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)10.167.57.128/25
network10.167.57.128/25
broadcast10.167.57.255
first host10.167.57.129
last host10.167.57.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.57.128/25
address00001010.10100111.00111001.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00111001.10000000
broadcast00001010.10100111.00111001.11111111
green = network part, grey = host part
hex0x0aa73980
decimal178731392
reverse dns128.57.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:3980

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.57.128/3210.167.57.128 – 10.167.57.12810.167.57.128
210.167.57.129/3210.167.57.129 – 10.167.57.12910.167.57.129
310.167.57.130/3210.167.57.130 – 10.167.57.13010.167.57.130
410.167.57.131/3210.167.57.131 – 10.167.57.13110.167.57.131
510.167.57.132/3210.167.57.132 – 10.167.57.13210.167.57.132
610.167.57.133/3210.167.57.133 – 10.167.57.13310.167.57.133
710.167.57.134/3210.167.57.134 – 10.167.57.13410.167.57.134
810.167.57.135/3210.167.57.135 – 10.167.57.13510.167.57.135
910.167.57.136/3210.167.57.136 – 10.167.57.13610.167.57.136
1010.167.57.137/3210.167.57.137 – 10.167.57.13710.167.57.137
1110.167.57.138/3210.167.57.138 – 10.167.57.13810.167.57.138
1210.167.57.139/3210.167.57.139 – 10.167.57.13910.167.57.139
1310.167.57.140/3210.167.57.140 – 10.167.57.14010.167.57.140
1410.167.57.141/3210.167.57.141 – 10.167.57.14110.167.57.141
1510.167.57.142/3210.167.57.142 – 10.167.57.14210.167.57.142
1610.167.57.143/3210.167.57.143 – 10.167.57.14310.167.57.143
1710.167.57.144/3210.167.57.144 – 10.167.57.14410.167.57.144
1810.167.57.145/3210.167.57.145 – 10.167.57.14510.167.57.145
1910.167.57.146/3210.167.57.146 – 10.167.57.14610.167.57.146
2010.167.57.147/3210.167.57.147 – 10.167.57.14710.167.57.147
2110.167.57.148/3210.167.57.148 – 10.167.57.14810.167.57.148
2210.167.57.149/3210.167.57.149 – 10.167.57.14910.167.57.149
2310.167.57.150/3210.167.57.150 – 10.167.57.15010.167.57.150
2410.167.57.151/3210.167.57.151 – 10.167.57.15110.167.57.151
2510.167.57.152/3210.167.57.152 – 10.167.57.15210.167.57.152
2610.167.57.153/3210.167.57.153 – 10.167.57.15310.167.57.153
2710.167.57.154/3210.167.57.154 – 10.167.57.15410.167.57.154
2810.167.57.155/3210.167.57.155 – 10.167.57.15510.167.57.155
2910.167.57.156/3210.167.57.156 – 10.167.57.15610.167.57.156
3010.167.57.157/3210.167.57.157 – 10.167.57.15710.167.57.157
3110.167.57.158/3210.167.57.158 – 10.167.57.15810.167.57.158
3210.167.57.159/3210.167.57.159 – 10.167.57.15910.167.57.159
3310.167.57.160/3210.167.57.160 – 10.167.57.16010.167.57.160
3410.167.57.161/3210.167.57.161 – 10.167.57.16110.167.57.161
3510.167.57.162/3210.167.57.162 – 10.167.57.16210.167.57.162
3610.167.57.163/3210.167.57.163 – 10.167.57.16310.167.57.163
3710.167.57.164/3210.167.57.164 – 10.167.57.16410.167.57.164
