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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)10.78.77.128/26
network10.78.77.128/26
broadcast10.78.77.191
first host10.78.77.129
last host10.78.77.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.77.128/26
address00001010.01001110.01001101.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.01001101.10000000
broadcast00001010.01001110.01001101.10111111
green = network part, grey = host part
hex0x0a4e4d80
decimal172903808
reverse dns128.77.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4d80

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.77.128/3210.78.77.128 – 10.78.77.12810.78.77.128
210.78.77.129/3210.78.77.129 – 10.78.77.12910.78.77.129
310.78.77.130/3210.78.77.130 – 10.78.77.13010.78.77.130
410.78.77.131/3210.78.77.131 – 10.78.77.13110.78.77.131
510.78.77.132/3210.78.77.132 – 10.78.77.13210.78.77.132
610.78.77.133/3210.78.77.133 – 10.78.77.13310.78.77.133
710.78.77.134/3210.78.77.134 – 10.78.77.13410.78.77.134
810.78.77.135/3210.78.77.135 – 10.78.77.13510.78.77.135
910.78.77.136/3210.78.77.136 – 10.78.77.13610.78.77.136
1010.78.77.137/3210.78.77.137 – 10.78.77.13710.78.77.137
1110.78.77.138/3210.78.77.138 – 10.78.77.13810.78.77.138
1210.78.77.139/3210.78.77.139 – 10.78.77.13910.78.77.139
1310.78.77.140/3210.78.77.140 – 10.78.77.14010.78.77.140
1410.78.77.141/3210.78.77.141 – 10.78.77.14110.78.77.141
1510.78.77.142/3210.78.77.142 – 10.78.77.14210.78.77.142
1610.78.77.143/3210.78.77.143 – 10.78.77.14310.78.77.143
1710.78.77.144/3210.78.77.144 – 10.78.77.14410.78.77.144
1810.78.77.145/3210.78.77.145 – 10.78.77.14510.78.77.145
1910.78.77.146/3210.78.77.146 – 10.78.77.14610.78.77.146
2010.78.77.147/3210.78.77.147 – 10.78.77.14710.78.77.147
2110.78.77.148/3210.78.77.148 – 10.78.77.14810.78.77.148
2210.78.77.149/3210.78.77.149 – 10.78.77.14910.78.77.149
2310.78.77.150/3210.78.77.150 – 10.78.77.15010.78.77.150
2410.78.77.151/3210.78.77.151 – 10.78.77.15110.78.77.151
2510.78.77.152/3210.78.77.152 – 10.78.77.15210.78.77.152
2610.78.77.153/3210.78.77.153 – 10.78.77.15310.78.77.153
2710.78.77.154/3210.78.77.154 – 10.78.77.15410.78.77.154
2810.78.77.155/3210.78.77.155 – 10.78.77.15510.78.77.155
2910.78.77.156/3210.78.77.156 – 10.78.77.15610.78.77.156
3010.78.77.157/3210.78.77.157 – 10.78.77.15710.78.77.157
3110.78.77.158/3210.78.77.158 – 10.78.77.15810.78.77.158
3210.78.77.159/3210.78.77.159 – 10.78.77.15910.78.77.159
3310.78.77.160/3210.78.77.160 – 10.78.77.16010.78.77.160
3410.78.77.161/3210.78.77.161 – 10.78.77.16110.78.77.161
3510.78.77.162/3210.78.77.162 – 10.78.77.16210.78.77.162
3610.78.77.163/3210.78.77.163 – 10.78.77.16310.78.77.163
3710.78.77.164/3210.78.77.164 – 10.78.77.16410.78.77.164
3810.78.77.165/3210.78.77.165 – 10.78.77.16510.78.77.165
3910.78.77.166/3210.78.77.166 – 10.78.77.16610.78.77.166
4010.78.77.167/3210.78.77.167 – 10.78.77.16710.78.77.167
4110.78.77.168/3210.78.77.168 – 10.78.77.16810.78.77.168
4210.78.77.169/3210.78.77.169 – 10.78.77.16910.78.77.169
4310.78.77.170/3210.78.77.170 – 10.78.77.17010.78.77.170
4410.78.77.171/3210.78.77.171 – 10.78.77.17110.78.77.171
4510.78.77.172/3210.78.77.172 – 10.78.77.17210.78.77.172
4610.78.77.173/3210.78.77.173 – 10.78.77.17310.78.77.173
4710.78.77.174/3210.78.77.174 – 10.78.77.17410.78.77.174
4810.78.77.175/3210.78.77.175 – 10.78.77.17510.78.77.175
4910.78.77.176/3210.78.77.176 – 10.78.77.17610.78.77.176
5010.78.77.177/3210.78.77.177 – 10.78.77.17710.78.77.177
5110.78.77.178/3210.78.77.178 – 10.78.77.17810.78.77.178
5210.78.77.179/3210.78.77.179 – 10.78.77.17910.78.77.179
5310.78.77.180/3210.78.77.180 – 10.78.77.18010.78.77.180
5410.78.77.181/3210.78.77.181 – 10.78.77.18110.78.77.181
5510.78.77.182/3210.78.77.182 – 10.78.77.18210.78.77.182
5610.78.77.183/3210.78.77.183 – 10.78.77.18310.78.77.183
5710.78.77.184/3210.78.77.184 – 10.78.77.18410.78.77.184
5810.78.77.185/3210.78.77.185 – 10.78.77.18510.78.77.185
5910.78.77.186/3210.78.77.186 – 10.78.77.18610.78.77.186
6010.78.77.187/3210.78.77.187 – 10.78.77.18710.78.77.187
6110.78.77.188/3210.78.77.188 – 10.78.77.18810.78.77.188
6210.78.77.189/3210.78.77.189 – 10.78.77.18910.78.77.189
6310.78.77.190/3210.78.77.190 – 10.78.77.19010.78.77.190
6410.78.77.191/3210.78.77.191 – 10.78.77.19110.78.77.191
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 →