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)10.3.89.128/25
network10.3.89.128/25
broadcast10.3.89.255
first host10.3.89.129
last host10.3.89.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.89.128/25
address00001010.00000011.01011001.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.01011001.10000000
broadcast00001010.00000011.01011001.11111111
green = network part, grey = host part
hex0x0a035980
decimal167991680
reverse dns128.89.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:5980

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.89.128/3210.3.89.128 – 10.3.89.12810.3.89.128
210.3.89.129/3210.3.89.129 – 10.3.89.12910.3.89.129
310.3.89.130/3210.3.89.130 – 10.3.89.13010.3.89.130
410.3.89.131/3210.3.89.131 – 10.3.89.13110.3.89.131
510.3.89.132/3210.3.89.132 – 10.3.89.13210.3.89.132
610.3.89.133/3210.3.89.133 – 10.3.89.13310.3.89.133
710.3.89.134/3210.3.89.134 – 10.3.89.13410.3.89.134
810.3.89.135/3210.3.89.135 – 10.3.89.13510.3.89.135
910.3.89.136/3210.3.89.136 – 10.3.89.13610.3.89.136
1010.3.89.137/3210.3.89.137 – 10.3.89.13710.3.89.137
1110.3.89.138/3210.3.89.138 – 10.3.89.13810.3.89.138
1210.3.89.139/3210.3.89.139 – 10.3.89.13910.3.89.139
1310.3.89.140/3210.3.89.140 – 10.3.89.14010.3.89.140
1410.3.89.141/3210.3.89.141 – 10.3.89.14110.3.89.141
1510.3.89.142/3210.3.89.142 – 10.3.89.14210.3.89.142
1610.3.89.143/3210.3.89.143 – 10.3.89.14310.3.89.143
1710.3.89.144/3210.3.89.144 – 10.3.89.14410.3.89.144
1810.3.89.145/3210.3.89.145 – 10.3.89.14510.3.89.145
1910.3.89.146/3210.3.89.146 – 10.3.89.14610.3.89.146
2010.3.89.147/3210.3.89.147 – 10.3.89.14710.3.89.147
2110.3.89.148/3210.3.89.148 – 10.3.89.14810.3.89.148
2210.3.89.149/3210.3.89.149 – 10.3.89.14910.3.89.149
2310.3.89.150/3210.3.89.150 – 10.3.89.15010.3.89.150
2410.3.89.151/3210.3.89.151 – 10.3.89.15110.3.89.151
2510.3.89.152/3210.3.89.152 – 10.3.89.15210.3.89.152
2610.3.89.153/3210.3.89.153 – 10.3.89.15310.3.89.153
2710.3.89.154/3210.3.89.154 – 10.3.89.15410.3.89.154
2810.3.89.155/3210.3.89.155 – 10.3.89.15510.3.89.155
2910.3.89.156/3210.3.89.156 – 10.3.89.15610.3.89.156
3010.3.89.157/3210.3.89.157 – 10.3.89.15710.3.89.157
3110.3.89.158/3210.3.89.158 – 10.3.89.15810.3.89.158
3210.3.89.159/3210.3.89.159 – 10.3.89.15910.3.89.159
3310.3.89.160/3210.3.89.160 – 10.3.89.16010.3.89.160
3410.3.89.161/3210.3.89.161 – 10.3.89.16110.3.89.161
3510.3.89.162/3210.3.89.162 – 10.3.89.16210.3.89.162
3610.3.89.163/3210.3.89.163 – 10.3.89.16310.3.89.163
