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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)10.78.83.128/26
network10.78.83.128/26
broadcast10.78.83.191
first host10.78.83.129
last host10.78.83.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.83.128/26
address00001010.01001110.01010011.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.01010011.10000000
broadcast00001010.01001110.01010011.10111111
green = network part, grey = host part
hex0x0a4e5380
decimal172905344
reverse dns128.83.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5380

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.83.128/3210.78.83.128 – 10.78.83.12810.78.83.128
210.78.83.129/3210.78.83.129 – 10.78.83.12910.78.83.129
310.78.83.130/3210.78.83.130 – 10.78.83.13010.78.83.130
410.78.83.131/3210.78.83.131 – 10.78.83.13110.78.83.131
510.78.83.132/3210.78.83.132 – 10.78.83.13210.78.83.132
610.78.83.133/3210.78.83.133 – 10.78.83.13310.78.83.133
710.78.83.134/3210.78.83.134 – 10.78.83.13410.78.83.134
810.78.83.135/3210.78.83.135 – 10.78.83.13510.78.83.135
910.78.83.136/3210.78.83.136 – 10.78.83.13610.78.83.136
1010.78.83.137/3210.78.83.137 – 10.78.83.13710.78.83.137
1110.78.83.138/3210.78.83.138 – 10.78.83.13810.78.83.138
1210.78.83.139/3210.78.83.139 – 10.78.83.13910.78.83.139
1310.78.83.140/3210.78.83.140 – 10.78.83.14010.78.83.140
1410.78.83.141/3210.78.83.141 – 10.78.83.14110.78.83.141
1510.78.83.142/3210.78.83.142 – 10.78.83.14210.78.83.142
1610.78.83.143/3210.78.83.143 – 10.78.83.14310.78.83.143
1710.78.83.144/3210.78.83.144 – 10.78.83.14410.78.83.144
1810.78.83.145/3210.78.83.145 – 10.78.83.14510.78.83.145
1910.78.83.146/3210.78.83.146 – 10.78.83.14610.78.83.146
2010.78.83.147/3210.78.83.147 – 10.78.83.14710.78.83.147
2110.78.83.148/3210.78.83.148 – 10.78.83.14810.78.83.148
2210.78.83.149/3210.78.83.149 – 10.78.83.14910.78.83.149
2310.78.83.150/3210.78.83.150 – 10.78.83.15010.78.83.150
2410.78.83.151/3210.78.83.151 – 10.78.83.15110.78.83.151
2510.78.83.152/3210.78.83.152 – 10.78.83.15210.78.83.152
2610.78.83.153/3210.78.83.153 – 10.78.83.15310.78.83.153
2710.78.83.154/3210.78.83.154 – 10.78.83.15410.78.83.154
2810.78.83.155/3210.78.83.155 – 10.78.83.15510.78.83.155
2910.78.83.156/3210.78.83.156 – 10.78.83.15610.78.83.156
3010.78.83.157/3210.78.83.157 – 10.78.83.15710.78.83.157
3110.78.83.158/3210.78.83.158 – 10.78.83.15810.78.83.158
3210.78.83.159/3210.78.83.159 – 10.78.83.15910.78.83.159
3310.78.83.160/3210.78.83.160 – 10.78.83.16010.78.83.160
3410.78.83.161/3210.78.83.161 – 10.78.83.16110.78.83.161
3510.78.83.162/3210.78.83.162 – 10.78.83.16210.78.83.162
3610.78.83.163/3210.78.83.163 – 10.78.83.16310.78.83.163
3710.78.83.164/3210.78.83.164 – 10.78.83.16410.78.83.164
3810.78.83.165/3210.78.83.165 – 10.78.83.16510.78.83.165
3910.78.83.166/3210.78.83.166 – 10.78.83.16610.78.83.166
4010.78.83.167/3210.78.83.167 – 10.78.83.16710.78.83.167
4110.78.83.168/3210.78.83.168 – 10.78.83.16810.78.83.168
4210.78.83.169/3210.78.83.169 – 10.78.83.16910.78.83.169
4310.78.83.170/3210.78.83.170 – 10.78.83.17010.78.83.170
4410.78.83.171/3210.78.83.171 – 10.78.83.17110.78.83.171
4510.78.83.172/3210.78.83.172 – 10.78.83.17210.78.83.172
4610.78.83.173/3210.78.83.173 – 10.78.83.17310.78.83.173
4710.78.83.174/3210.78.83.174 – 10.78.83.17410.78.83.174
4810.78.83.175/3210.78.83.175 – 10.78.83.17510.78.83.175
4910.78.83.176/3210.78.83.176 – 10.78.83.17610.78.83.176
5010.78.83.177/3210.78.83.177 – 10.78.83.17710.78.83.177
5110.78.83.178/3210.78.83.178 – 10.78.83.17810.78.83.178
5210.78.83.179/3210.78.83.179 – 10.78.83.17910.78.83.179
5310.78.83.180/3210.78.83.180 – 10.78.83.18010.78.83.180
5410.78.83.181/3210.78.83.181 – 10.78.83.18110.78.83.181
5510.78.83.182/3210.78.83.182 – 10.78.83.18210.78.83.182
5610.78.83.183/3210.78.83.183 – 10.78.83.18310.78.83.183
5710.78.83.184/3210.78.83.184 – 10.78.83.18410.78.83.184
5810.78.83.185/3210.78.83.185 – 10.78.83.18510.78.83.185
5910.78.83.186/3210.78.83.186 – 10.78.83.18610.78.83.186
6010.78.83.187/3210.78.83.187 – 10.78.83.18710.78.83.187
6110.78.83.188/3210.78.83.188 – 10.78.83.18810.78.83.188
6210.78.83.189/3210.78.83.189 – 10.78.83.18910.78.83.189
6310.78.83.190/3210.78.83.190 – 10.78.83.19010.78.83.190
6410.78.83.191/3210.78.83.191 – 10.78.83.19110.78.83.191
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 →