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)10.78.151.128/25
network10.78.151.128/25
broadcast10.78.151.255
first host10.78.151.129
last host10.78.151.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.151.128/25
address00001010.01001110.10010111.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.10010111.10000000
broadcast00001010.01001110.10010111.11111111
green = network part, grey = host part
hex0x0a4e9780
decimal172922752
reverse dns128.151.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:9780

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.151.128/3210.78.151.128 – 10.78.151.12810.78.151.128
210.78.151.129/3210.78.151.129 – 10.78.151.12910.78.151.129
310.78.151.130/3210.78.151.130 – 10.78.151.13010.78.151.130
410.78.151.131/3210.78.151.131 – 10.78.151.13110.78.151.131
510.78.151.132/3210.78.151.132 – 10.78.151.13210.78.151.132
610.78.151.133/3210.78.151.133 – 10.78.151.13310.78.151.133
710.78.151.134/3210.78.151.134 – 10.78.151.13410.78.151.134
810.78.151.135/3210.78.151.135 – 10.78.151.13510.78.151.135
910.78.151.136/3210.78.151.136 – 10.78.151.13610.78.151.136
1010.78.151.137/3210.78.151.137 – 10.78.151.13710.78.151.137
1110.78.151.138/3210.78.151.138 – 10.78.151.13810.78.151.138
1210.78.151.139/3210.78.151.139 – 10.78.151.13910.78.151.139
1310.78.151.140/3210.78.151.140 – 10.78.151.14010.78.151.140
1410.78.151.141/3210.78.151.141 – 10.78.151.14110.78.151.141
1510.78.151.142/3210.78.151.142 – 10.78.151.14210.78.151.142
1610.78.151.143/3210.78.151.143 – 10.78.151.14310.78.151.143
1710.78.151.144/3210.78.151.144 – 10.78.151.14410.78.151.144
1810.78.151.145/3210.78.151.145 – 10.78.151.14510.78.151.145
1910.78.151.146/3210.78.151.146 – 10.78.151.14610.78.151.146
2010.78.151.147/3210.78.151.147 – 10.78.151.14710.78.151.147
2110.78.151.148/3210.78.151.148 – 10.78.151.14810.78.151.148
2210.78.151.149/3210.78.151.149 – 10.78.151.14910.78.151.149
2310.78.151.150/3210.78.151.150 – 10.78.151.15010.78.151.150
2410.78.151.151/3210.78.151.151 – 10.78.151.15110.78.151.151
2510.78.151.152/3210.78.151.152 – 10.78.151.15210.78.151.152
2610.78.151.153/3210.78.151.153 – 10.78.151.15310.78.151.153
2710.78.151.154/3210.78.151.154 – 10.78.151.15410.78.151.154
2810.78.151.155/3210.78.151.155 – 10.78.151.15510.78.151.155
2910.78.151.156/3210.78.151.156 – 10.78.151.15610.78.151.156
3010.78.151.157/3210.78.151.157 – 10.78.151.15710.78.151.157
3110.78.151.158/3210.78.151.158 – 10.78.151.15810.78.151.158
3210.78.151.159/3210.78.151.159 – 10.78.151.15910.78.151.159
3310.78.151.160/3210.78.151.160 – 10.78.151.16010.78.151.160
3410.78.151.161/3210.78.151.161 – 10.78.151.16110.78.151.161
3510.78.151.162/3210.78.151.162 – 10.78.151.16210.78.151.162
3610.78.151.163/3210.78.151.163 – 10.78.151.16310.78.151.163
3710.78.151.164/3210.78.151.164 – 10.78.151.16410.78.151.164
