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)10.3.44.128/25
network10.3.44.128/25
broadcast10.3.44.255
first host10.3.44.129
last host10.3.44.254
subnet mask255.255.255.128
wildcard0.0.0.127
addresses128
usable hosts126
classA
ipcalc 10.3.44.128/25
address00001010.00000011.00101100.10000000
subnet mask11111111.11111111.11111111.10000000
network00001010.00000011.00101100.10000000
broadcast00001010.00000011.00101100.11111111
green = network part, grey = host part
hex0x0a032c80
decimal167980160
reverse dns128.44.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:2c80

/25 split into /32 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.44.128/3210.3.44.128 – 10.3.44.12810.3.44.128
210.3.44.129/3210.3.44.129 – 10.3.44.12910.3.44.129
310.3.44.130/3210.3.44.130 – 10.3.44.13010.3.44.130
410.3.44.131/3210.3.44.131 – 10.3.44.13110.3.44.131
510.3.44.132/3210.3.44.132 – 10.3.44.13210.3.44.132
610.3.44.133/3210.3.44.133 – 10.3.44.13310.3.44.133
710.3.44.134/3210.3.44.134 – 10.3.44.13410.3.44.134
810.3.44.135/3210.3.44.135 – 10.3.44.13510.3.44.135
910.3.44.136/3210.3.44.136 – 10.3.44.13610.3.44.136
1010.3.44.137/3210.3.44.137 – 10.3.44.13710.3.44.137
1110.3.44.138/3210.3.44.138 – 10.3.44.13810.3.44.138
1210.3.44.139/3210.3.44.139 – 10.3.44.13910.3.44.139
1310.3.44.140/3210.3.44.140 – 10.3.44.14010.3.44.140
1410.3.44.141/3210.3.44.141 – 10.3.44.14110.3.44.141
1510.3.44.142/3210.3.44.142 – 10.3.44.14210.3.44.142
1610.3.44.143/3210.3.44.143 – 10.3.44.14310.3.44.143
1710.3.44.144/3210.3.44.144 – 10.3.44.14410.3.44.144
1810.3.44.145/3210.3.44.145 – 10.3.44.14510.3.44.145
1910.3.44.146/3210.3.44.146 – 10.3.44.14610.3.44.146
2010.3.44.147/3210.3.44.147 – 10.3.44.14710.3.44.147
2110.3.44.148/3210.3.44.148 – 10.3.44.14810.3.44.148
2210.3.44.149/3210.3.44.149 – 10.3.44.14910.3.44.149
2310.3.44.150/3210.3.44.150 – 10.3.44.15010.3.44.150
2410.3.44.151/3210.3.44.151 – 10.3.44.15110.3.44.151
2510.3.44.152/3210.3.44.152 – 10.3.44.15210.3.44.152
2610.3.44.153/3210.3.44.153 – 10.3.44.15310.3.44.153
2710.3.44.154/3210.3.44.154 – 10.3.44.15410.3.44.154
2810.3.44.155/3210.3.44.155 – 10.3.44.15510.3.44.155
2910.3.44.156/3210.3.44.156 – 10.3.44.15610.3.44.156
3010.3.44.157/3210.3.44.157 – 10.3.44.15710.3.44.157
3110.3.44.158/3210.3.44.158 – 10.3.44.15810.3.44.158
3210.3.44.159/3210.3.44.159 – 10.3.44.15910.3.44.159
3310.3.44.160/3210.3.44.160 – 10.3.44.16010.3.44.160
3410.3.44.161/3210.3.44.161 – 10.3.44.16110.3.44.161
3510.3.44.162/3210.3.44.162 – 10.3.44.16210.3.44.162