3710.3.89.164/3210.3.89.164 – 10.3.89.16410.3.89.164
3810.3.89.165/3210.3.89.165 – 10.3.89.16510.3.89.165
3910.3.89.166/3210.3.89.166 – 10.3.89.16610.3.89.166
4010.3.89.167/3210.3.89.167 – 10.3.89.16710.3.89.167
4110.3.89.168/3210.3.89.168 – 10.3.89.16810.3.89.168
4210.3.89.169/3210.3.89.169 – 10.3.89.16910.3.89.169
4310.3.89.170/3210.3.89.170 – 10.3.89.17010.3.89.170
4410.3.89.171/3210.3.89.171 – 10.3.89.17110.3.89.171
4510.3.89.172/3210.3.89.172 – 10.3.89.17210.3.89.172
4610.3.89.173/3210.3.89.173 – 10.3.89.17310.3.89.173
4710.3.89.174/3210.3.89.174 – 10.3.89.17410.3.89.174
4810.3.89.175/3210.3.89.175 – 10.3.89.17510.3.89.175
4910.3.89.176/3210.3.89.176 – 10.3.89.17610.3.89.176
5010.3.89.177/3210.3.89.177 – 10.3.89.17710.3.89.177
5110.3.89.178/3210.3.89.178 – 10.3.89.17810.3.89.178
5210.3.89.179/3210.3.89.179 – 10.3.89.17910.3.89.179
5310.3.89.180/3210.3.89.180 – 10.3.89.18010.3.89.180
5410.3.89.181/3210.3.89.181 – 10.3.89.18110.3.89.181
5510.3.89.182/3210.3.89.182 – 10.3.89.18210.3.89.182
5610.3.89.183/3210.3.89.183 – 10.3.89.18310.3.89.183
5710.3.89.184/3210.3.89.184 – 10.3.89.18410.3.89.184
5810.3.89.185/3210.3.89.185 – 10.3.89.18510.3.89.185
5910.3.89.186/3210.3.89.186 – 10.3.89.18610.3.89.186
6010.3.89.187/3210.3.89.187 – 10.3.89.18710.3.89.187
6110.3.89.188/3210.3.89.188 – 10.3.89.18810.3.89.188
6210.3.89.189/3210.3.89.189 – 10.3.89.18910.3.89.189
6310.3.89.190/3210.3.89.190 – 10.3.89.19010.3.89.190
6410.3.89.191/3210.3.89.191 – 10.3.89.19110.3.89.191
6510.3.89.192/3210.3.89.192 – 10.3.89.19210.3.89.192
6610.3.89.193/3210.3.89.193 – 10.3.89.19310.3.89.193
6710.3.89.194/3210.3.89.194 – 10.3.89.19410.3.89.194
6810.3.89.195/3210.3.89.195 – 10.3.89.19510.3.89.195
6910.3.89.196/3210.3.89.196 – 10.3.89.19610.3.89.196
7010.3.89.197/3210.3.89.197 – 10.3.89.19710.3.89.197
7110.3.89.198/3210.3.89.198 – 10.3.89.19810.3.89.198
7210.3.89.199/3210.3.89.199 – 10.3.89.19910.3.89.199
7310.3.89.200/3210.3.89.200 – 10.3.89.20010.3.89.200
7410.3.89.201/3210.3.89.201 – 10.3.89.20110.3.89.201
7510.3.89.202/3210.3.89.202 – 10.3.89.20210.3.89.202
7610.3.89.203/3210.3.89.203 – 10.3.89.20310.3.89.203
7710.3.89.204/3210.3.89.204 – 10.3.89.20410.3.89.204
7810.3.89.205/3210.3.89.205 – 10.3.89.20510.3.89.205
7910.3.89.206/3210.3.89.206 – 10.3.89.20610.3.89.206
8010.3.89.207/3210.3.89.207 – 10.3.89.20710.3.89.207
8110.3.89.208/3210.3.89.208 – 10.3.89.20810.3.89.208
8210.3.89.209/3210.3.89.209 – 10.3.89.20910.3.89.209
8310.3.89.210/3210.3.89.210 – 10.3.89.21010.3.89.210