3810.78.151.165/3210.78.151.165 – 10.78.151.16510.78.151.165
3910.78.151.166/3210.78.151.166 – 10.78.151.16610.78.151.166
4010.78.151.167/3210.78.151.167 – 10.78.151.16710.78.151.167
4110.78.151.168/3210.78.151.168 – 10.78.151.16810.78.151.168
4210.78.151.169/3210.78.151.169 – 10.78.151.16910.78.151.169
4310.78.151.170/3210.78.151.170 – 10.78.151.17010.78.151.170
4410.78.151.171/3210.78.151.171 – 10.78.151.17110.78.151.171
4510.78.151.172/3210.78.151.172 – 10.78.151.17210.78.151.172
4610.78.151.173/3210.78.151.173 – 10.78.151.17310.78.151.173
4710.78.151.174/3210.78.151.174 – 10.78.151.17410.78.151.174
4810.78.151.175/3210.78.151.175 – 10.78.151.17510.78.151.175
4910.78.151.176/3210.78.151.176 – 10.78.151.17610.78.151.176
5010.78.151.177/3210.78.151.177 – 10.78.151.17710.78.151.177
5110.78.151.178/3210.78.151.178 – 10.78.151.17810.78.151.178
5210.78.151.179/3210.78.151.179 – 10.78.151.17910.78.151.179
5310.78.151.180/3210.78.151.180 – 10.78.151.18010.78.151.180
5410.78.151.181/3210.78.151.181 – 10.78.151.18110.78.151.181
5510.78.151.182/3210.78.151.182 – 10.78.151.18210.78.151.182
5610.78.151.183/3210.78.151.183 – 10.78.151.18310.78.151.183
5710.78.151.184/3210.78.151.184 – 10.78.151.18410.78.151.184
5810.78.151.185/3210.78.151.185 – 10.78.151.18510.78.151.185
5910.78.151.186/3210.78.151.186 – 10.78.151.18610.78.151.186
6010.78.151.187/3210.78.151.187 – 10.78.151.18710.78.151.187
6110.78.151.188/3210.78.151.188 – 10.78.151.18810.78.151.188
6210.78.151.189/3210.78.151.189 – 10.78.151.18910.78.151.189
6310.78.151.190/3210.78.151.190 – 10.78.151.19010.78.151.190
6410.78.151.191/3210.78.151.191 – 10.78.151.19110.78.151.191
6510.78.151.192/3210.78.151.192 – 10.78.151.19210.78.151.192
6610.78.151.193/3210.78.151.193 – 10.78.151.19310.78.151.193
6710.78.151.194/3210.78.151.194 – 10.78.151.19410.78.151.194
6810.78.151.195/3210.78.151.195 – 10.78.151.19510.78.151.195
6910.78.151.196/3210.78.151.196 – 10.78.151.19610.78.151.196
7010.78.151.197/3210.78.151.197 – 10.78.151.19710.78.151.197
7110.78.151.198/3210.78.151.198 – 10.78.151.19810.78.151.198
7210.78.151.199/3210.78.151.199 – 10.78.151.19910.78.151.199
7310.78.151.200/3210.78.151.200 – 10.78.151.20010.78.151.200
7410.78.151.201/3210.78.151.201 – 10.78.151.20110.78.151.201
7510.78.151.202/3210.78.151.202 – 10.78.151.20210.78.151.202
7610.78.151.203/3210.78.151.203 – 10.78.151.20310.78.151.203
7710.78.151.204/3210.78.151.204 – 10.78.151.20410.78.151.204
7810.78.151.205/3210.78.151.205 – 10.78.151.20510.78.151.205
7910.78.151.206/3210.78.151.206 – 10.78.151.20610.78.151.206
8010.78.151.207/3210.78.151.207 – 10.78.151.20710.78.151.207
8110.78.151.208/3210.78.151.208 – 10.78.151.20810.78.151.208
8210.78.151.209/3210.78.151.209 – 10.78.151.20910.78.151.209
8310.78.151.210/3210.78.151.210 – 10.78.151.21010.78.151.210
