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)10.3.69.128/25
network10.3.69.128/25
broadcast10.3.69.255
first host10.3.69.129
last host10.3.69.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.69.128/25
address00001010.00000011.01000101.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.01000101.10000000
broadcast00001010.00000011.01000101.11111111
green = network part, grey = host part
hex0x0a034580
decimal167986560
reverse dns128.69.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:4580

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.69.128/3210.3.69.128 – 10.3.69.12810.3.69.128
210.3.69.129/3210.3.69.129 – 10.3.69.12910.3.69.129
310.3.69.130/3210.3.69.130 – 10.3.69.13010.3.69.130
410.3.69.131/3210.3.69.131 – 10.3.69.13110.3.69.131
510.3.69.132/3210.3.69.132 – 10.3.69.13210.3.69.132
610.3.69.133/3210.3.69.133 – 10.3.69.13310.3.69.133
710.3.69.134/3210.3.69.134 – 10.3.69.13410.3.69.134
810.3.69.135/3210.3.69.135 – 10.3.69.13510.3.69.135
910.3.69.136/3210.3.69.136 – 10.3.69.13610.3.69.136
1010.3.69.137/3210.3.69.137 – 10.3.69.13710.3.69.137
1110.3.69.138/3210.3.69.138 – 10.3.69.13810.3.69.138
1210.3.69.139/3210.3.69.139 – 10.3.69.13910.3.69.139
1310.3.69.140/3210.3.69.140 – 10.3.69.14010.3.69.140
1410.3.69.141/3210.3.69.141 – 10.3.69.14110.3.69.141
1510.3.69.142/3210.3.69.142 – 10.3.69.14210.3.69.142
1610.3.69.143/3210.3.69.143 – 10.3.69.14310.3.69.143
1710.3.69.144/3210.3.69.144 – 10.3.69.14410.3.69.144
1810.3.69.145/3210.3.69.145 – 10.3.69.14510.3.69.145
1910.3.69.146/3210.3.69.146 – 10.3.69.14610.3.69.146
2010.3.69.147/3210.3.69.147 – 10.3.69.14710.3.69.147
2110.3.69.148/3210.3.69.148 – 10.3.69.14810.3.69.148
2210.3.69.149/3210.3.69.149 – 10.3.69.14910.3.69.149
2310.3.69.150/3210.3.69.150 – 10.3.69.15010.3.69.150
2410.3.69.151/3210.3.69.151 – 10.3.69.15110.3.69.151
2510.3.69.152/3210.3.69.152 – 10.3.69.15210.3.69.152
2610.3.69.153/3210.3.69.153 – 10.3.69.15310.3.69.153
2710.3.69.154/3210.3.69.154 – 10.3.69.15410.3.69.154
2810.3.69.155/3210.3.69.155 – 10.3.69.15510.3.69.155
2910.3.69.156/3210.3.69.156 – 10.3.69.15610.3.69.156
3010.3.69.157/3210.3.69.157 – 10.3.69.15710.3.69.157
3110.3.69.158/3210.3.69.158 – 10.3.69.15810.3.69.158
3210.3.69.159/3210.3.69.159 – 10.3.69.15910.3.69.159
3310.3.69.160/3210.3.69.160 – 10.3.69.16010.3.69.160
3410.3.69.161/3210.3.69.161 – 10.3.69.16110.3.69.161
3510.3.69.162/3210.3.69.162 – 10.3.69.16210.3.69.162
3610.3.69.163/3210.3.69.163 – 10.3.69.16310.3.69.163
