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)10.0.70.128/25
network10.0.70.128/25
broadcast10.0.70.255
first host10.0.70.129
last host10.0.70.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.0.70.128/25
address00001010.00000000.01000110.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000000.01000110.10000000
broadcast00001010.00000000.01000110.11111111
green = network part, grey = host part
hex0x0a004680
decimal167790208
reverse dns128.70.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:4680

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.70.128/3210.0.70.128 – 10.0.70.12810.0.70.128
210.0.70.129/3210.0.70.129 – 10.0.70.12910.0.70.129
310.0.70.130/3210.0.70.130 – 10.0.70.13010.0.70.130
410.0.70.131/3210.0.70.131 – 10.0.70.13110.0.70.131
510.0.70.132/3210.0.70.132 – 10.0.70.13210.0.70.132
610.0.70.133/3210.0.70.133 – 10.0.70.13310.0.70.133
710.0.70.134/3210.0.70.134 – 10.0.70.13410.0.70.134
810.0.70.135/3210.0.70.135 – 10.0.70.13510.0.70.135
910.0.70.136/3210.0.70.136 – 10.0.70.13610.0.70.136
1010.0.70.137/3210.0.70.137 – 10.0.70.13710.0.70.137
1110.0.70.138/3210.0.70.138 – 10.0.70.13810.0.70.138
1210.0.70.139/3210.0.70.139 – 10.0.70.13910.0.70.139
1310.0.70.140/3210.0.70.140 – 10.0.70.14010.0.70.140
1410.0.70.141/3210.0.70.141 – 10.0.70.14110.0.70.141
1510.0.70.142/3210.0.70.142 – 10.0.70.14210.0.70.142
1610.0.70.143/3210.0.70.143 – 10.0.70.14310.0.70.143
1710.0.70.144/3210.0.70.144 – 10.0.70.14410.0.70.144
1810.0.70.145/3210.0.70.145 – 10.0.70.14510.0.70.145
1910.0.70.146/3210.0.70.146 – 10.0.70.14610.0.70.146
2010.0.70.147/3210.0.70.147 – 10.0.70.14710.0.70.147
2110.0.70.148/3210.0.70.148 – 10.0.70.14810.0.70.148
2210.0.70.149/3210.0.70.149 – 10.0.70.14910.0.70.149
2310.0.70.150/3210.0.70.150 – 10.0.70.15010.0.70.150
2410.0.70.151/3210.0.70.151 – 10.0.70.15110.0.70.151
2510.0.70.152/3210.0.70.152 – 10.0.70.15210.0.70.152
2610.0.70.153/3210.0.70.153 – 10.0.70.15310.0.70.153
2710.0.70.154/3210.0.70.154 – 10.0.70.15410.0.70.154
2810.0.70.155/3210.0.70.155 – 10.0.70.15510.0.70.155
2910.0.70.156/3210.0.70.156 – 10.0.70.15610.0.70.156
3010.0.70.157/3210.0.70.157 – 10.0.70.15710.0.70.157
3110.0.70.158/3210.0.70.158 – 10.0.70.15810.0.70.158
3210.0.70.159/3210.0.70.159 – 10.0.70.15910.0.70.159
3310.0.70.160/3210.0.70.160 – 10.0.70.16010.0.70.160
3410.0.70.161/3210.0.70.161 – 10.0.70.16110.0.70.161
3510.0.70.162/3210.0.70.162 – 10.0.70.16210.0.70.162
3610.0.70.163/3210.0.70.163 – 10.0.70.16310.0.70.163
