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)10.78.0.128/25
network10.78.0.128/25
broadcast10.78.0.255
first host10.78.0.129
last host10.78.0.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.0.128/25
address00001010.01001110.00000000.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.00000000.10000000
broadcast00001010.01001110.00000000.11111111
green = network part, grey = host part
hex0x0a4e0080
decimal172884096
reverse dns128.0.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.0.128/3210.78.0.128 – 10.78.0.12810.78.0.128
210.78.0.129/3210.78.0.129 – 10.78.0.12910.78.0.129
310.78.0.130/3210.78.0.130 – 10.78.0.13010.78.0.130
410.78.0.131/3210.78.0.131 – 10.78.0.13110.78.0.131
510.78.0.132/3210.78.0.132 – 10.78.0.13210.78.0.132
610.78.0.133/3210.78.0.133 – 10.78.0.13310.78.0.133
710.78.0.134/3210.78.0.134 – 10.78.0.13410.78.0.134
810.78.0.135/3210.78.0.135 – 10.78.0.13510.78.0.135
910.78.0.136/3210.78.0.136 – 10.78.0.13610.78.0.136
1010.78.0.137/3210.78.0.137 – 10.78.0.13710.78.0.137
1110.78.0.138/3210.78.0.138 – 10.78.0.13810.78.0.138
1210.78.0.139/3210.78.0.139 – 10.78.0.13910.78.0.139
1310.78.0.140/3210.78.0.140 – 10.78.0.14010.78.0.140
1410.78.0.141/3210.78.0.141 – 10.78.0.14110.78.0.141
1510.78.0.142/3210.78.0.142 – 10.78.0.14210.78.0.142
1610.78.0.143/3210.78.0.143 – 10.78.0.14310.78.0.143
1710.78.0.144/3210.78.0.144 – 10.78.0.14410.78.0.144
1810.78.0.145/3210.78.0.145 – 10.78.0.14510.78.0.145
1910.78.0.146/3210.78.0.146 – 10.78.0.14610.78.0.146
2010.78.0.147/3210.78.0.147 – 10.78.0.14710.78.0.147
2110.78.0.148/3210.78.0.148 – 10.78.0.14810.78.0.148
2210.78.0.149/3210.78.0.149 – 10.78.0.14910.78.0.149
2310.78.0.150/3210.78.0.150 – 10.78.0.15010.78.0.150
2410.78.0.151/3210.78.0.151 – 10.78.0.15110.78.0.151
2510.78.0.152/3210.78.0.152 – 10.78.0.15210.78.0.152
2610.78.0.153/3210.78.0.153 – 10.78.0.15310.78.0.153
2710.78.0.154/3210.78.0.154 – 10.78.0.15410.78.0.154
2810.78.0.155/3210.78.0.155 – 10.78.0.15510.78.0.155
2910.78.0.156/3210.78.0.156 – 10.78.0.15610.78.0.156
3010.78.0.157/3210.78.0.157 – 10.78.0.15710.78.0.157
3110.78.0.158/3210.78.0.158 – 10.78.0.15810.78.0.158
3210.78.0.159/3210.78.0.159 – 10.78.0.15910.78.0.159
3310.78.0.160/3210.78.0.160 – 10.78.0.16010.78.0.160
3410.78.0.161/3210.78.0.161 – 10.78.0.16110.78.0.161
3510.78.0.162/3210.78.0.162 – 10.78.0.16210.78.0.162
3610.78.0.163/3210.78.0.163 – 10.78.0.16310.78.0.163
3710.78.0.164/3210.78.0.164 – 10.78.0.16410.78.0.164
