.24210.167.207.242
11610.167.207.243/3210.167.207.243 – 10.167.207.24310.167.207.243
11710.167.207.244/3210.167.207.244 – 10.167.207.24410.167.207.244
11810.167.207.245/3210.167.207.245 – 10.167.207.24510.167.207.245
11910.167.207.246/3210.167.207.246 – 10.167.207.24610.167.207.246
12010.167.207.247/3210.167.207.247 – 10.167.207.24710.167.207.247
12110.167.207.248/3210.167.207.248 – 10.167.207.24810.167.207.248
12210.167.207.249/3210.167.207.249 – 10.167.207.24910.167.207.249
12310.167.207.250/3210.167.207.250 – 10.167.207.25010.167.207.250
12410.167.207.251/3210.167.207.251 – 10.167.207.25110.167.207.251
12510.167.207.252/3210.167.207.252 – 10.167.207.25210.167.207.252
12610.167.207.253/3210.167.207.253 – 10.167.207.25310.167.207.253
12710.167.207.254/3210.167.207.254 – 10.167.207.25410.167.207.254
12810.167.207.255/3210.167.207.255 – 10.167.207.25510.167.207.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /25
/00.0.0.04,294,967,2964,294,967,294-
/1128.0.0.02,147,483,6482,147,483,646-
/2192.0.0.01,073,741,8241,073,741,822-
/3224.0.0.0536,870,912536,870,910-
/4240.0.0.0268,435,456268,435,454-
/5248.0.0.0134,217,728134,217,726-
/6252.0.0.067,108,86467,108,862-
/7254.0.0.033,554,43233,554,430-
/8255.0.0.016,777,21616,777,214-
/9255.128.0.08,388,6088,388,606-
/10255.192.0.04,194,3044,194,302-
/11255.224.0.02,097,1522,097,150-
/12255.240.0.01,048,5761,048,574-
/13255.248.0.0524,288524,286-
/14255.252.0.0262,144262,142-
/15255.254.0.0131,072131,070-
/16255.255.0.065,53665,534-
/17255.255.128.032,76832,766-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,022-
/23255.255.254.0512510-
/24255.255.255.0256254-
/25255.255.255.1281281261
/26255.255.255.19264622 split →
/27255.255.255.22432304 split →
/28255.255.255.24016148 split →
/29255.255.255.2488616 split →
/30255.255.255.2524232 split →
/31255.255.255.2542264 split →
/32255.255.255.25511128 split →
02 / faq

About this calculator.

How do I use this subnet calculator?

▼

Type an IP address followed by a prefix, like 192.168.1.10/24, or by a subnet mask, like 192.168.1.10 255.255.255.0. Without a prefix it uses /24. Click a row in the table to split the network into smaller subnets.

Why are usable hosts always 2 fewer?

▼

The first address in a subnet is the network address and the last is the broadcast address, so neither can go to a device. The exceptions are /31 (point-to-point links, RFC 3021) and /32 (a single address), which use every address.

Can I use it from a terminal?

▼

Yes. curl 'ipku.in/en/tools/ipv4-subnet-calculator?q=192.168.1.10/24' returns the result as plain text.

Learn how to work it out →