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)10.167.12.128/25
network10.167.12.128/25
broadcast10.167.12.255
first host10.167.12.129
last host10.167.12.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.12.128/25
address00001010.10100111.00001100.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00001100.10000000
broadcast00001010.10100111.00001100.11111111
green = network part, grey = host part
hex0x0aa70c80
decimal178719872
reverse dns128.12.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:c80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.12.128/3210.167.12.128 – 10.167.12.12810.167.12.128
210.167.12.129/3210.167.12.129 – 10.167.12.12910.167.12.129
310.167.12.130/3210.167.12.130 – 10.167.12.13010.167.12.130
410.167.12.131/3210.167.12.131 – 10.167.12.13110.167.12.131
510.167.12.132/3210.167.12.132 – 10.167.12.13210.167.12.132
610.167.12.133/3210.167.12.133 – 10.167.12.13310.167.12.133
710.167.12.134/3210.167.12.134 – 10.167.12.13410.167.12.134
810.167.12.135/3210.167.12.135 – 10.167.12.13510.167.12.135
910.167.12.136/3210.167.12.136 – 10.167.12.13610.167.12.136
1010.167.12.137/3210.167.12.137 – 10.167.12.13710.167.12.137
1110.167.12.138/3210.167.12.138 – 10.167.12.13810.167.12.138
1210.167.12.139/3210.167.12.139 – 10.167.12.13910.167.12.139
1310.167.12.140/3210.167.12.140 – 10.167.12.14010.167.12.140
1410.167.12.141/3210.167.12.141 – 10.167.12.14110.167.12.141
1510.167.12.142/3210.167.12.142 – 10.167.12.14210.167.12.142
1610.167.12.143/3210.167.12.143 – 10.167.12.14310.167.12.143
1710.167.12.144/3210.167.12.144 – 10.167.12.14410.167.12.144
1810.167.12.145/3210.167.12.145 – 10.167.12.14510.167.12.145
1910.167.12.146/3210.167.12.146 – 10.167.12.14610.167.12.146
2010.167.12.147/3210.167.12.147 – 10.167.12.14710.167.12.147
2110.167.12.148/3210.167.12.148 – 10.167.12.14810.167.12.148
2210.167.12.149/3210.167.12.149 – 10.167.12.14910.167.12.149
2310.167.12.150/3210.167.12.150 – 10.167.12.15010.167.12.150
2410.167.12.151/3210.167.12.151 – 10.167.12.15110.167.12.151
2510.167.12.152/3210.167.12.152 – 10.167.12.15210.167.12.152
2610.167.12.153/3210.167.12.153 – 10.167.12.15310.167.12.153
2710.167.12.154/3210.167.12.154 – 10.167.12.15410.167.12.154
2810.167.12.155/3210.167.12.155 – 10.167.12.15510.167.12.155
2910.167.12.156/3210.167.12.156 – 10.167.12.15610.167.12.156
3010.167.12.157/3210.167.12.157 – 10.167.12.15710.167.12.157
3110.167.12.158/3210.167.12.158 – 10.167.12.15810.167.12.158
3210.167.12.159/3210.167.12.159 – 10.167.12.15910.167.12.159
3310.167.12.160/3210.167.12.160 – 10.167.12.16010.167.12.160
3410.167.12.161/3210.167.12.161 – 10.167.12.16110.167.12.161
3510.167.12.162/3210.167.12.162 – 10.167.12.16210.167.12.162
3610.167.12.163/3210.167.12.163 – 10.167.12.16310.167.12.163
3710.167.12.164/3210.167.12.164 – 10.167.12.16410.167.12.164
