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)10.0.115.128/25
network10.0.115.128/25
broadcast10.0.115.255
first host10.0.115.129
last host10.0.115.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.0.115.128/25
address00001010.00000000.01110011.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000000.01110011.10000000
broadcast00001010.00000000.01110011.11111111
green = network part, grey = host part
hex0x0a007380
decimal167801728
reverse dns128.115.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:7380

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.115.128/3210.0.115.128 – 10.0.115.12810.0.115.128
210.0.115.129/3210.0.115.129 – 10.0.115.12910.0.115.129
310.0.115.130/3210.0.115.130 – 10.0.115.13010.0.115.130
410.0.115.131/3210.0.115.131 – 10.0.115.13110.0.115.131
510.0.115.132/3210.0.115.132 – 10.0.115.13210.0.115.132
610.0.115.133/3210.0.115.133 – 10.0.115.13310.0.115.133
710.0.115.134/3210.0.115.134 – 10.0.115.13410.0.115.134
810.0.115.135/3210.0.115.135 – 10.0.115.13510.0.115.135
910.0.115.136/3210.0.115.136 – 10.0.115.13610.0.115.136
1010.0.115.137/3210.0.115.137 – 10.0.115.13710.0.115.137
1110.0.115.138/3210.0.115.138 – 10.0.115.13810.0.115.138
1210.0.115.139/3210.0.115.139 – 10.0.115.13910.0.115.139
1310.0.115.140/3210.0.115.140 – 10.0.115.14010.0.115.140
1410.0.115.141/3210.0.115.141 – 10.0.115.14110.0.115.141
1510.0.115.142/3210.0.115.142 – 10.0.115.14210.0.115.142
1610.0.115.143/3210.0.115.143 – 10.0.115.14310.0.115.143
1710.0.115.144/3210.0.115.144 – 10.0.115.14410.0.115.144
1810.0.115.145/3210.0.115.145 – 10.0.115.14510.0.115.145
1910.0.115.146/3210.0.115.146 – 10.0.115.14610.0.115.146
2010.0.115.147/3210.0.115.147 – 10.0.115.14710.0.115.147
2110.0.115.148/3210.0.115.148 – 10.0.115.14810.0.115.148
2210.0.115.149/3210.0.115.149 – 10.0.115.14910.0.115.149
2310.0.115.150/3210.0.115.150 – 10.0.115.15010.0.115.150
2410.0.115.151/3210.0.115.151 – 10.0.115.15110.0.115.151
2510.0.115.152/3210.0.115.152 – 10.0.115.15210.0.115.152
2610.0.115.153/3210.0.115.153 – 10.0.115.15310.0.115.153
2710.0.115.154/3210.0.115.154 – 10.0.115.15410.0.115.154
2810.0.115.155/3210.0.115.155 – 10.0.115.15510.0.115.155
2910.0.115.156/3210.0.115.156 – 10.0.115.15610.0.115.156
3010.0.115.157/3210.0.115.157 – 10.0.115.15710.0.115.157
3110.0.115.158/3210.0.115.158 – 10.0.115.15810.0.115.158
3210.0.115.159/3210.0.115.159 – 10.0.115.15910.0.115.159
3310.0.115.160/3210.0.115.160 – 10.0.115.16010.0.115.160
3410.0.115.161/3210.0.115.161 – 10.0.115.16110.0.115.161
3510.0.115.162/3210.0.115.162 – 10.0.115.16210.0.115.162
3610.0.115.163/3210.0.115.163 – 10.0.115.16310.0.115.163
3710.0.115.164/3210.0.115.164 – 10.0.115.16410.0.115.164
