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)10.167.42.128/25
network10.167.42.128/25
broadcast10.167.42.255
first host10.167.42.129
last host10.167.42.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.42.128/25
address00001010.10100111.00101010.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00101010.10000000
broadcast00001010.10100111.00101010.11111111
green = network part, grey = host part
hex0x0aa72a80
decimal178727552
reverse dns128.42.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:2a80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.42.128/3210.167.42.128 – 10.167.42.12810.167.42.128
210.167.42.129/3210.167.42.129 – 10.167.42.12910.167.42.129
310.167.42.130/3210.167.42.130 – 10.167.42.13010.167.42.130
410.167.42.131/3210.167.42.131 – 10.167.42.13110.167.42.131
510.167.42.132/3210.167.42.132 – 10.167.42.13210.167.42.132
610.167.42.133/3210.167.42.133 – 10.167.42.13310.167.42.133
710.167.42.134/3210.167.42.134 – 10.167.42.13410.167.42.134
810.167.42.135/3210.167.42.135 – 10.167.42.13510.167.42.135
910.167.42.136/3210.167.42.136 – 10.167.42.13610.167.42.136
1010.167.42.137/3210.167.42.137 – 10.167.42.13710.167.42.137
1110.167.42.138/3210.167.42.138 – 10.167.42.13810.167.42.138
1210.167.42.139/3210.167.42.139 – 10.167.42.13910.167.42.139
1310.167.42.140/3210.167.42.140 – 10.167.42.14010.167.42.140
1410.167.42.141/3210.167.42.141 – 10.167.42.14110.167.42.141
1510.167.42.142/3210.167.42.142 – 10.167.42.14210.167.42.142
1610.167.42.143/3210.167.42.143 – 10.167.42.14310.167.42.143
1710.167.42.144/3210.167.42.144 – 10.167.42.14410.167.42.144
1810.167.42.145/3210.167.42.145 – 10.167.42.14510.167.42.145
1910.167.42.146/3210.167.42.146 – 10.167.42.14610.167.42.146
2010.167.42.147/3210.167.42.147 – 10.167.42.14710.167.42.147
2110.167.42.148/3210.167.42.148 – 10.167.42.14810.167.42.148
2210.167.42.149/3210.167.42.149 – 10.167.42.14910.167.42.149
2310.167.42.150/3210.167.42.150 – 10.167.42.15010.167.42.150
2410.167.42.151/3210.167.42.151 – 10.167.42.15110.167.42.151
2510.167.42.152/3210.167.42.152 – 10.167.42.15210.167.42.152
2610.167.42.153/3210.167.42.153 – 10.167.42.15310.167.42.153
2710.167.42.154/3210.167.42.154 – 10.167.42.15410.167.42.154
2810.167.42.155/3210.167.42.155 – 10.167.42.15510.167.42.155
2910.167.42.156/3210.167.42.156 – 10.167.42.15610.167.42.156
3010.167.42.157/3210.167.42.157 – 10.167.42.15710.167.42.157
3110.167.42.158/3210.167.42.158 – 10.167.42.15810.167.42.158
3210.167.42.159/3210.167.42.159 – 10.167.42.15910.167.42.159
3310.167.42.160/3210.167.42.160 – 10.167.42.16010.167.42.160
3410.167.42.161/3210.167.42.161 – 10.167.42.16110.167.42.161
3510.167.42.162/3210.167.42.162 – 10.167.42.16210.167.42.162
3610.167.42.163/3210.167.42.163 – 10.167.42.16310.167.42.163
3710.167.42.164/3210.167.42.164 – 10.167.42.16410.167.42.164
