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)10.232.3.128/25
network10.232.3.128/25
broadcast10.232.3.255
first host10.232.3.129
last host10.232.3.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.232.3.128/25
address00001010.11101000.00000011.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.11101000.00000011.10000000
broadcast00001010.11101000.00000011.11111111
green = network part, grey = host part
hex0x0ae80380
decimal182977408
reverse dns128.3.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:380

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.232.3.128/3210.232.3.128 – 10.232.3.12810.232.3.128
210.232.3.129/3210.232.3.129 – 10.232.3.12910.232.3.129
310.232.3.130/3210.232.3.130 – 10.232.3.13010.232.3.130
410.232.3.131/3210.232.3.131 – 10.232.3.13110.232.3.131
510.232.3.132/3210.232.3.132 – 10.232.3.13210.232.3.132
610.232.3.133/3210.232.3.133 – 10.232.3.13310.232.3.133
710.232.3.134/3210.232.3.134 – 10.232.3.13410.232.3.134
810.232.3.135/3210.232.3.135 – 10.232.3.13510.232.3.135
910.232.3.136/3210.232.3.136 – 10.232.3.13610.232.3.136
1010.232.3.137/3210.232.3.137 – 10.232.3.13710.232.3.137
1110.232.3.138/3210.232.3.138 – 10.232.3.13810.232.3.138
1210.232.3.139/3210.232.3.139 – 10.232.3.13910.232.3.139
1310.232.3.140/3210.232.3.140 – 10.232.3.14010.232.3.140
1410.232.3.141/3210.232.3.141 – 10.232.3.14110.232.3.141
1510.232.3.142/3210.232.3.142 – 10.232.3.14210.232.3.142
1610.232.3.143/3210.232.3.143 – 10.232.3.14310.232.3.143
1710.232.3.144/3210.232.3.144 – 10.232.3.14410.232.3.144
1810.232.3.145/3210.232.3.145 – 10.232.3.14510.232.3.145
1910.232.3.146/3210.232.3.146 – 10.232.3.14610.232.3.146
2010.232.3.147/3210.232.3.147 – 10.232.3.14710.232.3.147
2110.232.3.148/3210.232.3.148 – 10.232.3.14810.232.3.148
2210.232.3.149/3210.232.3.149 – 10.232.3.14910.232.3.149
2310.232.3.150/3210.232.3.150 – 10.232.3.15010.232.3.150
2410.232.3.151/3210.232.3.151 – 10.232.3.15110.232.3.151
2510.232.3.152/3210.232.3.152 – 10.232.3.15210.232.3.152
2610.232.3.153/3210.232.3.153 – 10.232.3.15310.232.3.153
2710.232.3.154/3210.232.3.154 – 10.232.3.15410.232.3.154
2810.232.3.155/3210.232.3.155 – 10.232.3.15510.232.3.155
2910.232.3.156/3210.232.3.156 – 10.232.3.15610.232.3.156
3010.232.3.157/3210.232.3.157 – 10.232.3.15710.232.3.157
3110.232.3.158/3210.232.3.158 – 10.232.3.15810.232.3.158
3210.232.3.159/3210.232.3.159 – 10.232.3.15910.232.3.159
3310.232.3.160/3210.232.3.160 – 10.232.3.16010.232.3.160
3410.232.3.161/3210.232.3.161 – 10.232.3.16110.232.3.161
3510.232.3.162/3210.232.3.162 – 10.232.3.16210.232.3.162
3610.232.3.163/3210.232.3.163 – 10.232.3.16310.232.3.163
