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)10.2.82.128/25
network10.2.82.128/25
broadcast10.2.82.255
first host10.2.82.129
last host10.2.82.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.2.82.128/25
address00001010.00000010.01010010.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000010.01010010.10000000
broadcast00001010.00000010.01010010.11111111
green = network part, grey = host part
hex0x0a025280
decimal167924352
reverse dns128.82.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:5280

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.82.128/3210.2.82.128 – 10.2.82.12810.2.82.128
210.2.82.129/3210.2.82.129 – 10.2.82.12910.2.82.129
310.2.82.130/3210.2.82.130 – 10.2.82.13010.2.82.130
410.2.82.131/3210.2.82.131 – 10.2.82.13110.2.82.131
510.2.82.132/3210.2.82.132 – 10.2.82.13210.2.82.132
610.2.82.133/3210.2.82.133 – 10.2.82.13310.2.82.133
710.2.82.134/3210.2.82.134 – 10.2.82.13410.2.82.134
810.2.82.135/3210.2.82.135 – 10.2.82.13510.2.82.135
910.2.82.136/3210.2.82.136 – 10.2.82.13610.2.82.136
1010.2.82.137/3210.2.82.137 – 10.2.82.13710.2.82.137
1110.2.82.138/3210.2.82.138 – 10.2.82.13810.2.82.138
1210.2.82.139/3210.2.82.139 – 10.2.82.13910.2.82.139
1310.2.82.140/3210.2.82.140 – 10.2.82.14010.2.82.140
1410.2.82.141/3210.2.82.141 – 10.2.82.14110.2.82.141
1510.2.82.142/3210.2.82.142 – 10.2.82.14210.2.82.142
1610.2.82.143/3210.2.82.143 – 10.2.82.14310.2.82.143
1710.2.82.144/3210.2.82.144 – 10.2.82.14410.2.82.144
1810.2.82.145/3210.2.82.145 – 10.2.82.14510.2.82.145
1910.2.82.146/3210.2.82.146 – 10.2.82.14610.2.82.146
2010.2.82.147/3210.2.82.147 – 10.2.82.14710.2.82.147
2110.2.82.148/3210.2.82.148 – 10.2.82.14810.2.82.148
2210.2.82.149/3210.2.82.149 – 10.2.82.14910.2.82.149
2310.2.82.150/3210.2.82.150 – 10.2.82.15010.2.82.150
2410.2.82.151/3210.2.82.151 – 10.2.82.15110.2.82.151
2510.2.82.152/3210.2.82.152 – 10.2.82.15210.2.82.152
2610.2.82.153/3210.2.82.153 – 10.2.82.15310.2.82.153
2710.2.82.154/3210.2.82.154 – 10.2.82.15410.2.82.154
2810.2.82.155/3210.2.82.155 – 10.2.82.15510.2.82.155
2910.2.82.156/3210.2.82.156 – 10.2.82.15610.2.82.156
3010.2.82.157/3210.2.82.157 – 10.2.82.15710.2.82.157
3110.2.82.158/3210.2.82.158 – 10.2.82.15810.2.82.158
3210.2.82.159/3210.2.82.159 – 10.2.82.15910.2.82.159
3310.2.82.160/3210.2.82.160 – 10.2.82.16010.2.82.160
3410.2.82.161/3210.2.82.161 – 10.2.82.16110.2.82.161
3510.2.82.162/3210.2.82.162 – 10.2.82.16210.2.82.162
3610.2.82.163/3210.2.82.163 – 10.2.82.16310.2.82.163
