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)10.167.87.128/25
network10.167.87.128/25
broadcast10.167.87.255
first host10.167.87.129
last host10.167.87.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.87.128/25
address00001010.10100111.01010111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01010111.10000000
broadcast00001010.10100111.01010111.11111111
green = network part, grey = host part
hex0x0aa75780
decimal178739072
reverse dns128.87.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:5780

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.87.128/3210.167.87.128 – 10.167.87.12810.167.87.128
210.167.87.129/3210.167.87.129 – 10.167.87.12910.167.87.129
310.167.87.130/3210.167.87.130 – 10.167.87.13010.167.87.130
410.167.87.131/3210.167.87.131 – 10.167.87.13110.167.87.131
510.167.87.132/3210.167.87.132 – 10.167.87.13210.167.87.132
610.167.87.133/3210.167.87.133 – 10.167.87.13310.167.87.133
710.167.87.134/3210.167.87.134 – 10.167.87.13410.167.87.134
810.167.87.135/3210.167.87.135 – 10.167.87.13510.167.87.135
910.167.87.136/3210.167.87.136 – 10.167.87.13610.167.87.136
1010.167.87.137/3210.167.87.137 – 10.167.87.13710.167.87.137
1110.167.87.138/3210.167.87.138 – 10.167.87.13810.167.87.138
1210.167.87.139/3210.167.87.139 – 10.167.87.13910.167.87.139
1310.167.87.140/3210.167.87.140 – 10.167.87.14010.167.87.140
1410.167.87.141/3210.167.87.141 – 10.167.87.14110.167.87.141
1510.167.87.142/3210.167.87.142 – 10.167.87.14210.167.87.142
1610.167.87.143/3210.167.87.143 – 10.167.87.14310.167.87.143
1710.167.87.144/3210.167.87.144 – 10.167.87.14410.167.87.144
1810.167.87.145/3210.167.87.145 – 10.167.87.14510.167.87.145
1910.167.87.146/3210.167.87.146 – 10.167.87.14610.167.87.146
2010.167.87.147/3210.167.87.147 – 10.167.87.14710.167.87.147
2110.167.87.148/3210.167.87.148 – 10.167.87.14810.167.87.148
2210.167.87.149/3210.167.87.149 – 10.167.87.14910.167.87.149
2310.167.87.150/3210.167.87.150 – 10.167.87.15010.167.87.150
2410.167.87.151/3210.167.87.151 – 10.167.87.15110.167.87.151
2510.167.87.152/3210.167.87.152 – 10.167.87.15210.167.87.152
2610.167.87.153/3210.167.87.153 – 10.167.87.15310.167.87.153
2710.167.87.154/3210.167.87.154 – 10.167.87.15410.167.87.154
2810.167.87.155/3210.167.87.155 – 10.167.87.15510.167.87.155
2910.167.87.156/3210.167.87.156 – 10.167.87.15610.167.87.156
3010.167.87.157/3210.167.87.157 – 10.167.87.15710.167.87.157
3110.167.87.158/3210.167.87.158 – 10.167.87.15810.167.87.158
3210.167.87.159/3210.167.87.159 – 10.167.87.15910.167.87.159
3310.167.87.160/3210.167.87.160 – 10.167.87.16010.167.87.160
3410.167.87.161/3210.167.87.161 – 10.167.87.16110.167.87.161
3510.167.87.162/3210.167.87.162 – 10.167.87.16210.167.87.162
3610.167.87.163/3210.167.87.163 – 10.167.87.16310.167.87.163
3710.167.87.164/3210.167.87.164 – 10.167.87.16410.167.87.164
