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)10.167.197.128/25
network10.167.197.128/25
broadcast10.167.197.255
first host10.167.197.129
last host10.167.197.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.197.128/25
address00001010.10100111.11000101.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.11000101.10000000
broadcast00001010.10100111.11000101.11111111
green = network part, grey = host part
hex0x0aa7c580
decimal178767232
reverse dns128.197.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:c580

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.197.128/3210.167.197.128 – 10.167.197.12810.167.197.128
210.167.197.129/3210.167.197.129 – 10.167.197.12910.167.197.129
310.167.197.130/3210.167.197.130 – 10.167.197.13010.167.197.130
410.167.197.131/3210.167.197.131 – 10.167.197.13110.167.197.131
510.167.197.132/3210.167.197.132 – 10.167.197.13210.167.197.132
610.167.197.133/3210.167.197.133 – 10.167.197.13310.167.197.133
710.167.197.134/3210.167.197.134 – 10.167.197.13410.167.197.134
810.167.197.135/3210.167.197.135 – 10.167.197.13510.167.197.135
910.167.197.136/3210.167.197.136 – 10.167.197.13610.167.197.136
1010.167.197.137/3210.167.197.137 – 10.167.197.13710.167.197.137
1110.167.197.138/3210.167.197.138 – 10.167.197.13810.167.197.138
1210.167.197.139/3210.167.197.139 – 10.167.197.13910.167.197.139
1310.167.197.140/3210.167.197.140 – 10.167.197.14010.167.197.140
1410.167.197.141/3210.167.197.141 – 10.167.197.14110.167.197.141
1510.167.197.142/3210.167.197.142 – 10.167.197.14210.167.197.142
1610.167.197.143/3210.167.197.143 – 10.167.197.14310.167.197.143
1710.167.197.144/3210.167.197.144 – 10.167.197.14410.167.197.144
1810.167.197.145/3210.167.197.145 – 10.167.197.14510.167.197.145
1910.167.197.146/3210.167.197.146 – 10.167.197.14610.167.197.146
2010.167.197.147/3210.167.197.147 – 10.167.197.14710.167.197.147
2110.167.197.148/3210.167.197.148 – 10.167.197.14810.167.197.148
2210.167.197.149/3210.167.197.149 – 10.167.197.14910.167.197.149
2310.167.197.150/3210.167.197.150 – 10.167.197.15010.167.197.150
2410.167.197.151/3210.167.197.151 – 10.167.197.15110.167.197.151
2510.167.197.152/3210.167.197.152 – 10.167.197.15210.167.197.152
2610.167.197.153/3210.167.197.153 – 10.167.197.15310.167.197.153
2710.167.197.154/3210.167.197.154 – 10.167.197.15410.167.197.154
2810.167.197.155/3210.167.197.155 – 10.167.197.15510.167.197.155
2910.167.197.156/3210.167.197.156 – 10.167.197.15610.167.197.156
3010.167.197.157/3210.167.197.157 – 10.167.197.15710.167.197.157
3110.167.197.158/3210.167.197.158 – 10.167.197.15810.167.197.158
3210.167.197.159/3210.167.197.159 – 10.167.197.15910.167.197.159
3310.167.197.160/3210.167.197.160 – 10.167.197.16010.167.197.160
3410.167.197.161/3210.167.197.161 – 10.167.197.16110.167.197.161
3510.167.197.162/3210.167.197.162 – 10.167.197.16210.167.197.162
3610.167.197.163/3210.167.197.163 – 10.167.197.16310.167.197.163
3710.167.197.164/3210.167.197.164 – 10.167.197.16410.167.197.164
