ip
ipku.in

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)10.2.237.128/26
network10.2.237.128/26
broadcast10.2.237.191
first host10.2.237.129
last host10.2.237.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.237.128/26
address00001010.00000010.11101101.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.11101101.10000000
broadcast00001010.00000010.11101101.10111111
green = network part, grey = host part
hex0x0a02ed80
decimal167964032
reverse dns128.237.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:ed80

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.237.128/3210.2.237.128 – 10.2.237.12810.2.237.128
210.2.237.129/3210.2.237.129 – 10.2.237.12910.2.237.129
310.2.237.130/3210.2.237.130 – 10.2.237.13010.2.237.130
410.2.237.131/3210.2.237.131 – 10.2.237.13110.2.237.131
510.2.237.132/3210.2.237.132 – 10.2.237.13210.2.237.132
610.2.237.133/3210.2.237.133 – 10.2.237.13310.2.237.133
710.2.237.134/3210.2.237.134 – 10.2.237.13410.2.237.134
810.2.237.135/3210.2.237.135 – 10.2.237.13510.2.237.135
910.2.237.136/3210.2.237.136 – 10.2.237.13610.2.237.136
1010.2.237.137/3210.2.237.137 – 10.2.237.13710.2.237.137
1110.2.237.138/3210.2.237.138 – 10.2.237.13810.2.237.138
1210.2.237.139/3210.2.237.139 – 10.2.237.13910.2.237.139
1310.2.237.140/3210.2.237.140 – 10.2.237.14010.2.237.140
1410.2.237.141/3210.2.237.141 – 10.2.237.14110.2.237.141
1510.2.237.142/3210.2.237.142 – 10.2.237.14210.2.237.142
1610.2.237.143/3210.2.237.143 – 10.2.237.14310.2.237.143
1710.2.237.144/3210.2.237.144 – 10.2.237.14410.2.237.144
1810.2.237.145/3210.2.237.145 – 10.2.237.14510.2.237.145
1910.2.237.146/3210.2.237.146 – 10.2.237.14610.2.237.146
2010.2.237.147/3210.2.237.147 – 10.2.237.14710.2.237.147
2110.2.237.148/3210.2.237.148 – 10.2.237.14810.2.237.148
2210.2.237.149/3210.2.237.149 – 10.2.237.14910.2.237.149
2310.2.237.150/3210.2.237.150 – 10.2.237.15010.2.237.150
2410.2.237.151/3210.2.237.151 – 10.2.237.15110.2.237.151
2510.2.237.152/3210.2.237.152 – 10.2.237.15210.2.237.152
2610.2.237.153/3210.2.237.153 – 10.2.237.15310.2.237.153
2710.2.237.154/3210.2.237.154 – 10.2.237.15410.2.237.154
2810.2.237.155/3210.2.237.155 – 10.2.237.15510.2.237.155
2910.2.237.156/3210.2.237.156 – 10.2.237.15610.2.237.156
3010.2.237.157/3210.2.237.157 – 10.2.237.15710.2.237.157
3110.2.237.158/3210.2.237.158 – 10.2.237.15810.2.237.158
3210.2.237.159/3210.2.237.159 – 10.2.237.15910.2.237.159
3310.2.237.160/3210.2.237.160 – 10.2.237.16010.2.237.160
3410.2.237.161/3210.2.237.161 – 10.2.237.16110.2.237.161
3510.2.237.162/3210.2.237.162 – 10.2.237.16210.2.237.162
3610.2.237.163/3210.2.237.163 – 10.2.237.16310.2.237.163
3710.2.237.164/3210.2.237.164 – 10.2.237.16410.2.237.164
3810.2.237.165/3210.2.237.165 – 10.2.237.16510.2.237.165
3910.2.237.166/3210.2.237.166 – 10.2.237.16610.2.237.166
4010.2.237.167/3210.2.237.167 – 10.2.237.16710.2.237.167
4110.2.237.168/3210.2.237.168 – 10.2.237.16810.2.237.168
4210.2.237.169/3210.2.237.169 – 10.2.237.16910.2.237.169
4310.2.237.170/3210.2.237.170 – 10.2.237.17010.2.237.170
4410.2.237.171/3210.2.237.171 – 10.2.237.17110.2.237.171
4510.2.237.172/3210.2.237.172 – 10.2.237.17210.2.237.172
4610.2.237.173/3210.2.237.173 – 10.2.237.17310.2.237.173
4710.2.237.174/3210.2.237.174 – 10.2.237.17410.2.237.174
4810.2.237.175/3210.2.237.175 – 10.2.237.17510.2.237.175
4910.2.237.176/3210.2.237.176 – 10.2.237.17610.2.237.176
5010.2.237.177/3210.2.237.177 – 10.2.237.17710.2.237.177
5110.2.237.178/3210.2.237.178 – 10.2.237.17810.2.237.178
5210.2.237.179/3210.2.237.179 – 10.2.237.17910.2.237.179
5310.2.237.180/3210.2.237.180 – 10.2.237.18010.2.237.180
5410.2.237.181/3210.2.237.181 – 10.2.237.18110.2.237.181
5510.2.237.182/3210.2.237.182 – 10.2.237.18210.2.237.182
5610.2.237.183/3210.2.237.183 – 10.2.237.18310.2.237.183
5710.2.237.184/3210.2.237.184 – 10.2.237.18410.2.237.184
5810.2.237.185/3210.2.237.185 – 10.2.237.18510.2.237.185
5910.2.237.186/3210.2.237.186 – 10.2.237.18610.2.237.186
6010.2.237.187/3210.2.237.187 – 10.2.237.18710.2.237.187
6110.2.237.188/3210.2.237.188 – 10.2.237.18810.2.237.188
6210.2.237.189/3210.2.237.189 – 10.2.237.18910.2.237.189
6310.2.237.190/3210.2.237.190 – 10.2.237.19010.2.237.190
6410.2.237.191/3210.2.237.191 – 10.2.237.19110.2.237.191
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 →