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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)10.167.64.128/26
network10.167.64.128/26
broadcast10.167.64.191
first host10.167.64.129
last host10.167.64.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.167.64.128/26
address00001010.10100111.01000000.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.10100111.01000000.10000000
broadcast00001010.10100111.01000000.10111111
green = network part, grey = host part
hex0x0aa74080
decimal178733184
reverse dns128.64.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:4080

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.64.128/3210.167.64.128 – 10.167.64.12810.167.64.128
210.167.64.129/3210.167.64.129 – 10.167.64.12910.167.64.129
310.167.64.130/3210.167.64.130 – 10.167.64.13010.167.64.130
410.167.64.131/3210.167.64.131 – 10.167.64.13110.167.64.131
510.167.64.132/3210.167.64.132 – 10.167.64.13210.167.64.132
610.167.64.133/3210.167.64.133 – 10.167.64.13310.167.64.133
710.167.64.134/3210.167.64.134 – 10.167.64.13410.167.64.134
810.167.64.135/3210.167.64.135 – 10.167.64.13510.167.64.135
910.167.64.136/3210.167.64.136 – 10.167.64.13610.167.64.136
1010.167.64.137/3210.167.64.137 – 10.167.64.13710.167.64.137
1110.167.64.138/3210.167.64.138 – 10.167.64.13810.167.64.138
1210.167.64.139/3210.167.64.139 – 10.167.64.13910.167.64.139
1310.167.64.140/3210.167.64.140 – 10.167.64.14010.167.64.140
1410.167.64.141/3210.167.64.141 – 10.167.64.14110.167.64.141
1510.167.64.142/3210.167.64.142 – 10.167.64.14210.167.64.142
1610.167.64.143/3210.167.64.143 – 10.167.64.14310.167.64.143
1710.167.64.144/3210.167.64.144 – 10.167.64.14410.167.64.144
1810.167.64.145/3210.167.64.145 – 10.167.64.14510.167.64.145
1910.167.64.146/3210.167.64.146 – 10.167.64.14610.167.64.146
2010.167.64.147/3210.167.64.147 – 10.167.64.14710.167.64.147
2110.167.64.148/3210.167.64.148 – 10.167.64.14810.167.64.148
2210.167.64.149/3210.167.64.149 – 10.167.64.14910.167.64.149
2310.167.64.150/3210.167.64.150 – 10.167.64.15010.167.64.150
2410.167.64.151/3210.167.64.151 – 10.167.64.15110.167.64.151
2510.167.64.152/3210.167.64.152 – 10.167.64.15210.167.64.152
2610.167.64.153/3210.167.64.153 – 10.167.64.15310.167.64.153
2710.167.64.154/3210.167.64.154 – 10.167.64.15410.167.64.154
2810.167.64.155/3210.167.64.155 – 10.167.64.15510.167.64.155
2910.167.64.156/3210.167.64.156 – 10.167.64.15610.167.64.156
3010.167.64.157/3210.167.64.157 – 10.167.64.15710.167.64.157
3110.167.64.158/3210.167.64.158 – 10.167.64.15810.167.64.158
3210.167.64.159/3210.167.64.159 – 10.167.64.15910.167.64.159
3310.167.64.160/3210.167.64.160 – 10.167.64.16010.167.64.160
3410.167.64.161/3210.167.64.161 – 10.167.64.16110.167.64.161
3510.167.64.162/3210.167.64.162 – 10.167.64.16210.167.64.162
3610.167.64.163/3210.167.64.163 – 10.167.64.16310.167.64.163
3710.167.64.164/3210.167.64.164 – 10.167.64.16410.167.64.164
3810.167.64.165/3210.167.64.165 – 10.167.64.16510.167.64.165
3910.167.64.166/3210.167.64.166 – 10.167.64.16610.167.64.166
4010.167.64.167/3210.167.64.167 – 10.167.64.16710.167.64.167
4110.167.64.168/3210.167.64.168 – 10.167.64.16810.167.64.168
4210.167.64.169/3210.167.64.169 – 10.167.64.16910.167.64.169
4310.167.64.170/3210.167.64.170 – 10.167.64.17010.167.64.170
4410.167.64.171/3210.167.64.171 – 10.167.64.17110.167.64.171
4510.167.64.172/3210.167.64.172 – 10.167.64.17210.167.64.172
4610.167.64.173/3210.167.64.173 – 10.167.64.17310.167.64.173
4710.167.64.174/3210.167.64.174 – 10.167.64.17410.167.64.174
4810.167.64.175/3210.167.64.175 – 10.167.64.17510.167.64.175
4910.167.64.176/3210.167.64.176 – 10.167.64.17610.167.64.176
5010.167.64.177/3210.167.64.177 – 10.167.64.17710.167.64.177
5110.167.64.178/3210.167.64.178 – 10.167.64.17810.167.64.178
5210.167.64.179/3210.167.64.179 – 10.167.64.17910.167.64.179
5310.167.64.180/3210.167.64.180 – 10.167.64.18010.167.64.180
5410.167.64.181/3210.167.64.181 – 10.167.64.18110.167.64.181
5510.167.64.182/3210.167.64.182 – 10.167.64.18210.167.64.182
5610.167.64.183/3210.167.64.183 – 10.167.64.18310.167.64.183
5710.167.64.184/3210.167.64.184 – 10.167.64.18410.167.64.184
5810.167.64.185/3210.167.64.185 – 10.167.64.18510.167.64.185
5910.167.64.186/3210.167.64.186 – 10.167.64.18610.167.64.186
6010.167.64.187/3210.167.64.187 – 10.167.64.18710.167.64.187
6110.167.64.188/3210.167.64.188 – 10.167.64.18810.167.64.188
6210.167.64.189/3210.167.64.189 – 10.167.64.18910.167.64.189
6310.167.64.190/3210.167.64.190 – 10.167.64.19010.167.64.190
6410.167.64.191/3210.167.64.191 – 10.167.64.19110.167.64.191
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 →