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)10.78.71.128/25
network10.78.71.128/25
broadcast10.78.71.255
first host10.78.71.129
last host10.78.71.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.71.128/25
address00001010.01001110.01000111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.01000111.10000000
broadcast00001010.01001110.01000111.11111111
green = network part, grey = host part
hex0x0a4e4780
decimal172902272
reverse dns128.71.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4780

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.71.128/3210.78.71.128 – 10.78.71.12810.78.71.128
210.78.71.129/3210.78.71.129 – 10.78.71.12910.78.71.129
310.78.71.130/3210.78.71.130 – 10.78.71.13010.78.71.130
410.78.71.131/3210.78.71.131 – 10.78.71.13110.78.71.131
510.78.71.132/3210.78.71.132 – 10.78.71.13210.78.71.132
610.78.71.133/3210.78.71.133 – 10.78.71.13310.78.71.133
710.78.71.134/3210.78.71.134 – 10.78.71.13410.78.71.134
810.78.71.135/3210.78.71.135 – 10.78.71.13510.78.71.135
910.78.71.136/3210.78.71.136 – 10.78.71.13610.78.71.136
1010.78.71.137/3210.78.71.137 – 10.78.71.13710.78.71.137
1110.78.71.138/3210.78.71.138 – 10.78.71.13810.78.71.138
1210.78.71.139/3210.78.71.139 – 10.78.71.13910.78.71.139
1310.78.71.140/3210.78.71.140 – 10.78.71.14010.78.71.140
1410.78.71.141/3210.78.71.141 – 10.78.71.14110.78.71.141
1510.78.71.142/3210.78.71.142 – 10.78.71.14210.78.71.142
1610.78.71.143/3210.78.71.143 – 10.78.71.14310.78.71.143
1710.78.71.144/3210.78.71.144 – 10.78.71.14410.78.71.144
1810.78.71.145/3210.78.71.145 – 10.78.71.14510.78.71.145
1910.78.71.146/3210.78.71.146 – 10.78.71.14610.78.71.146
2010.78.71.147/3210.78.71.147 – 10.78.71.14710.78.71.147
2110.78.71.148/3210.78.71.148 – 10.78.71.14810.78.71.148
2210.78.71.149/3210.78.71.149 – 10.78.71.14910.78.71.149
2310.78.71.150/3210.78.71.150 – 10.78.71.15010.78.71.150
2410.78.71.151/3210.78.71.151 – 10.78.71.15110.78.71.151
2510.78.71.152/3210.78.71.152 – 10.78.71.15210.78.71.152
2610.78.71.153/3210.78.71.153 – 10.78.71.15310.78.71.153
2710.78.71.154/3210.78.71.154 – 10.78.71.15410.78.71.154
2810.78.71.155/3210.78.71.155 – 10.78.71.15510.78.71.155
2910.78.71.156/3210.78.71.156 – 10.78.71.15610.78.71.156
3010.78.71.157/3210.78.71.157 – 10.78.71.15710.78.71.157
3110.78.71.158/3210.78.71.158 – 10.78.71.15810.78.71.158
3210.78.71.159/3210.78.71.159 – 10.78.71.15910.78.71.159
3310.78.71.160/3210.78.71.160 – 10.78.71.16010.78.71.160
3410.78.71.161/3210.78.71.161 – 10.78.71.16110.78.71.161
3510.78.71.162/3210.78.71.162 – 10.78.71.16210.78.71.162
3610.78.71.163/3210.78.71.163 – 10.78.71.16310.78.71.163
3710.78.71.164/3210.78.71.164 – 10.78.71.16410.78.71.164