3810.167.57.165/3210.167.57.165 – 10.167.57.16510.167.57.165
3910.167.57.166/3210.167.57.166 – 10.167.57.16610.167.57.166
4010.167.57.167/3210.167.57.167 – 10.167.57.16710.167.57.167
4110.167.57.168/3210.167.57.168 – 10.167.57.16810.167.57.168
4210.167.57.169/3210.167.57.169 – 10.167.57.16910.167.57.169
4310.167.57.170/3210.167.57.170 – 10.167.57.17010.167.57.170
4410.167.57.171/3210.167.57.171 – 10.167.57.17110.167.57.171
4510.167.57.172/3210.167.57.172 – 10.167.57.17210.167.57.172
4610.167.57.173/3210.167.57.173 – 10.167.57.17310.167.57.173
4710.167.57.174/3210.167.57.174 – 10.167.57.17410.167.57.174
4810.167.57.175/3210.167.57.175 – 10.167.57.17510.167.57.175
4910.167.57.176/3210.167.57.176 – 10.167.57.17610.167.57.176
5010.167.57.177/3210.167.57.177 – 10.167.57.17710.167.57.177
5110.167.57.178/3210.167.57.178 – 10.167.57.17810.167.57.178
5210.167.57.179/3210.167.57.179 – 10.167.57.17910.167.57.179
5310.167.57.180/3210.167.57.180 – 10.167.57.18010.167.57.180
5410.167.57.181/3210.167.57.181 – 10.167.57.18110.167.57.181
5510.167.57.182/3210.167.57.182 – 10.167.57.18210.167.57.182
5610.167.57.183/3210.167.57.183 – 10.167.57.18310.167.57.183
5710.167.57.184/3210.167.57.184 – 10.167.57.18410.167.57.184
5810.167.57.185/3210.167.57.185 – 10.167.57.18510.167.57.185
5910.167.57.186/3210.167.57.186 – 10.167.57.18610.167.57.186
6010.167.57.187/3210.167.57.187 – 10.167.57.18710.167.57.187
6110.167.57.188/3210.167.57.188 – 10.167.57.18810.167.57.188
6210.167.57.189/3210.167.57.189 – 10.167.57.18910.167.57.189
6310.167.57.190/3210.167.57.190 – 10.167.57.19010.167.57.190
6410.167.57.191/3210.167.57.191 – 10.167.57.19110.167.57.191
6510.167.57.192/3210.167.57.192 – 10.167.57.19210.167.57.192
6610.167.57.193/3210.167.57.193 – 10.167.57.19310.167.57.193
6710.167.57.194/3210.167.57.194 – 10.167.57.19410.167.57.194
6810.167.57.195/3210.167.57.195 – 10.167.57.19510.167.57.195
6910.167.57.196/3210.167.57.196 – 10.167.57.19610.167.57.196
7010.167.57.197/3210.167.57.197 – 10.167.57.19710.167.57.197
7110.167.57.198/3210.167.57.198 – 10.167.57.19810.167.57.198
7210.167.57.199/3210.167.57.199 – 10.167.57.19910.167.57.199
7310.167.57.200/3210.167.57.200 – 10.167.57.20010.167.57.200
7410.167.57.201/3210.167.57.201 – 10.167.57.20110.167.57.201
7510.167.57.202/3210.167.57.202 – 10.167.57.20210.167.57.202
7610.167.57.203/3210.167.57.203 – 10.167.57.20310.167.57.203
7710.167.57.204/3210.167.57.204 – 10.167.57.20410.167.57.204
7810.167.57.205/3210.167.57.205 – 10.167.57.20510.167.57.205
7910.167.57.206/3210.167.57.206 – 10.167.57.20610.167.57.206
8010.167.57.207/3210.167.57.207 – 10.167.57.20710.167.57.207
8110.167.57.208/3210.167.57.208 – 10.167.57.20810.167.57.208
8210.167.57.209/3210.167.57.209 – 10.167.57.20910.167.57.209
8310.167.57.210/3210.167.57.210 – 10.167.57.21010.167.57.210
