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)10.167.120.128/25
network10.167.120.128/25
broadcast10.167.120.255
first host10.167.120.129
last host10.167.120.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.120.128/25
address00001010.10100111.01111000.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01111000.10000000
broadcast00001010.10100111.01111000.11111111
green = network part, grey = host part
hex0x0aa77880
decimal178747520
reverse dns128.120.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:7880

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.120.128/3210.167.120.128 – 10.167.120.12810.167.120.128
210.167.120.129/3210.167.120.129 – 10.167.120.12910.167.120.129
310.167.120.130/3210.167.120.130 – 10.167.120.13010.167.120.130
410.167.120.131/3210.167.120.131 – 10.167.120.13110.167.120.131
510.167.120.132/3210.167.120.132 – 10.167.120.13210.167.120.132
610.167.120.133/3210.167.120.133 – 10.167.120.13310.167.120.133
710.167.120.134/3210.167.120.134 – 10.167.120.13410.167.120.134
810.167.120.135/3210.167.120.135 – 10.167.120.13510.167.120.135
910.167.120.136/3210.167.120.136 – 10.167.120.13610.167.120.136
1010.167.120.137/3210.167.120.137 – 10.167.120.13710.167.120.137
1110.167.120.138/3210.167.120.138 – 10.167.120.13810.167.120.138
1210.167.120.139/3210.167.120.139 – 10.167.120.13910.167.120.139
1310.167.120.140/3210.167.120.140 – 10.167.120.14010.167.120.140
1410.167.120.141/3210.167.120.141 – 10.167.120.14110.167.120.141
1510.167.120.142/3210.167.120.142 – 10.167.120.14210.167.120.142
1610.167.120.143/3210.167.120.143 – 10.167.120.14310.167.120.143
1710.167.120.144/3210.167.120.144 – 10.167.120.14410.167.120.144
1810.167.120.145/3210.167.120.145 – 10.167.120.14510.167.120.145
1910.167.120.146/3210.167.120.146 – 10.167.120.14610.167.120.146
2010.167.120.147/3210.167.120.147 – 10.167.120.14710.167.120.147
2110.167.120.148/3210.167.120.148 – 10.167.120.14810.167.120.148
2210.167.120.149/3210.167.120.149 – 10.167.120.14910.167.120.149
2310.167.120.150/3210.167.120.150 – 10.167.120.15010.167.120.150
2410.167.120.151/3210.167.120.151 – 10.167.120.15110.167.120.151
2510.167.120.152/3210.167.120.152 – 10.167.120.15210.167.120.152
2610.167.120.153/3210.167.120.153 – 10.167.120.15310.167.120.153
2710.167.120.154/3210.167.120.154 – 10.167.120.15410.167.120.154
2810.167.120.155/3210.167.120.155 – 10.167.120.15510.167.120.155
2910.167.120.156/3210.167.120.156 – 10.167.120.15610.167.120.156
3010.167.120.157/3210.167.120.157 – 10.167.120.15710.167.120.157
3110.167.120.158/3210.167.120.158 – 10.167.120.15810.167.120.158
3210.167.120.159/3210.167.120.159 – 10.167.120.15910.167.120.159
3310.167.120.160/3210.167.120.160 – 10.167.120.16010.167.120.160
3410.167.120.161/3210.167.120.161 – 10.167.120.16110.167.120.161
3510.167.120.162/3210.167.120.162 – 10.167.120.16210.167.120.162
3610.167.120.163/3210.167.120.163 – 10.167.120.16310.167.120.163
3710.167.120.164/3210.167.120.164 – 10.167.120.16410.167.120.164
