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)10.0.80.128/25
network10.0.80.128/25
broadcast10.0.80.255
first host10.0.80.129
last host10.0.80.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.0.80.128/25
address00001010.00000000.01010000.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000000.01010000.10000000
broadcast00001010.00000000.01010000.11111111
green = network part, grey = host part
hex0x0a005080
decimal167792768
reverse dns128.80.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:5080

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.0.80.128/3210.0.80.128 – 10.0.80.12810.0.80.128
210.0.80.129/3210.0.80.129 – 10.0.80.12910.0.80.129
310.0.80.130/3210.0.80.130 – 10.0.80.13010.0.80.130
410.0.80.131/3210.0.80.131 – 10.0.80.13110.0.80.131
510.0.80.132/3210.0.80.132 – 10.0.80.13210.0.80.132
610.0.80.133/3210.0.80.133 – 10.0.80.13310.0.80.133
710.0.80.134/3210.0.80.134 – 10.0.80.13410.0.80.134
810.0.80.135/3210.0.80.135 – 10.0.80.13510.0.80.135
910.0.80.136/3210.0.80.136 – 10.0.80.13610.0.80.136
1010.0.80.137/3210.0.80.137 – 10.0.80.13710.0.80.137
1110.0.80.138/3210.0.80.138 – 10.0.80.13810.0.80.138
1210.0.80.139/3210.0.80.139 – 10.0.80.13910.0.80.139
1310.0.80.140/3210.0.80.140 – 10.0.80.14010.0.80.140
1410.0.80.141/3210.0.80.141 – 10.0.80.14110.0.80.141
1510.0.80.142/3210.0.80.142 – 10.0.80.14210.0.80.142
1610.0.80.143/3210.0.80.143 – 10.0.80.14310.0.80.143
1710.0.80.144/3210.0.80.144 – 10.0.80.14410.0.80.144
1810.0.80.145/3210.0.80.145 – 10.0.80.14510.0.80.145
1910.0.80.146/3210.0.80.146 – 10.0.80.14610.0.80.146
2010.0.80.147/3210.0.80.147 – 10.0.80.14710.0.80.147
2110.0.80.148/3210.0.80.148 – 10.0.80.14810.0.80.148
2210.0.80.149/3210.0.80.149 – 10.0.80.14910.0.80.149
2310.0.80.150/3210.0.80.150 – 10.0.80.15010.0.80.150
2410.0.80.151/3210.0.80.151 – 10.0.80.15110.0.80.151
2510.0.80.152/3210.0.80.152 – 10.0.80.15210.0.80.152
2610.0.80.153/3210.0.80.153 – 10.0.80.15310.0.80.153
2710.0.80.154/3210.0.80.154 – 10.0.80.15410.0.80.154
2810.0.80.155/3210.0.80.155 – 10.0.80.15510.0.80.155
2910.0.80.156/3210.0.80.156 – 10.0.80.15610.0.80.156
3010.0.80.157/3210.0.80.157 – 10.0.80.15710.0.80.157
3110.0.80.158/3210.0.80.158 – 10.0.80.15810.0.80.158
3210.0.80.159/3210.0.80.159 – 10.0.80.15910.0.80.159
3310.0.80.160/3210.0.80.160 – 10.0.80.16010.0.80.160
3410.0.80.161/3210.0.80.161 – 10.0.80.16110.0.80.161
3510.0.80.162/3210.0.80.162 – 10.0.80.16210.0.80.162
3610.0.80.163/3210.0.80.163 – 10.0.80.16310.0.80.163