8410.167.57.211/3210.167.57.211 – 10.167.57.21110.167.57.211
8510.167.57.212/3210.167.57.212 – 10.167.57.21210.167.57.212
8610.167.57.213/3210.167.57.213 – 10.167.57.21310.167.57.213
8710.167.57.214/3210.167.57.214 – 10.167.57.21410.167.57.214
8810.167.57.215/3210.167.57.215 – 10.167.57.21510.167.57.215
8910.167.57.216/3210.167.57.216 – 10.167.57.21610.167.57.216
9010.167.57.217/3210.167.57.217 – 10.167.57.21710.167.57.217
9110.167.57.218/3210.167.57.218 – 10.167.57.21810.167.57.218
9210.167.57.219/3210.167.57.219 – 10.167.57.21910.167.57.219
9310.167.57.220/3210.167.57.220 – 10.167.57.22010.167.57.220
9410.167.57.221/3210.167.57.221 – 10.167.57.22110.167.57.221
9510.167.57.222/3210.167.57.222 – 10.167.57.22210.167.57.222
9610.167.57.223/3210.167.57.223 – 10.167.57.22310.167.57.223
9710.167.57.224/3210.167.57.224 – 10.167.57.22410.167.57.224
9810.167.57.225/3210.167.57.225 – 10.167.57.22510.167.57.225
9910.167.57.226/3210.167.57.226 – 10.167.57.22610.167.57.226
10010.167.57.227/3210.167.57.227 – 10.167.57.22710.167.57.227
10110.167.57.228/3210.167.57.228 – 10.167.57.22810.167.57.228
10210.167.57.229/3210.167.57.229 – 10.167.57.22910.167.57.229
10310.167.57.230/3210.167.57.230 – 10.167.57.23010.167.57.230
10410.167.57.231/3210.167.57.231 – 10.167.57.23110.167.57.231
10510.167.57.232/3210.167.57.232 – 10.167.57.23210.167.57.232
10610.167.57.233/3210.167.57.233 – 10.167.57.23310.167.57.233
10710.167.57.234/3210.167.57.234 – 10.167.57.23410.167.57.234
10810.167.57.235/3210.167.57.235 – 10.167.57.23510.167.57.235
10910.167.57.236/3210.167.57.236 – 10.167.57.23610.167.57.236
11010.167.57.237/3210.167.57.237 – 10.167.57.23710.167.57.237
11110.167.57.238/3210.167.57.238 – 10.167.57.23810.167.57.238
11210.167.57.239/3210.167.57.239 – 10.167.57.23910.167.57.239
11310.167.57.240/3210.167.57.240 – 10.167.57.24010.167.57.240
11410.167.57.241/3210.167.57.241 – 10.167.57.24110.167.57.241
11510.167.57.242/3210.167.57.242 – 10.167.57.24210.167.57.242
11610.167.57.243/3210.167.57.243 – 10.167.57.24310.167.57.243
11710.167.57.244/3210.167.57.244 – 10.167.57.24410.167.57.244
11810.167.57.245/3210.167.57.245 – 10.167.57.24510.167.57.245
11910.167.57.246/3210.167.57.246 – 10.167.57.24610.167.57.246
12010.167.57.247/3210.167.57.247 – 10.167.57.24710.167.57.247
12110.167.57.248/3210.167.57.248 – 10.167.57.24810.167.57.248
12210.167.57.249/3210.167.57.249 – 10.167.57.24910.167.57.249
12310.167.57.250/3210.167.57.250 – 10.167.57.25010.167.57.250
12410.167.57.251/3210.167.57.251 – 10.167.57.25110.167.57.251
12510.167.57.252/3210.167.57.252 – 10.167.57.25210.167.57.252
12610.167.57.253/3210.167.57.253 – 10.167.57.25310.167.57.253
12710.167.57.254/3210.167.57.254 – 10.167.57.25410.167.57.254
12810.167.57.255/3210.167.57.255 – 10.167.57.25510.167.57.255
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 →