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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)10.232.0.128/26
network10.232.0.128/26
broadcast10.232.0.191
first host10.232.0.129
last host10.232.0.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.232.0.128/26
address00001010.11101000.00000000.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.11101000.00000000.10000000
broadcast00001010.11101000.00000000.10111111
green = network part, grey = host part
hex0x0ae80080
decimal182976640
reverse dns128.0.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:80

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.232.0.128/3210.232.0.128 – 10.232.0.12810.232.0.128
210.232.0.129/3210.232.0.129 – 10.232.0.12910.232.0.129
310.232.0.130/3210.232.0.130 – 10.232.0.13010.232.0.130
410.232.0.131/3210.232.0.131 – 10.232.0.13110.232.0.131
510.232.0.132/3210.232.0.132 – 10.232.0.13210.232.0.132
610.232.0.133/3210.232.0.133 – 10.232.0.13310.232.0.133
710.232.0.134/3210.232.0.134 – 10.232.0.13410.232.0.134
810.232.0.135/3210.232.0.135 – 10.232.0.13510.232.0.135
910.232.0.136/3210.232.0.136 – 10.232.0.13610.232.0.136
1010.232.0.137/3210.232.0.137 – 10.232.0.13710.232.0.137
1110.232.0.138/3210.232.0.138 – 10.232.0.13810.232.0.138
1210.232.0.139/3210.232.0.139 – 10.232.0.13910.232.0.139
1310.232.0.140/3210.232.0.140 – 10.232.0.14010.232.0.140
1410.232.0.141/3210.232.0.141 – 10.232.0.14110.232.0.141
1510.232.0.142/3210.232.0.142 – 10.232.0.14210.232.0.142
1610.232.0.143/3210.232.0.143 – 10.232.0.14310.232.0.143
1710.232.0.144/3210.232.0.144 – 10.232.0.14410.232.0.144
1810.232.0.145/3210.232.0.145 – 10.232.0.14510.232.0.145
1910.232.0.146/3210.232.0.146 – 10.232.0.14610.232.0.146
2010.232.0.147/3210.232.0.147 – 10.232.0.14710.232.0.147
2110.232.0.148/3210.232.0.148 – 10.232.0.14810.232.0.148
2210.232.0.149/3210.232.0.149 – 10.232.0.14910.232.0.149
2310.232.0.150/3210.232.0.150 – 10.232.0.15010.232.0.150
2410.232.0.151/3210.232.0.151 – 10.232.0.15110.232.0.151
2510.232.0.152/3210.232.0.152 – 10.232.0.15210.232.0.152
2610.232.0.153/3210.232.0.153 – 10.232.0.15310.232.0.153
2710.232.0.154/3210.232.0.154 – 10.232.0.15410.232.0.154
2810.232.0.155/3210.232.0.155 – 10.232.0.15510.232.0.155
2910.232.0.156/3210.232.0.156 – 10.232.0.15610.232.0.156
3010.232.0.157/3210.232.0.157 – 10.232.0.15710.232.0.157
3110.232.0.158/3210.232.0.158 – 10.232.0.15810.232.0.158
3210.232.0.159/3210.232.0.159 – 10.232.0.15910.232.0.159
3310.232.0.160/3210.232.0.160 – 10.232.0.16010.232.0.160
3410.232.0.161/3210.232.0.161 – 10.232.0.16110.232.0.161
3510.232.0.162/3210.232.0.162 – 10.232.0.16210.232.0.162
3610.232.0.163/3210.232.0.163 – 10.232.0.16310.232.0.163
3710.232.0.164/3210.232.0.164 – 10.232.0.16410.232.0.164
3810.232.0.165/3210.232.0.165 – 10.232.0.16510.232.0.165
3910.232.0.166/3210.232.0.166 – 10.232.0.16610.232.0.166
4010.232.0.167/3210.232.0.167 – 10.232.0.16710.232.0.167
4110.232.0.168/3210.232.0.168 – 10.232.0.16810.232.0.168
4210.232.0.169/3210.232.0.169 – 10.232.0.16910.232.0.169
4310.232.0.170/3210.232.0.170 – 10.232.0.17010.232.0.170
4410.232.0.171/3210.232.0.171 – 10.232.0.17110.232.0.171
4510.232.0.172/3210.232.0.172 – 10.232.0.17210.232.0.172
4610.232.0.173/3210.232.0.173 – 10.232.0.17310.232.0.173
4710.232.0.174/3210.232.0.174 – 10.232.0.17410.232.0.174
4810.232.0.175/3210.232.0.175 – 10.232.0.17510.232.0.175
4910.232.0.176/3210.232.0.176 – 10.232.0.17610.232.0.176
5010.232.0.177/3210.232.0.177 – 10.232.0.17710.232.0.177
5110.232.0.178/3210.232.0.178 – 10.232.0.17810.232.0.178
5210.232.0.179/3210.232.0.179 – 10.232.0.17910.232.0.179
5310.232.0.180/3210.232.0.180 – 10.232.0.18010.232.0.180
5410.232.0.181/3210.232.0.181 – 10.232.0.18110.232.0.181
5510.232.0.182/3210.232.0.182 – 10.232.0.18210.232.0.182
5610.232.0.183/3210.232.0.183 – 10.232.0.18310.232.0.183
5710.232.0.184/3210.232.0.184 – 10.232.0.18410.232.0.184
5810.232.0.185/3210.232.0.185 – 10.232.0.18510.232.0.185
5910.232.0.186/3210.232.0.186 – 10.232.0.18610.232.0.186
6010.232.0.187/3210.232.0.187 – 10.232.0.18710.232.0.187
6110.232.0.188/3210.232.0.188 – 10.232.0.18810.232.0.188
6210.232.0.189/3210.232.0.189 – 10.232.0.18910.232.0.189
6310.232.0.190/3210.232.0.190 – 10.232.0.19010.232.0.190
6410.232.0.191/3210.232.0.191 – 10.232.0.19110.232.0.191
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 →