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)10.2.162.128/25
network10.2.162.128/25
broadcast10.2.162.255
first host10.2.162.129
last host10.2.162.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.162.128/25
address00001010.00000010.10100010.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.10100010.10000000
broadcast00001010.00000010.10100010.11111111
green = network part, grey = host part
hex0x0a02a280
decimal167944832
reverse dns128.162.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:a280

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.162.128/3210.2.162.128 – 10.2.162.12810.2.162.128
210.2.162.129/3210.2.162.129 – 10.2.162.12910.2.162.129
310.2.162.130/3210.2.162.130 – 10.2.162.13010.2.162.130
410.2.162.131/3210.2.162.131 – 10.2.162.13110.2.162.131
510.2.162.132/3210.2.162.132 – 10.2.162.13210.2.162.132
610.2.162.133/3210.2.162.133 – 10.2.162.13310.2.162.133
710.2.162.134/3210.2.162.134 – 10.2.162.13410.2.162.134
810.2.162.135/3210.2.162.135 – 10.2.162.13510.2.162.135
910.2.162.136/3210.2.162.136 – 10.2.162.13610.2.162.136
1010.2.162.137/3210.2.162.137 – 10.2.162.13710.2.162.137
1110.2.162.138/3210.2.162.138 – 10.2.162.13810.2.162.138
1210.2.162.139/3210.2.162.139 – 10.2.162.13910.2.162.139
1310.2.162.140/3210.2.162.140 – 10.2.162.14010.2.162.140
1410.2.162.141/3210.2.162.141 – 10.2.162.14110.2.162.141
1510.2.162.142/3210.2.162.142 – 10.2.162.14210.2.162.142
1610.2.162.143/3210.2.162.143 – 10.2.162.14310.2.162.143
1710.2.162.144/3210.2.162.144 – 10.2.162.14410.2.162.144
1810.2.162.145/3210.2.162.145 – 10.2.162.14510.2.162.145
1910.2.162.146/3210.2.162.146 – 10.2.162.14610.2.162.146
2010.2.162.147/3210.2.162.147 – 10.2.162.14710.2.162.147
2110.2.162.148/3210.2.162.148 – 10.2.162.14810.2.162.148
2210.2.162.149/3210.2.162.149 – 10.2.162.14910.2.162.149
2310.2.162.150/3210.2.162.150 – 10.2.162.15010.2.162.150
2410.2.162.151/3210.2.162.151 – 10.2.162.15110.2.162.151
2510.2.162.152/3210.2.162.152 – 10.2.162.15210.2.162.152
2610.2.162.153/3210.2.162.153 – 10.2.162.15310.2.162.153
2710.2.162.154/3210.2.162.154 – 10.2.162.15410.2.162.154
2810.2.162.155/3210.2.162.155 – 10.2.162.15510.2.162.155
2910.2.162.156/3210.2.162.156 – 10.2.162.15610.2.162.156
3010.2.162.157/3210.2.162.157 – 10.2.162.15710.2.162.157
3110.2.162.158/3210.2.162.158 – 10.2.162.15810.2.162.158
3210.2.162.159/3210.2.162.159 – 10.2.162.15910.2.162.159
3310.2.162.160/3210.2.162.160 – 10.2.162.16010.2.162.160
3410.2.162.161/3210.2.162.161 – 10.2.162.16110.2.162.161
3510.2.162.162/3210.2.162.162 – 10.2.162.16210.2.162.162
3610.2.162.163/3210.2.162.163 – 10.2.162.16310.2.162.163
3710.2.162.164/3210.2.162.164 – 10.2.162.16410.2.162.164