3810.0.115.165/3210.0.115.165 – 10.0.115.16510.0.115.165
3910.0.115.166/3210.0.115.166 – 10.0.115.16610.0.115.166
4010.0.115.167/3210.0.115.167 – 10.0.115.16710.0.115.167
4110.0.115.168/3210.0.115.168 – 10.0.115.16810.0.115.168
4210.0.115.169/3210.0.115.169 – 10.0.115.16910.0.115.169
4310.0.115.170/3210.0.115.170 – 10.0.115.17010.0.115.170
4410.0.115.171/3210.0.115.171 – 10.0.115.17110.0.115.171
4510.0.115.172/3210.0.115.172 – 10.0.115.17210.0.115.172
4610.0.115.173/3210.0.115.173 – 10.0.115.17310.0.115.173
4710.0.115.174/3210.0.115.174 – 10.0.115.17410.0.115.174
4810.0.115.175/3210.0.115.175 – 10.0.115.17510.0.115.175
4910.0.115.176/3210.0.115.176 – 10.0.115.17610.0.115.176
5010.0.115.177/3210.0.115.177 – 10.0.115.17710.0.115.177
5110.0.115.178/3210.0.115.178 – 10.0.115.17810.0.115.178
5210.0.115.179/3210.0.115.179 – 10.0.115.17910.0.115.179
5310.0.115.180/3210.0.115.180 – 10.0.115.18010.0.115.180
5410.0.115.181/3210.0.115.181 – 10.0.115.18110.0.115.181
5510.0.115.182/3210.0.115.182 – 10.0.115.18210.0.115.182
5610.0.115.183/3210.0.115.183 – 10.0.115.18310.0.115.183
5710.0.115.184/3210.0.115.184 – 10.0.115.18410.0.115.184
5810.0.115.185/3210.0.115.185 – 10.0.115.18510.0.115.185
5910.0.115.186/3210.0.115.186 – 10.0.115.18610.0.115.186
6010.0.115.187/3210.0.115.187 – 10.0.115.18710.0.115.187
6110.0.115.188/3210.0.115.188 – 10.0.115.18810.0.115.188
6210.0.115.189/3210.0.115.189 – 10.0.115.18910.0.115.189
6310.0.115.190/3210.0.115.190 – 10.0.115.19010.0.115.190
6410.0.115.191/3210.0.115.191 – 10.0.115.19110.0.115.191
6510.0.115.192/3210.0.115.192 – 10.0.115.19210.0.115.192
6610.0.115.193/3210.0.115.193 – 10.0.115.19310.0.115.193
6710.0.115.194/3210.0.115.194 – 10.0.115.19410.0.115.194
6810.0.115.195/3210.0.115.195 – 10.0.115.19510.0.115.195
6910.0.115.196/3210.0.115.196 – 10.0.115.19610.0.115.196
7010.0.115.197/3210.0.115.197 – 10.0.115.19710.0.115.197
7110.0.115.198/3210.0.115.198 – 10.0.115.19810.0.115.198
7210.0.115.199/3210.0.115.199 – 10.0.115.19910.0.115.199
7310.0.115.200/3210.0.115.200 – 10.0.115.20010.0.115.200
7410.0.115.201/3210.0.115.201 – 10.0.115.20110.0.115.201
7510.0.115.202/3210.0.115.202 – 10.0.115.20210.0.115.202
7610.0.115.203/3210.0.115.203 – 10.0.115.20310.0.115.203
7710.0.115.204/3210.0.115.204 – 10.0.115.20410.0.115.204
7810.0.115.205/3210.0.115.205 – 10.0.115.20510.0.115.205
7910.0.115.206/3210.0.115.206 – 10.0.115.20610.0.115.206
8010.0.115.207/3210.0.115.207 – 10.0.115.20710.0.115.207
8110.0.115.208/3210.0.115.208 – 10.0.115.20810.0.115.208
8210.0.115.209/3210.0.115.209 – 10.0.115.20910.0.115.209
8310.0.115.210/3210.0.115.210 – 10.0.115.21010.0.115.210
