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)10.76.139.128/25
network10.76.139.128/25
broadcast10.76.139.255
first host10.76.139.129
last host10.76.139.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.76.139.128/25
address00001010.01001100.10001011.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.01001100.10001011.10000000
broadcast00001010.01001100.10001011.11111111
green = network part, grey = host part
hex0x0a4c8b80
decimal172788608
reverse dns128.139.76.10.in-addr.arpa
ipv4-mapped::ffff:a4c:8b80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.76.139.128/3210.76.139.128 – 10.76.139.12810.76.139.128
210.76.139.129/3210.76.139.129 – 10.76.139.12910.76.139.129
310.76.139.130/3210.76.139.130 – 10.76.139.13010.76.139.130
410.76.139.131/3210.76.139.131 – 10.76.139.13110.76.139.131
510.76.139.132/3210.76.139.132 – 10.76.139.13210.76.139.132
610.76.139.133/3210.76.139.133 – 10.76.139.13310.76.139.133
710.76.139.134/3210.76.139.134 – 10.76.139.13410.76.139.134
810.76.139.135/3210.76.139.135 – 10.76.139.13510.76.139.135
910.76.139.136/3210.76.139.136 – 10.76.139.13610.76.139.136
1010.76.139.137/3210.76.139.137 – 10.76.139.13710.76.139.137
1110.76.139.138/3210.76.139.138 – 10.76.139.13810.76.139.138
1210.76.139.139/3210.76.139.139 – 10.76.139.13910.76.139.139
1310.76.139.140/3210.76.139.140 – 10.76.139.14010.76.139.140
1410.76.139.141/3210.76.139.141 – 10.76.139.14110.76.139.141
1510.76.139.142/3210.76.139.142 – 10.76.139.14210.76.139.142
1610.76.139.143/3210.76.139.143 – 10.76.139.14310.76.139.143
1710.76.139.144/3210.76.139.144 – 10.76.139.14410.76.139.144
1810.76.139.145/3210.76.139.145 – 10.76.139.14510.76.139.145
1910.76.139.146/3210.76.139.146 – 10.76.139.14610.76.139.146
2010.76.139.147/3210.76.139.147 – 10.76.139.14710.76.139.147
2110.76.139.148/3210.76.139.148 – 10.76.139.14810.76.139.148
2210.76.139.149/3210.76.139.149 – 10.76.139.14910.76.139.149
2310.76.139.150/3210.76.139.150 – 10.76.139.15010.76.139.150
2410.76.139.151/3210.76.139.151 – 10.76.139.15110.76.139.151
2510.76.139.152/3210.76.139.152 – 10.76.139.15210.76.139.152
2610.76.139.153/3210.76.139.153 – 10.76.139.15310.76.139.153
2710.76.139.154/3210.76.139.154 – 10.76.139.15410.76.139.154
2810.76.139.155/3210.76.139.155 – 10.76.139.15510.76.139.155
2910.76.139.156/3210.76.139.156 – 10.76.139.15610.76.139.156
3010.76.139.157/3210.76.139.157 – 10.76.139.15710.76.139.157
3110.76.139.158/3210.76.139.158 – 10.76.139.15810.76.139.158
3210.76.139.159/3210.76.139.159 – 10.76.139.15910.76.139.159
3310.76.139.160/3210.76.139.160 – 10.76.139.16010.76.139.160
3410.76.139.161/3210.76.139.161 – 10.76.139.16110.76.139.161
3510.76.139.162/3210.76.139.162 – 10.76.139.16210.76.139.162
3610.76.139.163/3210.76.139.163 – 10.76.139.16310.76.139.163
3710.76.139.164/3210.76.139.164 – 10.76.139.16410.76.139.164