3710.232.3.164/3210.232.3.164 – 10.232.3.16410.232.3.164
3810.232.3.165/3210.232.3.165 – 10.232.3.16510.232.3.165
3910.232.3.166/3210.232.3.166 – 10.232.3.16610.232.3.166
4010.232.3.167/3210.232.3.167 – 10.232.3.16710.232.3.167
4110.232.3.168/3210.232.3.168 – 10.232.3.16810.232.3.168
4210.232.3.169/3210.232.3.169 – 10.232.3.16910.232.3.169
4310.232.3.170/3210.232.3.170 – 10.232.3.17010.232.3.170
4410.232.3.171/3210.232.3.171 – 10.232.3.17110.232.3.171
4510.232.3.172/3210.232.3.172 – 10.232.3.17210.232.3.172
4610.232.3.173/3210.232.3.173 – 10.232.3.17310.232.3.173
4710.232.3.174/3210.232.3.174 – 10.232.3.17410.232.3.174
4810.232.3.175/3210.232.3.175 – 10.232.3.17510.232.3.175
4910.232.3.176/3210.232.3.176 – 10.232.3.17610.232.3.176
5010.232.3.177/3210.232.3.177 – 10.232.3.17710.232.3.177
5110.232.3.178/3210.232.3.178 – 10.232.3.17810.232.3.178
5210.232.3.179/3210.232.3.179 – 10.232.3.17910.232.3.179
5310.232.3.180/3210.232.3.180 – 10.232.3.18010.232.3.180
5410.232.3.181/3210.232.3.181 – 10.232.3.18110.232.3.181
5510.232.3.182/3210.232.3.182 – 10.232.3.18210.232.3.182
5610.232.3.183/3210.232.3.183 – 10.232.3.18310.232.3.183
5710.232.3.184/3210.232.3.184 – 10.232.3.18410.232.3.184
5810.232.3.185/3210.232.3.185 – 10.232.3.18510.232.3.185
5910.232.3.186/3210.232.3.186 – 10.232.3.18610.232.3.186
6010.232.3.187/3210.232.3.187 – 10.232.3.18710.232.3.187
6110.232.3.188/3210.232.3.188 – 10.232.3.18810.232.3.188
6210.232.3.189/3210.232.3.189 – 10.232.3.18910.232.3.189
6310.232.3.190/3210.232.3.190 – 10.232.3.19010.232.3.190
6410.232.3.191/3210.232.3.191 – 10.232.3.19110.232.3.191
6510.232.3.192/3210.232.3.192 – 10.232.3.19210.232.3.192
6610.232.3.193/3210.232.3.193 – 10.232.3.19310.232.3.193
6710.232.3.194/3210.232.3.194 – 10.232.3.19410.232.3.194
6810.232.3.195/3210.232.3.195 – 10.232.3.19510.232.3.195
6910.232.3.196/3210.232.3.196 – 10.232.3.19610.232.3.196
7010.232.3.197/3210.232.3.197 – 10.232.3.19710.232.3.197
7110.232.3.198/3210.232.3.198 – 10.232.3.19810.232.3.198
7210.232.3.199/3210.232.3.199 – 10.232.3.19910.232.3.199
7310.232.3.200/3210.232.3.200 – 10.232.3.20010.232.3.200
7410.232.3.201/3210.232.3.201 – 10.232.3.20110.232.3.201
7510.232.3.202/3210.232.3.202 – 10.232.3.20210.232.3.202
7610.232.3.203/3210.232.3.203 – 10.232.3.20310.232.3.203
7710.232.3.204/3210.232.3.204 – 10.232.3.20410.232.3.204
7810.232.3.205/3210.232.3.205 – 10.232.3.20510.232.3.205
7910.232.3.206/3210.232.3.206 – 10.232.3.20610.232.3.206
8010.232.3.207/3210.232.3.207 – 10.232.3.20710.232.3.207
8110.232.3.208/3210.232.3.208 – 10.232.3.20810.232.3.208
8210.232.3.209/3210.232.3.209 – 10.232.3.20910.232.3.209
8310.232.3.210/3210.232.3.210 – 10.232.3.21010.232.3.210