3810.78.0.165/3210.78.0.165 – 10.78.0.16510.78.0.165
3910.78.0.166/3210.78.0.166 – 10.78.0.16610.78.0.166
4010.78.0.167/3210.78.0.167 – 10.78.0.16710.78.0.167
4110.78.0.168/3210.78.0.168 – 10.78.0.16810.78.0.168
4210.78.0.169/3210.78.0.169 – 10.78.0.16910.78.0.169
4310.78.0.170/3210.78.0.170 – 10.78.0.17010.78.0.170
4410.78.0.171/3210.78.0.171 – 10.78.0.17110.78.0.171
4510.78.0.172/3210.78.0.172 – 10.78.0.17210.78.0.172
4610.78.0.173/3210.78.0.173 – 10.78.0.17310.78.0.173
4710.78.0.174/3210.78.0.174 – 10.78.0.17410.78.0.174
4810.78.0.175/3210.78.0.175 – 10.78.0.17510.78.0.175
4910.78.0.176/3210.78.0.176 – 10.78.0.17610.78.0.176
5010.78.0.177/3210.78.0.177 – 10.78.0.17710.78.0.177
5110.78.0.178/3210.78.0.178 – 10.78.0.17810.78.0.178
5210.78.0.179/3210.78.0.179 – 10.78.0.17910.78.0.179
5310.78.0.180/3210.78.0.180 – 10.78.0.18010.78.0.180
5410.78.0.181/3210.78.0.181 – 10.78.0.18110.78.0.181
5510.78.0.182/3210.78.0.182 – 10.78.0.18210.78.0.182
5610.78.0.183/3210.78.0.183 – 10.78.0.18310.78.0.183
5710.78.0.184/3210.78.0.184 – 10.78.0.18410.78.0.184
5810.78.0.185/3210.78.0.185 – 10.78.0.18510.78.0.185
5910.78.0.186/3210.78.0.186 – 10.78.0.18610.78.0.186
6010.78.0.187/3210.78.0.187 – 10.78.0.18710.78.0.187
6110.78.0.188/3210.78.0.188 – 10.78.0.18810.78.0.188
6210.78.0.189/3210.78.0.189 – 10.78.0.18910.78.0.189
6310.78.0.190/3210.78.0.190 – 10.78.0.19010.78.0.190
6410.78.0.191/3210.78.0.191 – 10.78.0.19110.78.0.191
6510.78.0.192/3210.78.0.192 – 10.78.0.19210.78.0.192
6610.78.0.193/3210.78.0.193 – 10.78.0.19310.78.0.193
6710.78.0.194/3210.78.0.194 – 10.78.0.19410.78.0.194
6810.78.0.195/3210.78.0.195 – 10.78.0.19510.78.0.195
6910.78.0.196/3210.78.0.196 – 10.78.0.19610.78.0.196
7010.78.0.197/3210.78.0.197 – 10.78.0.19710.78.0.197
7110.78.0.198/3210.78.0.198 – 10.78.0.19810.78.0.198
7210.78.0.199/3210.78.0.199 – 10.78.0.19910.78.0.199
7310.78.0.200/3210.78.0.200 – 10.78.0.20010.78.0.200
7410.78.0.201/3210.78.0.201 – 10.78.0.20110.78.0.201
7510.78.0.202/3210.78.0.202 – 10.78.0.20210.78.0.202
7610.78.0.203/3210.78.0.203 – 10.78.0.20310.78.0.203
7710.78.0.204/3210.78.0.204 – 10.78.0.20410.78.0.204
7810.78.0.205/3210.78.0.205 – 10.78.0.20510.78.0.205
7910.78.0.206/3210.78.0.206 – 10.78.0.20610.78.0.206
8010.78.0.207/3210.78.0.207 – 10.78.0.20710.78.0.207
8110.78.0.208/3210.78.0.208 – 10.78.0.20810.78.0.208
8210.78.0.209/3210.78.0.209 – 10.78.0.20910.78.0.209
8310.78.0.210/3210.78.0.210 – 10.78.0.21010.78.0.210
