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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)10.78.35.128/26
network10.78.35.128/26
broadcast10.78.35.191
first host10.78.35.129
last host10.78.35.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.35.128/26
address00001010.01001110.00100011.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.00100011.10000000
broadcast00001010.01001110.00100011.10111111
green = network part, grey = host part
hex0x0a4e2380
decimal172893056
reverse dns128.35.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2380

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.35.128/3210.78.35.128 – 10.78.35.12810.78.35.128
210.78.35.129/3210.78.35.129 – 10.78.35.12910.78.35.129
310.78.35.130/3210.78.35.130 – 10.78.35.13010.78.35.130
410.78.35.131/3210.78.35.131 – 10.78.35.13110.78.35.131
510.78.35.132/3210.78.35.132 – 10.78.35.13210.78.35.132
610.78.35.133/3210.78.35.133 – 10.78.35.13310.78.35.133
710.78.35.134/3210.78.35.134 – 10.78.35.13410.78.35.134
810.78.35.135/3210.78.35.135 – 10.78.35.13510.78.35.135
910.78.35.136/3210.78.35.136 – 10.78.35.13610.78.35.136
1010.78.35.137/3210.78.35.137 – 10.78.35.13710.78.35.137
1110.78.35.138/3210.78.35.138 – 10.78.35.13810.78.35.138
1210.78.35.139/3210.78.35.139 – 10.78.35.13910.78.35.139
1310.78.35.140/3210.78.35.140 – 10.78.35.14010.78.35.140
1410.78.35.141/3210.78.35.141 – 10.78.35.14110.78.35.141
1510.78.35.142/3210.78.35.142 – 10.78.35.14210.78.35.142
1610.78.35.143/3210.78.35.143 – 10.78.35.14310.78.35.143
1710.78.35.144/3210.78.35.144 – 10.78.35.14410.78.35.144
1810.78.35.145/3210.78.35.145 – 10.78.35.14510.78.35.145
1910.78.35.146/3210.78.35.146 – 10.78.35.14610.78.35.146
2010.78.35.147/3210.78.35.147 – 10.78.35.14710.78.35.147
2110.78.35.148/3210.78.35.148 – 10.78.35.14810.78.35.148
2210.78.35.149/3210.78.35.149 – 10.78.35.14910.78.35.149
2310.78.35.150/3210.78.35.150 – 10.78.35.15010.78.35.150
2410.78.35.151/3210.78.35.151 – 10.78.35.15110.78.35.151
2510.78.35.152/3210.78.35.152 – 10.78.35.15210.78.35.152
2610.78.35.153/3210.78.35.153 – 10.78.35.15310.78.35.153
2710.78.35.154/3210.78.35.154 – 10.78.35.15410.78.35.154
2810.78.35.155/3210.78.35.155 – 10.78.35.15510.78.35.155
2910.78.35.156/3210.78.35.156 – 10.78.35.15610.78.35.156
3010.78.35.157/3210.78.35.157 – 10.78.35.15710.78.35.157
3110.78.35.158/3210.78.35.158 – 10.78.35.15810.78.35.158
3210.78.35.159/3210.78.35.159 – 10.78.35.15910.78.35.159
3310.78.35.160/3210.78.35.160 – 10.78.35.16010.78.35.160
3410.78.35.161/3210.78.35.161 – 10.78.35.16110.78.35.161
3510.78.35.162/3210.78.35.162 – 10.78.35.16210.78.35.162
3610.78.35.163/3210.78.35.163 – 10.78.35.16310.78.35.163
3710.78.35.164/3210.78.35.164 – 10.78.35.16410.78.35.164
3810.78.35.165/3210.78.35.165 – 10.78.35.16510.78.35.165
3910.78.35.166/3210.78.35.166 – 10.78.35.16610.78.35.166
4010.78.35.167/3210.78.35.167 – 10.78.35.16710.78.35.167
4110.78.35.168/3210.78.35.168 – 10.78.35.16810.78.35.168
4210.78.35.169/3210.78.35.169 – 10.78.35.16910.78.35.169
4310.78.35.170/3210.78.35.170 – 10.78.35.17010.78.35.170
4410.78.35.171/3210.78.35.171 – 10.78.35.17110.78.35.171
4510.78.35.172/3210.78.35.172 – 10.78.35.17210.78.35.172
4610.78.35.173/3210.78.35.173 – 10.78.35.17310.78.35.173
4710.78.35.174/3210.78.35.174 – 10.78.35.17410.78.35.174
4810.78.35.175/3210.78.35.175 – 10.78.35.17510.78.35.175
4910.78.35.176/3210.78.35.176 – 10.78.35.17610.78.35.176
5010.78.35.177/3210.78.35.177 – 10.78.35.17710.78.35.177
5110.78.35.178/3210.78.35.178 – 10.78.35.17810.78.35.178
5210.78.35.179/3210.78.35.179 – 10.78.35.17910.78.35.179
5310.78.35.180/3210.78.35.180 – 10.78.35.18010.78.35.180
5410.78.35.181/3210.78.35.181 – 10.78.35.18110.78.35.181
5510.78.35.182/3210.78.35.182 – 10.78.35.18210.78.35.182
5610.78.35.183/3210.78.35.183 – 10.78.35.18310.78.35.183
5710.78.35.184/3210.78.35.184 – 10.78.35.18410.78.35.184
5810.78.35.185/3210.78.35.185 – 10.78.35.18510.78.35.185
5910.78.35.186/3210.78.35.186 – 10.78.35.18610.78.35.186
6010.78.35.187/3210.78.35.187 – 10.78.35.18710.78.35.187
6110.78.35.188/3210.78.35.188 – 10.78.35.18810.78.35.188
6210.78.35.189/3210.78.35.189 – 10.78.35.18910.78.35.189
6310.78.35.190/3210.78.35.190 – 10.78.35.19010.78.35.190
6410.78.35.191/3210.78.35.191 – 10.78.35.19110.78.35.191
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 →