3810.167.120.165/3210.167.120.165 – 10.167.120.16510.167.120.165
3910.167.120.166/3210.167.120.166 – 10.167.120.16610.167.120.166
4010.167.120.167/3210.167.120.167 – 10.167.120.16710.167.120.167
4110.167.120.168/3210.167.120.168 – 10.167.120.16810.167.120.168
4210.167.120.169/3210.167.120.169 – 10.167.120.16910.167.120.169
4310.167.120.170/3210.167.120.170 – 10.167.120.17010.167.120.170
4410.167.120.171/3210.167.120.171 – 10.167.120.17110.167.120.171
4510.167.120.172/3210.167.120.172 – 10.167.120.17210.167.120.172
4610.167.120.173/3210.167.120.173 – 10.167.120.17310.167.120.173
4710.167.120.174/3210.167.120.174 – 10.167.120.17410.167.120.174
4810.167.120.175/3210.167.120.175 – 10.167.120.17510.167.120.175
4910.167.120.176/3210.167.120.176 – 10.167.120.17610.167.120.176
5010.167.120.177/3210.167.120.177 – 10.167.120.17710.167.120.177
5110.167.120.178/3210.167.120.178 – 10.167.120.17810.167.120.178
5210.167.120.179/3210.167.120.179 – 10.167.120.17910.167.120.179
5310.167.120.180/3210.167.120.180 – 10.167.120.18010.167.120.180
5410.167.120.181/3210.167.120.181 – 10.167.120.18110.167.120.181
5510.167.120.182/3210.167.120.182 – 10.167.120.18210.167.120.182
5610.167.120.183/3210.167.120.183 – 10.167.120.18310.167.120.183
5710.167.120.184/3210.167.120.184 – 10.167.120.18410.167.120.184
5810.167.120.185/3210.167.120.185 – 10.167.120.18510.167.120.185
5910.167.120.186/3210.167.120.186 – 10.167.120.18610.167.120.186
6010.167.120.187/3210.167.120.187 – 10.167.120.18710.167.120.187
6110.167.120.188/3210.167.120.188 – 10.167.120.18810.167.120.188
6210.167.120.189/3210.167.120.189 – 10.167.120.18910.167.120.189
6310.167.120.190/3210.167.120.190 – 10.167.120.19010.167.120.190
6410.167.120.191/3210.167.120.191 – 10.167.120.19110.167.120.191
6510.167.120.192/3210.167.120.192 – 10.167.120.19210.167.120.192
6610.167.120.193/3210.167.120.193 – 10.167.120.19310.167.120.193
6710.167.120.194/3210.167.120.194 – 10.167.120.19410.167.120.194
6810.167.120.195/3210.167.120.195 – 10.167.120.19510.167.120.195
6910.167.120.196/3210.167.120.196 – 10.167.120.19610.167.120.196
7010.167.120.197/3210.167.120.197 – 10.167.120.19710.167.120.197
7110.167.120.198/3210.167.120.198 – 10.167.120.19810.167.120.198
7210.167.120.199/3210.167.120.199 – 10.167.120.19910.167.120.199
7310.167.120.200/3210.167.120.200 – 10.167.120.20010.167.120.200
7410.167.120.201/3210.167.120.201 – 10.167.120.20110.167.120.201
7510.167.120.202/3210.167.120.202 – 10.167.120.20210.167.120.202
7610.167.120.203/3210.167.120.203 – 10.167.120.20310.167.120.203
7710.167.120.204/3210.167.120.204 – 10.167.120.20410.167.120.204
7810.167.120.205/3210.167.120.205 – 10.167.120.20510.167.120.205
7910.167.120.206/3210.167.120.206 – 10.167.120.20610.167.120.206
8010.167.120.207/3210.167.120.207 – 10.167.120.20710.167.120.207
8110.167.120.208/3210.167.120.208 – 10.167.120.20810.167.120.208
8210.167.120.209/3210.167.120.209 – 10.167.120.20910.167.120.209
8310.167.120.210/3210.167.120.210 – 10.167.120.21010.167.120.210