3810.78.71.165/3210.78.71.165 – 10.78.71.16510.78.71.165
3910.78.71.166/3210.78.71.166 – 10.78.71.16610.78.71.166
4010.78.71.167/3210.78.71.167 – 10.78.71.16710.78.71.167
4110.78.71.168/3210.78.71.168 – 10.78.71.16810.78.71.168
4210.78.71.169/3210.78.71.169 – 10.78.71.16910.78.71.169
4310.78.71.170/3210.78.71.170 – 10.78.71.17010.78.71.170
4410.78.71.171/3210.78.71.171 – 10.78.71.17110.78.71.171
4510.78.71.172/3210.78.71.172 – 10.78.71.17210.78.71.172
4610.78.71.173/3210.78.71.173 – 10.78.71.17310.78.71.173
4710.78.71.174/3210.78.71.174 – 10.78.71.17410.78.71.174
4810.78.71.175/3210.78.71.175 – 10.78.71.17510.78.71.175
4910.78.71.176/3210.78.71.176 – 10.78.71.17610.78.71.176
5010.78.71.177/3210.78.71.177 – 10.78.71.17710.78.71.177
5110.78.71.178/3210.78.71.178 – 10.78.71.17810.78.71.178
5210.78.71.179/3210.78.71.179 – 10.78.71.17910.78.71.179
5310.78.71.180/3210.78.71.180 – 10.78.71.18010.78.71.180
5410.78.71.181/3210.78.71.181 – 10.78.71.18110.78.71.181
5510.78.71.182/3210.78.71.182 – 10.78.71.18210.78.71.182
5610.78.71.183/3210.78.71.183 – 10.78.71.18310.78.71.183
5710.78.71.184/3210.78.71.184 – 10.78.71.18410.78.71.184
5810.78.71.185/3210.78.71.185 – 10.78.71.18510.78.71.185
5910.78.71.186/3210.78.71.186 – 10.78.71.18610.78.71.186
6010.78.71.187/3210.78.71.187 – 10.78.71.18710.78.71.187
6110.78.71.188/3210.78.71.188 – 10.78.71.18810.78.71.188
6210.78.71.189/3210.78.71.189 – 10.78.71.18910.78.71.189
6310.78.71.190/3210.78.71.190 – 10.78.71.19010.78.71.190
6410.78.71.191/3210.78.71.191 – 10.78.71.19110.78.71.191
6510.78.71.192/3210.78.71.192 – 10.78.71.19210.78.71.192
6610.78.71.193/3210.78.71.193 – 10.78.71.19310.78.71.193
6710.78.71.194/3210.78.71.194 – 10.78.71.19410.78.71.194
6810.78.71.195/3210.78.71.195 – 10.78.71.19510.78.71.195
6910.78.71.196/3210.78.71.196 – 10.78.71.19610.78.71.196
7010.78.71.197/3210.78.71.197 – 10.78.71.19710.78.71.197
7110.78.71.198/3210.78.71.198 – 10.78.71.19810.78.71.198
7210.78.71.199/3210.78.71.199 – 10.78.71.19910.78.71.199
7310.78.71.200/3210.78.71.200 – 10.78.71.20010.78.71.200
7410.78.71.201/3210.78.71.201 – 10.78.71.20110.78.71.201
7510.78.71.202/3210.78.71.202 – 10.78.71.20210.78.71.202
7610.78.71.203/3210.78.71.203 – 10.78.71.20310.78.71.203
7710.78.71.204/3210.78.71.204 – 10.78.71.20410.78.71.204
7810.78.71.205/3210.78.71.205 – 10.78.71.20510.78.71.205
7910.78.71.206/3210.78.71.206 – 10.78.71.20610.78.71.206
8010.78.71.207/3210.78.71.207 – 10.78.71.20710.78.71.207
8110.78.71.208/3210.78.71.208 – 10.78.71.20810.78.71.208
8210.78.71.209/3210.78.71.209 – 10.78.71.20910.78.71.209
8310.78.71.210/3210.78.71.210 – 10.78.71.21010.78.71.210