3810.167.197.165/3210.167.197.165 – 10.167.197.16510.167.197.165
3910.167.197.166/3210.167.197.166 – 10.167.197.16610.167.197.166
4010.167.197.167/3210.167.197.167 – 10.167.197.16710.167.197.167
4110.167.197.168/3210.167.197.168 – 10.167.197.16810.167.197.168
4210.167.197.169/3210.167.197.169 – 10.167.197.16910.167.197.169
4310.167.197.170/3210.167.197.170 – 10.167.197.17010.167.197.170
4410.167.197.171/3210.167.197.171 – 10.167.197.17110.167.197.171
4510.167.197.172/3210.167.197.172 – 10.167.197.17210.167.197.172
4610.167.197.173/3210.167.197.173 – 10.167.197.17310.167.197.173
4710.167.197.174/3210.167.197.174 – 10.167.197.17410.167.197.174
4810.167.197.175/3210.167.197.175 – 10.167.197.17510.167.197.175
4910.167.197.176/3210.167.197.176 – 10.167.197.17610.167.197.176
5010.167.197.177/3210.167.197.177 – 10.167.197.17710.167.197.177
5110.167.197.178/3210.167.197.178 – 10.167.197.17810.167.197.178
5210.167.197.179/3210.167.197.179 – 10.167.197.17910.167.197.179
5310.167.197.180/3210.167.197.180 – 10.167.197.18010.167.197.180
5410.167.197.181/3210.167.197.181 – 10.167.197.18110.167.197.181
5510.167.197.182/3210.167.197.182 – 10.167.197.18210.167.197.182
5610.167.197.183/3210.167.197.183 – 10.167.197.18310.167.197.183
5710.167.197.184/3210.167.197.184 – 10.167.197.18410.167.197.184
5810.167.197.185/3210.167.197.185 – 10.167.197.18510.167.197.185
5910.167.197.186/3210.167.197.186 – 10.167.197.18610.167.197.186
6010.167.197.187/3210.167.197.187 – 10.167.197.18710.167.197.187
6110.167.197.188/3210.167.197.188 – 10.167.197.18810.167.197.188
6210.167.197.189/3210.167.197.189 – 10.167.197.18910.167.197.189
6310.167.197.190/3210.167.197.190 – 10.167.197.19010.167.197.190
6410.167.197.191/3210.167.197.191 – 10.167.197.19110.167.197.191
6510.167.197.192/3210.167.197.192 – 10.167.197.19210.167.197.192
6610.167.197.193/3210.167.197.193 – 10.167.197.19310.167.197.193
6710.167.197.194/3210.167.197.194 – 10.167.197.19410.167.197.194
6810.167.197.195/3210.167.197.195 – 10.167.197.19510.167.197.195
6910.167.197.196/3210.167.197.196 – 10.167.197.19610.167.197.196
7010.167.197.197/3210.167.197.197 – 10.167.197.19710.167.197.197
7110.167.197.198/3210.167.197.198 – 10.167.197.19810.167.197.198
7210.167.197.199/3210.167.197.199 – 10.167.197.19910.167.197.199
7310.167.197.200/3210.167.197.200 – 10.167.197.20010.167.197.200
7410.167.197.201/3210.167.197.201 – 10.167.197.20110.167.197.201
7510.167.197.202/3210.167.197.202 – 10.167.197.20210.167.197.202
7610.167.197.203/3210.167.197.203 – 10.167.197.20310.167.197.203
7710.167.197.204/3210.167.197.204 – 10.167.197.20410.167.197.204
7810.167.197.205/3210.167.197.205 – 10.167.197.20510.167.197.205
7910.167.197.206/3210.167.197.206 – 10.167.197.20610.167.197.206
8010.167.197.207/3210.167.197.207 – 10.167.197.20710.167.197.207
8110.167.197.208/3210.167.197.208 – 10.167.197.20810.167.197.208
8210.167.197.209/3210.167.197.209 – 10.167.197.20910.167.197.209
8310.167.197.210/3210.167.197.210 – 10.167.197.21010.167.197.210