3710.0.80.164/3210.0.80.164 – 10.0.80.16410.0.80.164
3810.0.80.165/3210.0.80.165 – 10.0.80.16510.0.80.165
3910.0.80.166/3210.0.80.166 – 10.0.80.16610.0.80.166
4010.0.80.167/3210.0.80.167 – 10.0.80.16710.0.80.167
4110.0.80.168/3210.0.80.168 – 10.0.80.16810.0.80.168
4210.0.80.169/3210.0.80.169 – 10.0.80.16910.0.80.169
4310.0.80.170/3210.0.80.170 – 10.0.80.17010.0.80.170
4410.0.80.171/3210.0.80.171 – 10.0.80.17110.0.80.171
4510.0.80.172/3210.0.80.172 – 10.0.80.17210.0.80.172
4610.0.80.173/3210.0.80.173 – 10.0.80.17310.0.80.173
4710.0.80.174/3210.0.80.174 – 10.0.80.17410.0.80.174
4810.0.80.175/3210.0.80.175 – 10.0.80.17510.0.80.175
4910.0.80.176/3210.0.80.176 – 10.0.80.17610.0.80.176
5010.0.80.177/3210.0.80.177 – 10.0.80.17710.0.80.177
5110.0.80.178/3210.0.80.178 – 10.0.80.17810.0.80.178
5210.0.80.179/3210.0.80.179 – 10.0.80.17910.0.80.179
5310.0.80.180/3210.0.80.180 – 10.0.80.18010.0.80.180
5410.0.80.181/3210.0.80.181 – 10.0.80.18110.0.80.181
5510.0.80.182/3210.0.80.182 – 10.0.80.18210.0.80.182
5610.0.80.183/3210.0.80.183 – 10.0.80.18310.0.80.183
5710.0.80.184/3210.0.80.184 – 10.0.80.18410.0.80.184
5810.0.80.185/3210.0.80.185 – 10.0.80.18510.0.80.185
5910.0.80.186/3210.0.80.186 – 10.0.80.18610.0.80.186
6010.0.80.187/3210.0.80.187 – 10.0.80.18710.0.80.187
6110.0.80.188/3210.0.80.188 – 10.0.80.18810.0.80.188
6210.0.80.189/3210.0.80.189 – 10.0.80.18910.0.80.189
6310.0.80.190/3210.0.80.190 – 10.0.80.19010.0.80.190
6410.0.80.191/3210.0.80.191 – 10.0.80.19110.0.80.191
6510.0.80.192/3210.0.80.192 – 10.0.80.19210.0.80.192
6610.0.80.193/3210.0.80.193 – 10.0.80.19310.0.80.193
6710.0.80.194/3210.0.80.194 – 10.0.80.19410.0.80.194
6810.0.80.195/3210.0.80.195 – 10.0.80.19510.0.80.195
6910.0.80.196/3210.0.80.196 – 10.0.80.19610.0.80.196
7010.0.80.197/3210.0.80.197 – 10.0.80.19710.0.80.197
7110.0.80.198/3210.0.80.198 – 10.0.80.19810.0.80.198
7210.0.80.199/3210.0.80.199 – 10.0.80.19910.0.80.199
7310.0.80.200/3210.0.80.200 – 10.0.80.20010.0.80.200
7410.0.80.201/3210.0.80.201 – 10.0.80.20110.0.80.201
7510.0.80.202/3210.0.80.202 – 10.0.80.20210.0.80.202
7610.0.80.203/3210.0.80.203 – 10.0.80.20310.0.80.203
7710.0.80.204/3210.0.80.204 – 10.0.80.20410.0.80.204
7810.0.80.205/3210.0.80.205 – 10.0.80.20510.0.80.205
7910.0.80.206/3210.0.80.206 – 10.0.80.20610.0.80.206
8010.0.80.207/3210.0.80.207 – 10.0.80.20710.0.80.207
8110.0.80.208/3210.0.80.208 – 10.0.80.20810.0.80.208
8210.0.80.209/3210.0.80.209 – 10.0.80.20910.0.80.209
8310.0.80.210/3210.0.80.210 – 10.0.80.21010.0.80.210
