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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)10.20.167.128/26
network10.20.167.128/26
broadcast10.20.167.191
first host10.20.167.129
last host10.20.167.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.20.167.128/26
address00001010.00010100.10100111.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00010100.10100111.10000000
broadcast00001010.00010100.10100111.10111111
green = network part, grey = host part
hex0x0a14a780
decimal169125760
reverse dns128.167.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:a780

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.20.167.128/3210.20.167.128 – 10.20.167.12810.20.167.128
210.20.167.129/3210.20.167.129 – 10.20.167.12910.20.167.129
310.20.167.130/3210.20.167.130 – 10.20.167.13010.20.167.130
410.20.167.131/3210.20.167.131 – 10.20.167.13110.20.167.131
510.20.167.132/3210.20.167.132 – 10.20.167.13210.20.167.132
610.20.167.133/3210.20.167.133 – 10.20.167.13310.20.167.133
710.20.167.134/3210.20.167.134 – 10.20.167.13410.20.167.134
810.20.167.135/3210.20.167.135 – 10.20.167.13510.20.167.135
910.20.167.136/3210.20.167.136 – 10.20.167.13610.20.167.136
1010.20.167.137/3210.20.167.137 – 10.20.167.13710.20.167.137
1110.20.167.138/3210.20.167.138 – 10.20.167.13810.20.167.138
1210.20.167.139/3210.20.167.139 – 10.20.167.13910.20.167.139
1310.20.167.140/3210.20.167.140 – 10.20.167.14010.20.167.140
1410.20.167.141/3210.20.167.141 – 10.20.167.14110.20.167.141
1510.20.167.142/3210.20.167.142 – 10.20.167.14210.20.167.142
1610.20.167.143/3210.20.167.143 – 10.20.167.14310.20.167.143
1710.20.167.144/3210.20.167.144 – 10.20.167.14410.20.167.144
1810.20.167.145/3210.20.167.145 – 10.20.167.14510.20.167.145
1910.20.167.146/3210.20.167.146 – 10.20.167.14610.20.167.146
2010.20.167.147/3210.20.167.147 – 10.20.167.14710.20.167.147
2110.20.167.148/3210.20.167.148 – 10.20.167.14810.20.167.148
2210.20.167.149/3210.20.167.149 – 10.20.167.14910.20.167.149
2310.20.167.150/3210.20.167.150 – 10.20.167.15010.20.167.150
2410.20.167.151/3210.20.167.151 – 10.20.167.15110.20.167.151
2510.20.167.152/3210.20.167.152 – 10.20.167.15210.20.167.152
2610.20.167.153/3210.20.167.153 – 10.20.167.15310.20.167.153
2710.20.167.154/3210.20.167.154 – 10.20.167.15410.20.167.154
2810.20.167.155/3210.20.167.155 – 10.20.167.15510.20.167.155
2910.20.167.156/3210.20.167.156 – 10.20.167.15610.20.167.156
3010.20.167.157/3210.20.167.157 – 10.20.167.15710.20.167.157
3110.20.167.158/3210.20.167.158 – 10.20.167.15810.20.167.158
3210.20.167.159/3210.20.167.159 – 10.20.167.15910.20.167.159
3310.20.167.160/3210.20.167.160 – 10.20.167.16010.20.167.160
3410.20.167.161/3210.20.167.161 – 10.20.167.16110.20.167.161
3510.20.167.162/3210.20.167.162 – 10.20.167.16210.20.167.162
3610.20.167.163/3210.20.167.163 – 10.20.167.16310.20.167.163
3710.20.167.164/3210.20.167.164 – 10.20.167.16410.20.167.164
3810.20.167.165/3210.20.167.165 – 10.20.167.16510.20.167.165
3910.20.167.166/3210.20.167.166 – 10.20.167.16610.20.167.166
4010.20.167.167/3210.20.167.167 – 10.20.167.16710.20.167.167
4110.20.167.168/3210.20.167.168 – 10.20.167.16810.20.167.168
4210.20.167.169/3210.20.167.169 – 10.20.167.16910.20.167.169
4310.20.167.170/3210.20.167.170 – 10.20.167.17010.20.167.170
4410.20.167.171/3210.20.167.171 – 10.20.167.17110.20.167.171
4510.20.167.172/3210.20.167.172 – 10.20.167.17210.20.167.172
4610.20.167.173/3210.20.167.173 – 10.20.167.17310.20.167.173
4710.20.167.174/3210.20.167.174 – 10.20.167.17410.20.167.174
4810.20.167.175/3210.20.167.175 – 10.20.167.17510.20.167.175
4910.20.167.176/3210.20.167.176 – 10.20.167.17610.20.167.176
5010.20.167.177/3210.20.167.177 – 10.20.167.17710.20.167.177
5110.20.167.178/3210.20.167.178 – 10.20.167.17810.20.167.178
5210.20.167.179/3210.20.167.179 – 10.20.167.17910.20.167.179
5310.20.167.180/3210.20.167.180 – 10.20.167.18010.20.167.180
5410.20.167.181/3210.20.167.181 – 10.20.167.18110.20.167.181
5510.20.167.182/3210.20.167.182 – 10.20.167.18210.20.167.182
5610.20.167.183/3210.20.167.183 – 10.20.167.18310.20.167.183
5710.20.167.184/3210.20.167.184 – 10.20.167.18410.20.167.184
5810.20.167.185/3210.20.167.185 – 10.20.167.18510.20.167.185
5910.20.167.186/3210.20.167.186 – 10.20.167.18610.20.167.186
6010.20.167.187/3210.20.167.187 – 10.20.167.18710.20.167.187
6110.20.167.188/3210.20.167.188 – 10.20.167.18810.20.167.188
6210.20.167.189/3210.20.167.189 – 10.20.167.18910.20.167.189
6310.20.167.190/3210.20.167.190 – 10.20.167.19010.20.167.190
6410.20.167.191/3210.20.167.191 – 10.20.167.19110.20.167.191
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 →