3710.2.82.164/3210.2.82.164 – 10.2.82.16410.2.82.164
3810.2.82.165/3210.2.82.165 – 10.2.82.16510.2.82.165
3910.2.82.166/3210.2.82.166 – 10.2.82.16610.2.82.166
4010.2.82.167/3210.2.82.167 – 10.2.82.16710.2.82.167
4110.2.82.168/3210.2.82.168 – 10.2.82.16810.2.82.168
4210.2.82.169/3210.2.82.169 – 10.2.82.16910.2.82.169
4310.2.82.170/3210.2.82.170 – 10.2.82.17010.2.82.170
4410.2.82.171/3210.2.82.171 – 10.2.82.17110.2.82.171
4510.2.82.172/3210.2.82.172 – 10.2.82.17210.2.82.172
4610.2.82.173/3210.2.82.173 – 10.2.82.17310.2.82.173
4710.2.82.174/3210.2.82.174 – 10.2.82.17410.2.82.174
4810.2.82.175/3210.2.82.175 – 10.2.82.17510.2.82.175
4910.2.82.176/3210.2.82.176 – 10.2.82.17610.2.82.176
5010.2.82.177/3210.2.82.177 – 10.2.82.17710.2.82.177
5110.2.82.178/3210.2.82.178 – 10.2.82.17810.2.82.178
5210.2.82.179/3210.2.82.179 – 10.2.82.17910.2.82.179
5310.2.82.180/3210.2.82.180 – 10.2.82.18010.2.82.180
5410.2.82.181/3210.2.82.181 – 10.2.82.18110.2.82.181
5510.2.82.182/3210.2.82.182 – 10.2.82.18210.2.82.182
5610.2.82.183/3210.2.82.183 – 10.2.82.18310.2.82.183
5710.2.82.184/3210.2.82.184 – 10.2.82.18410.2.82.184
5810.2.82.185/3210.2.82.185 – 10.2.82.18510.2.82.185
5910.2.82.186/3210.2.82.186 – 10.2.82.18610.2.82.186
6010.2.82.187/3210.2.82.187 – 10.2.82.18710.2.82.187
6110.2.82.188/3210.2.82.188 – 10.2.82.18810.2.82.188
6210.2.82.189/3210.2.82.189 – 10.2.82.18910.2.82.189
6310.2.82.190/3210.2.82.190 – 10.2.82.19010.2.82.190
6410.2.82.191/3210.2.82.191 – 10.2.82.19110.2.82.191
6510.2.82.192/3210.2.82.192 – 10.2.82.19210.2.82.192
6610.2.82.193/3210.2.82.193 – 10.2.82.19310.2.82.193
6710.2.82.194/3210.2.82.194 – 10.2.82.19410.2.82.194
6810.2.82.195/3210.2.82.195 – 10.2.82.19510.2.82.195
6910.2.82.196/3210.2.82.196 – 10.2.82.19610.2.82.196
7010.2.82.197/3210.2.82.197 – 10.2.82.19710.2.82.197
7110.2.82.198/3210.2.82.198 – 10.2.82.19810.2.82.198
7210.2.82.199/3210.2.82.199 – 10.2.82.19910.2.82.199
7310.2.82.200/3210.2.82.200 – 10.2.82.20010.2.82.200
7410.2.82.201/3210.2.82.201 – 10.2.82.20110.2.82.201
7510.2.82.202/3210.2.82.202 – 10.2.82.20210.2.82.202
7610.2.82.203/3210.2.82.203 – 10.2.82.20310.2.82.203
7710.2.82.204/3210.2.82.204 – 10.2.82.20410.2.82.204
7810.2.82.205/3210.2.82.205 – 10.2.82.20510.2.82.205
7910.2.82.206/3210.2.82.206 – 10.2.82.20610.2.82.206
8010.2.82.207/3210.2.82.207 – 10.2.82.20710.2.82.207
8110.2.82.208/3210.2.82.208 – 10.2.82.20810.2.82.208
8210.2.82.209/3210.2.82.209 – 10.2.82.20910.2.82.209
8310.2.82.210/3210.2.82.210 – 10.2.82.21010.2.82.210