8410.78.71.211/3210.78.71.211 – 10.78.71.21110.78.71.211
8510.78.71.212/3210.78.71.212 – 10.78.71.21210.78.71.212
8610.78.71.213/3210.78.71.213 – 10.78.71.21310.78.71.213
8710.78.71.214/3210.78.71.214 – 10.78.71.21410.78.71.214
8810.78.71.215/3210.78.71.215 – 10.78.71.21510.78.71.215
8910.78.71.216/3210.78.71.216 – 10.78.71.21610.78.71.216
9010.78.71.217/3210.78.71.217 – 10.78.71.21710.78.71.217
9110.78.71.218/3210.78.71.218 – 10.78.71.21810.78.71.218
9210.78.71.219/3210.78.71.219 – 10.78.71.21910.78.71.219
9310.78.71.220/3210.78.71.220 – 10.78.71.22010.78.71.220
9410.78.71.221/3210.78.71.221 – 10.78.71.22110.78.71.221
9510.78.71.222/3210.78.71.222 – 10.78.71.22210.78.71.222
9610.78.71.223/3210.78.71.223 – 10.78.71.22310.78.71.223
9710.78.71.224/3210.78.71.224 – 10.78.71.22410.78.71.224
9810.78.71.225/3210.78.71.225 – 10.78.71.22510.78.71.225
9910.78.71.226/3210.78.71.226 – 10.78.71.22610.78.71.226
10010.78.71.227/3210.78.71.227 – 10.78.71.22710.78.71.227
10110.78.71.228/3210.78.71.228 – 10.78.71.22810.78.71.228
10210.78.71.229/3210.78.71.229 – 10.78.71.22910.78.71.229
10310.78.71.230/3210.78.71.230 – 10.78.71.23010.78.71.230
10410.78.71.231/3210.78.71.231 – 10.78.71.23110.78.71.231
10510.78.71.232/3210.78.71.232 – 10.78.71.23210.78.71.232
10610.78.71.233/3210.78.71.233 – 10.78.71.23310.78.71.233
10710.78.71.234/3210.78.71.234 – 10.78.71.23410.78.71.234
10810.78.71.235/3210.78.71.235 – 10.78.71.23510.78.71.235
10910.78.71.236/3210.78.71.236 – 10.78.71.23610.78.71.236
11010.78.71.237/3210.78.71.237 – 10.78.71.23710.78.71.237
11110.78.71.238/3210.78.71.238 – 10.78.71.23810.78.71.238
11210.78.71.239/3210.78.71.239 – 10.78.71.23910.78.71.239
11310.78.71.240/3210.78.71.240 – 10.78.71.24010.78.71.240
11410.78.71.241/3210.78.71.241 – 10.78.71.24110.78.71.241
11510.78.71.242/3210.78.71.242 – 10.78.71.24210.78.71.242
11610.78.71.243/3210.78.71.243 – 10.78.71.24310.78.71.243
11710.78.71.244/3210.78.71.244 – 10.78.71.24410.78.71.244
11810.78.71.245/3210.78.71.245 – 10.78.71.24510.78.71.245
11910.78.71.246/3210.78.71.246 – 10.78.71.24610.78.71.246
12010.78.71.247/3210.78.71.247 – 10.78.71.24710.78.71.247
12110.78.71.248/3210.78.71.248 – 10.78.71.24810.78.71.248
12210.78.71.249/3210.78.71.249 – 10.78.71.24910.78.71.249
12310.78.71.250/3210.78.71.250 – 10.78.71.25010.78.71.250
12410.78.71.251/3210.78.71.251 – 10.78.71.25110.78.71.251
12510.78.71.252/3210.78.71.252 – 10.78.71.25210.78.71.252
12610.78.71.253/3210.78.71.253 – 10.78.71.25310.78.71.253
12710.78.71.254/3210.78.71.254 – 10.78.71.25410.78.71.254
12810.78.71.255/3210.78.71.255 – 10.78.71.25510.78.71.255
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 →