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)10.167.15.128/25
network10.167.15.128/25
broadcast10.167.15.255
first host10.167.15.129
last host10.167.15.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.15.128/25
address00001010.10100111.00001111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00001111.10000000
broadcast00001010.10100111.00001111.11111111
green = network part, grey = host part
hex0x0aa70f80
decimal178720640
reverse dns128.15.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:f80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.15.128/3210.167.15.128 – 10.167.15.12810.167.15.128
210.167.15.129/3210.167.15.129 – 10.167.15.12910.167.15.129
310.167.15.130/3210.167.15.130 – 10.167.15.13010.167.15.130
410.167.15.131/3210.167.15.131 – 10.167.15.13110.167.15.131
510.167.15.132/3210.167.15.132 – 10.167.15.13210.167.15.132
610.167.15.133/3210.167.15.133 – 10.167.15.13310.167.15.133
710.167.15.134/3210.167.15.134 – 10.167.15.13410.167.15.134
810.167.15.135/3210.167.15.135 – 10.167.15.13510.167.15.135
910.167.15.136/3210.167.15.136 – 10.167.15.13610.167.15.136
1010.167.15.137/3210.167.15.137 – 10.167.15.13710.167.15.137
1110.167.15.138/3210.167.15.138 – 10.167.15.13810.167.15.138
1210.167.15.139/3210.167.15.139 – 10.167.15.13910.167.15.139
1310.167.15.140/3210.167.15.140 – 10.167.15.14010.167.15.140
1410.167.15.141/3210.167.15.141 – 10.167.15.14110.167.15.141
1510.167.15.142/3210.167.15.142 – 10.167.15.14210.167.15.142
1610.167.15.143/3210.167.15.143 – 10.167.15.14310.167.15.143
1710.167.15.144/3210.167.15.144 – 10.167.15.14410.167.15.144
1810.167.15.145/3210.167.15.145 – 10.167.15.14510.167.15.145
1910.167.15.146/3210.167.15.146 – 10.167.15.14610.167.15.146
2010.167.15.147/3210.167.15.147 – 10.167.15.14710.167.15.147
2110.167.15.148/3210.167.15.148 – 10.167.15.14810.167.15.148
2210.167.15.149/3210.167.15.149 – 10.167.15.14910.167.15.149
2310.167.15.150/3210.167.15.150 – 10.167.15.15010.167.15.150
2410.167.15.151/3210.167.15.151 – 10.167.15.15110.167.15.151
2510.167.15.152/3210.167.15.152 – 10.167.15.15210.167.15.152
2610.167.15.153/3210.167.15.153 – 10.167.15.15310.167.15.153
2710.167.15.154/3210.167.15.154 – 10.167.15.15410.167.15.154
2810.167.15.155/3210.167.15.155 – 10.167.15.15510.167.15.155
2910.167.15.156/3210.167.15.156 – 10.167.15.15610.167.15.156
3010.167.15.157/3210.167.15.157 – 10.167.15.15710.167.15.157
3110.167.15.158/3210.167.15.158 – 10.167.15.15810.167.15.158
3210.167.15.159/3210.167.15.159 – 10.167.15.15910.167.15.159
3310.167.15.160/3210.167.15.160 – 10.167.15.16010.167.15.160
3410.167.15.161/3210.167.15.161 – 10.167.15.16110.167.15.161
3510.167.15.162/3210.167.15.162 – 10.167.15.16210.167.15.162
3610.167.15.163/3210.167.15.163 – 10.167.15.16310.167.15.163
3710.167.15.164/3210.167.15.164 – 10.167.15.16410.167.15.164