3810.167.87.165/3210.167.87.165 – 10.167.87.16510.167.87.165
3910.167.87.166/3210.167.87.166 – 10.167.87.16610.167.87.166
4010.167.87.167/3210.167.87.167 – 10.167.87.16710.167.87.167
4110.167.87.168/3210.167.87.168 – 10.167.87.16810.167.87.168
4210.167.87.169/3210.167.87.169 – 10.167.87.16910.167.87.169
4310.167.87.170/3210.167.87.170 – 10.167.87.17010.167.87.170
4410.167.87.171/3210.167.87.171 – 10.167.87.17110.167.87.171
4510.167.87.172/3210.167.87.172 – 10.167.87.17210.167.87.172
4610.167.87.173/3210.167.87.173 – 10.167.87.17310.167.87.173
4710.167.87.174/3210.167.87.174 – 10.167.87.17410.167.87.174
4810.167.87.175/3210.167.87.175 – 10.167.87.17510.167.87.175
4910.167.87.176/3210.167.87.176 – 10.167.87.17610.167.87.176
5010.167.87.177/3210.167.87.177 – 10.167.87.17710.167.87.177
5110.167.87.178/3210.167.87.178 – 10.167.87.17810.167.87.178
5210.167.87.179/3210.167.87.179 – 10.167.87.17910.167.87.179
5310.167.87.180/3210.167.87.180 – 10.167.87.18010.167.87.180
5410.167.87.181/3210.167.87.181 – 10.167.87.18110.167.87.181
5510.167.87.182/3210.167.87.182 – 10.167.87.18210.167.87.182
5610.167.87.183/3210.167.87.183 – 10.167.87.18310.167.87.183
5710.167.87.184/3210.167.87.184 – 10.167.87.18410.167.87.184
5810.167.87.185/3210.167.87.185 – 10.167.87.18510.167.87.185
5910.167.87.186/3210.167.87.186 – 10.167.87.18610.167.87.186
6010.167.87.187/3210.167.87.187 – 10.167.87.18710.167.87.187
6110.167.87.188/3210.167.87.188 – 10.167.87.18810.167.87.188
6210.167.87.189/3210.167.87.189 – 10.167.87.18910.167.87.189
6310.167.87.190/3210.167.87.190 – 10.167.87.19010.167.87.190
6410.167.87.191/3210.167.87.191 – 10.167.87.19110.167.87.191
6510.167.87.192/3210.167.87.192 – 10.167.87.19210.167.87.192
6610.167.87.193/3210.167.87.193 – 10.167.87.19310.167.87.193
6710.167.87.194/3210.167.87.194 – 10.167.87.19410.167.87.194
6810.167.87.195/3210.167.87.195 – 10.167.87.19510.167.87.195
6910.167.87.196/3210.167.87.196 – 10.167.87.19610.167.87.196
7010.167.87.197/3210.167.87.197 – 10.167.87.19710.167.87.197
7110.167.87.198/3210.167.87.198 – 10.167.87.19810.167.87.198
7210.167.87.199/3210.167.87.199 – 10.167.87.19910.167.87.199
7310.167.87.200/3210.167.87.200 – 10.167.87.20010.167.87.200
7410.167.87.201/3210.167.87.201 – 10.167.87.20110.167.87.201
7510.167.87.202/3210.167.87.202 – 10.167.87.20210.167.87.202
7610.167.87.203/3210.167.87.203 – 10.167.87.20310.167.87.203
7710.167.87.204/3210.167.87.204 – 10.167.87.20410.167.87.204
7810.167.87.205/3210.167.87.205 – 10.167.87.20510.167.87.205
7910.167.87.206/3210.167.87.206 – 10.167.87.20610.167.87.206
8010.167.87.207/3210.167.87.207 – 10.167.87.20710.167.87.207
8110.167.87.208/3210.167.87.208 – 10.167.87.20810.167.87.208
8210.167.87.209/3210.167.87.209 – 10.167.87.20910.167.87.209
8310.167.87.210/3210.167.87.210 – 10.167.87.21010.167.87.210