3610.3.44.163/3210.3.44.163 – 10.3.44.16310.3.44.163
3710.3.44.164/3210.3.44.164 – 10.3.44.16410.3.44.164
3810.3.44.165/3210.3.44.165 – 10.3.44.16510.3.44.165
3910.3.44.166/3210.3.44.166 – 10.3.44.16610.3.44.166
4010.3.44.167/3210.3.44.167 – 10.3.44.16710.3.44.167
4110.3.44.168/3210.3.44.168 – 10.3.44.16810.3.44.168
4210.3.44.169/3210.3.44.169 – 10.3.44.16910.3.44.169
4310.3.44.170/3210.3.44.170 – 10.3.44.17010.3.44.170
4410.3.44.171/3210.3.44.171 – 10.3.44.17110.3.44.171
4510.3.44.172/3210.3.44.172 – 10.3.44.17210.3.44.172
4610.3.44.173/3210.3.44.173 – 10.3.44.17310.3.44.173
4710.3.44.174/3210.3.44.174 – 10.3.44.17410.3.44.174
4810.3.44.175/3210.3.44.175 – 10.3.44.17510.3.44.175
4910.3.44.176/3210.3.44.176 – 10.3.44.17610.3.44.176
5010.3.44.177/3210.3.44.177 – 10.3.44.17710.3.44.177
5110.3.44.178/3210.3.44.178 – 10.3.44.17810.3.44.178
5210.3.44.179/3210.3.44.179 – 10.3.44.17910.3.44.179
5310.3.44.180/3210.3.44.180 – 10.3.44.18010.3.44.180
5410.3.44.181/3210.3.44.181 – 10.3.44.18110.3.44.181
5510.3.44.182/3210.3.44.182 – 10.3.44.18210.3.44.182
5610.3.44.183/3210.3.44.183 – 10.3.44.18310.3.44.183
5710.3.44.184/3210.3.44.184 – 10.3.44.18410.3.44.184
5810.3.44.185/3210.3.44.185 – 10.3.44.18510.3.44.185
5910.3.44.186/3210.3.44.186 – 10.3.44.18610.3.44.186
6010.3.44.187/3210.3.44.187 – 10.3.44.18710.3.44.187
6110.3.44.188/3210.3.44.188 – 10.3.44.18810.3.44.188
6210.3.44.189/3210.3.44.189 – 10.3.44.18910.3.44.189
6310.3.44.190/3210.3.44.190 – 10.3.44.19010.3.44.190
6410.3.44.191/3210.3.44.191 – 10.3.44.19110.3.44.191
6510.3.44.192/3210.3.44.192 – 10.3.44.19210.3.44.192
6610.3.44.193/3210.3.44.193 – 10.3.44.19310.3.44.193
6710.3.44.194/3210.3.44.194 – 10.3.44.19410.3.44.194
6810.3.44.195/3210.3.44.195 – 10.3.44.19510.3.44.195
6910.3.44.196/3210.3.44.196 – 10.3.44.19610.3.44.196
7010.3.44.197/3210.3.44.197 – 10.3.44.19710.3.44.197
7110.3.44.198/3210.3.44.198 – 10.3.44.19810.3.44.198
7210.3.44.199/3210.3.44.199 – 10.3.44.19910.3.44.199
7310.3.44.200/3210.3.44.200 – 10.3.44.20010.3.44.200
7410.3.44.201/3210.3.44.201 – 10.3.44.20110.3.44.201
7510.3.44.202/3210.3.44.202 – 10.3.44.20210.3.44.202
7610.3.44.203/3210.3.44.203 – 10.3.44.20310.3.44.203
7710.3.44.204/3210.3.44.204 – 10.3.44.20410.3.44.204
7810.3.44.205/3210.3.44.205 – 10.3.44.20510.3.44.205
7910.3.44.206/3210.3.44.206 – 10.3.44.20610.3.44.206
8010.3.44.207/3210.3.44.207 – 10.3.44.20710.3.44.207
8110.3.44.208/3210.3.44.208 – 10.3.44.20810.3.44.208
8210.3.44.209/3210.3.44.209 – 10.3.44.20910.3.44.209
