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)10.78.90.128/25
network10.78.90.128/25
broadcast10.78.90.255
first host10.78.90.129
last host10.78.90.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.78.90.128/25
address00001010.01001110.01011010.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001110.01011010.10000000
broadcast00001010.01001110.01011010.11111111
green = network part, grey = host part
hex0x0a4e5a80
decimal172907136
reverse dns128.90.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5a80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.90.128/3210.78.90.128 – 10.78.90.12810.78.90.128
210.78.90.129/3210.78.90.129 – 10.78.90.12910.78.90.129
310.78.90.130/3210.78.90.130 – 10.78.90.13010.78.90.130
410.78.90.131/3210.78.90.131 – 10.78.90.13110.78.90.131
510.78.90.132/3210.78.90.132 – 10.78.90.13210.78.90.132
610.78.90.133/3210.78.90.133 – 10.78.90.13310.78.90.133
710.78.90.134/3210.78.90.134 – 10.78.90.13410.78.90.134
810.78.90.135/3210.78.90.135 – 10.78.90.13510.78.90.135
910.78.90.136/3210.78.90.136 – 10.78.90.13610.78.90.136
1010.78.90.137/3210.78.90.137 – 10.78.90.13710.78.90.137
1110.78.90.138/3210.78.90.138 – 10.78.90.13810.78.90.138
1210.78.90.139/3210.78.90.139 – 10.78.90.13910.78.90.139
1310.78.90.140/3210.78.90.140 – 10.78.90.14010.78.90.140
1410.78.90.141/3210.78.90.141 – 10.78.90.14110.78.90.141
1510.78.90.142/3210.78.90.142 – 10.78.90.14210.78.90.142
1610.78.90.143/3210.78.90.143 – 10.78.90.14310.78.90.143
1710.78.90.144/3210.78.90.144 – 10.78.90.14410.78.90.144
1810.78.90.145/3210.78.90.145 – 10.78.90.14510.78.90.145
1910.78.90.146/3210.78.90.146 – 10.78.90.14610.78.90.146
2010.78.90.147/3210.78.90.147 – 10.78.90.14710.78.90.147
2110.78.90.148/3210.78.90.148 – 10.78.90.14810.78.90.148
2210.78.90.149/3210.78.90.149 – 10.78.90.14910.78.90.149
2310.78.90.150/3210.78.90.150 – 10.78.90.15010.78.90.150
2410.78.90.151/3210.78.90.151 – 10.78.90.15110.78.90.151
2510.78.90.152/3210.78.90.152 – 10.78.90.15210.78.90.152
2610.78.90.153/3210.78.90.153 – 10.78.90.15310.78.90.153
2710.78.90.154/3210.78.90.154 – 10.78.90.15410.78.90.154
2810.78.90.155/3210.78.90.155 – 10.78.90.15510.78.90.155
2910.78.90.156/3210.78.90.156 – 10.78.90.15610.78.90.156
3010.78.90.157/3210.78.90.157 – 10.78.90.15710.78.90.157
3110.78.90.158/3210.78.90.158 – 10.78.90.15810.78.90.158
3210.78.90.159/3210.78.90.159 – 10.78.90.15910.78.90.159
3310.78.90.160/3210.78.90.160 – 10.78.90.16010.78.90.160
3410.78.90.161/3210.78.90.161 – 10.78.90.16110.78.90.161
3510.78.90.162/3210.78.90.162 – 10.78.90.16210.78.90.162
3610.78.90.163/3210.78.90.163 – 10.78.90.16310.78.90.163
3710.78.90.164/3210.78.90.164 – 10.78.90.16410.78.90.164