3710.3.69.164/3210.3.69.164 – 10.3.69.16410.3.69.164
3810.3.69.165/3210.3.69.165 – 10.3.69.16510.3.69.165
3910.3.69.166/3210.3.69.166 – 10.3.69.16610.3.69.166
4010.3.69.167/3210.3.69.167 – 10.3.69.16710.3.69.167
4110.3.69.168/3210.3.69.168 – 10.3.69.16810.3.69.168
4210.3.69.169/3210.3.69.169 – 10.3.69.16910.3.69.169
4310.3.69.170/3210.3.69.170 – 10.3.69.17010.3.69.170
4410.3.69.171/3210.3.69.171 – 10.3.69.17110.3.69.171
4510.3.69.172/3210.3.69.172 – 10.3.69.17210.3.69.172
4610.3.69.173/3210.3.69.173 – 10.3.69.17310.3.69.173
4710.3.69.174/3210.3.69.174 – 10.3.69.17410.3.69.174
4810.3.69.175/3210.3.69.175 – 10.3.69.17510.3.69.175
4910.3.69.176/3210.3.69.176 – 10.3.69.17610.3.69.176
5010.3.69.177/3210.3.69.177 – 10.3.69.17710.3.69.177
5110.3.69.178/3210.3.69.178 – 10.3.69.17810.3.69.178
5210.3.69.179/3210.3.69.179 – 10.3.69.17910.3.69.179
5310.3.69.180/3210.3.69.180 – 10.3.69.18010.3.69.180
5410.3.69.181/3210.3.69.181 – 10.3.69.18110.3.69.181
5510.3.69.182/3210.3.69.182 – 10.3.69.18210.3.69.182
5610.3.69.183/3210.3.69.183 – 10.3.69.18310.3.69.183
5710.3.69.184/3210.3.69.184 – 10.3.69.18410.3.69.184
5810.3.69.185/3210.3.69.185 – 10.3.69.18510.3.69.185
5910.3.69.186/3210.3.69.186 – 10.3.69.18610.3.69.186
6010.3.69.187/3210.3.69.187 – 10.3.69.18710.3.69.187
6110.3.69.188/3210.3.69.188 – 10.3.69.18810.3.69.188
6210.3.69.189/3210.3.69.189 – 10.3.69.18910.3.69.189
6310.3.69.190/3210.3.69.190 – 10.3.69.19010.3.69.190
6410.3.69.191/3210.3.69.191 – 10.3.69.19110.3.69.191
6510.3.69.192/3210.3.69.192 – 10.3.69.19210.3.69.192
6610.3.69.193/3210.3.69.193 – 10.3.69.19310.3.69.193
6710.3.69.194/3210.3.69.194 – 10.3.69.19410.3.69.194
6810.3.69.195/3210.3.69.195 – 10.3.69.19510.3.69.195
6910.3.69.196/3210.3.69.196 – 10.3.69.19610.3.69.196
7010.3.69.197/3210.3.69.197 – 10.3.69.19710.3.69.197
7110.3.69.198/3210.3.69.198 – 10.3.69.19810.3.69.198
7210.3.69.199/3210.3.69.199 – 10.3.69.19910.3.69.199
7310.3.69.200/3210.3.69.200 – 10.3.69.20010.3.69.200
7410.3.69.201/3210.3.69.201 – 10.3.69.20110.3.69.201
7510.3.69.202/3210.3.69.202 – 10.3.69.20210.3.69.202
7610.3.69.203/3210.3.69.203 – 10.3.69.20310.3.69.203
7710.3.69.204/3210.3.69.204 – 10.3.69.20410.3.69.204
7810.3.69.205/3210.3.69.205 – 10.3.69.20510.3.69.205
7910.3.69.206/3210.3.69.206 – 10.3.69.20610.3.69.206
8010.3.69.207/3210.3.69.207 – 10.3.69.20710.3.69.207
8110.3.69.208/3210.3.69.208 – 10.3.69.20810.3.69.208
8210.3.69.209/3210.3.69.209 – 10.3.69.20910.3.69.209
8310.3.69.210/3210.3.69.210 – 10.3.69.21010.3.69.210
