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)10.167.80.128/25
network10.167.80.128/25
broadcast10.167.80.255
first host10.167.80.129
last host10.167.80.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.80.128/25
address00001010.10100111.01010000.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01010000.10000000
broadcast00001010.10100111.01010000.11111111
green = network part, grey = host part
hex0x0aa75080
decimal178737280
reverse dns128.80.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:5080

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.80.128/3210.167.80.128 – 10.167.80.12810.167.80.128
210.167.80.129/3210.167.80.129 – 10.167.80.12910.167.80.129
310.167.80.130/3210.167.80.130 – 10.167.80.13010.167.80.130
410.167.80.131/3210.167.80.131 – 10.167.80.13110.167.80.131
510.167.80.132/3210.167.80.132 – 10.167.80.13210.167.80.132
610.167.80.133/3210.167.80.133 – 10.167.80.13310.167.80.133
710.167.80.134/3210.167.80.134 – 10.167.80.13410.167.80.134
810.167.80.135/3210.167.80.135 – 10.167.80.13510.167.80.135
910.167.80.136/3210.167.80.136 – 10.167.80.13610.167.80.136
1010.167.80.137/3210.167.80.137 – 10.167.80.13710.167.80.137
1110.167.80.138/3210.167.80.138 – 10.167.80.13810.167.80.138
1210.167.80.139/3210.167.80.139 – 10.167.80.13910.167.80.139
1310.167.80.140/3210.167.80.140 – 10.167.80.14010.167.80.140
1410.167.80.141/3210.167.80.141 – 10.167.80.14110.167.80.141
1510.167.80.142/3210.167.80.142 – 10.167.80.14210.167.80.142
1610.167.80.143/3210.167.80.143 – 10.167.80.14310.167.80.143
1710.167.80.144/3210.167.80.144 – 10.167.80.14410.167.80.144
1810.167.80.145/3210.167.80.145 – 10.167.80.14510.167.80.145
1910.167.80.146/3210.167.80.146 – 10.167.80.14610.167.80.146
2010.167.80.147/3210.167.80.147 – 10.167.80.14710.167.80.147
2110.167.80.148/3210.167.80.148 – 10.167.80.14810.167.80.148
2210.167.80.149/3210.167.80.149 – 10.167.80.14910.167.80.149
2310.167.80.150/3210.167.80.150 – 10.167.80.15010.167.80.150
2410.167.80.151/3210.167.80.151 – 10.167.80.15110.167.80.151
2510.167.80.152/3210.167.80.152 – 10.167.80.15210.167.80.152
2610.167.80.153/3210.167.80.153 – 10.167.80.15310.167.80.153
2710.167.80.154/3210.167.80.154 – 10.167.80.15410.167.80.154
2810.167.80.155/3210.167.80.155 – 10.167.80.15510.167.80.155
2910.167.80.156/3210.167.80.156 – 10.167.80.15610.167.80.156
3010.167.80.157/3210.167.80.157 – 10.167.80.15710.167.80.157
3110.167.80.158/3210.167.80.158 – 10.167.80.15810.167.80.158
3210.167.80.159/3210.167.80.159 – 10.167.80.15910.167.80.159
3310.167.80.160/3210.167.80.160 – 10.167.80.16010.167.80.160
3410.167.80.161/3210.167.80.161 – 10.167.80.16110.167.80.161
3510.167.80.162/3210.167.80.162 – 10.167.80.16210.167.80.162
3610.167.80.163/3210.167.80.163 – 10.167.80.16310.167.80.163
3710.167.80.164/3210.167.80.164 – 10.167.80.16410.167.80.164