8410.2.82.211/3210.2.82.211 – 10.2.82.21110.2.82.211
8510.2.82.212/3210.2.82.212 – 10.2.82.21210.2.82.212
8610.2.82.213/3210.2.82.213 – 10.2.82.21310.2.82.213
8710.2.82.214/3210.2.82.214 – 10.2.82.21410.2.82.214
8810.2.82.215/3210.2.82.215 – 10.2.82.21510.2.82.215
8910.2.82.216/3210.2.82.216 – 10.2.82.21610.2.82.216
9010.2.82.217/3210.2.82.217 – 10.2.82.21710.2.82.217
9110.2.82.218/3210.2.82.218 – 10.2.82.21810.2.82.218
9210.2.82.219/3210.2.82.219 – 10.2.82.21910.2.82.219
9310.2.82.220/3210.2.82.220 – 10.2.82.22010.2.82.220
9410.2.82.221/3210.2.82.221 – 10.2.82.22110.2.82.221
9510.2.82.222/3210.2.82.222 – 10.2.82.22210.2.82.222
9610.2.82.223/3210.2.82.223 – 10.2.82.22310.2.82.223
9710.2.82.224/3210.2.82.224 – 10.2.82.22410.2.82.224
9810.2.82.225/3210.2.82.225 – 10.2.82.22510.2.82.225
9910.2.82.226/3210.2.82.226 – 10.2.82.22610.2.82.226
10010.2.82.227/3210.2.82.227 – 10.2.82.22710.2.82.227
10110.2.82.228/3210.2.82.228 – 10.2.82.22810.2.82.228
10210.2.82.229/3210.2.82.229 – 10.2.82.22910.2.82.229
10310.2.82.230/3210.2.82.230 – 10.2.82.23010.2.82.230
10410.2.82.231/3210.2.82.231 – 10.2.82.23110.2.82.231
10510.2.82.232/3210.2.82.232 – 10.2.82.23210.2.82.232
10610.2.82.233/3210.2.82.233 – 10.2.82.23310.2.82.233
10710.2.82.234/3210.2.82.234 – 10.2.82.23410.2.82.234
10810.2.82.235/3210.2.82.235 – 10.2.82.23510.2.82.235
10910.2.82.236/3210.2.82.236 – 10.2.82.23610.2.82.236
11010.2.82.237/3210.2.82.237 – 10.2.82.23710.2.82.237
11110.2.82.238/3210.2.82.238 – 10.2.82.23810.2.82.238
11210.2.82.239/3210.2.82.239 – 10.2.82.23910.2.82.239
11310.2.82.240/3210.2.82.240 – 10.2.82.24010.2.82.240
11410.2.82.241/3210.2.82.241 – 10.2.82.24110.2.82.241
11510.2.82.242/3210.2.82.242 – 10.2.82.24210.2.82.242
11610.2.82.243/3210.2.82.243 – 10.2.82.24310.2.82.243
11710.2.82.244/3210.2.82.244 – 10.2.82.24410.2.82.244
11810.2.82.245/3210.2.82.245 – 10.2.82.24510.2.82.245
11910.2.82.246/3210.2.82.246 – 10.2.82.24610.2.82.246
12010.2.82.247/3210.2.82.247 – 10.2.82.24710.2.82.247
12110.2.82.248/3210.2.82.248 – 10.2.82.24810.2.82.248
12210.2.82.249/3210.2.82.249 – 10.2.82.24910.2.82.249
12310.2.82.250/3210.2.82.250 – 10.2.82.25010.2.82.250
12410.2.82.251/3210.2.82.251 – 10.2.82.25110.2.82.251
12510.2.82.252/3210.2.82.252 – 10.2.82.25210.2.82.252
12610.2.82.253/3210.2.82.253 – 10.2.82.25310.2.82.253
12710.2.82.254/3210.2.82.254 – 10.2.82.25410.2.82.254
12810.2.82.255/3210.2.82.255 – 10.2.82.25510.2.82.255
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 →