8310.3.44.210/3210.3.44.210 – 10.3.44.21010.3.44.210
8410.3.44.211/3210.3.44.211 – 10.3.44.21110.3.44.211
8510.3.44.212/3210.3.44.212 – 10.3.44.21210.3.44.212
8610.3.44.213/3210.3.44.213 – 10.3.44.21310.3.44.213
8710.3.44.214/3210.3.44.214 – 10.3.44.21410.3.44.214
8810.3.44.215/3210.3.44.215 – 10.3.44.21510.3.44.215
8910.3.44.216/3210.3.44.216 – 10.3.44.21610.3.44.216
9010.3.44.217/3210.3.44.217 – 10.3.44.21710.3.44.217
9110.3.44.218/3210.3.44.218 – 10.3.44.21810.3.44.218
9210.3.44.219/3210.3.44.219 – 10.3.44.21910.3.44.219
9310.3.44.220/3210.3.44.220 – 10.3.44.22010.3.44.220
9410.3.44.221/3210.3.44.221 – 10.3.44.22110.3.44.221
9510.3.44.222/3210.3.44.222 – 10.3.44.22210.3.44.222
9610.3.44.223/3210.3.44.223 – 10.3.44.22310.3.44.223
9710.3.44.224/3210.3.44.224 – 10.3.44.22410.3.44.224
9810.3.44.225/3210.3.44.225 – 10.3.44.22510.3.44.225
9910.3.44.226/3210.3.44.226 – 10.3.44.22610.3.44.226
10010.3.44.227/3210.3.44.227 – 10.3.44.22710.3.44.227
10110.3.44.228/3210.3.44.228 – 10.3.44.22810.3.44.228
10210.3.44.229/3210.3.44.229 – 10.3.44.22910.3.44.229
10310.3.44.230/3210.3.44.230 – 10.3.44.23010.3.44.230
10410.3.44.231/3210.3.44.231 – 10.3.44.23110.3.44.231
10510.3.44.232/3210.3.44.232 – 10.3.44.23210.3.44.232
10610.3.44.233/3210.3.44.233 – 10.3.44.23310.3.44.233
10710.3.44.234/3210.3.44.234 – 10.3.44.23410.3.44.234
10810.3.44.235/3210.3.44.235 – 10.3.44.23510.3.44.235
10910.3.44.236/3210.3.44.236 – 10.3.44.23610.3.44.236
11010.3.44.237/3210.3.44.237 – 10.3.44.23710.3.44.237
11110.3.44.238/3210.3.44.238 – 10.3.44.23810.3.44.238
11210.3.44.239/3210.3.44.239 – 10.3.44.23910.3.44.239
11310.3.44.240/3210.3.44.240 – 10.3.44.24010.3.44.240
11410.3.44.241/3210.3.44.241 – 10.3.44.24110.3.44.241
11510.3.44.242/3210.3.44.242 – 10.3.44.24210.3.44.242
11610.3.44.243/3210.3.44.243 – 10.3.44.24310.3.44.243
11710.3.44.244/3210.3.44.244 – 10.3.44.24410.3.44.244
11810.3.44.245/3210.3.44.245 – 10.3.44.24510.3.44.245
11910.3.44.246/3210.3.44.246 – 10.3.44.24610.3.44.246
12010.3.44.247/3210.3.44.247 – 10.3.44.24710.3.44.247
12110.3.44.248/3210.3.44.248 – 10.3.44.24810.3.44.248
12210.3.44.249/3210.3.44.249 – 10.3.44.24910.3.44.249
12310.3.44.250/3210.3.44.250 – 10.3.44.25010.3.44.250
12410.3.44.251/3210.3.44.251 – 10.3.44.25110.3.44.251
12510.3.44.252/3210.3.44.252 – 10.3.44.25210.3.44.252
12610.3.44.253/3210.3.44.253 – 10.3.44.25310.3.44.253
12710.3.44.254/3210.3.44.254 – 10.3.44.25410.3.44.254
12810.3.44.255/3210.3.44.255 – 10.3.44.25510.3.44.255
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 →