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
private IP (RFC 1918)10.167.55.128/25
network10.167.55.128/25
broadcast10.167.55.255
first host10.167.55.129
last host10.167.55.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.55.128/25
address00001010.10100111.00110111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.00110111.10000000
broadcast00001010.10100111.00110111.11111111
green = network part, grey = host part
hex0x0aa73780
decimal178730880
reverse dns128.55.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:3780

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.55.128/3210.167.55.128 – 10.167.55.12810.167.55.128
210.167.55.129/3210.167.55.129 – 10.167.55.12910.167.55.129
310.167.55.130/3210.167.55.130 – 10.167.55.13010.167.55.130
410.167.55.131/3210.167.55.131 – 10.167.55.13110.167.55.131
510.167.55.132/3210.167.55.132 – 10.167.55.13210.167.55.132
610.167.55.133/3210.167.55.133 – 10.167.55.13310.167.55.133
710.167.55.134/3210.167.55.134 – 10.167.55.13410.167.55.134
810.167.55.135/3210.167.55.135 – 10.167.55.13510.167.55.135
910.167.55.136/3210.167.55.136 – 10.167.55.13610.167.55.136
1010.167.55.137/3210.167.55.137 – 10.167.55.13710.167.55.137
1110.167.55.138/3210.167.55.138 – 10.167.55.13810.167.55.138
1210.167.55.139/3210.167.55.139 – 10.167.55.13910.167.55.139
1310.167.55.140/3210.167.55.140 – 10.167.55.14010.167.55.140
1410.167.55.141/3210.167.55.141 – 10.167.55.14110.167.55.141
1510.167.55.142/3210.167.55.142 – 10.167.55.14210.167.55.142
1610.167.55.143/3210.167.55.143 – 10.167.55.14310.167.55.143
1710.167.55.144/3210.167.55.144 – 10.167.55.14410.167.55.144
1810.167.55.145/3210.167.55.145 – 10.167.55.14510.167.55.145
1910.167.55.146/3210.167.55.146 – 10.167.55.14610.167.55.146
2010.167.55.147/3210.167.55.147 – 10.167.55.14710.167.55.147
2110.167.55.148/3210.167.55.148 – 10.167.55.14810.167.55.148
2210.167.55.149/3210.167.55.149 – 10.167.55.14910.167.55.149
2310.167.55.150/3210.167.55.150 – 10.167.55.15010.167.55.150
2410.167.55.151/3210.167.55.151 – 10.167.55.15110.167.55.151
2510.167.55.152/3210.167.55.152 – 10.167.55.15210.167.55.152
2610.167.55.153/3210.167.55.153 – 10.167.55.15310.167.55.153
2710.167.55.154/3210.167.55.154 – 10.167.55.15410.167.55.154
2810.167.55.155/3210.167.55.155 – 10.167.55.15510.167.55.155
2910.167.55.156/3210.167.55.156 – 10.167.55.15610.167.55.156
3010.167.55.157/3210.167.55.157 – 10.167.55.15710.167.55.157
3110.167.55.158/3210.167.55.158 – 10.167.55.15810.167.55.158
3210.167.55.159/3210.167.55.159 – 10.167.55.15910.167.55.159
3310.167.55.160/3210.167.55.160 – 10.167.55.16010.167.55.160
3410.167.55.161/3210.167.55.161 – 10.167.55.16110.167.55.161
3510.167.55.162/3210.167.55.162 – 10.167.55.16210.167.55.162
3610.167.55.163/3210.167.55.163 – 10.167.55.16310.167.55.163
3710.167.55.164/3210.167.55.164 – 10.167.55.16410.167.55.164