3710.0.70.164/3210.0.70.164 – 10.0.70.16410.0.70.164
3810.0.70.165/3210.0.70.165 – 10.0.70.16510.0.70.165
3910.0.70.166/3210.0.70.166 – 10.0.70.16610.0.70.166
4010.0.70.167/3210.0.70.167 – 10.0.70.16710.0.70.167
4110.0.70.168/3210.0.70.168 – 10.0.70.16810.0.70.168
4210.0.70.169/3210.0.70.169 – 10.0.70.16910.0.70.169
4310.0.70.170/3210.0.70.170 – 10.0.70.17010.0.70.170
4410.0.70.171/3210.0.70.171 – 10.0.70.17110.0.70.171
4510.0.70.172/3210.0.70.172 – 10.0.70.17210.0.70.172
4610.0.70.173/3210.0.70.173 – 10.0.70.17310.0.70.173
4710.0.70.174/3210.0.70.174 – 10.0.70.17410.0.70.174
4810.0.70.175/3210.0.70.175 – 10.0.70.17510.0.70.175
4910.0.70.176/3210.0.70.176 – 10.0.70.17610.0.70.176
5010.0.70.177/3210.0.70.177 – 10.0.70.17710.0.70.177
5110.0.70.178/3210.0.70.178 – 10.0.70.17810.0.70.178
5210.0.70.179/3210.0.70.179 – 10.0.70.17910.0.70.179
5310.0.70.180/3210.0.70.180 – 10.0.70.18010.0.70.180
5410.0.70.181/3210.0.70.181 – 10.0.70.18110.0.70.181
5510.0.70.182/3210.0.70.182 – 10.0.70.18210.0.70.182
5610.0.70.183/3210.0.70.183 – 10.0.70.18310.0.70.183
5710.0.70.184/3210.0.70.184 – 10.0.70.18410.0.70.184
5810.0.70.185/3210.0.70.185 – 10.0.70.18510.0.70.185
5910.0.70.186/3210.0.70.186 – 10.0.70.18610.0.70.186
6010.0.70.187/3210.0.70.187 – 10.0.70.18710.0.70.187
6110.0.70.188/3210.0.70.188 – 10.0.70.18810.0.70.188
6210.0.70.189/3210.0.70.189 – 10.0.70.18910.0.70.189
6310.0.70.190/3210.0.70.190 – 10.0.70.19010.0.70.190
6410.0.70.191/3210.0.70.191 – 10.0.70.19110.0.70.191
6510.0.70.192/3210.0.70.192 – 10.0.70.19210.0.70.192
6610.0.70.193/3210.0.70.193 – 10.0.70.19310.0.70.193
6710.0.70.194/3210.0.70.194 – 10.0.70.19410.0.70.194
6810.0.70.195/3210.0.70.195 – 10.0.70.19510.0.70.195
6910.0.70.196/3210.0.70.196 – 10.0.70.19610.0.70.196
7010.0.70.197/3210.0.70.197 – 10.0.70.19710.0.70.197
7110.0.70.198/3210.0.70.198 – 10.0.70.19810.0.70.198
7210.0.70.199/3210.0.70.199 – 10.0.70.19910.0.70.199
7310.0.70.200/3210.0.70.200 – 10.0.70.20010.0.70.200
7410.0.70.201/3210.0.70.201 – 10.0.70.20110.0.70.201
7510.0.70.202/3210.0.70.202 – 10.0.70.20210.0.70.202
7610.0.70.203/3210.0.70.203 – 10.0.70.20310.0.70.203
7710.0.70.204/3210.0.70.204 – 10.0.70.20410.0.70.204
7810.0.70.205/3210.0.70.205 – 10.0.70.20510.0.70.205
7910.0.70.206/3210.0.70.206 – 10.0.70.20610.0.70.206
8010.0.70.207/3210.0.70.207 – 10.0.70.20710.0.70.207
8110.0.70.208/3210.0.70.208 – 10.0.70.20810.0.70.208
8210.0.70.209/3210.0.70.209 – 10.0.70.20910.0.70.209
8310.0.70.210/3210.0.70.210 – 10.0.70.21010.0.70.210