8410.167.120.211/3210.167.120.211 – 10.167.120.21110.167.120.211
8510.167.120.212/3210.167.120.212 – 10.167.120.21210.167.120.212
8610.167.120.213/3210.167.120.213 – 10.167.120.21310.167.120.213
8710.167.120.214/3210.167.120.214 – 10.167.120.21410.167.120.214
8810.167.120.215/3210.167.120.215 – 10.167.120.21510.167.120.215
8910.167.120.216/3210.167.120.216 – 10.167.120.21610.167.120.216
9010.167.120.217/3210.167.120.217 – 10.167.120.21710.167.120.217
9110.167.120.218/3210.167.120.218 – 10.167.120.21810.167.120.218
9210.167.120.219/3210.167.120.219 – 10.167.120.21910.167.120.219
9310.167.120.220/3210.167.120.220 – 10.167.120.22010.167.120.220
9410.167.120.221/3210.167.120.221 – 10.167.120.22110.167.120.221
9510.167.120.222/3210.167.120.222 – 10.167.120.22210.167.120.222
9610.167.120.223/3210.167.120.223 – 10.167.120.22310.167.120.223
9710.167.120.224/3210.167.120.224 – 10.167.120.22410.167.120.224
9810.167.120.225/3210.167.120.225 – 10.167.120.22510.167.120.225
9910.167.120.226/3210.167.120.226 – 10.167.120.22610.167.120.226
10010.167.120.227/3210.167.120.227 – 10.167.120.22710.167.120.227
10110.167.120.228/3210.167.120.228 – 10.167.120.22810.167.120.228
10210.167.120.229/3210.167.120.229 – 10.167.120.22910.167.120.229
10310.167.120.230/3210.167.120.230 – 10.167.120.23010.167.120.230
10410.167.120.231/3210.167.120.231 – 10.167.120.23110.167.120.231
10510.167.120.232/3210.167.120.232 – 10.167.120.23210.167.120.232
10610.167.120.233/3210.167.120.233 – 10.167.120.23310.167.120.233
10710.167.120.234/3210.167.120.234 – 10.167.120.23410.167.120.234
10810.167.120.235/3210.167.120.235 – 10.167.120.23510.167.120.235
10910.167.120.236/3210.167.120.236 – 10.167.120.23610.167.120.236
11010.167.120.237/3210.167.120.237 – 10.167.120.23710.167.120.237
11110.167.120.238/3210.167.120.238 – 10.167.120.23810.167.120.238
11210.167.120.239/3210.167.120.239 – 10.167.120.23910.167.120.239
11310.167.120.240/3210.167.120.240 – 10.167.120.24010.167.120.240
11410.167.120.241/3210.167.120.241 – 10.167.120.24110.167.120.241
11510.167.120.242/3210.167.120.242 – 10.167.120.24210.167.120.242
11610.167.120.243/3210.167.120.243 – 10.167.120.24310.167.120.243
11710.167.120.244/3210.167.120.244 – 10.167.120.24410.167.120.244
11810.167.120.245/3210.167.120.245 – 10.167.120.24510.167.120.245
11910.167.120.246/3210.167.120.246 – 10.167.120.24610.167.120.246
12010.167.120.247/3210.167.120.247 – 10.167.120.24710.167.120.247
12110.167.120.248/3210.167.120.248 – 10.167.120.24810.167.120.248
12210.167.120.249/3210.167.120.249 – 10.167.120.24910.167.120.249
12310.167.120.250/3210.167.120.250 – 10.167.120.25010.167.120.250
12410.167.120.251/3210.167.120.251 – 10.167.120.25110.167.120.251
12510.167.120.252/3210.167.120.252 – 10.167.120.25210.167.120.252
12610.167.120.253/3210.167.120.253 – 10.167.120.25310.167.120.253
12710.167.120.254/3210.167.120.254 – 10.167.120.25410.167.120.254
12810.167.120.255/3210.167.120.255 – 10.167.120.25510.167.120.255
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 →