3810.167.55.165/3210.167.55.165 – 10.167.55.16510.167.55.165
3910.167.55.166/3210.167.55.166 – 10.167.55.16610.167.55.166
4010.167.55.167/3210.167.55.167 – 10.167.55.16710.167.55.167
4110.167.55.168/3210.167.55.168 – 10.167.55.16810.167.55.168
4210.167.55.169/3210.167.55.169 – 10.167.55.16910.167.55.169
4310.167.55.170/3210.167.55.170 – 10.167.55.17010.167.55.170
4410.167.55.171/3210.167.55.171 – 10.167.55.17110.167.55.171
4510.167.55.172/3210.167.55.172 – 10.167.55.17210.167.55.172
4610.167.55.173/3210.167.55.173 – 10.167.55.17310.167.55.173
4710.167.55.174/3210.167.55.174 – 10.167.55.17410.167.55.174
4810.167.55.175/3210.167.55.175 – 10.167.55.17510.167.55.175
4910.167.55.176/3210.167.55.176 – 10.167.55.17610.167.55.176
5010.167.55.177/3210.167.55.177 – 10.167.55.17710.167.55.177
5110.167.55.178/3210.167.55.178 – 10.167.55.17810.167.55.178
5210.167.55.179/3210.167.55.179 – 10.167.55.17910.167.55.179
5310.167.55.180/3210.167.55.180 – 10.167.55.18010.167.55.180
5410.167.55.181/3210.167.55.181 – 10.167.55.18110.167.55.181
5510.167.55.182/3210.167.55.182 – 10.167.55.18210.167.55.182
5610.167.55.183/3210.167.55.183 – 10.167.55.18310.167.55.183
5710.167.55.184/3210.167.55.184 – 10.167.55.18410.167.55.184
5810.167.55.185/3210.167.55.185 – 10.167.55.18510.167.55.185
5910.167.55.186/3210.167.55.186 – 10.167.55.18610.167.55.186
6010.167.55.187/3210.167.55.187 – 10.167.55.18710.167.55.187
6110.167.55.188/3210.167.55.188 – 10.167.55.18810.167.55.188
6210.167.55.189/3210.167.55.189 – 10.167.55.18910.167.55.189
6310.167.55.190/3210.167.55.190 – 10.167.55.19010.167.55.190
6410.167.55.191/3210.167.55.191 – 10.167.55.19110.167.55.191
6510.167.55.192/3210.167.55.192 – 10.167.55.19210.167.55.192
6610.167.55.193/3210.167.55.193 – 10.167.55.19310.167.55.193
6710.167.55.194/3210.167.55.194 – 10.167.55.19410.167.55.194
6810.167.55.195/3210.167.55.195 – 10.167.55.19510.167.55.195
6910.167.55.196/3210.167.55.196 – 10.167.55.19610.167.55.196
7010.167.55.197/3210.167.55.197 – 10.167.55.19710.167.55.197
7110.167.55.198/3210.167.55.198 – 10.167.55.19810.167.55.198
7210.167.55.199/3210.167.55.199 – 10.167.55.19910.167.55.199
7310.167.55.200/3210.167.55.200 – 10.167.55.20010.167.55.200
7410.167.55.201/3210.167.55.201 – 10.167.55.20110.167.55.201
7510.167.55.202/3210.167.55.202 – 10.167.55.20210.167.55.202
7610.167.55.203/3210.167.55.203 – 10.167.55.20310.167.55.203
7710.167.55.204/3210.167.55.204 – 10.167.55.20410.167.55.204
7810.167.55.205/3210.167.55.205 – 10.167.55.20510.167.55.205
7910.167.55.206/3210.167.55.206 – 10.167.55.20610.167.55.206
8010.167.55.207/3210.167.55.207 – 10.167.55.20710.167.55.207
8110.167.55.208/3210.167.55.208 – 10.167.55.20810.167.55.208
8210.167.55.209/3210.167.55.209 – 10.167.55.20910.167.55.209
8310.167.55.210/3210.167.55.210 – 10.167.55.21010.167.55.210
