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)10.232.4.128/26
network10.232.4.128/26
broadcast10.232.4.191
first host10.232.4.129
last host10.232.4.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.232.4.128/26
address00001010.11101000.00000100.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.11101000.00000100.10000000
broadcast00001010.11101000.00000100.10111111
green = network part, grey = host part
hex0x0ae80480
decimal182977664
reverse dns128.4.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:480

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.232.4.128/3210.232.4.128 – 10.232.4.12810.232.4.128
210.232.4.129/3210.232.4.129 – 10.232.4.12910.232.4.129
310.232.4.130/3210.232.4.130 – 10.232.4.13010.232.4.130
410.232.4.131/3210.232.4.131 – 10.232.4.13110.232.4.131
510.232.4.132/3210.232.4.132 – 10.232.4.13210.232.4.132
610.232.4.133/3210.232.4.133 – 10.232.4.13310.232.4.133
710.232.4.134/3210.232.4.134 – 10.232.4.13410.232.4.134
810.232.4.135/3210.232.4.135 – 10.232.4.13510.232.4.135
910.232.4.136/3210.232.4.136 – 10.232.4.13610.232.4.136
1010.232.4.137/3210.232.4.137 – 10.232.4.13710.232.4.137
1110.232.4.138/3210.232.4.138 – 10.232.4.13810.232.4.138
1210.232.4.139/3210.232.4.139 – 10.232.4.13910.232.4.139
1310.232.4.140/3210.232.4.140 – 10.232.4.14010.232.4.140
1410.232.4.141/3210.232.4.141 – 10.232.4.14110.232.4.141
1510.232.4.142/3210.232.4.142 – 10.232.4.14210.232.4.142
1610.232.4.143/3210.232.4.143 – 10.232.4.14310.232.4.143
1710.232.4.144/3210.232.4.144 – 10.232.4.14410.232.4.144
1810.232.4.145/3210.232.4.145 – 10.232.4.14510.232.4.145
1910.232.4.146/3210.232.4.146 – 10.232.4.14610.232.4.146
2010.232.4.147/3210.232.4.147 – 10.232.4.14710.232.4.147
2110.232.4.148/3210.232.4.148 – 10.232.4.14810.232.4.148
2210.232.4.149/3210.232.4.149 – 10.232.4.14910.232.4.149
2310.232.4.150/3210.232.4.150 – 10.232.4.15010.232.4.150
2410.232.4.151/3210.232.4.151 – 10.232.4.15110.232.4.151
2510.232.4.152/3210.232.4.152 – 10.232.4.15210.232.4.152
2610.232.4.153/3210.232.4.153 – 10.232.4.15310.232.4.153
2710.232.4.154/3210.232.4.154 – 10.232.4.15410.232.4.154
2810.232.4.155/3210.232.4.155 – 10.232.4.15510.232.4.155
2910.232.4.156/3210.232.4.156 – 10.232.4.15610.232.4.156
3010.232.4.157/3210.232.4.157 – 10.232.4.15710.232.4.157
3110.232.4.158/3210.232.4.158 – 10.232.4.15810.232.4.158
3210.232.4.159/3210.232.4.159 – 10.232.4.15910.232.4.159
3310.232.4.160/3210.232.4.160 – 10.232.4.16010.232.4.160
3410.232.4.161/3210.232.4.161 – 10.232.4.16110.232.4.161
3510.232.4.162/3210.232.4.162 – 10.232.4.16210.232.4.162
3610.232.4.163/3210.232.4.163 – 10.232.4.16310.232.4.163
3710.232.4.164/3210.232.4.164 – 10.232.4.16410.232.4.164
3810.232.4.165/3210.232.4.165 – 10.232.4.16510.232.4.165
3910.232.4.166/3210.232.4.166 – 10.232.4.16610.232.4.166
4010.232.4.167/3210.232.4.167 – 10.232.4.16710.232.4.167
4110.232.4.168/3210.232.4.168 – 10.232.4.16810.232.4.168
4210.232.4.169/3210.232.4.169 – 10.232.4.16910.232.4.169
4310.232.4.170/3210.232.4.170 – 10.232.4.17010.232.4.170
4410.232.4.171/3210.232.4.171 – 10.232.4.17110.232.4.171
4510.232.4.172/3210.232.4.172 – 10.232.4.17210.232.4.172
4610.232.4.173/3210.232.4.173 – 10.232.4.17310.232.4.173
4710.232.4.174/3210.232.4.174 – 10.232.4.17410.232.4.174
4810.232.4.175/3210.232.4.175 – 10.232.4.17510.232.4.175
4910.232.4.176/3210.232.4.176 – 10.232.4.17610.232.4.176
5010.232.4.177/3210.232.4.177 – 10.232.4.17710.232.4.177
5110.232.4.178/3210.232.4.178 – 10.232.4.17810.232.4.178
5210.232.4.179/3210.232.4.179 – 10.232.4.17910.232.4.179
5310.232.4.180/3210.232.4.180 – 10.232.4.18010.232.4.180
5410.232.4.181/3210.232.4.181 – 10.232.4.18110.232.4.181
5510.232.4.182/3210.232.4.182 – 10.232.4.18210.232.4.182
5610.232.4.183/3210.232.4.183 – 10.232.4.18310.232.4.183
5710.232.4.184/3210.232.4.184 – 10.232.4.18410.232.4.184
5810.232.4.185/3210.232.4.185 – 10.232.4.18510.232.4.185
5910.232.4.186/3210.232.4.186 – 10.232.4.18610.232.4.186
6010.232.4.187/3210.232.4.187 – 10.232.4.18710.232.4.187
6110.232.4.188/3210.232.4.188 – 10.232.4.18810.232.4.188
6210.232.4.189/3210.232.4.189 – 10.232.4.18910.232.4.189
6310.232.4.190/3210.232.4.190 – 10.232.4.19010.232.4.190
6410.232.4.191/3210.232.4.191 – 10.232.4.19110.232.4.191
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /26
/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-
/25255.255.255.128128126-
/26255.255.255.19264621
/27255.255.255.22432302 split →
/28255.255.255.24016144 split →
/29255.255.255.248868 split →
/30255.255.255.2524216 split →
/31255.255.255.2542232 split →
/32255.255.255.2551164 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 →