3810.167.80.165/3210.167.80.165 – 10.167.80.16510.167.80.165
3910.167.80.166/3210.167.80.166 – 10.167.80.16610.167.80.166
4010.167.80.167/3210.167.80.167 – 10.167.80.16710.167.80.167
4110.167.80.168/3210.167.80.168 – 10.167.80.16810.167.80.168
4210.167.80.169/3210.167.80.169 – 10.167.80.16910.167.80.169
4310.167.80.170/3210.167.80.170 – 10.167.80.17010.167.80.170
4410.167.80.171/3210.167.80.171 – 10.167.80.17110.167.80.171
4510.167.80.172/3210.167.80.172 – 10.167.80.17210.167.80.172
4610.167.80.173/3210.167.80.173 – 10.167.80.17310.167.80.173
4710.167.80.174/3210.167.80.174 – 10.167.80.17410.167.80.174
4810.167.80.175/3210.167.80.175 – 10.167.80.17510.167.80.175
4910.167.80.176/3210.167.80.176 – 10.167.80.17610.167.80.176
5010.167.80.177/3210.167.80.177 – 10.167.80.17710.167.80.177
5110.167.80.178/3210.167.80.178 – 10.167.80.17810.167.80.178
5210.167.80.179/3210.167.80.179 – 10.167.80.17910.167.80.179
5310.167.80.180/3210.167.80.180 – 10.167.80.18010.167.80.180
5410.167.80.181/3210.167.80.181 – 10.167.80.18110.167.80.181
5510.167.80.182/3210.167.80.182 – 10.167.80.18210.167.80.182
5610.167.80.183/3210.167.80.183 – 10.167.80.18310.167.80.183
5710.167.80.184/3210.167.80.184 – 10.167.80.18410.167.80.184
5810.167.80.185/3210.167.80.185 – 10.167.80.18510.167.80.185
5910.167.80.186/3210.167.80.186 – 10.167.80.18610.167.80.186
6010.167.80.187/3210.167.80.187 – 10.167.80.18710.167.80.187
6110.167.80.188/3210.167.80.188 – 10.167.80.18810.167.80.188
6210.167.80.189/3210.167.80.189 – 10.167.80.18910.167.80.189
6310.167.80.190/3210.167.80.190 – 10.167.80.19010.167.80.190
6410.167.80.191/3210.167.80.191 – 10.167.80.19110.167.80.191
6510.167.80.192/3210.167.80.192 – 10.167.80.19210.167.80.192
6610.167.80.193/3210.167.80.193 – 10.167.80.19310.167.80.193
6710.167.80.194/3210.167.80.194 – 10.167.80.19410.167.80.194
6810.167.80.195/3210.167.80.195 – 10.167.80.19510.167.80.195
6910.167.80.196/3210.167.80.196 – 10.167.80.19610.167.80.196
7010.167.80.197/3210.167.80.197 – 10.167.80.19710.167.80.197
7110.167.80.198/3210.167.80.198 – 10.167.80.19810.167.80.198
7210.167.80.199/3210.167.80.199 – 10.167.80.19910.167.80.199
7310.167.80.200/3210.167.80.200 – 10.167.80.20010.167.80.200
7410.167.80.201/3210.167.80.201 – 10.167.80.20110.167.80.201
7510.167.80.202/3210.167.80.202 – 10.167.80.20210.167.80.202
7610.167.80.203/3210.167.80.203 – 10.167.80.20310.167.80.203
7710.167.80.204/3210.167.80.204 – 10.167.80.20410.167.80.204
7810.167.80.205/3210.167.80.205 – 10.167.80.20510.167.80.205
7910.167.80.206/3210.167.80.206 – 10.167.80.20610.167.80.206
8010.167.80.207/3210.167.80.207 – 10.167.80.20710.167.80.207
8110.167.80.208/3210.167.80.208 – 10.167.80.20810.167.80.208
8210.167.80.209/3210.167.80.209 – 10.167.80.20910.167.80.209
8310.167.80.210/3210.167.80.210 – 10.167.80.21010.167.80.210