8410.167.55.211/3210.167.55.211 – 10.167.55.21110.167.55.211
8510.167.55.212/3210.167.55.212 – 10.167.55.21210.167.55.212
8610.167.55.213/3210.167.55.213 – 10.167.55.21310.167.55.213
8710.167.55.214/3210.167.55.214 – 10.167.55.21410.167.55.214
8810.167.55.215/3210.167.55.215 – 10.167.55.21510.167.55.215
8910.167.55.216/3210.167.55.216 – 10.167.55.21610.167.55.216
9010.167.55.217/3210.167.55.217 – 10.167.55.21710.167.55.217
9110.167.55.218/3210.167.55.218 – 10.167.55.21810.167.55.218
9210.167.55.219/3210.167.55.219 – 10.167.55.21910.167.55.219
9310.167.55.220/3210.167.55.220 – 10.167.55.22010.167.55.220
9410.167.55.221/3210.167.55.221 – 10.167.55.22110.167.55.221
9510.167.55.222/3210.167.55.222 – 10.167.55.22210.167.55.222
9610.167.55.223/3210.167.55.223 – 10.167.55.22310.167.55.223
9710.167.55.224/3210.167.55.224 – 10.167.55.22410.167.55.224
9810.167.55.225/3210.167.55.225 – 10.167.55.22510.167.55.225
9910.167.55.226/3210.167.55.226 – 10.167.55.22610.167.55.226
10010.167.55.227/3210.167.55.227 – 10.167.55.22710.167.55.227
10110.167.55.228/3210.167.55.228 – 10.167.55.22810.167.55.228
10210.167.55.229/3210.167.55.229 – 10.167.55.22910.167.55.229
10310.167.55.230/3210.167.55.230 – 10.167.55.23010.167.55.230
10410.167.55.231/3210.167.55.231 – 10.167.55.23110.167.55.231
10510.167.55.232/3210.167.55.232 – 10.167.55.23210.167.55.232
10610.167.55.233/3210.167.55.233 – 10.167.55.23310.167.55.233
10710.167.55.234/3210.167.55.234 – 10.167.55.23410.167.55.234
10810.167.55.235/3210.167.55.235 – 10.167.55.23510.167.55.235
10910.167.55.236/3210.167.55.236 – 10.167.55.23610.167.55.236
11010.167.55.237/3210.167.55.237 – 10.167.55.23710.167.55.237
11110.167.55.238/3210.167.55.238 – 10.167.55.23810.167.55.238
11210.167.55.239/3210.167.55.239 – 10.167.55.23910.167.55.239
11310.167.55.240/3210.167.55.240 – 10.167.55.24010.167.55.240
11410.167.55.241/3210.167.55.241 – 10.167.55.24110.167.55.241
11510.167.55.242/3210.167.55.242 – 10.167.55.24210.167.55.242
11610.167.55.243/3210.167.55.243 – 10.167.55.24310.167.55.243
11710.167.55.244/3210.167.55.244 – 10.167.55.24410.167.55.244
11810.167.55.245/3210.167.55.245 – 10.167.55.24510.167.55.245
11910.167.55.246/3210.167.55.246 – 10.167.55.24610.167.55.246
12010.167.55.247/3210.167.55.247 – 10.167.55.24710.167.55.247
12110.167.55.248/3210.167.55.248 – 10.167.55.24810.167.55.248
12210.167.55.249/3210.167.55.249 – 10.167.55.24910.167.55.249
12310.167.55.250/3210.167.55.250 – 10.167.55.25010.167.55.250
12410.167.55.251/3210.167.55.251 – 10.167.55.25110.167.55.251
12510.167.55.252/3210.167.55.252 – 10.167.55.25210.167.55.252
12610.167.55.253/3210.167.55.253 – 10.167.55.25310.167.55.253
12710.167.55.254/3210.167.55.254 – 10.167.55.25410.167.55.254
12810.167.55.255/3210.167.55.255 – 10.167.55.25510.167.55.255
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 →