3810.167.42.165/3210.167.42.165 – 10.167.42.16510.167.42.165
3910.167.42.166/3210.167.42.166 – 10.167.42.16610.167.42.166
4010.167.42.167/3210.167.42.167 – 10.167.42.16710.167.42.167
4110.167.42.168/3210.167.42.168 – 10.167.42.16810.167.42.168
4210.167.42.169/3210.167.42.169 – 10.167.42.16910.167.42.169
4310.167.42.170/3210.167.42.170 – 10.167.42.17010.167.42.170
4410.167.42.171/3210.167.42.171 – 10.167.42.17110.167.42.171
4510.167.42.172/3210.167.42.172 – 10.167.42.17210.167.42.172
4610.167.42.173/3210.167.42.173 – 10.167.42.17310.167.42.173
4710.167.42.174/3210.167.42.174 – 10.167.42.17410.167.42.174
4810.167.42.175/3210.167.42.175 – 10.167.42.17510.167.42.175
4910.167.42.176/3210.167.42.176 – 10.167.42.17610.167.42.176
5010.167.42.177/3210.167.42.177 – 10.167.42.17710.167.42.177
5110.167.42.178/3210.167.42.178 – 10.167.42.17810.167.42.178
5210.167.42.179/3210.167.42.179 – 10.167.42.17910.167.42.179
5310.167.42.180/3210.167.42.180 – 10.167.42.18010.167.42.180
5410.167.42.181/3210.167.42.181 – 10.167.42.18110.167.42.181
5510.167.42.182/3210.167.42.182 – 10.167.42.18210.167.42.182
5610.167.42.183/3210.167.42.183 – 10.167.42.18310.167.42.183
5710.167.42.184/3210.167.42.184 – 10.167.42.18410.167.42.184
5810.167.42.185/3210.167.42.185 – 10.167.42.18510.167.42.185
5910.167.42.186/3210.167.42.186 – 10.167.42.18610.167.42.186
6010.167.42.187/3210.167.42.187 – 10.167.42.18710.167.42.187
6110.167.42.188/3210.167.42.188 – 10.167.42.18810.167.42.188
6210.167.42.189/3210.167.42.189 – 10.167.42.18910.167.42.189
6310.167.42.190/3210.167.42.190 – 10.167.42.19010.167.42.190
6410.167.42.191/3210.167.42.191 – 10.167.42.19110.167.42.191
6510.167.42.192/3210.167.42.192 – 10.167.42.19210.167.42.192
6610.167.42.193/3210.167.42.193 – 10.167.42.19310.167.42.193
6710.167.42.194/3210.167.42.194 – 10.167.42.19410.167.42.194
6810.167.42.195/3210.167.42.195 – 10.167.42.19510.167.42.195
6910.167.42.196/3210.167.42.196 – 10.167.42.19610.167.42.196
7010.167.42.197/3210.167.42.197 – 10.167.42.19710.167.42.197
7110.167.42.198/3210.167.42.198 – 10.167.42.19810.167.42.198
7210.167.42.199/3210.167.42.199 – 10.167.42.19910.167.42.199
7310.167.42.200/3210.167.42.200 – 10.167.42.20010.167.42.200
7410.167.42.201/3210.167.42.201 – 10.167.42.20110.167.42.201
7510.167.42.202/3210.167.42.202 – 10.167.42.20210.167.42.202
7610.167.42.203/3210.167.42.203 – 10.167.42.20310.167.42.203
7710.167.42.204/3210.167.42.204 – 10.167.42.20410.167.42.204
7810.167.42.205/3210.167.42.205 – 10.167.42.20510.167.42.205
7910.167.42.206/3210.167.42.206 – 10.167.42.20610.167.42.206
8010.167.42.207/3210.167.42.207 – 10.167.42.20710.167.42.207
8110.167.42.208/3210.167.42.208 – 10.167.42.20810.167.42.208
8210.167.42.209/3210.167.42.209 – 10.167.42.20910.167.42.209
8310.167.42.210/3210.167.42.210 – 10.167.42.21010.167.42.210