3810.167.15.165/3210.167.15.165 – 10.167.15.16510.167.15.165
3910.167.15.166/3210.167.15.166 – 10.167.15.16610.167.15.166
4010.167.15.167/3210.167.15.167 – 10.167.15.16710.167.15.167
4110.167.15.168/3210.167.15.168 – 10.167.15.16810.167.15.168
4210.167.15.169/3210.167.15.169 – 10.167.15.16910.167.15.169
4310.167.15.170/3210.167.15.170 – 10.167.15.17010.167.15.170
4410.167.15.171/3210.167.15.171 – 10.167.15.17110.167.15.171
4510.167.15.172/3210.167.15.172 – 10.167.15.17210.167.15.172
4610.167.15.173/3210.167.15.173 – 10.167.15.17310.167.15.173
4710.167.15.174/3210.167.15.174 – 10.167.15.17410.167.15.174
4810.167.15.175/3210.167.15.175 – 10.167.15.17510.167.15.175
4910.167.15.176/3210.167.15.176 – 10.167.15.17610.167.15.176
5010.167.15.177/3210.167.15.177 – 10.167.15.17710.167.15.177
5110.167.15.178/3210.167.15.178 – 10.167.15.17810.167.15.178
5210.167.15.179/3210.167.15.179 – 10.167.15.17910.167.15.179
5310.167.15.180/3210.167.15.180 – 10.167.15.18010.167.15.180
5410.167.15.181/3210.167.15.181 – 10.167.15.18110.167.15.181
5510.167.15.182/3210.167.15.182 – 10.167.15.18210.167.15.182
5610.167.15.183/3210.167.15.183 – 10.167.15.18310.167.15.183
5710.167.15.184/3210.167.15.184 – 10.167.15.18410.167.15.184
5810.167.15.185/3210.167.15.185 – 10.167.15.18510.167.15.185
5910.167.15.186/3210.167.15.186 – 10.167.15.18610.167.15.186
6010.167.15.187/3210.167.15.187 – 10.167.15.18710.167.15.187
6110.167.15.188/3210.167.15.188 – 10.167.15.18810.167.15.188
6210.167.15.189/3210.167.15.189 – 10.167.15.18910.167.15.189
6310.167.15.190/3210.167.15.190 – 10.167.15.19010.167.15.190
6410.167.15.191/3210.167.15.191 – 10.167.15.19110.167.15.191
6510.167.15.192/3210.167.15.192 – 10.167.15.19210.167.15.192
6610.167.15.193/3210.167.15.193 – 10.167.15.19310.167.15.193
6710.167.15.194/3210.167.15.194 – 10.167.15.19410.167.15.194
6810.167.15.195/3210.167.15.195 – 10.167.15.19510.167.15.195
6910.167.15.196/3210.167.15.196 – 10.167.15.19610.167.15.196
7010.167.15.197/3210.167.15.197 – 10.167.15.19710.167.15.197
7110.167.15.198/3210.167.15.198 – 10.167.15.19810.167.15.198
7210.167.15.199/3210.167.15.199 – 10.167.15.19910.167.15.199
7310.167.15.200/3210.167.15.200 – 10.167.15.20010.167.15.200
7410.167.15.201/3210.167.15.201 – 10.167.15.20110.167.15.201
7510.167.15.202/3210.167.15.202 – 10.167.15.20210.167.15.202
7610.167.15.203/3210.167.15.203 – 10.167.15.20310.167.15.203
7710.167.15.204/3210.167.15.204 – 10.167.15.20410.167.15.204
7810.167.15.205/3210.167.15.205 – 10.167.15.20510.167.15.205
7910.167.15.206/3210.167.15.206 – 10.167.15.20610.167.15.206
8010.167.15.207/3210.167.15.207 – 10.167.15.20710.167.15.207
8110.167.15.208/3210.167.15.208 – 10.167.15.20810.167.15.208
8210.167.15.209/3210.167.15.209 – 10.167.15.20910.167.15.209
8310.167.15.210/3210.167.15.210 – 10.167.15.21010.167.15.210
