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)10.2.32.128/25
network10.2.32.128/25
broadcast10.2.32.255
first host10.2.32.129
last host10.2.32.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.32.128/25
address00001010.00000010.00100000.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.00100000.10000000
broadcast00001010.00000010.00100000.11111111
green = network part, grey = host part
hex0x0a022080
decimal167911552
reverse dns128.32.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:2080

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.32.128/3210.2.32.128 – 10.2.32.12810.2.32.128
210.2.32.129/3210.2.32.129 – 10.2.32.12910.2.32.129
310.2.32.130/3210.2.32.130 – 10.2.32.13010.2.32.130
410.2.32.131/3210.2.32.131 – 10.2.32.13110.2.32.131
510.2.32.132/3210.2.32.132 – 10.2.32.13210.2.32.132
610.2.32.133/3210.2.32.133 – 10.2.32.13310.2.32.133
710.2.32.134/3210.2.32.134 – 10.2.32.13410.2.32.134
810.2.32.135/3210.2.32.135 – 10.2.32.13510.2.32.135
910.2.32.136/3210.2.32.136 – 10.2.32.13610.2.32.136
1010.2.32.137/3210.2.32.137 – 10.2.32.13710.2.32.137
1110.2.32.138/3210.2.32.138 – 10.2.32.13810.2.32.138
1210.2.32.139/3210.2.32.139 – 10.2.32.13910.2.32.139
1310.2.32.140/3210.2.32.140 – 10.2.32.14010.2.32.140
1410.2.32.141/3210.2.32.141 – 10.2.32.14110.2.32.141
1510.2.32.142/3210.2.32.142 – 10.2.32.14210.2.32.142
1610.2.32.143/3210.2.32.143 – 10.2.32.14310.2.32.143
1710.2.32.144/3210.2.32.144 – 10.2.32.14410.2.32.144
1810.2.32.145/3210.2.32.145 – 10.2.32.14510.2.32.145
1910.2.32.146/3210.2.32.146 – 10.2.32.14610.2.32.146
2010.2.32.147/3210.2.32.147 – 10.2.32.14710.2.32.147
2110.2.32.148/3210.2.32.148 – 10.2.32.14810.2.32.148
2210.2.32.149/3210.2.32.149 – 10.2.32.14910.2.32.149
2310.2.32.150/3210.2.32.150 – 10.2.32.15010.2.32.150
2410.2.32.151/3210.2.32.151 – 10.2.32.15110.2.32.151
2510.2.32.152/3210.2.32.152 – 10.2.32.15210.2.32.152
2610.2.32.153/3210.2.32.153 – 10.2.32.15310.2.32.153
2710.2.32.154/3210.2.32.154 – 10.2.32.15410.2.32.154
2810.2.32.155/3210.2.32.155 – 10.2.32.15510.2.32.155
2910.2.32.156/3210.2.32.156 – 10.2.32.15610.2.32.156
3010.2.32.157/3210.2.32.157 – 10.2.32.15710.2.32.157
3110.2.32.158/3210.2.32.158 – 10.2.32.15810.2.32.158
3210.2.32.159/3210.2.32.159 – 10.2.32.15910.2.32.159
3310.2.32.160/3210.2.32.160 – 10.2.32.16010.2.32.160
3410.2.32.161/3210.2.32.161 – 10.2.32.16110.2.32.161
3510.2.32.162/3210.2.32.162 – 10.2.32.16210.2.32.162
3610.2.32.163/3210.2.32.163 – 10.2.32.16310.2.32.163
