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)10.167.102.128/25
network10.167.102.128/25
broadcast10.167.102.255
first host10.167.102.129
last host10.167.102.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.167.102.128/25
address00001010.10100111.01100110.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.10100111.01100110.10000000
broadcast00001010.10100111.01100110.11111111
green = network part, grey = host part
hex0x0aa76680
decimal178742912
reverse dns128.102.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:6680

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.167.102.128/3210.167.102.128 – 10.167.102.12810.167.102.128
210.167.102.129/3210.167.102.129 – 10.167.102.12910.167.102.129
310.167.102.130/3210.167.102.130 – 10.167.102.13010.167.102.130
410.167.102.131/3210.167.102.131 – 10.167.102.13110.167.102.131
510.167.102.132/3210.167.102.132 – 10.167.102.13210.167.102.132
610.167.102.133/3210.167.102.133 – 10.167.102.13310.167.102.133
710.167.102.134/3210.167.102.134 – 10.167.102.13410.167.102.134
810.167.102.135/3210.167.102.135 – 10.167.102.13510.167.102.135
910.167.102.136/3210.167.102.136 – 10.167.102.13610.167.102.136
1010.167.102.137/3210.167.102.137 – 10.167.102.13710.167.102.137
1110.167.102.138/3210.167.102.138 – 10.167.102.13810.167.102.138
1210.167.102.139/3210.167.102.139 – 10.167.102.13910.167.102.139
1310.167.102.140/3210.167.102.140 – 10.167.102.14010.167.102.140
1410.167.102.141/3210.167.102.141 – 10.167.102.14110.167.102.141
1510.167.102.142/3210.167.102.142 – 10.167.102.14210.167.102.142
1610.167.102.143/3210.167.102.143 – 10.167.102.14310.167.102.143
1710.167.102.144/3210.167.102.144 – 10.167.102.14410.167.102.144
1810.167.102.145/3210.167.102.145 – 10.167.102.14510.167.102.145
1910.167.102.146/3210.167.102.146 – 10.167.102.14610.167.102.146
2010.167.102.147/3210.167.102.147 – 10.167.102.14710.167.102.147
2110.167.102.148/3210.167.102.148 – 10.167.102.14810.167.102.148
2210.167.102.149/3210.167.102.149 – 10.167.102.14910.167.102.149
2310.167.102.150/3210.167.102.150 – 10.167.102.15010.167.102.150
2410.167.102.151/3210.167.102.151 – 10.167.102.15110.167.102.151
2510.167.102.152/3210.167.102.152 – 10.167.102.15210.167.102.152
2610.167.102.153/3210.167.102.153 – 10.167.102.15310.167.102.153
2710.167.102.154/3210.167.102.154 – 10.167.102.15410.167.102.154
2810.167.102.155/3210.167.102.155 – 10.167.102.15510.167.102.155
2910.167.102.156/3210.167.102.156 – 10.167.102.15610.167.102.156
3010.167.102.157/3210.167.102.157 – 10.167.102.15710.167.102.157
3110.167.102.158/3210.167.102.158 – 10.167.102.15810.167.102.158
3210.167.102.159/3210.167.102.159 – 10.167.102.15910.167.102.159
3310.167.102.160/3210.167.102.160 – 10.167.102.16010.167.102.160
3410.167.102.161/3210.167.102.161 – 10.167.102.16110.167.102.161
3510.167.102.162/3210.167.102.162 – 10.167.102.16210.167.102.162
3610.167.102.163/3210.167.102.163 – 10.167.102.16310.167.102.163
3710.167.102.164/3210.167.102.164 – 10.167.102.16410.167.102.164