8410.78.0.211/3210.78.0.211 – 10.78.0.21110.78.0.211
8510.78.0.212/3210.78.0.212 – 10.78.0.21210.78.0.212
8610.78.0.213/3210.78.0.213 – 10.78.0.21310.78.0.213
8710.78.0.214/3210.78.0.214 – 10.78.0.21410.78.0.214
8810.78.0.215/3210.78.0.215 – 10.78.0.21510.78.0.215
8910.78.0.216/3210.78.0.216 – 10.78.0.21610.78.0.216
9010.78.0.217/3210.78.0.217 – 10.78.0.21710.78.0.217
9110.78.0.218/3210.78.0.218 – 10.78.0.21810.78.0.218
9210.78.0.219/3210.78.0.219 – 10.78.0.21910.78.0.219
9310.78.0.220/3210.78.0.220 – 10.78.0.22010.78.0.220
9410.78.0.221/3210.78.0.221 – 10.78.0.22110.78.0.221
9510.78.0.222/3210.78.0.222 – 10.78.0.22210.78.0.222
9610.78.0.223/3210.78.0.223 – 10.78.0.22310.78.0.223
9710.78.0.224/3210.78.0.224 – 10.78.0.22410.78.0.224
9810.78.0.225/3210.78.0.225 – 10.78.0.22510.78.0.225
9910.78.0.226/3210.78.0.226 – 10.78.0.22610.78.0.226
10010.78.0.227/3210.78.0.227 – 10.78.0.22710.78.0.227
10110.78.0.228/3210.78.0.228 – 10.78.0.22810.78.0.228
10210.78.0.229/3210.78.0.229 – 10.78.0.22910.78.0.229
10310.78.0.230/3210.78.0.230 – 10.78.0.23010.78.0.230
10410.78.0.231/3210.78.0.231 – 10.78.0.23110.78.0.231
10510.78.0.232/3210.78.0.232 – 10.78.0.23210.78.0.232
10610.78.0.233/3210.78.0.233 – 10.78.0.23310.78.0.233
10710.78.0.234/3210.78.0.234 – 10.78.0.23410.78.0.234
10810.78.0.235/3210.78.0.235 – 10.78.0.23510.78.0.235
10910.78.0.236/3210.78.0.236 – 10.78.0.23610.78.0.236
11010.78.0.237/3210.78.0.237 – 10.78.0.23710.78.0.237
11110.78.0.238/3210.78.0.238 – 10.78.0.23810.78.0.238
11210.78.0.239/3210.78.0.239 – 10.78.0.23910.78.0.239
11310.78.0.240/3210.78.0.240 – 10.78.0.24010.78.0.240
11410.78.0.241/3210.78.0.241 – 10.78.0.24110.78.0.241
11510.78.0.242/3210.78.0.242 – 10.78.0.24210.78.0.242
11610.78.0.243/3210.78.0.243 – 10.78.0.24310.78.0.243
11710.78.0.244/3210.78.0.244 – 10.78.0.24410.78.0.244
11810.78.0.245/3210.78.0.245 – 10.78.0.24510.78.0.245
11910.78.0.246/3210.78.0.246 – 10.78.0.24610.78.0.246
12010.78.0.247/3210.78.0.247 – 10.78.0.24710.78.0.247
12110.78.0.248/3210.78.0.248 – 10.78.0.24810.78.0.248
12210.78.0.249/3210.78.0.249 – 10.78.0.24910.78.0.249
12310.78.0.250/3210.78.0.250 – 10.78.0.25010.78.0.250
12410.78.0.251/3210.78.0.251 – 10.78.0.25110.78.0.251
12510.78.0.252/3210.78.0.252 – 10.78.0.25210.78.0.252
12610.78.0.253/3210.78.0.253 – 10.78.0.25310.78.0.253
12710.78.0.254/3210.78.0.254 – 10.78.0.25410.78.0.254
12810.78.0.255/3210.78.0.255 – 10.78.0.25510.78.0.255
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 →