3710.2.32.164/3210.2.32.164 – 10.2.32.16410.2.32.164
3810.2.32.165/3210.2.32.165 – 10.2.32.16510.2.32.165
3910.2.32.166/3210.2.32.166 – 10.2.32.16610.2.32.166
4010.2.32.167/3210.2.32.167 – 10.2.32.16710.2.32.167
4110.2.32.168/3210.2.32.168 – 10.2.32.16810.2.32.168
4210.2.32.169/3210.2.32.169 – 10.2.32.16910.2.32.169
4310.2.32.170/3210.2.32.170 – 10.2.32.17010.2.32.170
4410.2.32.171/3210.2.32.171 – 10.2.32.17110.2.32.171
4510.2.32.172/3210.2.32.172 – 10.2.32.17210.2.32.172
4610.2.32.173/3210.2.32.173 – 10.2.32.17310.2.32.173
4710.2.32.174/3210.2.32.174 – 10.2.32.17410.2.32.174
4810.2.32.175/3210.2.32.175 – 10.2.32.17510.2.32.175
4910.2.32.176/3210.2.32.176 – 10.2.32.17610.2.32.176
5010.2.32.177/3210.2.32.177 – 10.2.32.17710.2.32.177
5110.2.32.178/3210.2.32.178 – 10.2.32.17810.2.32.178
5210.2.32.179/3210.2.32.179 – 10.2.32.17910.2.32.179
5310.2.32.180/3210.2.32.180 – 10.2.32.18010.2.32.180
5410.2.32.181/3210.2.32.181 – 10.2.32.18110.2.32.181
5510.2.32.182/3210.2.32.182 – 10.2.32.18210.2.32.182
5610.2.32.183/3210.2.32.183 – 10.2.32.18310.2.32.183
5710.2.32.184/3210.2.32.184 – 10.2.32.18410.2.32.184
5810.2.32.185/3210.2.32.185 – 10.2.32.18510.2.32.185
5910.2.32.186/3210.2.32.186 – 10.2.32.18610.2.32.186
6010.2.32.187/3210.2.32.187 – 10.2.32.18710.2.32.187
6110.2.32.188/3210.2.32.188 – 10.2.32.18810.2.32.188
6210.2.32.189/3210.2.32.189 – 10.2.32.18910.2.32.189
6310.2.32.190/3210.2.32.190 – 10.2.32.19010.2.32.190
6410.2.32.191/3210.2.32.191 – 10.2.32.19110.2.32.191
6510.2.32.192/3210.2.32.192 – 10.2.32.19210.2.32.192
6610.2.32.193/3210.2.32.193 – 10.2.32.19310.2.32.193
6710.2.32.194/3210.2.32.194 – 10.2.32.19410.2.32.194
6810.2.32.195/3210.2.32.195 – 10.2.32.19510.2.32.195
6910.2.32.196/3210.2.32.196 – 10.2.32.19610.2.32.196
7010.2.32.197/3210.2.32.197 – 10.2.32.19710.2.32.197
7110.2.32.198/3210.2.32.198 – 10.2.32.19810.2.32.198
7210.2.32.199/3210.2.32.199 – 10.2.32.19910.2.32.199
7310.2.32.200/3210.2.32.200 – 10.2.32.20010.2.32.200
7410.2.32.201/3210.2.32.201 – 10.2.32.20110.2.32.201
7510.2.32.202/3210.2.32.202 – 10.2.32.20210.2.32.202
7610.2.32.203/3210.2.32.203 – 10.2.32.20310.2.32.203
7710.2.32.204/3210.2.32.204 – 10.2.32.20410.2.32.204
7810.2.32.205/3210.2.32.205 – 10.2.32.20510.2.32.205
7910.2.32.206/3210.2.32.206 – 10.2.32.20610.2.32.206
8010.2.32.207/3210.2.32.207 – 10.2.32.20710.2.32.207
8110.2.32.208/3210.2.32.208 – 10.2.32.20810.2.32.208
8210.2.32.209/3210.2.32.209 – 10.2.32.20910.2.32.209
8310.2.32.210/3210.2.32.210 – 10.2.32.21010.2.32.210
