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)10.167.204.128/25
network10.167.204.128/25
broadcast10.167.204.255
first host10.167.204.129
last host10.167.204.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.204.128/25
address00001010.10100111.11001100.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.11001100.10000000
broadcast00001010.10100111.11001100.11111111
green = network part, grey = host part
hex0x0aa7cc80
decimal178769024
reverse dns128.204.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:cc80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.204.128/3210.167.204.128 – 10.167.204.12810.167.204.128
210.167.204.129/3210.167.204.129 – 10.167.204.12910.167.204.129
310.167.204.130/3210.167.204.130 – 10.167.204.13010.167.204.130
410.167.204.131/3210.167.204.131 – 10.167.204.13110.167.204.131
510.167.204.132/3210.167.204.132 – 10.167.204.13210.167.204.132
610.167.204.133/3210.167.204.133 – 10.167.204.13310.167.204.133
710.167.204.134/3210.167.204.134 – 10.167.204.13410.167.204.134
810.167.204.135/3210.167.204.135 – 10.167.204.13510.167.204.135
910.167.204.136/3210.167.204.136 – 10.167.204.13610.167.204.136
1010.167.204.137/3210.167.204.137 – 10.167.204.13710.167.204.137
1110.167.204.138/3210.167.204.138 – 10.167.204.13810.167.204.138
1210.167.204.139/3210.167.204.139 – 10.167.204.13910.167.204.139
1310.167.204.140/3210.167.204.140 – 10.167.204.14010.167.204.140
1410.167.204.141/3210.167.204.141 – 10.167.204.14110.167.204.141
1510.167.204.142/3210.167.204.142 – 10.167.204.14210.167.204.142
1610.167.204.143/3210.167.204.143 – 10.167.204.14310.167.204.143
1710.167.204.144/3210.167.204.144 – 10.167.204.14410.167.204.144
1810.167.204.145/3210.167.204.145 – 10.167.204.14510.167.204.145
1910.167.204.146/3210.167.204.146 – 10.167.204.14610.167.204.146
2010.167.204.147/3210.167.204.147 – 10.167.204.14710.167.204.147
2110.167.204.148/3210.167.204.148 – 10.167.204.14810.167.204.148
2210.167.204.149/3210.167.204.149 – 10.167.204.14910.167.204.149
2310.167.204.150/3210.167.204.150 – 10.167.204.15010.167.204.150
2410.167.204.151/3210.167.204.151 – 10.167.204.15110.167.204.151
2510.167.204.152/3210.167.204.152 – 10.167.204.15210.167.204.152
2610.167.204.153/3210.167.204.153 – 10.167.204.15310.167.204.153
2710.167.204.154/3210.167.204.154 – 10.167.204.15410.167.204.154
2810.167.204.155/3210.167.204.155 – 10.167.204.15510.167.204.155
2910.167.204.156/3210.167.204.156 – 10.167.204.15610.167.204.156
3010.167.204.157/3210.167.204.157 – 10.167.204.15710.167.204.157
3110.167.204.158/3210.167.204.158 – 10.167.204.15810.167.204.158
3210.167.204.159/3210.167.204.159 – 10.167.204.15910.167.204.159
3310.167.204.160/3210.167.204.160 – 10.167.204.16010.167.204.160
3410.167.204.161/3210.167.204.161 – 10.167.204.16110.167.204.161
3510.167.204.162/3210.167.204.162 – 10.167.204.16210.167.204.162
3610.167.204.163/3210.167.204.163 – 10.167.204.16310.167.204.163
3710.167.204.164/3210.167.204.164 – 10.167.204.16410.167.204.164
