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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)10.0.58.128/26
network10.0.58.128/26
broadcast10.0.58.191
first host10.0.58.129
last host10.0.58.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.0.58.128/26
address00001010.00000000.00111010.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000000.00111010.10000000
broadcast00001010.00000000.00111010.10111111
green = network part, grey = host part
hex0x0a003a80
decimal167787136
reverse dns128.58.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:3a80

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.58.128/3210.0.58.128 – 10.0.58.12810.0.58.128
210.0.58.129/3210.0.58.129 – 10.0.58.12910.0.58.129
310.0.58.130/3210.0.58.130 – 10.0.58.13010.0.58.130
410.0.58.131/3210.0.58.131 – 10.0.58.13110.0.58.131
510.0.58.132/3210.0.58.132 – 10.0.58.13210.0.58.132
610.0.58.133/3210.0.58.133 – 10.0.58.13310.0.58.133
710.0.58.134/3210.0.58.134 – 10.0.58.13410.0.58.134
810.0.58.135/3210.0.58.135 – 10.0.58.13510.0.58.135
910.0.58.136/3210.0.58.136 – 10.0.58.13610.0.58.136
1010.0.58.137/3210.0.58.137 – 10.0.58.13710.0.58.137
1110.0.58.138/3210.0.58.138 – 10.0.58.13810.0.58.138
1210.0.58.139/3210.0.58.139 – 10.0.58.13910.0.58.139
1310.0.58.140/3210.0.58.140 – 10.0.58.14010.0.58.140
1410.0.58.141/3210.0.58.141 – 10.0.58.14110.0.58.141
1510.0.58.142/3210.0.58.142 – 10.0.58.14210.0.58.142
1610.0.58.143/3210.0.58.143 – 10.0.58.14310.0.58.143
1710.0.58.144/3210.0.58.144 – 10.0.58.14410.0.58.144
1810.0.58.145/3210.0.58.145 – 10.0.58.14510.0.58.145
1910.0.58.146/3210.0.58.146 – 10.0.58.14610.0.58.146
2010.0.58.147/3210.0.58.147 – 10.0.58.14710.0.58.147
2110.0.58.148/3210.0.58.148 – 10.0.58.14810.0.58.148
2210.0.58.149/3210.0.58.149 – 10.0.58.14910.0.58.149
2310.0.58.150/3210.0.58.150 – 10.0.58.15010.0.58.150
2410.0.58.151/3210.0.58.151 – 10.0.58.15110.0.58.151
2510.0.58.152/3210.0.58.152 – 10.0.58.15210.0.58.152
2610.0.58.153/3210.0.58.153 – 10.0.58.15310.0.58.153
2710.0.58.154/3210.0.58.154 – 10.0.58.15410.0.58.154
2810.0.58.155/3210.0.58.155 – 10.0.58.15510.0.58.155
2910.0.58.156/3210.0.58.156 – 10.0.58.15610.0.58.156
3010.0.58.157/3210.0.58.157 – 10.0.58.15710.0.58.157
3110.0.58.158/3210.0.58.158 – 10.0.58.15810.0.58.158
3210.0.58.159/3210.0.58.159 – 10.0.58.15910.0.58.159
3310.0.58.160/3210.0.58.160 – 10.0.58.16010.0.58.160
3410.0.58.161/3210.0.58.161 – 10.0.58.16110.0.58.161
3510.0.58.162/3210.0.58.162 – 10.0.58.16210.0.58.162
3610.0.58.163/3210.0.58.163 – 10.0.58.16310.0.58.163
3710.0.58.164/3210.0.58.164 – 10.0.58.16410.0.58.164
3810.0.58.165/3210.0.58.165 – 10.0.58.16510.0.58.165
3910.0.58.166/3210.0.58.166 – 10.0.58.16610.0.58.166
4010.0.58.167/3210.0.58.167 – 10.0.58.16710.0.58.167
4110.0.58.168/3210.0.58.168 – 10.0.58.16810.0.58.168
4210.0.58.169/3210.0.58.169 – 10.0.58.16910.0.58.169
4310.0.58.170/3210.0.58.170 – 10.0.58.17010.0.58.170
4410.0.58.171/3210.0.58.171 – 10.0.58.17110.0.58.171
4510.0.58.172/3210.0.58.172 – 10.0.58.17210.0.58.172
4610.0.58.173/3210.0.58.173 – 10.0.58.17310.0.58.173
4710.0.58.174/3210.0.58.174 – 10.0.58.17410.0.58.174
4810.0.58.175/3210.0.58.175 – 10.0.58.17510.0.58.175
4910.0.58.176/3210.0.58.176 – 10.0.58.17610.0.58.176
5010.0.58.177/3210.0.58.177 – 10.0.58.17710.0.58.177
5110.0.58.178/3210.0.58.178 – 10.0.58.17810.0.58.178
5210.0.58.179/3210.0.58.179 – 10.0.58.17910.0.58.179
5310.0.58.180/3210.0.58.180 – 10.0.58.18010.0.58.180
5410.0.58.181/3210.0.58.181 – 10.0.58.18110.0.58.181
5510.0.58.182/3210.0.58.182 – 10.0.58.18210.0.58.182
5610.0.58.183/3210.0.58.183 – 10.0.58.18310.0.58.183
5710.0.58.184/3210.0.58.184 – 10.0.58.18410.0.58.184
5810.0.58.185/3210.0.58.185 – 10.0.58.18510.0.58.185
5910.0.58.186/3210.0.58.186 – 10.0.58.18610.0.58.186
6010.0.58.187/3210.0.58.187 – 10.0.58.18710.0.58.187
6110.0.58.188/3210.0.58.188 – 10.0.58.18810.0.58.188
6210.0.58.189/3210.0.58.189 – 10.0.58.18910.0.58.189
6310.0.58.190/3210.0.58.190 – 10.0.58.19010.0.58.190
6410.0.58.191/3210.0.58.191 – 10.0.58.19110.0.58.191
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 →