8410.167.87.211/3210.167.87.211 – 10.167.87.21110.167.87.211
8510.167.87.212/3210.167.87.212 – 10.167.87.21210.167.87.212
8610.167.87.213/3210.167.87.213 – 10.167.87.21310.167.87.213
8710.167.87.214/3210.167.87.214 – 10.167.87.21410.167.87.214
8810.167.87.215/3210.167.87.215 – 10.167.87.21510.167.87.215
8910.167.87.216/3210.167.87.216 – 10.167.87.21610.167.87.216
9010.167.87.217/3210.167.87.217 – 10.167.87.21710.167.87.217
9110.167.87.218/3210.167.87.218 – 10.167.87.21810.167.87.218
9210.167.87.219/3210.167.87.219 – 10.167.87.21910.167.87.219
9310.167.87.220/3210.167.87.220 – 10.167.87.22010.167.87.220
9410.167.87.221/3210.167.87.221 – 10.167.87.22110.167.87.221
9510.167.87.222/3210.167.87.222 – 10.167.87.22210.167.87.222
9610.167.87.223/3210.167.87.223 – 10.167.87.22310.167.87.223
9710.167.87.224/3210.167.87.224 – 10.167.87.22410.167.87.224
9810.167.87.225/3210.167.87.225 – 10.167.87.22510.167.87.225
9910.167.87.226/3210.167.87.226 – 10.167.87.22610.167.87.226
10010.167.87.227/3210.167.87.227 – 10.167.87.22710.167.87.227
10110.167.87.228/3210.167.87.228 – 10.167.87.22810.167.87.228
10210.167.87.229/3210.167.87.229 – 10.167.87.22910.167.87.229
10310.167.87.230/3210.167.87.230 – 10.167.87.23010.167.87.230
10410.167.87.231/3210.167.87.231 – 10.167.87.23110.167.87.231
10510.167.87.232/3210.167.87.232 – 10.167.87.23210.167.87.232
10610.167.87.233/3210.167.87.233 – 10.167.87.23310.167.87.233
10710.167.87.234/3210.167.87.234 – 10.167.87.23410.167.87.234
10810.167.87.235/3210.167.87.235 – 10.167.87.23510.167.87.235
10910.167.87.236/3210.167.87.236 – 10.167.87.23610.167.87.236
11010.167.87.237/3210.167.87.237 – 10.167.87.23710.167.87.237
11110.167.87.238/3210.167.87.238 – 10.167.87.23810.167.87.238
11210.167.87.239/3210.167.87.239 – 10.167.87.23910.167.87.239
11310.167.87.240/3210.167.87.240 – 10.167.87.24010.167.87.240
11410.167.87.241/3210.167.87.241 – 10.167.87.24110.167.87.241
11510.167.87.242/3210.167.87.242 – 10.167.87.24210.167.87.242
11610.167.87.243/3210.167.87.243 – 10.167.87.24310.167.87.243
11710.167.87.244/3210.167.87.244 – 10.167.87.24410.167.87.244
11810.167.87.245/3210.167.87.245 – 10.167.87.24510.167.87.245
11910.167.87.246/3210.167.87.246 – 10.167.87.24610.167.87.246
12010.167.87.247/3210.167.87.247 – 10.167.87.24710.167.87.247
12110.167.87.248/3210.167.87.248 – 10.167.87.24810.167.87.248
12210.167.87.249/3210.167.87.249 – 10.167.87.24910.167.87.249
12310.167.87.250/3210.167.87.250 – 10.167.87.25010.167.87.250
12410.167.87.251/3210.167.87.251 – 10.167.87.25110.167.87.251
12510.167.87.252/3210.167.87.252 – 10.167.87.25210.167.87.252
12610.167.87.253/3210.167.87.253 – 10.167.87.25310.167.87.253
12710.167.87.254/3210.167.87.254 – 10.167.87.25410.167.87.254
12810.167.87.255/3210.167.87.255 – 10.167.87.25510.167.87.255
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 →