3810.167.204.165/3210.167.204.165 – 10.167.204.16510.167.204.165
3910.167.204.166/3210.167.204.166 – 10.167.204.16610.167.204.166
4010.167.204.167/3210.167.204.167 – 10.167.204.16710.167.204.167
4110.167.204.168/3210.167.204.168 – 10.167.204.16810.167.204.168
4210.167.204.169/3210.167.204.169 – 10.167.204.16910.167.204.169
4310.167.204.170/3210.167.204.170 – 10.167.204.17010.167.204.170
4410.167.204.171/3210.167.204.171 – 10.167.204.17110.167.204.171
4510.167.204.172/3210.167.204.172 – 10.167.204.17210.167.204.172
4610.167.204.173/3210.167.204.173 – 10.167.204.17310.167.204.173
4710.167.204.174/3210.167.204.174 – 10.167.204.17410.167.204.174
4810.167.204.175/3210.167.204.175 – 10.167.204.17510.167.204.175
4910.167.204.176/3210.167.204.176 – 10.167.204.17610.167.204.176
5010.167.204.177/3210.167.204.177 – 10.167.204.17710.167.204.177
5110.167.204.178/3210.167.204.178 – 10.167.204.17810.167.204.178
5210.167.204.179/3210.167.204.179 – 10.167.204.17910.167.204.179
5310.167.204.180/3210.167.204.180 – 10.167.204.18010.167.204.180
5410.167.204.181/3210.167.204.181 – 10.167.204.18110.167.204.181
5510.167.204.182/3210.167.204.182 – 10.167.204.18210.167.204.182
5610.167.204.183/3210.167.204.183 – 10.167.204.18310.167.204.183
5710.167.204.184/3210.167.204.184 – 10.167.204.18410.167.204.184
5810.167.204.185/3210.167.204.185 – 10.167.204.18510.167.204.185
5910.167.204.186/3210.167.204.186 – 10.167.204.18610.167.204.186
6010.167.204.187/3210.167.204.187 – 10.167.204.18710.167.204.187
6110.167.204.188/3210.167.204.188 – 10.167.204.18810.167.204.188
6210.167.204.189/3210.167.204.189 – 10.167.204.18910.167.204.189
6310.167.204.190/3210.167.204.190 – 10.167.204.19010.167.204.190
6410.167.204.191/3210.167.204.191 – 10.167.204.19110.167.204.191
6510.167.204.192/3210.167.204.192 – 10.167.204.19210.167.204.192
6610.167.204.193/3210.167.204.193 – 10.167.204.19310.167.204.193
6710.167.204.194/3210.167.204.194 – 10.167.204.19410.167.204.194
6810.167.204.195/3210.167.204.195 – 10.167.204.19510.167.204.195
6910.167.204.196/3210.167.204.196 – 10.167.204.19610.167.204.196
7010.167.204.197/3210.167.204.197 – 10.167.204.19710.167.204.197
7110.167.204.198/3210.167.204.198 – 10.167.204.19810.167.204.198
7210.167.204.199/3210.167.204.199 – 10.167.204.19910.167.204.199
7310.167.204.200/3210.167.204.200 – 10.167.204.20010.167.204.200
7410.167.204.201/3210.167.204.201 – 10.167.204.20110.167.204.201
7510.167.204.202/3210.167.204.202 – 10.167.204.20210.167.204.202
7610.167.204.203/3210.167.204.203 – 10.167.204.20310.167.204.203
7710.167.204.204/3210.167.204.204 – 10.167.204.20410.167.204.204
7810.167.204.205/3210.167.204.205 – 10.167.204.20510.167.204.205
7910.167.204.206/3210.167.204.206 – 10.167.204.20610.167.204.206
8010.167.204.207/3210.167.204.207 – 10.167.204.20710.167.204.207
8110.167.204.208/3210.167.204.208 – 10.167.204.20810.167.204.208
8210.167.204.209/3210.167.204.209 – 10.167.204.20910.167.204.209
8310.167.204.210/3210.167.204.210 – 10.167.204.21010.167.204.210
