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)10.167.157.128/25
network10.167.157.128/25
broadcast10.167.157.255
first host10.167.157.129
last host10.167.157.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.157.128/25
address00001010.10100111.10011101.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.10011101.10000000
broadcast00001010.10100111.10011101.11111111
green = network part, grey = host part
hex0x0aa79d80
decimal178756992
reverse dns128.157.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:9d80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.157.128/3210.167.157.128 – 10.167.157.12810.167.157.128
210.167.157.129/3210.167.157.129 – 10.167.157.12910.167.157.129
310.167.157.130/3210.167.157.130 – 10.167.157.13010.167.157.130
410.167.157.131/3210.167.157.131 – 10.167.157.13110.167.157.131
510.167.157.132/3210.167.157.132 – 10.167.157.13210.167.157.132
610.167.157.133/3210.167.157.133 – 10.167.157.13310.167.157.133
710.167.157.134/3210.167.157.134 – 10.167.157.13410.167.157.134
810.167.157.135/3210.167.157.135 – 10.167.157.13510.167.157.135
910.167.157.136/3210.167.157.136 – 10.167.157.13610.167.157.136
1010.167.157.137/3210.167.157.137 – 10.167.157.13710.167.157.137
1110.167.157.138/3210.167.157.138 – 10.167.157.13810.167.157.138
1210.167.157.139/3210.167.157.139 – 10.167.157.13910.167.157.139
1310.167.157.140/3210.167.157.140 – 10.167.157.14010.167.157.140
1410.167.157.141/3210.167.157.141 – 10.167.157.14110.167.157.141
1510.167.157.142/3210.167.157.142 – 10.167.157.14210.167.157.142
1610.167.157.143/3210.167.157.143 – 10.167.157.14310.167.157.143
1710.167.157.144/3210.167.157.144 – 10.167.157.14410.167.157.144
1810.167.157.145/3210.167.157.145 – 10.167.157.14510.167.157.145
1910.167.157.146/3210.167.157.146 – 10.167.157.14610.167.157.146
2010.167.157.147/3210.167.157.147 – 10.167.157.14710.167.157.147
2110.167.157.148/3210.167.157.148 – 10.167.157.14810.167.157.148
2210.167.157.149/3210.167.157.149 – 10.167.157.14910.167.157.149
2310.167.157.150/3210.167.157.150 – 10.167.157.15010.167.157.150
2410.167.157.151/3210.167.157.151 – 10.167.157.15110.167.157.151
2510.167.157.152/3210.167.157.152 – 10.167.157.15210.167.157.152
2610.167.157.153/3210.167.157.153 – 10.167.157.15310.167.157.153
2710.167.157.154/3210.167.157.154 – 10.167.157.15410.167.157.154
2810.167.157.155/3210.167.157.155 – 10.167.157.15510.167.157.155
2910.167.157.156/3210.167.157.156 – 10.167.157.15610.167.157.156
3010.167.157.157/3210.167.157.157 – 10.167.157.15710.167.157.157
3110.167.157.158/3210.167.157.158 – 10.167.157.15810.167.157.158
3210.167.157.159/3210.167.157.159 – 10.167.157.15910.167.157.159
3310.167.157.160/3210.167.157.160 – 10.167.157.16010.167.157.160
3410.167.157.161/3210.167.157.161 – 10.167.157.16110.167.157.161
3510.167.157.162/3210.167.157.162 – 10.167.157.16210.167.157.162
3610.167.157.163/3210.167.157.163 – 10.167.157.16310.167.157.163
3710.167.157.164/3210.167.157.164 – 10.167.157.16410.167.157.164