3810.2.162.165/3210.2.162.165 – 10.2.162.16510.2.162.165
3910.2.162.166/3210.2.162.166 – 10.2.162.16610.2.162.166
4010.2.162.167/3210.2.162.167 – 10.2.162.16710.2.162.167
4110.2.162.168/3210.2.162.168 – 10.2.162.16810.2.162.168
4210.2.162.169/3210.2.162.169 – 10.2.162.16910.2.162.169
4310.2.162.170/3210.2.162.170 – 10.2.162.17010.2.162.170
4410.2.162.171/3210.2.162.171 – 10.2.162.17110.2.162.171
4510.2.162.172/3210.2.162.172 – 10.2.162.17210.2.162.172
4610.2.162.173/3210.2.162.173 – 10.2.162.17310.2.162.173
4710.2.162.174/3210.2.162.174 – 10.2.162.17410.2.162.174
4810.2.162.175/3210.2.162.175 – 10.2.162.17510.2.162.175
4910.2.162.176/3210.2.162.176 – 10.2.162.17610.2.162.176
5010.2.162.177/3210.2.162.177 – 10.2.162.17710.2.162.177
5110.2.162.178/3210.2.162.178 – 10.2.162.17810.2.162.178
5210.2.162.179/3210.2.162.179 – 10.2.162.17910.2.162.179
5310.2.162.180/3210.2.162.180 – 10.2.162.18010.2.162.180
5410.2.162.181/3210.2.162.181 – 10.2.162.18110.2.162.181
5510.2.162.182/3210.2.162.182 – 10.2.162.18210.2.162.182
5610.2.162.183/3210.2.162.183 – 10.2.162.18310.2.162.183
5710.2.162.184/3210.2.162.184 – 10.2.162.18410.2.162.184
5810.2.162.185/3210.2.162.185 – 10.2.162.18510.2.162.185
5910.2.162.186/3210.2.162.186 – 10.2.162.18610.2.162.186
6010.2.162.187/3210.2.162.187 – 10.2.162.18710.2.162.187
6110.2.162.188/3210.2.162.188 – 10.2.162.18810.2.162.188
6210.2.162.189/3210.2.162.189 – 10.2.162.18910.2.162.189
6310.2.162.190/3210.2.162.190 – 10.2.162.19010.2.162.190
6410.2.162.191/3210.2.162.191 – 10.2.162.19110.2.162.191
6510.2.162.192/3210.2.162.192 – 10.2.162.19210.2.162.192
6610.2.162.193/3210.2.162.193 – 10.2.162.19310.2.162.193
6710.2.162.194/3210.2.162.194 – 10.2.162.19410.2.162.194
6810.2.162.195/3210.2.162.195 – 10.2.162.19510.2.162.195
6910.2.162.196/3210.2.162.196 – 10.2.162.19610.2.162.196
7010.2.162.197/3210.2.162.197 – 10.2.162.19710.2.162.197
7110.2.162.198/3210.2.162.198 – 10.2.162.19810.2.162.198
7210.2.162.199/3210.2.162.199 – 10.2.162.19910.2.162.199
7310.2.162.200/3210.2.162.200 – 10.2.162.20010.2.162.200
7410.2.162.201/3210.2.162.201 – 10.2.162.20110.2.162.201
7510.2.162.202/3210.2.162.202 – 10.2.162.20210.2.162.202
7610.2.162.203/3210.2.162.203 – 10.2.162.20310.2.162.203
7710.2.162.204/3210.2.162.204 – 10.2.162.20410.2.162.204
7810.2.162.205/3210.2.162.205 – 10.2.162.20510.2.162.205
7910.2.162.206/3210.2.162.206 – 10.2.162.20610.2.162.206
8010.2.162.207/3210.2.162.207 – 10.2.162.20710.2.162.207
8110.2.162.208/3210.2.162.208 – 10.2.162.20810.2.162.208
8210.2.162.209/3210.2.162.209 – 10.2.162.20910.2.162.209
8310.2.162.210/3210.2.162.210 – 10.2.162.21010.2.162.210