8410.0.70.211/3210.0.70.211 – 10.0.70.21110.0.70.211
8510.0.70.212/3210.0.70.212 – 10.0.70.21210.0.70.212
8610.0.70.213/3210.0.70.213 – 10.0.70.21310.0.70.213
8710.0.70.214/3210.0.70.214 – 10.0.70.21410.0.70.214
8810.0.70.215/3210.0.70.215 – 10.0.70.21510.0.70.215
8910.0.70.216/3210.0.70.216 – 10.0.70.21610.0.70.216
9010.0.70.217/3210.0.70.217 – 10.0.70.21710.0.70.217
9110.0.70.218/3210.0.70.218 – 10.0.70.21810.0.70.218
9210.0.70.219/3210.0.70.219 – 10.0.70.21910.0.70.219
9310.0.70.220/3210.0.70.220 – 10.0.70.22010.0.70.220
9410.0.70.221/3210.0.70.221 – 10.0.70.22110.0.70.221
9510.0.70.222/3210.0.70.222 – 10.0.70.22210.0.70.222
9610.0.70.223/3210.0.70.223 – 10.0.70.22310.0.70.223
9710.0.70.224/3210.0.70.224 – 10.0.70.22410.0.70.224
9810.0.70.225/3210.0.70.225 – 10.0.70.22510.0.70.225
9910.0.70.226/3210.0.70.226 – 10.0.70.22610.0.70.226
10010.0.70.227/3210.0.70.227 – 10.0.70.22710.0.70.227
10110.0.70.228/3210.0.70.228 – 10.0.70.22810.0.70.228
10210.0.70.229/3210.0.70.229 – 10.0.70.22910.0.70.229
10310.0.70.230/3210.0.70.230 – 10.0.70.23010.0.70.230
10410.0.70.231/3210.0.70.231 – 10.0.70.23110.0.70.231
10510.0.70.232/3210.0.70.232 – 10.0.70.23210.0.70.232
10610.0.70.233/3210.0.70.233 – 10.0.70.23310.0.70.233
10710.0.70.234/3210.0.70.234 – 10.0.70.23410.0.70.234
10810.0.70.235/3210.0.70.235 – 10.0.70.23510.0.70.235
10910.0.70.236/3210.0.70.236 – 10.0.70.23610.0.70.236
11010.0.70.237/3210.0.70.237 – 10.0.70.23710.0.70.237
11110.0.70.238/3210.0.70.238 – 10.0.70.23810.0.70.238
11210.0.70.239/3210.0.70.239 – 10.0.70.23910.0.70.239
11310.0.70.240/3210.0.70.240 – 10.0.70.24010.0.70.240
11410.0.70.241/3210.0.70.241 – 10.0.70.24110.0.70.241
11510.0.70.242/3210.0.70.242 – 10.0.70.24210.0.70.242
11610.0.70.243/3210.0.70.243 – 10.0.70.24310.0.70.243
11710.0.70.244/3210.0.70.244 – 10.0.70.24410.0.70.244
11810.0.70.245/3210.0.70.245 – 10.0.70.24510.0.70.245
11910.0.70.246/3210.0.70.246 – 10.0.70.24610.0.70.246
12010.0.70.247/3210.0.70.247 – 10.0.70.24710.0.70.247
12110.0.70.248/3210.0.70.248 – 10.0.70.24810.0.70.248
12210.0.70.249/3210.0.70.249 – 10.0.70.24910.0.70.249
12310.0.70.250/3210.0.70.250 – 10.0.70.25010.0.70.250
12410.0.70.251/3210.0.70.251 – 10.0.70.25110.0.70.251
12510.0.70.252/3210.0.70.252 – 10.0.70.25210.0.70.252
12610.0.70.253/3210.0.70.253 – 10.0.70.25310.0.70.253
12710.0.70.254/3210.0.70.254 – 10.0.70.25410.0.70.254
12810.0.70.255/3210.0.70.255 – 10.0.70.25510.0.70.255
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 →