8410.3.89.211/3210.3.89.211 – 10.3.89.21110.3.89.211
8510.3.89.212/3210.3.89.212 – 10.3.89.21210.3.89.212
8610.3.89.213/3210.3.89.213 – 10.3.89.21310.3.89.213
8710.3.89.214/3210.3.89.214 – 10.3.89.21410.3.89.214
8810.3.89.215/3210.3.89.215 – 10.3.89.21510.3.89.215
8910.3.89.216/3210.3.89.216 – 10.3.89.21610.3.89.216
9010.3.89.217/3210.3.89.217 – 10.3.89.21710.3.89.217
9110.3.89.218/3210.3.89.218 – 10.3.89.21810.3.89.218
9210.3.89.219/3210.3.89.219 – 10.3.89.21910.3.89.219
9310.3.89.220/3210.3.89.220 – 10.3.89.22010.3.89.220
9410.3.89.221/3210.3.89.221 – 10.3.89.22110.3.89.221
9510.3.89.222/3210.3.89.222 – 10.3.89.22210.3.89.222
9610.3.89.223/3210.3.89.223 – 10.3.89.22310.3.89.223
9710.3.89.224/3210.3.89.224 – 10.3.89.22410.3.89.224
9810.3.89.225/3210.3.89.225 – 10.3.89.22510.3.89.225
9910.3.89.226/3210.3.89.226 – 10.3.89.22610.3.89.226
10010.3.89.227/3210.3.89.227 – 10.3.89.22710.3.89.227
10110.3.89.228/3210.3.89.228 – 10.3.89.22810.3.89.228
10210.3.89.229/3210.3.89.229 – 10.3.89.22910.3.89.229
10310.3.89.230/3210.3.89.230 – 10.3.89.23010.3.89.230
10410.3.89.231/3210.3.89.231 – 10.3.89.23110.3.89.231
10510.3.89.232/3210.3.89.232 – 10.3.89.23210.3.89.232
10610.3.89.233/3210.3.89.233 – 10.3.89.23310.3.89.233
10710.3.89.234/3210.3.89.234 – 10.3.89.23410.3.89.234
10810.3.89.235/3210.3.89.235 – 10.3.89.23510.3.89.235
10910.3.89.236/3210.3.89.236 – 10.3.89.23610.3.89.236
11010.3.89.237/3210.3.89.237 – 10.3.89.23710.3.89.237
11110.3.89.238/3210.3.89.238 – 10.3.89.23810.3.89.238
11210.3.89.239/3210.3.89.239 – 10.3.89.23910.3.89.239
11310.3.89.240/3210.3.89.240 – 10.3.89.24010.3.89.240
11410.3.89.241/3210.3.89.241 – 10.3.89.24110.3.89.241
11510.3.89.242/3210.3.89.242 – 10.3.89.24210.3.89.242
11610.3.89.243/3210.3.89.243 – 10.3.89.24310.3.89.243
11710.3.89.244/3210.3.89.244 – 10.3.89.24410.3.89.244
11810.3.89.245/3210.3.89.245 – 10.3.89.24510.3.89.245
11910.3.89.246/3210.3.89.246 – 10.3.89.24610.3.89.246
12010.3.89.247/3210.3.89.247 – 10.3.89.24710.3.89.247
12110.3.89.248/3210.3.89.248 – 10.3.89.24810.3.89.248
12210.3.89.249/3210.3.89.249 – 10.3.89.24910.3.89.249
12310.3.89.250/3210.3.89.250 – 10.3.89.25010.3.89.250
12410.3.89.251/3210.3.89.251 – 10.3.89.25110.3.89.251
12510.3.89.252/3210.3.89.252 – 10.3.89.25210.3.89.252
12610.3.89.253/3210.3.89.253 – 10.3.89.25310.3.89.253
12710.3.89.254/3210.3.89.254 – 10.3.89.25410.3.89.254
12810.3.89.255/3210.3.89.255 – 10.3.89.25510.3.89.255
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 →