3810.167.102.165/3210.167.102.165 – 10.167.102.16510.167.102.165
3910.167.102.166/3210.167.102.166 – 10.167.102.16610.167.102.166
4010.167.102.167/3210.167.102.167 – 10.167.102.16710.167.102.167
4110.167.102.168/3210.167.102.168 – 10.167.102.16810.167.102.168
4210.167.102.169/3210.167.102.169 – 10.167.102.16910.167.102.169
4310.167.102.170/3210.167.102.170 – 10.167.102.17010.167.102.170
4410.167.102.171/3210.167.102.171 – 10.167.102.17110.167.102.171
4510.167.102.172/3210.167.102.172 – 10.167.102.17210.167.102.172
4610.167.102.173/3210.167.102.173 – 10.167.102.17310.167.102.173
4710.167.102.174/3210.167.102.174 – 10.167.102.17410.167.102.174
4810.167.102.175/3210.167.102.175 – 10.167.102.17510.167.102.175
4910.167.102.176/3210.167.102.176 – 10.167.102.17610.167.102.176
5010.167.102.177/3210.167.102.177 – 10.167.102.17710.167.102.177
5110.167.102.178/3210.167.102.178 – 10.167.102.17810.167.102.178
5210.167.102.179/3210.167.102.179 – 10.167.102.17910.167.102.179
5310.167.102.180/3210.167.102.180 – 10.167.102.18010.167.102.180
5410.167.102.181/3210.167.102.181 – 10.167.102.18110.167.102.181
5510.167.102.182/3210.167.102.182 – 10.167.102.18210.167.102.182
5610.167.102.183/3210.167.102.183 – 10.167.102.18310.167.102.183
5710.167.102.184/3210.167.102.184 – 10.167.102.18410.167.102.184
5810.167.102.185/3210.167.102.185 – 10.167.102.18510.167.102.185
5910.167.102.186/3210.167.102.186 – 10.167.102.18610.167.102.186
6010.167.102.187/3210.167.102.187 – 10.167.102.18710.167.102.187
6110.167.102.188/3210.167.102.188 – 10.167.102.18810.167.102.188
6210.167.102.189/3210.167.102.189 – 10.167.102.18910.167.102.189
6310.167.102.190/3210.167.102.190 – 10.167.102.19010.167.102.190
6410.167.102.191/3210.167.102.191 – 10.167.102.19110.167.102.191
6510.167.102.192/3210.167.102.192 – 10.167.102.19210.167.102.192
6610.167.102.193/3210.167.102.193 – 10.167.102.19310.167.102.193
6710.167.102.194/3210.167.102.194 – 10.167.102.19410.167.102.194
6810.167.102.195/3210.167.102.195 – 10.167.102.19510.167.102.195
6910.167.102.196/3210.167.102.196 – 10.167.102.19610.167.102.196
7010.167.102.197/3210.167.102.197 – 10.167.102.19710.167.102.197
7110.167.102.198/3210.167.102.198 – 10.167.102.19810.167.102.198
7210.167.102.199/3210.167.102.199 – 10.167.102.19910.167.102.199
7310.167.102.200/3210.167.102.200 – 10.167.102.20010.167.102.200
7410.167.102.201/3210.167.102.201 – 10.167.102.20110.167.102.201
7510.167.102.202/3210.167.102.202 – 10.167.102.20210.167.102.202
7610.167.102.203/3210.167.102.203 – 10.167.102.20310.167.102.203
7710.167.102.204/3210.167.102.204 – 10.167.102.20410.167.102.204
7810.167.102.205/3210.167.102.205 – 10.167.102.20510.167.102.205
7910.167.102.206/3210.167.102.206 – 10.167.102.20610.167.102.206
8010.167.102.207/3210.167.102.207 – 10.167.102.20710.167.102.207
8110.167.102.208/3210.167.102.208 – 10.167.102.20810.167.102.208
8210.167.102.209/3210.167.102.209 – 10.167.102.20910.167.102.209
8310.167.102.210/3210.167.102.210 – 10.167.102.21010.167.102.210