8410.0.80.211/3210.0.80.211 – 10.0.80.21110.0.80.211
8510.0.80.212/3210.0.80.212 – 10.0.80.21210.0.80.212
8610.0.80.213/3210.0.80.213 – 10.0.80.21310.0.80.213
8710.0.80.214/3210.0.80.214 – 10.0.80.21410.0.80.214
8810.0.80.215/3210.0.80.215 – 10.0.80.21510.0.80.215
8910.0.80.216/3210.0.80.216 – 10.0.80.21610.0.80.216
9010.0.80.217/3210.0.80.217 – 10.0.80.21710.0.80.217
9110.0.80.218/3210.0.80.218 – 10.0.80.21810.0.80.218
9210.0.80.219/3210.0.80.219 – 10.0.80.21910.0.80.219
9310.0.80.220/3210.0.80.220 – 10.0.80.22010.0.80.220
9410.0.80.221/3210.0.80.221 – 10.0.80.22110.0.80.221
9510.0.80.222/3210.0.80.222 – 10.0.80.22210.0.80.222
9610.0.80.223/3210.0.80.223 – 10.0.80.22310.0.80.223
9710.0.80.224/3210.0.80.224 – 10.0.80.22410.0.80.224
9810.0.80.225/3210.0.80.225 – 10.0.80.22510.0.80.225
9910.0.80.226/3210.0.80.226 – 10.0.80.22610.0.80.226
10010.0.80.227/3210.0.80.227 – 10.0.80.22710.0.80.227
10110.0.80.228/3210.0.80.228 – 10.0.80.22810.0.80.228
10210.0.80.229/3210.0.80.229 – 10.0.80.22910.0.80.229
10310.0.80.230/3210.0.80.230 – 10.0.80.23010.0.80.230
10410.0.80.231/3210.0.80.231 – 10.0.80.23110.0.80.231
10510.0.80.232/3210.0.80.232 – 10.0.80.23210.0.80.232
10610.0.80.233/3210.0.80.233 – 10.0.80.23310.0.80.233
10710.0.80.234/3210.0.80.234 – 10.0.80.23410.0.80.234
10810.0.80.235/3210.0.80.235 – 10.0.80.23510.0.80.235
10910.0.80.236/3210.0.80.236 – 10.0.80.23610.0.80.236
11010.0.80.237/3210.0.80.237 – 10.0.80.23710.0.80.237
11110.0.80.238/3210.0.80.238 – 10.0.80.23810.0.80.238
11210.0.80.239/3210.0.80.239 – 10.0.80.23910.0.80.239
11310.0.80.240/3210.0.80.240 – 10.0.80.24010.0.80.240
11410.0.80.241/3210.0.80.241 – 10.0.80.24110.0.80.241
11510.0.80.242/3210.0.80.242 – 10.0.80.24210.0.80.242
11610.0.80.243/3210.0.80.243 – 10.0.80.24310.0.80.243
11710.0.80.244/3210.0.80.244 – 10.0.80.24410.0.80.244
11810.0.80.245/3210.0.80.245 – 10.0.80.24510.0.80.245
11910.0.80.246/3210.0.80.246 – 10.0.80.24610.0.80.246
12010.0.80.247/3210.0.80.247 – 10.0.80.24710.0.80.247
12110.0.80.248/3210.0.80.248 – 10.0.80.24810.0.80.248
12210.0.80.249/3210.0.80.249 – 10.0.80.24910.0.80.249
12310.0.80.250/3210.0.80.250 – 10.0.80.25010.0.80.250
12410.0.80.251/3210.0.80.251 – 10.0.80.25110.0.80.251
12510.0.80.252/3210.0.80.252 – 10.0.80.25210.0.80.252
12610.0.80.253/3210.0.80.253 – 10.0.80.25310.0.80.253
12710.0.80.254/3210.0.80.254 – 10.0.80.25410.0.80.254
12810.0.80.255/3210.0.80.255 – 10.0.80.25510.0.80.255
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 →