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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)10.3.89.128/26
network10.3.89.128/26
broadcast10.3.89.191
first host10.3.89.129
last host10.3.89.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.3.89.128/26
address00001010.00000011.01011001.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00000011.01011001.10000000
broadcast00001010.00000011.01011001.10111111
green = network part, grey = host part
hex0x0a035980
decimal167991680
reverse dns128.89.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:5980

/26 split into /32 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.89.128/3210.3.89.128 – 10.3.89.12810.3.89.128
210.3.89.129/3210.3.89.129 – 10.3.89.12910.3.89.129
310.3.89.130/3210.3.89.130 – 10.3.89.13010.3.89.130
410.3.89.131/3210.3.89.131 – 10.3.89.13110.3.89.131
510.3.89.132/3210.3.89.132 – 10.3.89.13210.3.89.132
610.3.89.133/3210.3.89.133 – 10.3.89.13310.3.89.133
710.3.89.134/3210.3.89.134 – 10.3.89.13410.3.89.134
810.3.89.135/3210.3.89.135 – 10.3.89.13510.3.89.135
910.3.89.136/3210.3.89.136 – 10.3.89.13610.3.89.136
1010.3.89.137/3210.3.89.137 – 10.3.89.13710.3.89.137
1110.3.89.138/3210.3.89.138 – 10.3.89.13810.3.89.138
1210.3.89.139/3210.3.89.139 – 10.3.89.13910.3.89.139
1310.3.89.140/3210.3.89.140 – 10.3.89.14010.3.89.140
1410.3.89.141/3210.3.89.141 – 10.3.89.14110.3.89.141
1510.3.89.142/3210.3.89.142 – 10.3.89.14210.3.89.142
1610.3.89.143/3210.3.89.143 – 10.3.89.14310.3.89.143
1710.3.89.144/3210.3.89.144 – 10.3.89.14410.3.89.144
1810.3.89.145/3210.3.89.145 – 10.3.89.14510.3.89.145
1910.3.89.146/3210.3.89.146 – 10.3.89.14610.3.89.146
2010.3.89.147/3210.3.89.147 – 10.3.89.14710.3.89.147
2110.3.89.148/3210.3.89.148 – 10.3.89.14810.3.89.148
2210.3.89.149/3210.3.89.149 – 10.3.89.14910.3.89.149
2310.3.89.150/3210.3.89.150 – 10.3.89.15010.3.89.150
2410.3.89.151/3210.3.89.151 – 10.3.89.15110.3.89.151
2510.3.89.152/3210.3.89.152 – 10.3.89.15210.3.89.152
2610.3.89.153/3210.3.89.153 – 10.3.89.15310.3.89.153
2710.3.89.154/3210.3.89.154 – 10.3.89.15410.3.89.154
2810.3.89.155/3210.3.89.155 – 10.3.89.15510.3.89.155
2910.3.89.156/3210.3.89.156 – 10.3.89.15610.3.89.156
3010.3.89.157/3210.3.89.157 – 10.3.89.15710.3.89.157
3110.3.89.158/3210.3.89.158 – 10.3.89.15810.3.89.158
3210.3.89.159/3210.3.89.159 – 10.3.89.15910.3.89.159
3310.3.89.160/3210.3.89.160 – 10.3.89.16010.3.89.160
3410.3.89.161/3210.3.89.161 – 10.3.89.16110.3.89.161
3510.3.89.162/3210.3.89.162 – 10.3.89.16210.3.89.162
3610.3.89.163/3210.3.89.163 – 10.3.89.16310.3.89.163
3710.3.89.164/3210.3.89.164 – 10.3.89.16410.3.89.164
3810.3.89.165/3210.3.89.165 – 10.3.89.16510.3.89.165
3910.3.89.166/3210.3.89.166 – 10.3.89.16610.3.89.166
4010.3.89.167/3210.3.89.167 – 10.3.89.16710.3.89.167
4110.3.89.168/3210.3.89.168 – 10.3.89.16810.3.89.168
4210.3.89.169/3210.3.89.169 – 10.3.89.16910.3.89.169
4310.3.89.170/3210.3.89.170 – 10.3.89.17010.3.89.170
4410.3.89.171/3210.3.89.171 – 10.3.89.17110.3.89.171
4510.3.89.172/3210.3.89.172 – 10.3.89.17210.3.89.172
4610.3.89.173/3210.3.89.173 – 10.3.89.17310.3.89.173
4710.3.89.174/3210.3.89.174 – 10.3.89.17410.3.89.174
4810.3.89.175/3210.3.89.175 – 10.3.89.17510.3.89.175
4910.3.89.176/3210.3.89.176 – 10.3.89.17610.3.89.176
5010.3.89.177/3210.3.89.177 – 10.3.89.17710.3.89.177
5110.3.89.178/3210.3.89.178 – 10.3.89.17810.3.89.178
5210.3.89.179/3210.3.89.179 – 10.3.89.17910.3.89.179
5310.3.89.180/3210.3.89.180 – 10.3.89.18010.3.89.180
5410.3.89.181/3210.3.89.181 – 10.3.89.18110.3.89.181
5510.3.89.182/3210.3.89.182 – 10.3.89.18210.3.89.182
5610.3.89.183/3210.3.89.183 – 10.3.89.18310.3.89.183
5710.3.89.184/3210.3.89.184 – 10.3.89.18410.3.89.184
5810.3.89.185/3210.3.89.185 – 10.3.89.18510.3.89.185
5910.3.89.186/3210.3.89.186 – 10.3.89.18610.3.89.186
6010.3.89.187/3210.3.89.187 – 10.3.89.18710.3.89.187
6110.3.89.188/3210.3.89.188 – 10.3.89.18810.3.89.188
6210.3.89.189/3210.3.89.189 – 10.3.89.18910.3.89.189
6310.3.89.190/3210.3.89.190 – 10.3.89.19010.3.89.190
6410.3.89.191/3210.3.89.191 – 10.3.89.19110.3.89.191
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 →