8410.167.204.211/3210.167.204.211 – 10.167.204.21110.167.204.211
8510.167.204.212/3210.167.204.212 – 10.167.204.21210.167.204.212
8610.167.204.213/3210.167.204.213 – 10.167.204.21310.167.204.213
8710.167.204.214/3210.167.204.214 – 10.167.204.21410.167.204.214
8810.167.204.215/3210.167.204.215 – 10.167.204.21510.167.204.215
8910.167.204.216/3210.167.204.216 – 10.167.204.21610.167.204.216
9010.167.204.217/3210.167.204.217 – 10.167.204.21710.167.204.217
9110.167.204.218/3210.167.204.218 – 10.167.204.21810.167.204.218
9210.167.204.219/3210.167.204.219 – 10.167.204.21910.167.204.219
9310.167.204.220/3210.167.204.220 – 10.167.204.22010.167.204.220
9410.167.204.221/3210.167.204.221 – 10.167.204.22110.167.204.221
9510.167.204.222/3210.167.204.222 – 10.167.204.22210.167.204.222
9610.167.204.223/3210.167.204.223 – 10.167.204.22310.167.204.223
9710.167.204.224/3210.167.204.224 – 10.167.204.22410.167.204.224
9810.167.204.225/3210.167.204.225 – 10.167.204.22510.167.204.225
9910.167.204.226/3210.167.204.226 – 10.167.204.22610.167.204.226
10010.167.204.227/3210.167.204.227 – 10.167.204.22710.167.204.227
10110.167.204.228/3210.167.204.228 – 10.167.204.22810.167.204.228
10210.167.204.229/3210.167.204.229 – 10.167.204.22910.167.204.229
10310.167.204.230/3210.167.204.230 – 10.167.204.23010.167.204.230
10410.167.204.231/3210.167.204.231 – 10.167.204.23110.167.204.231
10510.167.204.232/3210.167.204.232 – 10.167.204.23210.167.204.232
10610.167.204.233/3210.167.204.233 – 10.167.204.23310.167.204.233
10710.167.204.234/3210.167.204.234 – 10.167.204.23410.167.204.234
10810.167.204.235/3210.167.204.235 – 10.167.204.23510.167.204.235
10910.167.204.236/3210.167.204.236 – 10.167.204.23610.167.204.236
11010.167.204.237/3210.167.204.237 – 10.167.204.23710.167.204.237
11110.167.204.238/3210.167.204.238 – 10.167.204.23810.167.204.238
11210.167.204.239/3210.167.204.239 – 10.167.204.23910.167.204.239
11310.167.204.240/3210.167.204.240 – 10.167.204.24010.167.204.240
11410.167.204.241/3210.167.204.241 – 10.167.204.24110.167.204.241
11510.167.204.242/3210.167.204.242 – 10.167.204.24210.167.204.242
11610.167.204.243/3210.167.204.243 – 10.167.204.24310.167.204.243
11710.167.204.244/3210.167.204.244 – 10.167.204.24410.167.204.244
11810.167.204.245/3210.167.204.245 – 10.167.204.24510.167.204.245
11910.167.204.246/3210.167.204.246 – 10.167.204.24610.167.204.246
12010.167.204.247/3210.167.204.247 – 10.167.204.24710.167.204.247
12110.167.204.248/3210.167.204.248 – 10.167.204.24810.167.204.248
12210.167.204.249/3210.167.204.249 – 10.167.204.24910.167.204.249
12310.167.204.250/3210.167.204.250 – 10.167.204.25010.167.204.250
12410.167.204.251/3210.167.204.251 – 10.167.204.25110.167.204.251
12510.167.204.252/3210.167.204.252 – 10.167.204.25210.167.204.252
12610.167.204.253/3210.167.204.253 – 10.167.204.25310.167.204.253
12710.167.204.254/3210.167.204.254 – 10.167.204.25410.167.204.254
12810.167.204.255/3210.167.204.255 – 10.167.204.25510.167.204.255
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 →