8410.232.3.211/3210.232.3.211 – 10.232.3.21110.232.3.211
8510.232.3.212/3210.232.3.212 – 10.232.3.21210.232.3.212
8610.232.3.213/3210.232.3.213 – 10.232.3.21310.232.3.213
8710.232.3.214/3210.232.3.214 – 10.232.3.21410.232.3.214
8810.232.3.215/3210.232.3.215 – 10.232.3.21510.232.3.215
8910.232.3.216/3210.232.3.216 – 10.232.3.21610.232.3.216
9010.232.3.217/3210.232.3.217 – 10.232.3.21710.232.3.217
9110.232.3.218/3210.232.3.218 – 10.232.3.21810.232.3.218
9210.232.3.219/3210.232.3.219 – 10.232.3.21910.232.3.219
9310.232.3.220/3210.232.3.220 – 10.232.3.22010.232.3.220
9410.232.3.221/3210.232.3.221 – 10.232.3.22110.232.3.221
9510.232.3.222/3210.232.3.222 – 10.232.3.22210.232.3.222
9610.232.3.223/3210.232.3.223 – 10.232.3.22310.232.3.223
9710.232.3.224/3210.232.3.224 – 10.232.3.22410.232.3.224
9810.232.3.225/3210.232.3.225 – 10.232.3.22510.232.3.225
9910.232.3.226/3210.232.3.226 – 10.232.3.22610.232.3.226
10010.232.3.227/3210.232.3.227 – 10.232.3.22710.232.3.227
10110.232.3.228/3210.232.3.228 – 10.232.3.22810.232.3.228
10210.232.3.229/3210.232.3.229 – 10.232.3.22910.232.3.229
10310.232.3.230/3210.232.3.230 – 10.232.3.23010.232.3.230
10410.232.3.231/3210.232.3.231 – 10.232.3.23110.232.3.231
10510.232.3.232/3210.232.3.232 – 10.232.3.23210.232.3.232
10610.232.3.233/3210.232.3.233 – 10.232.3.23310.232.3.233
10710.232.3.234/3210.232.3.234 – 10.232.3.23410.232.3.234
10810.232.3.235/3210.232.3.235 – 10.232.3.23510.232.3.235
10910.232.3.236/3210.232.3.236 – 10.232.3.23610.232.3.236
11010.232.3.237/3210.232.3.237 – 10.232.3.23710.232.3.237
11110.232.3.238/3210.232.3.238 – 10.232.3.23810.232.3.238
11210.232.3.239/3210.232.3.239 – 10.232.3.23910.232.3.239
11310.232.3.240/3210.232.3.240 – 10.232.3.24010.232.3.240
11410.232.3.241/3210.232.3.241 – 10.232.3.24110.232.3.241
11510.232.3.242/3210.232.3.242 – 10.232.3.24210.232.3.242
11610.232.3.243/3210.232.3.243 – 10.232.3.24310.232.3.243
11710.232.3.244/3210.232.3.244 – 10.232.3.24410.232.3.244
11810.232.3.245/3210.232.3.245 – 10.232.3.24510.232.3.245
11910.232.3.246/3210.232.3.246 – 10.232.3.24610.232.3.246
12010.232.3.247/3210.232.3.247 – 10.232.3.24710.232.3.247
12110.232.3.248/3210.232.3.248 – 10.232.3.24810.232.3.248
12210.232.3.249/3210.232.3.249 – 10.232.3.24910.232.3.249
12310.232.3.250/3210.232.3.250 – 10.232.3.25010.232.3.250
12410.232.3.251/3210.232.3.251 – 10.232.3.25110.232.3.251
12510.232.3.252/3210.232.3.252 – 10.232.3.25210.232.3.252
12610.232.3.253/3210.232.3.253 – 10.232.3.25310.232.3.253
12710.232.3.254/3210.232.3.254 – 10.232.3.25410.232.3.254
12810.232.3.255/3210.232.3.255 – 10.232.3.25510.232.3.255
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 →