8410.167.15.211/3210.167.15.211 – 10.167.15.21110.167.15.211
8510.167.15.212/3210.167.15.212 – 10.167.15.21210.167.15.212
8610.167.15.213/3210.167.15.213 – 10.167.15.21310.167.15.213
8710.167.15.214/3210.167.15.214 – 10.167.15.21410.167.15.214
8810.167.15.215/3210.167.15.215 – 10.167.15.21510.167.15.215
8910.167.15.216/3210.167.15.216 – 10.167.15.21610.167.15.216
9010.167.15.217/3210.167.15.217 – 10.167.15.21710.167.15.217
9110.167.15.218/3210.167.15.218 – 10.167.15.21810.167.15.218
9210.167.15.219/3210.167.15.219 – 10.167.15.21910.167.15.219
9310.167.15.220/3210.167.15.220 – 10.167.15.22010.167.15.220
9410.167.15.221/3210.167.15.221 – 10.167.15.22110.167.15.221
9510.167.15.222/3210.167.15.222 – 10.167.15.22210.167.15.222
9610.167.15.223/3210.167.15.223 – 10.167.15.22310.167.15.223
9710.167.15.224/3210.167.15.224 – 10.167.15.22410.167.15.224
9810.167.15.225/3210.167.15.225 – 10.167.15.22510.167.15.225
9910.167.15.226/3210.167.15.226 – 10.167.15.22610.167.15.226
10010.167.15.227/3210.167.15.227 – 10.167.15.22710.167.15.227
10110.167.15.228/3210.167.15.228 – 10.167.15.22810.167.15.228
10210.167.15.229/3210.167.15.229 – 10.167.15.22910.167.15.229
10310.167.15.230/3210.167.15.230 – 10.167.15.23010.167.15.230
10410.167.15.231/3210.167.15.231 – 10.167.15.23110.167.15.231
10510.167.15.232/3210.167.15.232 – 10.167.15.23210.167.15.232
10610.167.15.233/3210.167.15.233 – 10.167.15.23310.167.15.233
10710.167.15.234/3210.167.15.234 – 10.167.15.23410.167.15.234
10810.167.15.235/3210.167.15.235 – 10.167.15.23510.167.15.235
10910.167.15.236/3210.167.15.236 – 10.167.15.23610.167.15.236
11010.167.15.237/3210.167.15.237 – 10.167.15.23710.167.15.237
11110.167.15.238/3210.167.15.238 – 10.167.15.23810.167.15.238
11210.167.15.239/3210.167.15.239 – 10.167.15.23910.167.15.239
11310.167.15.240/3210.167.15.240 – 10.167.15.24010.167.15.240
11410.167.15.241/3210.167.15.241 – 10.167.15.24110.167.15.241
11510.167.15.242/3210.167.15.242 – 10.167.15.24210.167.15.242
11610.167.15.243/3210.167.15.243 – 10.167.15.24310.167.15.243
11710.167.15.244/3210.167.15.244 – 10.167.15.24410.167.15.244
11810.167.15.245/3210.167.15.245 – 10.167.15.24510.167.15.245
11910.167.15.246/3210.167.15.246 – 10.167.15.24610.167.15.246
12010.167.15.247/3210.167.15.247 – 10.167.15.24710.167.15.247
12110.167.15.248/3210.167.15.248 – 10.167.15.24810.167.15.248
12210.167.15.249/3210.167.15.249 – 10.167.15.24910.167.15.249
12310.167.15.250/3210.167.15.250 – 10.167.15.25010.167.15.250
12410.167.15.251/3210.167.15.251 – 10.167.15.25110.167.15.251
12510.167.15.252/3210.167.15.252 – 10.167.15.25210.167.15.252
12610.167.15.253/3210.167.15.253 – 10.167.15.25310.167.15.253
12710.167.15.254/3210.167.15.254 – 10.167.15.25410.167.15.254
12810.167.15.255/3210.167.15.255 – 10.167.15.25510.167.15.255
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 →