3810.167.12.165/3210.167.12.165 – 10.167.12.16510.167.12.165
3910.167.12.166/3210.167.12.166 – 10.167.12.16610.167.12.166
4010.167.12.167/3210.167.12.167 – 10.167.12.16710.167.12.167
4110.167.12.168/3210.167.12.168 – 10.167.12.16810.167.12.168
4210.167.12.169/3210.167.12.169 – 10.167.12.16910.167.12.169
4310.167.12.170/3210.167.12.170 – 10.167.12.17010.167.12.170
4410.167.12.171/3210.167.12.171 – 10.167.12.17110.167.12.171
4510.167.12.172/3210.167.12.172 – 10.167.12.17210.167.12.172
4610.167.12.173/3210.167.12.173 – 10.167.12.17310.167.12.173
4710.167.12.174/3210.167.12.174 – 10.167.12.17410.167.12.174
4810.167.12.175/3210.167.12.175 – 10.167.12.17510.167.12.175
4910.167.12.176/3210.167.12.176 – 10.167.12.17610.167.12.176
5010.167.12.177/3210.167.12.177 – 10.167.12.17710.167.12.177
5110.167.12.178/3210.167.12.178 – 10.167.12.17810.167.12.178
5210.167.12.179/3210.167.12.179 – 10.167.12.17910.167.12.179
5310.167.12.180/3210.167.12.180 – 10.167.12.18010.167.12.180
5410.167.12.181/3210.167.12.181 – 10.167.12.18110.167.12.181
5510.167.12.182/3210.167.12.182 – 10.167.12.18210.167.12.182
5610.167.12.183/3210.167.12.183 – 10.167.12.18310.167.12.183
5710.167.12.184/3210.167.12.184 – 10.167.12.18410.167.12.184
5810.167.12.185/3210.167.12.185 – 10.167.12.18510.167.12.185
5910.167.12.186/3210.167.12.186 – 10.167.12.18610.167.12.186
6010.167.12.187/3210.167.12.187 – 10.167.12.18710.167.12.187
6110.167.12.188/3210.167.12.188 – 10.167.12.18810.167.12.188
6210.167.12.189/3210.167.12.189 – 10.167.12.18910.167.12.189
6310.167.12.190/3210.167.12.190 – 10.167.12.19010.167.12.190
6410.167.12.191/3210.167.12.191 – 10.167.12.19110.167.12.191
6510.167.12.192/3210.167.12.192 – 10.167.12.19210.167.12.192
6610.167.12.193/3210.167.12.193 – 10.167.12.19310.167.12.193
6710.167.12.194/3210.167.12.194 – 10.167.12.19410.167.12.194
6810.167.12.195/3210.167.12.195 – 10.167.12.19510.167.12.195
6910.167.12.196/3210.167.12.196 – 10.167.12.19610.167.12.196
7010.167.12.197/3210.167.12.197 – 10.167.12.19710.167.12.197
7110.167.12.198/3210.167.12.198 – 10.167.12.19810.167.12.198
7210.167.12.199/3210.167.12.199 – 10.167.12.19910.167.12.199
7310.167.12.200/3210.167.12.200 – 10.167.12.20010.167.12.200
7410.167.12.201/3210.167.12.201 – 10.167.12.20110.167.12.201
7510.167.12.202/3210.167.12.202 – 10.167.12.20210.167.12.202
7610.167.12.203/3210.167.12.203 – 10.167.12.20310.167.12.203
7710.167.12.204/3210.167.12.204 – 10.167.12.20410.167.12.204
7810.167.12.205/3210.167.12.205 – 10.167.12.20510.167.12.205
7910.167.12.206/3210.167.12.206 – 10.167.12.20610.167.12.206
8010.167.12.207/3210.167.12.207 – 10.167.12.20710.167.12.207
8110.167.12.208/3210.167.12.208 – 10.167.12.20810.167.12.208
8210.167.12.209/3210.167.12.209 – 10.167.12.20910.167.12.209
8310.167.12.210/3210.167.12.210 – 10.167.12.21010.167.12.210