3810.167.157.165/3210.167.157.165 – 10.167.157.16510.167.157.165
3910.167.157.166/3210.167.157.166 – 10.167.157.16610.167.157.166
4010.167.157.167/3210.167.157.167 – 10.167.157.16710.167.157.167
4110.167.157.168/3210.167.157.168 – 10.167.157.16810.167.157.168
4210.167.157.169/3210.167.157.169 – 10.167.157.16910.167.157.169
4310.167.157.170/3210.167.157.170 – 10.167.157.17010.167.157.170
4410.167.157.171/3210.167.157.171 – 10.167.157.17110.167.157.171
4510.167.157.172/3210.167.157.172 – 10.167.157.17210.167.157.172
4610.167.157.173/3210.167.157.173 – 10.167.157.17310.167.157.173
4710.167.157.174/3210.167.157.174 – 10.167.157.17410.167.157.174
4810.167.157.175/3210.167.157.175 – 10.167.157.17510.167.157.175
4910.167.157.176/3210.167.157.176 – 10.167.157.17610.167.157.176
5010.167.157.177/3210.167.157.177 – 10.167.157.17710.167.157.177
5110.167.157.178/3210.167.157.178 – 10.167.157.17810.167.157.178
5210.167.157.179/3210.167.157.179 – 10.167.157.17910.167.157.179
5310.167.157.180/3210.167.157.180 – 10.167.157.18010.167.157.180
5410.167.157.181/3210.167.157.181 – 10.167.157.18110.167.157.181
5510.167.157.182/3210.167.157.182 – 10.167.157.18210.167.157.182
5610.167.157.183/3210.167.157.183 – 10.167.157.18310.167.157.183
5710.167.157.184/3210.167.157.184 – 10.167.157.18410.167.157.184
5810.167.157.185/3210.167.157.185 – 10.167.157.18510.167.157.185
5910.167.157.186/3210.167.157.186 – 10.167.157.18610.167.157.186
6010.167.157.187/3210.167.157.187 – 10.167.157.18710.167.157.187
6110.167.157.188/3210.167.157.188 – 10.167.157.18810.167.157.188
6210.167.157.189/3210.167.157.189 – 10.167.157.18910.167.157.189
6310.167.157.190/3210.167.157.190 – 10.167.157.19010.167.157.190
6410.167.157.191/3210.167.157.191 – 10.167.157.19110.167.157.191
6510.167.157.192/3210.167.157.192 – 10.167.157.19210.167.157.192
6610.167.157.193/3210.167.157.193 – 10.167.157.19310.167.157.193
6710.167.157.194/3210.167.157.194 – 10.167.157.19410.167.157.194
6810.167.157.195/3210.167.157.195 – 10.167.157.19510.167.157.195
6910.167.157.196/3210.167.157.196 – 10.167.157.19610.167.157.196
7010.167.157.197/3210.167.157.197 – 10.167.157.19710.167.157.197
7110.167.157.198/3210.167.157.198 – 10.167.157.19810.167.157.198
7210.167.157.199/3210.167.157.199 – 10.167.157.19910.167.157.199
7310.167.157.200/3210.167.157.200 – 10.167.157.20010.167.157.200
7410.167.157.201/3210.167.157.201 – 10.167.157.20110.167.157.201
7510.167.157.202/3210.167.157.202 – 10.167.157.20210.167.157.202
7610.167.157.203/3210.167.157.203 – 10.167.157.20310.167.157.203
7710.167.157.204/3210.167.157.204 – 10.167.157.20410.167.157.204
7810.167.157.205/3210.167.157.205 – 10.167.157.20510.167.157.205
7910.167.157.206/3210.167.157.206 – 10.167.157.20610.167.157.206
8010.167.157.207/3210.167.157.207 – 10.167.157.20710.167.157.207
8110.167.157.208/3210.167.157.208 – 10.167.157.20810.167.157.208
8210.167.157.209/3210.167.157.209 – 10.167.157.20910.167.157.209
8310.167.157.210/3210.167.157.210 – 10.167.157.21010.167.157.210