8410.167.102.211/3210.167.102.211 – 10.167.102.21110.167.102.211
8510.167.102.212/3210.167.102.212 – 10.167.102.21210.167.102.212
8610.167.102.213/3210.167.102.213 – 10.167.102.21310.167.102.213
8710.167.102.214/3210.167.102.214 – 10.167.102.21410.167.102.214
8810.167.102.215/3210.167.102.215 – 10.167.102.21510.167.102.215
8910.167.102.216/3210.167.102.216 – 10.167.102.21610.167.102.216
9010.167.102.217/3210.167.102.217 – 10.167.102.21710.167.102.217
9110.167.102.218/3210.167.102.218 – 10.167.102.21810.167.102.218
9210.167.102.219/3210.167.102.219 – 10.167.102.21910.167.102.219
9310.167.102.220/3210.167.102.220 – 10.167.102.22010.167.102.220
9410.167.102.221/3210.167.102.221 – 10.167.102.22110.167.102.221
9510.167.102.222/3210.167.102.222 – 10.167.102.22210.167.102.222
9610.167.102.223/3210.167.102.223 – 10.167.102.22310.167.102.223
9710.167.102.224/3210.167.102.224 – 10.167.102.22410.167.102.224
9810.167.102.225/3210.167.102.225 – 10.167.102.22510.167.102.225
9910.167.102.226/3210.167.102.226 – 10.167.102.22610.167.102.226
10010.167.102.227/3210.167.102.227 – 10.167.102.22710.167.102.227
10110.167.102.228/3210.167.102.228 – 10.167.102.22810.167.102.228
10210.167.102.229/3210.167.102.229 – 10.167.102.22910.167.102.229
10310.167.102.230/3210.167.102.230 – 10.167.102.23010.167.102.230
10410.167.102.231/3210.167.102.231 – 10.167.102.23110.167.102.231
10510.167.102.232/3210.167.102.232 – 10.167.102.23210.167.102.232
10610.167.102.233/3210.167.102.233 – 10.167.102.23310.167.102.233
10710.167.102.234/3210.167.102.234 – 10.167.102.23410.167.102.234
10810.167.102.235/3210.167.102.235 – 10.167.102.23510.167.102.235
10910.167.102.236/3210.167.102.236 – 10.167.102.23610.167.102.236
11010.167.102.237/3210.167.102.237 – 10.167.102.23710.167.102.237
11110.167.102.238/3210.167.102.238 – 10.167.102.23810.167.102.238
11210.167.102.239/3210.167.102.239 – 10.167.102.23910.167.102.239
11310.167.102.240/3210.167.102.240 – 10.167.102.24010.167.102.240
11410.167.102.241/3210.167.102.241 – 10.167.102.24110.167.102.241
11510.167.102.242/3210.167.102.242 – 10.167.102.24210.167.102.242
11610.167.102.243/3210.167.102.243 – 10.167.102.24310.167.102.243
11710.167.102.244/3210.167.102.244 – 10.167.102.24410.167.102.244
11810.167.102.245/3210.167.102.245 – 10.167.102.24510.167.102.245
11910.167.102.246/3210.167.102.246 – 10.167.102.24610.167.102.246
12010.167.102.247/3210.167.102.247 – 10.167.102.24710.167.102.247
12110.167.102.248/3210.167.102.248 – 10.167.102.24810.167.102.248
12210.167.102.249/3210.167.102.249 – 10.167.102.24910.167.102.249
12310.167.102.250/3210.167.102.250 – 10.167.102.25010.167.102.250
12410.167.102.251/3210.167.102.251 – 10.167.102.25110.167.102.251
12510.167.102.252/3210.167.102.252 – 10.167.102.25210.167.102.252
12610.167.102.253/3210.167.102.253 – 10.167.102.25310.167.102.253
12710.167.102.254/3210.167.102.254 – 10.167.102.25410.167.102.254
12810.167.102.255/3210.167.102.255 – 10.167.102.25510.167.102.255
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 →