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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)10.212.167.128/26
network10.212.167.128/26
broadcast10.212.167.191
first host10.212.167.129
last host10.212.167.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.212.167.128/26
address00001010.11010100.10100111.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.11010100.10100111.10000000
broadcast00001010.11010100.10100111.10111111
green = network part, grey = host part
hex0x0ad4a780
decimal181708672
reverse dns128.167.212.10.in-addr.arpa
ipv4-mapped::ffff:ad4:a780

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.212.167.128/3210.212.167.128 – 10.212.167.12810.212.167.128
210.212.167.129/3210.212.167.129 – 10.212.167.12910.212.167.129
310.212.167.130/3210.212.167.130 – 10.212.167.13010.212.167.130
410.212.167.131/3210.212.167.131 – 10.212.167.13110.212.167.131
510.212.167.132/3210.212.167.132 – 10.212.167.13210.212.167.132
610.212.167.133/3210.212.167.133 – 10.212.167.13310.212.167.133
710.212.167.134/3210.212.167.134 – 10.212.167.13410.212.167.134
810.212.167.135/3210.212.167.135 – 10.212.167.13510.212.167.135
910.212.167.136/3210.212.167.136 – 10.212.167.13610.212.167.136
1010.212.167.137/3210.212.167.137 – 10.212.167.13710.212.167.137
1110.212.167.138/3210.212.167.138 – 10.212.167.13810.212.167.138
1210.212.167.139/3210.212.167.139 – 10.212.167.13910.212.167.139
1310.212.167.140/3210.212.167.140 – 10.212.167.14010.212.167.140
1410.212.167.141/3210.212.167.141 – 10.212.167.14110.212.167.141
1510.212.167.142/3210.212.167.142 – 10.212.167.14210.212.167.142
1610.212.167.143/3210.212.167.143 – 10.212.167.14310.212.167.143
1710.212.167.144/3210.212.167.144 – 10.212.167.14410.212.167.144
1810.212.167.145/3210.212.167.145 – 10.212.167.14510.212.167.145
1910.212.167.146/3210.212.167.146 – 10.212.167.14610.212.167.146
2010.212.167.147/3210.212.167.147 – 10.212.167.14710.212.167.147
2110.212.167.148/3210.212.167.148 – 10.212.167.14810.212.167.148
2210.212.167.149/3210.212.167.149 – 10.212.167.14910.212.167.149
2310.212.167.150/3210.212.167.150 – 10.212.167.15010.212.167.150
2410.212.167.151/3210.212.167.151 – 10.212.167.15110.212.167.151
2510.212.167.152/3210.212.167.152 – 10.212.167.15210.212.167.152
2610.212.167.153/3210.212.167.153 – 10.212.167.15310.212.167.153
2710.212.167.154/3210.212.167.154 – 10.212.167.15410.212.167.154
2810.212.167.155/3210.212.167.155 – 10.212.167.15510.212.167.155
2910.212.167.156/3210.212.167.156 – 10.212.167.15610.212.167.156
3010.212.167.157/3210.212.167.157 – 10.212.167.15710.212.167.157
3110.212.167.158/3210.212.167.158 – 10.212.167.15810.212.167.158
3210.212.167.159/3210.212.167.159 – 10.212.167.15910.212.167.159
3310.212.167.160/3210.212.167.160 – 10.212.167.16010.212.167.160
3410.212.167.161/3210.212.167.161 – 10.212.167.16110.212.167.161
3510.212.167.162/3210.212.167.162 – 10.212.167.16210.212.167.162
3610.212.167.163/3210.212.167.163 – 10.212.167.16310.212.167.163
3710.212.167.164/3210.212.167.164 – 10.212.167.16410.212.167.164
3810.212.167.165/3210.212.167.165 – 10.212.167.16510.212.167.165
3910.212.167.166/3210.212.167.166 – 10.212.167.16610.212.167.166
4010.212.167.167/3210.212.167.167 – 10.212.167.16710.212.167.167
4110.212.167.168/3210.212.167.168 – 10.212.167.16810.212.167.168
4210.212.167.169/3210.212.167.169 – 10.212.167.16910.212.167.169
4310.212.167.170/3210.212.167.170 – 10.212.167.17010.212.167.170
4410.212.167.171/3210.212.167.171 – 10.212.167.17110.212.167.171
4510.212.167.172/3210.212.167.172 – 10.212.167.17210.212.167.172
4610.212.167.173/3210.212.167.173 – 10.212.167.17310.212.167.173
4710.212.167.174/3210.212.167.174 – 10.212.167.17410.212.167.174
4810.212.167.175/3210.212.167.175 – 10.212.167.17510.212.167.175
4910.212.167.176/3210.212.167.176 – 10.212.167.17610.212.167.176
5010.212.167.177/3210.212.167.177 – 10.212.167.17710.212.167.177
5110.212.167.178/3210.212.167.178 – 10.212.167.17810.212.167.178
5210.212.167.179/3210.212.167.179 – 10.212.167.17910.212.167.179
5310.212.167.180/3210.212.167.180 – 10.212.167.18010.212.167.180
5410.212.167.181/3210.212.167.181 – 10.212.167.18110.212.167.181
5510.212.167.182/3210.212.167.182 – 10.212.167.18210.212.167.182
5610.212.167.183/3210.212.167.183 – 10.212.167.18310.212.167.183
5710.212.167.184/3210.212.167.184 – 10.212.167.18410.212.167.184
5810.212.167.185/3210.212.167.185 – 10.212.167.18510.212.167.185
5910.212.167.186/3210.212.167.186 – 10.212.167.18610.212.167.186
6010.212.167.187/3210.212.167.187 – 10.212.167.18710.212.167.187
6110.212.167.188/3210.212.167.188 – 10.212.167.18810.212.167.188
6210.212.167.189/3210.212.167.189 – 10.212.167.18910.212.167.189
6310.212.167.190/3210.212.167.190 – 10.212.167.19010.212.167.190
6410.212.167.191/3210.212.167.191 – 10.212.167.19110.212.167.191
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 →