8410.2.162.211/3210.2.162.211 – 10.2.162.21110.2.162.211
8510.2.162.212/3210.2.162.212 – 10.2.162.21210.2.162.212
8610.2.162.213/3210.2.162.213 – 10.2.162.21310.2.162.213
8710.2.162.214/3210.2.162.214 – 10.2.162.21410.2.162.214
8810.2.162.215/3210.2.162.215 – 10.2.162.21510.2.162.215
8910.2.162.216/3210.2.162.216 – 10.2.162.21610.2.162.216
9010.2.162.217/3210.2.162.217 – 10.2.162.21710.2.162.217
9110.2.162.218/3210.2.162.218 – 10.2.162.21810.2.162.218
9210.2.162.219/3210.2.162.219 – 10.2.162.21910.2.162.219
9310.2.162.220/3210.2.162.220 – 10.2.162.22010.2.162.220
9410.2.162.221/3210.2.162.221 – 10.2.162.22110.2.162.221
9510.2.162.222/3210.2.162.222 – 10.2.162.22210.2.162.222
9610.2.162.223/3210.2.162.223 – 10.2.162.22310.2.162.223
9710.2.162.224/3210.2.162.224 – 10.2.162.22410.2.162.224
9810.2.162.225/3210.2.162.225 – 10.2.162.22510.2.162.225
9910.2.162.226/3210.2.162.226 – 10.2.162.22610.2.162.226
10010.2.162.227/3210.2.162.227 – 10.2.162.22710.2.162.227
10110.2.162.228/3210.2.162.228 – 10.2.162.22810.2.162.228
10210.2.162.229/3210.2.162.229 – 10.2.162.22910.2.162.229
10310.2.162.230/3210.2.162.230 – 10.2.162.23010.2.162.230
10410.2.162.231/3210.2.162.231 – 10.2.162.23110.2.162.231
10510.2.162.232/3210.2.162.232 – 10.2.162.23210.2.162.232
10610.2.162.233/3210.2.162.233 – 10.2.162.23310.2.162.233
10710.2.162.234/3210.2.162.234 – 10.2.162.23410.2.162.234
10810.2.162.235/3210.2.162.235 – 10.2.162.23510.2.162.235
10910.2.162.236/3210.2.162.236 – 10.2.162.23610.2.162.236
11010.2.162.237/3210.2.162.237 – 10.2.162.23710.2.162.237
11110.2.162.238/3210.2.162.238 – 10.2.162.23810.2.162.238
11210.2.162.239/3210.2.162.239 – 10.2.162.23910.2.162.239
11310.2.162.240/3210.2.162.240 – 10.2.162.24010.2.162.240
11410.2.162.241/3210.2.162.241 – 10.2.162.24110.2.162.241
11510.2.162.242/3210.2.162.242 – 10.2.162.24210.2.162.242
11610.2.162.243/3210.2.162.243 – 10.2.162.24310.2.162.243
11710.2.162.244/3210.2.162.244 – 10.2.162.24410.2.162.244
11810.2.162.245/3210.2.162.245 – 10.2.162.24510.2.162.245
11910.2.162.246/3210.2.162.246 – 10.2.162.24610.2.162.246
12010.2.162.247/3210.2.162.247 – 10.2.162.24710.2.162.247
12110.2.162.248/3210.2.162.248 – 10.2.162.24810.2.162.248
12210.2.162.249/3210.2.162.249 – 10.2.162.24910.2.162.249
12310.2.162.250/3210.2.162.250 – 10.2.162.25010.2.162.250
12410.2.162.251/3210.2.162.251 – 10.2.162.25110.2.162.251
12510.2.162.252/3210.2.162.252 – 10.2.162.25210.2.162.252
12610.2.162.253/3210.2.162.253 – 10.2.162.25310.2.162.253
12710.2.162.254/3210.2.162.254 – 10.2.162.25410.2.162.254
12810.2.162.255/3210.2.162.255 – 10.2.162.25510.2.162.255
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 →