3810.78.90.165/3210.78.90.165 – 10.78.90.16510.78.90.165
3910.78.90.166/3210.78.90.166 – 10.78.90.16610.78.90.166
4010.78.90.167/3210.78.90.167 – 10.78.90.16710.78.90.167
4110.78.90.168/3210.78.90.168 – 10.78.90.16810.78.90.168
4210.78.90.169/3210.78.90.169 – 10.78.90.16910.78.90.169
4310.78.90.170/3210.78.90.170 – 10.78.90.17010.78.90.170
4410.78.90.171/3210.78.90.171 – 10.78.90.17110.78.90.171
4510.78.90.172/3210.78.90.172 – 10.78.90.17210.78.90.172
4610.78.90.173/3210.78.90.173 – 10.78.90.17310.78.90.173
4710.78.90.174/3210.78.90.174 – 10.78.90.17410.78.90.174
4810.78.90.175/3210.78.90.175 – 10.78.90.17510.78.90.175
4910.78.90.176/3210.78.90.176 – 10.78.90.17610.78.90.176
5010.78.90.177/3210.78.90.177 – 10.78.90.17710.78.90.177
5110.78.90.178/3210.78.90.178 – 10.78.90.17810.78.90.178
5210.78.90.179/3210.78.90.179 – 10.78.90.17910.78.90.179
5310.78.90.180/3210.78.90.180 – 10.78.90.18010.78.90.180
5410.78.90.181/3210.78.90.181 – 10.78.90.18110.78.90.181
5510.78.90.182/3210.78.90.182 – 10.78.90.18210.78.90.182
5610.78.90.183/3210.78.90.183 – 10.78.90.18310.78.90.183
5710.78.90.184/3210.78.90.184 – 10.78.90.18410.78.90.184
5810.78.90.185/3210.78.90.185 – 10.78.90.18510.78.90.185
5910.78.90.186/3210.78.90.186 – 10.78.90.18610.78.90.186
6010.78.90.187/3210.78.90.187 – 10.78.90.18710.78.90.187
6110.78.90.188/3210.78.90.188 – 10.78.90.18810.78.90.188
6210.78.90.189/3210.78.90.189 – 10.78.90.18910.78.90.189
6310.78.90.190/3210.78.90.190 – 10.78.90.19010.78.90.190
6410.78.90.191/3210.78.90.191 – 10.78.90.19110.78.90.191
6510.78.90.192/3210.78.90.192 – 10.78.90.19210.78.90.192
6610.78.90.193/3210.78.90.193 – 10.78.90.19310.78.90.193
6710.78.90.194/3210.78.90.194 – 10.78.90.19410.78.90.194
6810.78.90.195/3210.78.90.195 – 10.78.90.19510.78.90.195
6910.78.90.196/3210.78.90.196 – 10.78.90.19610.78.90.196
7010.78.90.197/3210.78.90.197 – 10.78.90.19710.78.90.197
7110.78.90.198/3210.78.90.198 – 10.78.90.19810.78.90.198
7210.78.90.199/3210.78.90.199 – 10.78.90.19910.78.90.199
7310.78.90.200/3210.78.90.200 – 10.78.90.20010.78.90.200
7410.78.90.201/3210.78.90.201 – 10.78.90.20110.78.90.201
7510.78.90.202/3210.78.90.202 – 10.78.90.20210.78.90.202
7610.78.90.203/3210.78.90.203 – 10.78.90.20310.78.90.203
7710.78.90.204/3210.78.90.204 – 10.78.90.20410.78.90.204
7810.78.90.205/3210.78.90.205 – 10.78.90.20510.78.90.205
7910.78.90.206/3210.78.90.206 – 10.78.90.20610.78.90.206
8010.78.90.207/3210.78.90.207 – 10.78.90.20710.78.90.207
8110.78.90.208/3210.78.90.208 – 10.78.90.20810.78.90.208
8210.78.90.209/3210.78.90.209 – 10.78.90.20910.78.90.209
8310.78.90.210/3210.78.90.210 – 10.78.90.21010.78.90.210