8410.2.32.211/3210.2.32.211 – 10.2.32.21110.2.32.211
8510.2.32.212/3210.2.32.212 – 10.2.32.21210.2.32.212
8610.2.32.213/3210.2.32.213 – 10.2.32.21310.2.32.213
8710.2.32.214/3210.2.32.214 – 10.2.32.21410.2.32.214
8810.2.32.215/3210.2.32.215 – 10.2.32.21510.2.32.215
8910.2.32.216/3210.2.32.216 – 10.2.32.21610.2.32.216
9010.2.32.217/3210.2.32.217 – 10.2.32.21710.2.32.217
9110.2.32.218/3210.2.32.218 – 10.2.32.21810.2.32.218
9210.2.32.219/3210.2.32.219 – 10.2.32.21910.2.32.219
9310.2.32.220/3210.2.32.220 – 10.2.32.22010.2.32.220
9410.2.32.221/3210.2.32.221 – 10.2.32.22110.2.32.221
9510.2.32.222/3210.2.32.222 – 10.2.32.22210.2.32.222
9610.2.32.223/3210.2.32.223 – 10.2.32.22310.2.32.223
9710.2.32.224/3210.2.32.224 – 10.2.32.22410.2.32.224
9810.2.32.225/3210.2.32.225 – 10.2.32.22510.2.32.225
9910.2.32.226/3210.2.32.226 – 10.2.32.22610.2.32.226
10010.2.32.227/3210.2.32.227 – 10.2.32.22710.2.32.227
10110.2.32.228/3210.2.32.228 – 10.2.32.22810.2.32.228
10210.2.32.229/3210.2.32.229 – 10.2.32.22910.2.32.229
10310.2.32.230/3210.2.32.230 – 10.2.32.23010.2.32.230
10410.2.32.231/3210.2.32.231 – 10.2.32.23110.2.32.231
10510.2.32.232/3210.2.32.232 – 10.2.32.23210.2.32.232
10610.2.32.233/3210.2.32.233 – 10.2.32.23310.2.32.233
10710.2.32.234/3210.2.32.234 – 10.2.32.23410.2.32.234
10810.2.32.235/3210.2.32.235 – 10.2.32.23510.2.32.235
10910.2.32.236/3210.2.32.236 – 10.2.32.23610.2.32.236
11010.2.32.237/3210.2.32.237 – 10.2.32.23710.2.32.237
11110.2.32.238/3210.2.32.238 – 10.2.32.23810.2.32.238
11210.2.32.239/3210.2.32.239 – 10.2.32.23910.2.32.239
11310.2.32.240/3210.2.32.240 – 10.2.32.24010.2.32.240
11410.2.32.241/3210.2.32.241 – 10.2.32.24110.2.32.241
11510.2.32.242/3210.2.32.242 – 10.2.32.24210.2.32.242
11610.2.32.243/3210.2.32.243 – 10.2.32.24310.2.32.243
11710.2.32.244/3210.2.32.244 – 10.2.32.24410.2.32.244
11810.2.32.245/3210.2.32.245 – 10.2.32.24510.2.32.245
11910.2.32.246/3210.2.32.246 – 10.2.32.24610.2.32.246
12010.2.32.247/3210.2.32.247 – 10.2.32.24710.2.32.247
12110.2.32.248/3210.2.32.248 – 10.2.32.24810.2.32.248
12210.2.32.249/3210.2.32.249 – 10.2.32.24910.2.32.249
12310.2.32.250/3210.2.32.250 – 10.2.32.25010.2.32.250
12410.2.32.251/3210.2.32.251 – 10.2.32.25110.2.32.251
12510.2.32.252/3210.2.32.252 – 10.2.32.25210.2.32.252
12610.2.32.253/3210.2.32.253 – 10.2.32.25310.2.32.253
12710.2.32.254/3210.2.32.254 – 10.2.32.25410.2.32.254
12810.2.32.255/3210.2.32.255 – 10.2.32.25510.2.32.255
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 →