8410.78.151.211/3210.78.151.211 – 10.78.151.21110.78.151.211
8510.78.151.212/3210.78.151.212 – 10.78.151.21210.78.151.212
8610.78.151.213/3210.78.151.213 – 10.78.151.21310.78.151.213
8710.78.151.214/3210.78.151.214 – 10.78.151.21410.78.151.214
8810.78.151.215/3210.78.151.215 – 10.78.151.21510.78.151.215
8910.78.151.216/3210.78.151.216 – 10.78.151.21610.78.151.216
9010.78.151.217/3210.78.151.217 – 10.78.151.21710.78.151.217
9110.78.151.218/3210.78.151.218 – 10.78.151.21810.78.151.218
9210.78.151.219/3210.78.151.219 – 10.78.151.21910.78.151.219
9310.78.151.220/3210.78.151.220 – 10.78.151.22010.78.151.220
9410.78.151.221/3210.78.151.221 – 10.78.151.22110.78.151.221
9510.78.151.222/3210.78.151.222 – 10.78.151.22210.78.151.222
9610.78.151.223/3210.78.151.223 – 10.78.151.22310.78.151.223
9710.78.151.224/3210.78.151.224 – 10.78.151.22410.78.151.224
9810.78.151.225/3210.78.151.225 – 10.78.151.22510.78.151.225
9910.78.151.226/3210.78.151.226 – 10.78.151.22610.78.151.226
10010.78.151.227/3210.78.151.227 – 10.78.151.22710.78.151.227
10110.78.151.228/3210.78.151.228 – 10.78.151.22810.78.151.228
10210.78.151.229/3210.78.151.229 – 10.78.151.22910.78.151.229
10310.78.151.230/3210.78.151.230 – 10.78.151.23010.78.151.230
10410.78.151.231/3210.78.151.231 – 10.78.151.23110.78.151.231
10510.78.151.232/3210.78.151.232 – 10.78.151.23210.78.151.232
10610.78.151.233/3210.78.151.233 – 10.78.151.23310.78.151.233
10710.78.151.234/3210.78.151.234 – 10.78.151.23410.78.151.234
10810.78.151.235/3210.78.151.235 – 10.78.151.23510.78.151.235
10910.78.151.236/3210.78.151.236 – 10.78.151.23610.78.151.236
11010.78.151.237/3210.78.151.237 – 10.78.151.23710.78.151.237
11110.78.151.238/3210.78.151.238 – 10.78.151.23810.78.151.238
11210.78.151.239/3210.78.151.239 – 10.78.151.23910.78.151.239
11310.78.151.240/3210.78.151.240 – 10.78.151.24010.78.151.240
11410.78.151.241/3210.78.151.241 – 10.78.151.24110.78.151.241
11510.78.151.242/3210.78.151.242 – 10.78.151.24210.78.151.242
11610.78.151.243/3210.78.151.243 – 10.78.151.24310.78.151.243
11710.78.151.244/3210.78.151.244 – 10.78.151.24410.78.151.244
11810.78.151.245/3210.78.151.245 – 10.78.151.24510.78.151.245
11910.78.151.246/3210.78.151.246 – 10.78.151.24610.78.151.246
12010.78.151.247/3210.78.151.247 – 10.78.151.24710.78.151.247
12110.78.151.248/3210.78.151.248 – 10.78.151.24810.78.151.248
12210.78.151.249/3210.78.151.249 – 10.78.151.24910.78.151.249
12310.78.151.250/3210.78.151.250 – 10.78.151.25010.78.151.250
12410.78.151.251/3210.78.151.251 – 10.78.151.25110.78.151.251
12510.78.151.252/3210.78.151.252 – 10.78.151.25210.78.151.252
12610.78.151.253/3210.78.151.253 – 10.78.151.25310.78.151.253
12710.78.151.254/3210.78.151.254 – 10.78.151.25410.78.151.254
12810.78.151.255/3210.78.151.255 – 10.78.151.25510.78.151.255
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 →