8410.167.42.211/3210.167.42.211 – 10.167.42.21110.167.42.211
8510.167.42.212/3210.167.42.212 – 10.167.42.21210.167.42.212
8610.167.42.213/3210.167.42.213 – 10.167.42.21310.167.42.213
8710.167.42.214/3210.167.42.214 – 10.167.42.21410.167.42.214
8810.167.42.215/3210.167.42.215 – 10.167.42.21510.167.42.215
8910.167.42.216/3210.167.42.216 – 10.167.42.21610.167.42.216
9010.167.42.217/3210.167.42.217 – 10.167.42.21710.167.42.217
9110.167.42.218/3210.167.42.218 – 10.167.42.21810.167.42.218
9210.167.42.219/3210.167.42.219 – 10.167.42.21910.167.42.219
9310.167.42.220/3210.167.42.220 – 10.167.42.22010.167.42.220
9410.167.42.221/3210.167.42.221 – 10.167.42.22110.167.42.221
9510.167.42.222/3210.167.42.222 – 10.167.42.22210.167.42.222
9610.167.42.223/3210.167.42.223 – 10.167.42.22310.167.42.223
9710.167.42.224/3210.167.42.224 – 10.167.42.22410.167.42.224
9810.167.42.225/3210.167.42.225 – 10.167.42.22510.167.42.225
9910.167.42.226/3210.167.42.226 – 10.167.42.22610.167.42.226
10010.167.42.227/3210.167.42.227 – 10.167.42.22710.167.42.227
10110.167.42.228/3210.167.42.228 – 10.167.42.22810.167.42.228
10210.167.42.229/3210.167.42.229 – 10.167.42.22910.167.42.229
10310.167.42.230/3210.167.42.230 – 10.167.42.23010.167.42.230
10410.167.42.231/3210.167.42.231 – 10.167.42.23110.167.42.231
10510.167.42.232/3210.167.42.232 – 10.167.42.23210.167.42.232
10610.167.42.233/3210.167.42.233 – 10.167.42.23310.167.42.233
10710.167.42.234/3210.167.42.234 – 10.167.42.23410.167.42.234
10810.167.42.235/3210.167.42.235 – 10.167.42.23510.167.42.235
10910.167.42.236/3210.167.42.236 – 10.167.42.23610.167.42.236
11010.167.42.237/3210.167.42.237 – 10.167.42.23710.167.42.237
11110.167.42.238/3210.167.42.238 – 10.167.42.23810.167.42.238
11210.167.42.239/3210.167.42.239 – 10.167.42.23910.167.42.239
11310.167.42.240/3210.167.42.240 – 10.167.42.24010.167.42.240
11410.167.42.241/3210.167.42.241 – 10.167.42.24110.167.42.241
11510.167.42.242/3210.167.42.242 – 10.167.42.24210.167.42.242
11610.167.42.243/3210.167.42.243 – 10.167.42.24310.167.42.243
11710.167.42.244/3210.167.42.244 – 10.167.42.24410.167.42.244
11810.167.42.245/3210.167.42.245 – 10.167.42.24510.167.42.245
11910.167.42.246/3210.167.42.246 – 10.167.42.24610.167.42.246
12010.167.42.247/3210.167.42.247 – 10.167.42.24710.167.42.247
12110.167.42.248/3210.167.42.248 – 10.167.42.24810.167.42.248
12210.167.42.249/3210.167.42.249 – 10.167.42.24910.167.42.249
12310.167.42.250/3210.167.42.250 – 10.167.42.25010.167.42.250
12410.167.42.251/3210.167.42.251 – 10.167.42.25110.167.42.251
12510.167.42.252/3210.167.42.252 – 10.167.42.25210.167.42.252
12610.167.42.253/3210.167.42.253 – 10.167.42.25310.167.42.253
12710.167.42.254/3210.167.42.254 – 10.167.42.25410.167.42.254
12810.167.42.255/3210.167.42.255 – 10.167.42.25510.167.42.255
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 →