8410.167.157.211/3210.167.157.211 – 10.167.157.21110.167.157.211
8510.167.157.212/3210.167.157.212 – 10.167.157.21210.167.157.212
8610.167.157.213/3210.167.157.213 – 10.167.157.21310.167.157.213
8710.167.157.214/3210.167.157.214 – 10.167.157.21410.167.157.214
8810.167.157.215/3210.167.157.215 – 10.167.157.21510.167.157.215
8910.167.157.216/3210.167.157.216 – 10.167.157.21610.167.157.216
9010.167.157.217/3210.167.157.217 – 10.167.157.21710.167.157.217
9110.167.157.218/3210.167.157.218 – 10.167.157.21810.167.157.218
9210.167.157.219/3210.167.157.219 – 10.167.157.21910.167.157.219
9310.167.157.220/3210.167.157.220 – 10.167.157.22010.167.157.220
9410.167.157.221/3210.167.157.221 – 10.167.157.22110.167.157.221
9510.167.157.222/3210.167.157.222 – 10.167.157.22210.167.157.222
9610.167.157.223/3210.167.157.223 – 10.167.157.22310.167.157.223
9710.167.157.224/3210.167.157.224 – 10.167.157.22410.167.157.224
9810.167.157.225/3210.167.157.225 – 10.167.157.22510.167.157.225
9910.167.157.226/3210.167.157.226 – 10.167.157.22610.167.157.226
10010.167.157.227/3210.167.157.227 – 10.167.157.22710.167.157.227
10110.167.157.228/3210.167.157.228 – 10.167.157.22810.167.157.228
10210.167.157.229/3210.167.157.229 – 10.167.157.22910.167.157.229
10310.167.157.230/3210.167.157.230 – 10.167.157.23010.167.157.230
10410.167.157.231/3210.167.157.231 – 10.167.157.23110.167.157.231
10510.167.157.232/3210.167.157.232 – 10.167.157.23210.167.157.232
10610.167.157.233/3210.167.157.233 – 10.167.157.23310.167.157.233
10710.167.157.234/3210.167.157.234 – 10.167.157.23410.167.157.234
10810.167.157.235/3210.167.157.235 – 10.167.157.23510.167.157.235
10910.167.157.236/3210.167.157.236 – 10.167.157.23610.167.157.236
11010.167.157.237/3210.167.157.237 – 10.167.157.23710.167.157.237
11110.167.157.238/3210.167.157.238 – 10.167.157.23810.167.157.238
11210.167.157.239/3210.167.157.239 – 10.167.157.23910.167.157.239
11310.167.157.240/3210.167.157.240 – 10.167.157.24010.167.157.240
11410.167.157.241/3210.167.157.241 – 10.167.157.24110.167.157.241
11510.167.157.242/3210.167.157.242 – 10.167.157.24210.167.157.242
11610.167.157.243/3210.167.157.243 – 10.167.157.24310.167.157.243
11710.167.157.244/3210.167.157.244 – 10.167.157.24410.167.157.244
11810.167.157.245/3210.167.157.245 – 10.167.157.24510.167.157.245
11910.167.157.246/3210.167.157.246 – 10.167.157.24610.167.157.246
12010.167.157.247/3210.167.157.247 – 10.167.157.24710.167.157.247
12110.167.157.248/3210.167.157.248 – 10.167.157.24810.167.157.248
12210.167.157.249/3210.167.157.249 – 10.167.157.24910.167.157.249
12310.167.157.250/3210.167.157.250 – 10.167.157.25010.167.157.250
12410.167.157.251/3210.167.157.251 – 10.167.157.25110.167.157.251
12510.167.157.252/3210.167.157.252 – 10.167.157.25210.167.157.252
12610.167.157.253/3210.167.157.253 – 10.167.157.25310.167.157.253
12710.167.157.254/3210.167.157.254 – 10.167.157.25410.167.157.254
12810.167.157.255/3210.167.157.255 – 10.167.157.25510.167.157.255
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 →