8410.78.90.211/3210.78.90.211 – 10.78.90.21110.78.90.211
8510.78.90.212/3210.78.90.212 – 10.78.90.21210.78.90.212
8610.78.90.213/3210.78.90.213 – 10.78.90.21310.78.90.213
8710.78.90.214/3210.78.90.214 – 10.78.90.21410.78.90.214
8810.78.90.215/3210.78.90.215 – 10.78.90.21510.78.90.215
8910.78.90.216/3210.78.90.216 – 10.78.90.21610.78.90.216
9010.78.90.217/3210.78.90.217 – 10.78.90.21710.78.90.217
9110.78.90.218/3210.78.90.218 – 10.78.90.21810.78.90.218
9210.78.90.219/3210.78.90.219 – 10.78.90.21910.78.90.219
9310.78.90.220/3210.78.90.220 – 10.78.90.22010.78.90.220
9410.78.90.221/3210.78.90.221 – 10.78.90.22110.78.90.221
9510.78.90.222/3210.78.90.222 – 10.78.90.22210.78.90.222
9610.78.90.223/3210.78.90.223 – 10.78.90.22310.78.90.223
9710.78.90.224/3210.78.90.224 – 10.78.90.22410.78.90.224
9810.78.90.225/3210.78.90.225 – 10.78.90.22510.78.90.225
9910.78.90.226/3210.78.90.226 – 10.78.90.22610.78.90.226
10010.78.90.227/3210.78.90.227 – 10.78.90.22710.78.90.227
10110.78.90.228/3210.78.90.228 – 10.78.90.22810.78.90.228
10210.78.90.229/3210.78.90.229 – 10.78.90.22910.78.90.229
10310.78.90.230/3210.78.90.230 – 10.78.90.23010.78.90.230
10410.78.90.231/3210.78.90.231 – 10.78.90.23110.78.90.231
10510.78.90.232/3210.78.90.232 – 10.78.90.23210.78.90.232
10610.78.90.233/3210.78.90.233 – 10.78.90.23310.78.90.233
10710.78.90.234/3210.78.90.234 – 10.78.90.23410.78.90.234
10810.78.90.235/3210.78.90.235 – 10.78.90.23510.78.90.235
10910.78.90.236/3210.78.90.236 – 10.78.90.23610.78.90.236
11010.78.90.237/3210.78.90.237 – 10.78.90.23710.78.90.237
11110.78.90.238/3210.78.90.238 – 10.78.90.23810.78.90.238
11210.78.90.239/3210.78.90.239 – 10.78.90.23910.78.90.239
11310.78.90.240/3210.78.90.240 – 10.78.90.24010.78.90.240
11410.78.90.241/3210.78.90.241 – 10.78.90.24110.78.90.241
11510.78.90.242/3210.78.90.242 – 10.78.90.24210.78.90.242
11610.78.90.243/3210.78.90.243 – 10.78.90.24310.78.90.243
11710.78.90.244/3210.78.90.244 – 10.78.90.24410.78.90.244
11810.78.90.245/3210.78.90.245 – 10.78.90.24510.78.90.245
11910.78.90.246/3210.78.90.246 – 10.78.90.24610.78.90.246
12010.78.90.247/3210.78.90.247 – 10.78.90.24710.78.90.247
12110.78.90.248/3210.78.90.248 – 10.78.90.24810.78.90.248
12210.78.90.249/3210.78.90.249 – 10.78.90.24910.78.90.249
12310.78.90.250/3210.78.90.250 – 10.78.90.25010.78.90.250
12410.78.90.251/3210.78.90.251 – 10.78.90.25110.78.90.251
12510.78.90.252/3210.78.90.252 – 10.78.90.25210.78.90.252
12610.78.90.253/3210.78.90.253 – 10.78.90.25310.78.90.253
12710.78.90.254/3210.78.90.254 – 10.78.90.25410.78.90.254
12810.78.90.255/3210.78.90.255 – 10.78.90.25510.78.90.255
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 →