8410.167.80.211/3210.167.80.211 – 10.167.80.21110.167.80.211
8510.167.80.212/3210.167.80.212 – 10.167.80.21210.167.80.212
8610.167.80.213/3210.167.80.213 – 10.167.80.21310.167.80.213
8710.167.80.214/3210.167.80.214 – 10.167.80.21410.167.80.214
8810.167.80.215/3210.167.80.215 – 10.167.80.21510.167.80.215
8910.167.80.216/3210.167.80.216 – 10.167.80.21610.167.80.216
9010.167.80.217/3210.167.80.217 – 10.167.80.21710.167.80.217
9110.167.80.218/3210.167.80.218 – 10.167.80.21810.167.80.218
9210.167.80.219/3210.167.80.219 – 10.167.80.21910.167.80.219
9310.167.80.220/3210.167.80.220 – 10.167.80.22010.167.80.220
9410.167.80.221/3210.167.80.221 – 10.167.80.22110.167.80.221
9510.167.80.222/3210.167.80.222 – 10.167.80.22210.167.80.222
9610.167.80.223/3210.167.80.223 – 10.167.80.22310.167.80.223
9710.167.80.224/3210.167.80.224 – 10.167.80.22410.167.80.224
9810.167.80.225/3210.167.80.225 – 10.167.80.22510.167.80.225
9910.167.80.226/3210.167.80.226 – 10.167.80.22610.167.80.226
10010.167.80.227/3210.167.80.227 – 10.167.80.22710.167.80.227
10110.167.80.228/3210.167.80.228 – 10.167.80.22810.167.80.228
10210.167.80.229/3210.167.80.229 – 10.167.80.22910.167.80.229
10310.167.80.230/3210.167.80.230 – 10.167.80.23010.167.80.230
10410.167.80.231/3210.167.80.231 – 10.167.80.23110.167.80.231
10510.167.80.232/3210.167.80.232 – 10.167.80.23210.167.80.232
10610.167.80.233/3210.167.80.233 – 10.167.80.23310.167.80.233
10710.167.80.234/3210.167.80.234 – 10.167.80.23410.167.80.234
10810.167.80.235/3210.167.80.235 – 10.167.80.23510.167.80.235
10910.167.80.236/3210.167.80.236 – 10.167.80.23610.167.80.236
11010.167.80.237/3210.167.80.237 – 10.167.80.23710.167.80.237
11110.167.80.238/3210.167.80.238 – 10.167.80.23810.167.80.238
11210.167.80.239/3210.167.80.239 – 10.167.80.23910.167.80.239
11310.167.80.240/3210.167.80.240 – 10.167.80.24010.167.80.240
11410.167.80.241/3210.167.80.241 – 10.167.80.24110.167.80.241
11510.167.80.242/3210.167.80.242 – 10.167.80.24210.167.80.242
11610.167.80.243/3210.167.80.243 – 10.167.80.24310.167.80.243
11710.167.80.244/3210.167.80.244 – 10.167.80.24410.167.80.244
11810.167.80.245/3210.167.80.245 – 10.167.80.24510.167.80.245
11910.167.80.246/3210.167.80.246 – 10.167.80.24610.167.80.246
12010.167.80.247/3210.167.80.247 – 10.167.80.24710.167.80.247
12110.167.80.248/3210.167.80.248 – 10.167.80.24810.167.80.248
12210.167.80.249/3210.167.80.249 – 10.167.80.24910.167.80.249
12310.167.80.250/3210.167.80.250 – 10.167.80.25010.167.80.250
12410.167.80.251/3210.167.80.251 – 10.167.80.25110.167.80.251
12510.167.80.252/3210.167.80.252 – 10.167.80.25210.167.80.252
12610.167.80.253/3210.167.80.253 – 10.167.80.25310.167.80.253
12710.167.80.254/3210.167.80.254 – 10.167.80.25410.167.80.254
12810.167.80.255/3210.167.80.255 – 10.167.80.25510.167.80.255
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 →