8410.0.115.211/3210.0.115.211 – 10.0.115.21110.0.115.211
8510.0.115.212/3210.0.115.212 – 10.0.115.21210.0.115.212
8610.0.115.213/3210.0.115.213 – 10.0.115.21310.0.115.213
8710.0.115.214/3210.0.115.214 – 10.0.115.21410.0.115.214
8810.0.115.215/3210.0.115.215 – 10.0.115.21510.0.115.215
8910.0.115.216/3210.0.115.216 – 10.0.115.21610.0.115.216
9010.0.115.217/3210.0.115.217 – 10.0.115.21710.0.115.217
9110.0.115.218/3210.0.115.218 – 10.0.115.21810.0.115.218
9210.0.115.219/3210.0.115.219 – 10.0.115.21910.0.115.219
9310.0.115.220/3210.0.115.220 – 10.0.115.22010.0.115.220
9410.0.115.221/3210.0.115.221 – 10.0.115.22110.0.115.221
9510.0.115.222/3210.0.115.222 – 10.0.115.22210.0.115.222
9610.0.115.223/3210.0.115.223 – 10.0.115.22310.0.115.223
9710.0.115.224/3210.0.115.224 – 10.0.115.22410.0.115.224
9810.0.115.225/3210.0.115.225 – 10.0.115.22510.0.115.225
9910.0.115.226/3210.0.115.226 – 10.0.115.22610.0.115.226
10010.0.115.227/3210.0.115.227 – 10.0.115.22710.0.115.227
10110.0.115.228/3210.0.115.228 – 10.0.115.22810.0.115.228
10210.0.115.229/3210.0.115.229 – 10.0.115.22910.0.115.229
10310.0.115.230/3210.0.115.230 – 10.0.115.23010.0.115.230
10410.0.115.231/3210.0.115.231 – 10.0.115.23110.0.115.231
10510.0.115.232/3210.0.115.232 – 10.0.115.23210.0.115.232
10610.0.115.233/3210.0.115.233 – 10.0.115.23310.0.115.233
10710.0.115.234/3210.0.115.234 – 10.0.115.23410.0.115.234
10810.0.115.235/3210.0.115.235 – 10.0.115.23510.0.115.235
10910.0.115.236/3210.0.115.236 – 10.0.115.23610.0.115.236
11010.0.115.237/3210.0.115.237 – 10.0.115.23710.0.115.237
11110.0.115.238/3210.0.115.238 – 10.0.115.23810.0.115.238
11210.0.115.239/3210.0.115.239 – 10.0.115.23910.0.115.239
11310.0.115.240/3210.0.115.240 – 10.0.115.24010.0.115.240
11410.0.115.241/3210.0.115.241 – 10.0.115.24110.0.115.241
11510.0.115.242/3210.0.115.242 – 10.0.115.24210.0.115.242
11610.0.115.243/3210.0.115.243 – 10.0.115.24310.0.115.243
11710.0.115.244/3210.0.115.244 – 10.0.115.24410.0.115.244
11810.0.115.245/3210.0.115.245 – 10.0.115.24510.0.115.245
11910.0.115.246/3210.0.115.246 – 10.0.115.24610.0.115.246
12010.0.115.247/3210.0.115.247 – 10.0.115.24710.0.115.247
12110.0.115.248/3210.0.115.248 – 10.0.115.24810.0.115.248
12210.0.115.249/3210.0.115.249 – 10.0.115.24910.0.115.249
12310.0.115.250/3210.0.115.250 – 10.0.115.25010.0.115.250
12410.0.115.251/3210.0.115.251 – 10.0.115.25110.0.115.251
12510.0.115.252/3210.0.115.252 – 10.0.115.25210.0.115.252
12610.0.115.253/3210.0.115.253 – 10.0.115.25310.0.115.253
12710.0.115.254/3210.0.115.254 – 10.0.115.25410.0.115.254
12810.0.115.255/3210.0.115.255 – 10.0.115.25510.0.115.255
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 →