3810.76.139.165/3210.76.139.165 – 10.76.139.16510.76.139.165
3910.76.139.166/3210.76.139.166 – 10.76.139.16610.76.139.166
4010.76.139.167/3210.76.139.167 – 10.76.139.16710.76.139.167
4110.76.139.168/3210.76.139.168 – 10.76.139.16810.76.139.168
4210.76.139.169/3210.76.139.169 – 10.76.139.16910.76.139.169
4310.76.139.170/3210.76.139.170 – 10.76.139.17010.76.139.170
4410.76.139.171/3210.76.139.171 – 10.76.139.17110.76.139.171
4510.76.139.172/3210.76.139.172 – 10.76.139.17210.76.139.172
4610.76.139.173/3210.76.139.173 – 10.76.139.17310.76.139.173
4710.76.139.174/3210.76.139.174 – 10.76.139.17410.76.139.174
4810.76.139.175/3210.76.139.175 – 10.76.139.17510.76.139.175
4910.76.139.176/3210.76.139.176 – 10.76.139.17610.76.139.176
5010.76.139.177/3210.76.139.177 – 10.76.139.17710.76.139.177
5110.76.139.178/3210.76.139.178 – 10.76.139.17810.76.139.178
5210.76.139.179/3210.76.139.179 – 10.76.139.17910.76.139.179
5310.76.139.180/3210.76.139.180 – 10.76.139.18010.76.139.180
5410.76.139.181/3210.76.139.181 – 10.76.139.18110.76.139.181
5510.76.139.182/3210.76.139.182 – 10.76.139.18210.76.139.182
5610.76.139.183/3210.76.139.183 – 10.76.139.18310.76.139.183
5710.76.139.184/3210.76.139.184 – 10.76.139.18410.76.139.184
5810.76.139.185/3210.76.139.185 – 10.76.139.18510.76.139.185
5910.76.139.186/3210.76.139.186 – 10.76.139.18610.76.139.186
6010.76.139.187/3210.76.139.187 – 10.76.139.18710.76.139.187
6110.76.139.188/3210.76.139.188 – 10.76.139.18810.76.139.188
6210.76.139.189/3210.76.139.189 – 10.76.139.18910.76.139.189
6310.76.139.190/3210.76.139.190 – 10.76.139.19010.76.139.190
6410.76.139.191/3210.76.139.191 – 10.76.139.19110.76.139.191
6510.76.139.192/3210.76.139.192 – 10.76.139.19210.76.139.192
6610.76.139.193/3210.76.139.193 – 10.76.139.19310.76.139.193
6710.76.139.194/3210.76.139.194 – 10.76.139.19410.76.139.194
6810.76.139.195/3210.76.139.195 – 10.76.139.19510.76.139.195
6910.76.139.196/3210.76.139.196 – 10.76.139.19610.76.139.196
7010.76.139.197/3210.76.139.197 – 10.76.139.19710.76.139.197
7110.76.139.198/3210.76.139.198 – 10.76.139.19810.76.139.198
7210.76.139.199/3210.76.139.199 – 10.76.139.19910.76.139.199
7310.76.139.200/3210.76.139.200 – 10.76.139.20010.76.139.200
7410.76.139.201/3210.76.139.201 – 10.76.139.20110.76.139.201
7510.76.139.202/3210.76.139.202 – 10.76.139.20210.76.139.202
7610.76.139.203/3210.76.139.203 – 10.76.139.20310.76.139.203
7710.76.139.204/3210.76.139.204 – 10.76.139.20410.76.139.204
7810.76.139.205/3210.76.139.205 – 10.76.139.20510.76.139.205
7910.76.139.206/3210.76.139.206 – 10.76.139.20610.76.139.206
8010.76.139.207/3210.76.139.207 – 10.76.139.20710.76.139.207
8110.76.139.208/3210.76.139.208 – 10.76.139.20810.76.139.208
8210.76.139.209/3210.76.139.209 – 10.76.139.20910.76.139.209
8310.76.139.210/3210.76.139.210 – 10.76.139.21010.76.139.210