8410.3.69.211/3210.3.69.211 – 10.3.69.21110.3.69.211
8510.3.69.212/3210.3.69.212 – 10.3.69.21210.3.69.212
8610.3.69.213/3210.3.69.213 – 10.3.69.21310.3.69.213
8710.3.69.214/3210.3.69.214 – 10.3.69.21410.3.69.214
8810.3.69.215/3210.3.69.215 – 10.3.69.21510.3.69.215
8910.3.69.216/3210.3.69.216 – 10.3.69.21610.3.69.216
9010.3.69.217/3210.3.69.217 – 10.3.69.21710.3.69.217
9110.3.69.218/3210.3.69.218 – 10.3.69.21810.3.69.218
9210.3.69.219/3210.3.69.219 – 10.3.69.21910.3.69.219
9310.3.69.220/3210.3.69.220 – 10.3.69.22010.3.69.220
9410.3.69.221/3210.3.69.221 – 10.3.69.22110.3.69.221
9510.3.69.222/3210.3.69.222 – 10.3.69.22210.3.69.222
9610.3.69.223/3210.3.69.223 – 10.3.69.22310.3.69.223
9710.3.69.224/3210.3.69.224 – 10.3.69.22410.3.69.224
9810.3.69.225/3210.3.69.225 – 10.3.69.22510.3.69.225
9910.3.69.226/3210.3.69.226 – 10.3.69.22610.3.69.226
10010.3.69.227/3210.3.69.227 – 10.3.69.22710.3.69.227
10110.3.69.228/3210.3.69.228 – 10.3.69.22810.3.69.228
10210.3.69.229/3210.3.69.229 – 10.3.69.22910.3.69.229
10310.3.69.230/3210.3.69.230 – 10.3.69.23010.3.69.230
10410.3.69.231/3210.3.69.231 – 10.3.69.23110.3.69.231
10510.3.69.232/3210.3.69.232 – 10.3.69.23210.3.69.232
10610.3.69.233/3210.3.69.233 – 10.3.69.23310.3.69.233
10710.3.69.234/3210.3.69.234 – 10.3.69.23410.3.69.234
10810.3.69.235/3210.3.69.235 – 10.3.69.23510.3.69.235
10910.3.69.236/3210.3.69.236 – 10.3.69.23610.3.69.236
11010.3.69.237/3210.3.69.237 – 10.3.69.23710.3.69.237
11110.3.69.238/3210.3.69.238 – 10.3.69.23810.3.69.238
11210.3.69.239/3210.3.69.239 – 10.3.69.23910.3.69.239
11310.3.69.240/3210.3.69.240 – 10.3.69.24010.3.69.240
11410.3.69.241/3210.3.69.241 – 10.3.69.24110.3.69.241
11510.3.69.242/3210.3.69.242 – 10.3.69.24210.3.69.242
11610.3.69.243/3210.3.69.243 – 10.3.69.24310.3.69.243
11710.3.69.244/3210.3.69.244 – 10.3.69.24410.3.69.244
11810.3.69.245/3210.3.69.245 – 10.3.69.24510.3.69.245
11910.3.69.246/3210.3.69.246 – 10.3.69.24610.3.69.246
12010.3.69.247/3210.3.69.247 – 10.3.69.24710.3.69.247
12110.3.69.248/3210.3.69.248 – 10.3.69.24810.3.69.248
12210.3.69.249/3210.3.69.249 – 10.3.69.24910.3.69.249
12310.3.69.250/3210.3.69.250 – 10.3.69.25010.3.69.250
12410.3.69.251/3210.3.69.251 – 10.3.69.25110.3.69.251
12510.3.69.252/3210.3.69.252 – 10.3.69.25210.3.69.252
12610.3.69.253/3210.3.69.253 – 10.3.69.25310.3.69.253
12710.3.69.254/3210.3.69.254 – 10.3.69.25410.3.69.254
12810.3.69.255/3210.3.69.255 – 10.3.69.25510.3.69.255
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 →