8410.167.12.211/3210.167.12.211 – 10.167.12.21110.167.12.211
8510.167.12.212/3210.167.12.212 – 10.167.12.21210.167.12.212
8610.167.12.213/3210.167.12.213 – 10.167.12.21310.167.12.213
8710.167.12.214/3210.167.12.214 – 10.167.12.21410.167.12.214
8810.167.12.215/3210.167.12.215 – 10.167.12.21510.167.12.215
8910.167.12.216/3210.167.12.216 – 10.167.12.21610.167.12.216
9010.167.12.217/3210.167.12.217 – 10.167.12.21710.167.12.217
9110.167.12.218/3210.167.12.218 – 10.167.12.21810.167.12.218
9210.167.12.219/3210.167.12.219 – 10.167.12.21910.167.12.219
9310.167.12.220/3210.167.12.220 – 10.167.12.22010.167.12.220
9410.167.12.221/3210.167.12.221 – 10.167.12.22110.167.12.221
9510.167.12.222/3210.167.12.222 – 10.167.12.22210.167.12.222
9610.167.12.223/3210.167.12.223 – 10.167.12.22310.167.12.223
9710.167.12.224/3210.167.12.224 – 10.167.12.22410.167.12.224
9810.167.12.225/3210.167.12.225 – 10.167.12.22510.167.12.225
9910.167.12.226/3210.167.12.226 – 10.167.12.22610.167.12.226
10010.167.12.227/3210.167.12.227 – 10.167.12.22710.167.12.227
10110.167.12.228/3210.167.12.228 – 10.167.12.22810.167.12.228
10210.167.12.229/3210.167.12.229 – 10.167.12.22910.167.12.229
10310.167.12.230/3210.167.12.230 – 10.167.12.23010.167.12.230
10410.167.12.231/3210.167.12.231 – 10.167.12.23110.167.12.231
10510.167.12.232/3210.167.12.232 – 10.167.12.23210.167.12.232
10610.167.12.233/3210.167.12.233 – 10.167.12.23310.167.12.233
10710.167.12.234/3210.167.12.234 – 10.167.12.23410.167.12.234
10810.167.12.235/3210.167.12.235 – 10.167.12.23510.167.12.235
10910.167.12.236/3210.167.12.236 – 10.167.12.23610.167.12.236
11010.167.12.237/3210.167.12.237 – 10.167.12.23710.167.12.237
11110.167.12.238/3210.167.12.238 – 10.167.12.23810.167.12.238
11210.167.12.239/3210.167.12.239 – 10.167.12.23910.167.12.239
11310.167.12.240/3210.167.12.240 – 10.167.12.24010.167.12.240
11410.167.12.241/3210.167.12.241 – 10.167.12.24110.167.12.241
11510.167.12.242/3210.167.12.242 – 10.167.12.24210.167.12.242
11610.167.12.243/3210.167.12.243 – 10.167.12.24310.167.12.243
11710.167.12.244/3210.167.12.244 – 10.167.12.24410.167.12.244
11810.167.12.245/3210.167.12.245 – 10.167.12.24510.167.12.245
11910.167.12.246/3210.167.12.246 – 10.167.12.24610.167.12.246
12010.167.12.247/3210.167.12.247 – 10.167.12.24710.167.12.247
12110.167.12.248/3210.167.12.248 – 10.167.12.24810.167.12.248
12210.167.12.249/3210.167.12.249 – 10.167.12.24910.167.12.249
12310.167.12.250/3210.167.12.250 – 10.167.12.25010.167.12.250
12410.167.12.251/3210.167.12.251 – 10.167.12.25110.167.12.251
12510.167.12.252/3210.167.12.252 – 10.167.12.25210.167.12.252
12610.167.12.253/3210.167.12.253 – 10.167.12.25310.167.12.253
12710.167.12.254/3210.167.12.254 – 10.167.12.25410.167.12.254
12810.167.12.255/3210.167.12.255 – 10.167.12.25510.167.12.255
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 →