8410.76.139.211/3210.76.139.211 – 10.76.139.21110.76.139.211
8510.76.139.212/3210.76.139.212 – 10.76.139.21210.76.139.212
8610.76.139.213/3210.76.139.213 – 10.76.139.21310.76.139.213
8710.76.139.214/3210.76.139.214 – 10.76.139.21410.76.139.214
8810.76.139.215/3210.76.139.215 – 10.76.139.21510.76.139.215
8910.76.139.216/3210.76.139.216 – 10.76.139.21610.76.139.216
9010.76.139.217/3210.76.139.217 – 10.76.139.21710.76.139.217
9110.76.139.218/3210.76.139.218 – 10.76.139.21810.76.139.218
9210.76.139.219/3210.76.139.219 – 10.76.139.21910.76.139.219
9310.76.139.220/3210.76.139.220 – 10.76.139.22010.76.139.220
9410.76.139.221/3210.76.139.221 – 10.76.139.22110.76.139.221
9510.76.139.222/3210.76.139.222 – 10.76.139.22210.76.139.222
9610.76.139.223/3210.76.139.223 – 10.76.139.22310.76.139.223
9710.76.139.224/3210.76.139.224 – 10.76.139.22410.76.139.224
9810.76.139.225/3210.76.139.225 – 10.76.139.22510.76.139.225
9910.76.139.226/3210.76.139.226 – 10.76.139.22610.76.139.226
10010.76.139.227/3210.76.139.227 – 10.76.139.22710.76.139.227
10110.76.139.228/3210.76.139.228 – 10.76.139.22810.76.139.228
10210.76.139.229/3210.76.139.229 – 10.76.139.22910.76.139.229
10310.76.139.230/3210.76.139.230 – 10.76.139.23010.76.139.230
10410.76.139.231/3210.76.139.231 – 10.76.139.23110.76.139.231
10510.76.139.232/3210.76.139.232 – 10.76.139.23210.76.139.232
10610.76.139.233/3210.76.139.233 – 10.76.139.23310.76.139.233
10710.76.139.234/3210.76.139.234 – 10.76.139.23410.76.139.234
10810.76.139.235/3210.76.139.235 – 10.76.139.23510.76.139.235
10910.76.139.236/3210.76.139.236 – 10.76.139.23610.76.139.236
11010.76.139.237/3210.76.139.237 – 10.76.139.23710.76.139.237
11110.76.139.238/3210.76.139.238 – 10.76.139.23810.76.139.238
11210.76.139.239/3210.76.139.239 – 10.76.139.23910.76.139.239
11310.76.139.240/3210.76.139.240 – 10.76.139.24010.76.139.240
11410.76.139.241/3210.76.139.241 – 10.76.139.24110.76.139.241
11510.76.139.242/3210.76.139.242 – 10.76.139.24210.76.139.242
11610.76.139.243/3210.76.139.243 – 10.76.139.24310.76.139.243
11710.76.139.244/3210.76.139.244 – 10.76.139.24410.76.139.244
11810.76.139.245/3210.76.139.245 – 10.76.139.24510.76.139.245
11910.76.139.246/3210.76.139.246 – 10.76.139.24610.76.139.246
12010.76.139.247/3210.76.139.247 – 10.76.139.24710.76.139.247
12110.76.139.248/3210.76.139.248 – 10.76.139.24810.76.139.248
12210.76.139.249/3210.76.139.249 – 10.76.139.24910.76.139.249
12310.76.139.250/3210.76.139.250 – 10.76.139.25010.76.139.250
12410.76.139.251/3210.76.139.251 – 10.76.139.25110.76.139.251
12510.76.139.252/3210.76.139.252 – 10.76.139.25210.76.139.252
12610.76.139.253/3210.76.139.253 – 10.76.139.25310.76.139.253
12710.76.139.254/3210.76.139.254 – 10.76.139.25410.76.139.254
12810.76.139.255/3210.76.139.255 – 10.76.139.25510.76.139.255
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 →