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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)10.2.69.128/26
network10.2.69.128/26
broadcast10.2.69.191
first host10.2.69.129
last host10.2.69.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.2.69.128/26
address00001010.00000010.01000101.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000010.01000101.10000000
broadcast00001010.00000010.01000101.10111111
green = network part, grey = host part
hex0x0a024580
decimal167921024
reverse dns128.69.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:4580

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.69.128/3210.2.69.128 – 10.2.69.12810.2.69.128
210.2.69.129/3210.2.69.129 – 10.2.69.12910.2.69.129
310.2.69.130/3210.2.69.130 – 10.2.69.13010.2.69.130
410.2.69.131/3210.2.69.131 – 10.2.69.13110.2.69.131
510.2.69.132/3210.2.69.132 – 10.2.69.13210.2.69.132
610.2.69.133/3210.2.69.133 – 10.2.69.13310.2.69.133
710.2.69.134/3210.2.69.134 – 10.2.69.13410.2.69.134
810.2.69.135/3210.2.69.135 – 10.2.69.13510.2.69.135
910.2.69.136/3210.2.69.136 – 10.2.69.13610.2.69.136
1010.2.69.137/3210.2.69.137 – 10.2.69.13710.2.69.137
1110.2.69.138/3210.2.69.138 – 10.2.69.13810.2.69.138
1210.2.69.139/3210.2.69.139 – 10.2.69.13910.2.69.139
1310.2.69.140/3210.2.69.140 – 10.2.69.14010.2.69.140
1410.2.69.141/3210.2.69.141 – 10.2.69.14110.2.69.141
1510.2.69.142/3210.2.69.142 – 10.2.69.14210.2.69.142
1610.2.69.143/3210.2.69.143 – 10.2.69.14310.2.69.143
1710.2.69.144/3210.2.69.144 – 10.2.69.14410.2.69.144
1810.2.69.145/3210.2.69.145 – 10.2.69.14510.2.69.145
1910.2.69.146/3210.2.69.146 – 10.2.69.14610.2.69.146
2010.2.69.147/3210.2.69.147 – 10.2.69.14710.2.69.147
2110.2.69.148/3210.2.69.148 – 10.2.69.14810.2.69.148
2210.2.69.149/3210.2.69.149 – 10.2.69.14910.2.69.149
2310.2.69.150/3210.2.69.150 – 10.2.69.15010.2.69.150
2410.2.69.151/3210.2.69.151 – 10.2.69.15110.2.69.151
2510.2.69.152/3210.2.69.152 – 10.2.69.15210.2.69.152
2610.2.69.153/3210.2.69.153 – 10.2.69.15310.2.69.153
2710.2.69.154/3210.2.69.154 – 10.2.69.15410.2.69.154
2810.2.69.155/3210.2.69.155 – 10.2.69.15510.2.69.155
2910.2.69.156/3210.2.69.156 – 10.2.69.15610.2.69.156
3010.2.69.157/3210.2.69.157 – 10.2.69.15710.2.69.157
3110.2.69.158/3210.2.69.158 – 10.2.69.15810.2.69.158
3210.2.69.159/3210.2.69.159 – 10.2.69.15910.2.69.159
3310.2.69.160/3210.2.69.160 – 10.2.69.16010.2.69.160
3410.2.69.161/3210.2.69.161 – 10.2.69.16110.2.69.161
3510.2.69.162/3210.2.69.162 – 10.2.69.16210.2.69.162
3610.2.69.163/3210.2.69.163 – 10.2.69.16310.2.69.163
3710.2.69.164/3210.2.69.164 – 10.2.69.16410.2.69.164
3810.2.69.165/3210.2.69.165 – 10.2.69.16510.2.69.165
3910.2.69.166/3210.2.69.166 – 10.2.69.16610.2.69.166
4010.2.69.167/3210.2.69.167 – 10.2.69.16710.2.69.167
4110.2.69.168/3210.2.69.168 – 10.2.69.16810.2.69.168
4210.2.69.169/3210.2.69.169 – 10.2.69.16910.2.69.169
4310.2.69.170/3210.2.69.170 – 10.2.69.17010.2.69.170
4410.2.69.171/3210.2.69.171 – 10.2.69.17110.2.69.171
4510.2.69.172/3210.2.69.172 – 10.2.69.17210.2.69.172
4610.2.69.173/3210.2.69.173 – 10.2.69.17310.2.69.173
4710.2.69.174/3210.2.69.174 – 10.2.69.17410.2.69.174
4810.2.69.175/3210.2.69.175 – 10.2.69.17510.2.69.175
4910.2.69.176/3210.2.69.176 – 10.2.69.17610.2.69.176
5010.2.69.177/3210.2.69.177 – 10.2.69.17710.2.69.177
5110.2.69.178/3210.2.69.178 – 10.2.69.17810.2.69.178
5210.2.69.179/3210.2.69.179 – 10.2.69.17910.2.69.179
5310.2.69.180/3210.2.69.180 – 10.2.69.18010.2.69.180
5410.2.69.181/3210.2.69.181 – 10.2.69.18110.2.69.181
5510.2.69.182/3210.2.69.182 – 10.2.69.18210.2.69.182
5610.2.69.183/3210.2.69.183 – 10.2.69.18310.2.69.183
5710.2.69.184/3210.2.69.184 – 10.2.69.18410.2.69.184
5810.2.69.185/3210.2.69.185 – 10.2.69.18510.2.69.185
5910.2.69.186/3210.2.69.186 – 10.2.69.18610.2.69.186
6010.2.69.187/3210.2.69.187 – 10.2.69.18710.2.69.187
6110.2.69.188/3210.2.69.188 – 10.2.69.18810.2.69.188
6210.2.69.189/3210.2.69.189 – 10.2.69.18910.2.69.189
6310.2.69.190/3210.2.69.190 – 10.2.69.19010.2.69.190
6410.2.69.191/3210.2.69.191 – 10.2.69.19110.2.69.191
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 →