8410.167.197.211/3210.167.197.211 – 10.167.197.21110.167.197.211
8510.167.197.212/3210.167.197.212 – 10.167.197.21210.167.197.212
8610.167.197.213/3210.167.197.213 – 10.167.197.21310.167.197.213
8710.167.197.214/3210.167.197.214 – 10.167.197.21410.167.197.214
8810.167.197.215/3210.167.197.215 – 10.167.197.21510.167.197.215
8910.167.197.216/3210.167.197.216 – 10.167.197.21610.167.197.216
9010.167.197.217/3210.167.197.217 – 10.167.197.21710.167.197.217
9110.167.197.218/3210.167.197.218 – 10.167.197.21810.167.197.218
9210.167.197.219/3210.167.197.219 – 10.167.197.21910.167.197.219
9310.167.197.220/3210.167.197.220 – 10.167.197.22010.167.197.220
9410.167.197.221/3210.167.197.221 – 10.167.197.22110.167.197.221
9510.167.197.222/3210.167.197.222 – 10.167.197.22210.167.197.222
9610.167.197.223/3210.167.197.223 – 10.167.197.22310.167.197.223
9710.167.197.224/3210.167.197.224 – 10.167.197.22410.167.197.224
9810.167.197.225/3210.167.197.225 – 10.167.197.22510.167.197.225
9910.167.197.226/3210.167.197.226 – 10.167.197.22610.167.197.226
10010.167.197.227/3210.167.197.227 – 10.167.197.22710.167.197.227
10110.167.197.228/3210.167.197.228 – 10.167.197.22810.167.197.228
10210.167.197.229/3210.167.197.229 – 10.167.197.22910.167.197.229
10310.167.197.230/3210.167.197.230 – 10.167.197.23010.167.197.230
10410.167.197.231/3210.167.197.231 – 10.167.197.23110.167.197.231
10510.167.197.232/3210.167.197.232 – 10.167.197.23210.167.197.232
10610.167.197.233/3210.167.197.233 – 10.167.197.23310.167.197.233
10710.167.197.234/3210.167.197.234 – 10.167.197.23410.167.197.234
10810.167.197.235/3210.167.197.235 – 10.167.197.23510.167.197.235
10910.167.197.236/3210.167.197.236 – 10.167.197.23610.167.197.236
11010.167.197.237/3210.167.197.237 – 10.167.197.23710.167.197.237
11110.167.197.238/3210.167.197.238 – 10.167.197.23810.167.197.238
11210.167.197.239/3210.167.197.239 – 10.167.197.23910.167.197.239
11310.167.197.240/3210.167.197.240 – 10.167.197.24010.167.197.240
11410.167.197.241/3210.167.197.241 – 10.167.197.24110.167.197.241
11510.167.197.242/3210.167.197.242 – 10.167.197.24210.167.197.242
11610.167.197.243/3210.167.197.243 – 10.167.197.24310.167.197.243
11710.167.197.244/3210.167.197.244 – 10.167.197.24410.167.197.244
11810.167.197.245/3210.167.197.245 – 10.167.197.24510.167.197.245
11910.167.197.246/3210.167.197.246 – 10.167.197.24610.167.197.246
12010.167.197.247/3210.167.197.247 – 10.167.197.24710.167.197.247
12110.167.197.248/3210.167.197.248 – 10.167.197.24810.167.197.248
12210.167.197.249/3210.167.197.249 – 10.167.197.24910.167.197.249
12310.167.197.250/3210.167.197.250 – 10.167.197.25010.167.197.250
12410.167.197.251/3210.167.197.251 – 10.167.197.25110.167.197.251
12510.167.197.252/3210.167.197.252 – 10.167.197.25210.167.197.252
12610.167.197.253/3210.167.197.253 – 10.167.197.25310.167.197.253
12710.167.197.254/3210.167.197.254 – 10.167.197.25410.167.197.254
12810.167.197.255/3210.167.197.255 – 10.167.197.25510.167.197.255
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 →