ip
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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)10.78.76.128/26
network10.78.76.128/26
broadcast10.78.76.191
first host10.78.76.129
last host10.78.76.190
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.78.76.128/26
address00001010.01001110.01001100.10000000
subnet mask11111111.11111111.11111111.11000000
network00001010.01001110.01001100.10000000
broadcast00001010.01001110.01001100.10111111
green = network part, grey = host part
hex0x0a4e4c80
decimal172903552
reverse dns128.76.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4c80

/26 split into /31 · 32 subnets

close ×
#networkhost rangebroadcast
110.78.76.128/3110.78.76.128 – 10.78.76.12910.78.76.129
210.78.76.130/3110.78.76.130 – 10.78.76.13110.78.76.131
310.78.76.132/3110.78.76.132 – 10.78.76.13310.78.76.133
410.78.76.134/3110.78.76.134 – 10.78.76.13510.78.76.135
510.78.76.136/3110.78.76.136 – 10.78.76.13710.78.76.137
610.78.76.138/3110.78.76.138 – 10.78.76.13910.78.76.139
710.78.76.140/3110.78.76.140 – 10.78.76.14110.78.76.141
810.78.76.142/3110.78.76.142 – 10.78.76.14310.78.76.143
910.78.76.144/3110.78.76.144 – 10.78.76.14510.78.76.145
1010.78.76.146/3110.78.76.146 – 10.78.76.14710.78.76.147
1110.78.76.148/3110.78.76.148 – 10.78.76.14910.78.76.149
1210.78.76.150/3110.78.76.150 – 10.78.76.15110.78.76.151
1310.78.76.152/3110.78.76.152 – 10.78.76.15310.78.76.153
1410.78.76.154/3110.78.76.154 – 10.78.76.15510.78.76.155
1510.78.76.156/3110.78.76.156 – 10.78.76.15710.78.76.157
1610.78.76.158/3110.78.76.158 – 10.78.76.15910.78.76.159
1710.78.76.160/3110.78.76.160 – 10.78.76.16110.78.76.161
1810.78.76.162/3110.78.76.162 – 10.78.76.16310.78.76.163
1910.78.76.164/3110.78.76.164 – 10.78.76.16510.78.76.165
2010.78.76.166/3110.78.76.166 – 10.78.76.16710.78.76.167
2110.78.76.168/3110.78.76.168 – 10.78.76.16910.78.76.169
2210.78.76.170/3110.78.76.170 – 10.78.76.17110.78.76.171
2310.78.76.172/3110.78.76.172 – 10.78.76.17310.78.76.173
2410.78.76.174/3110.78.76.174 – 10.78.76.17510.78.76.175
2510.78.76.176/3110.78.76.176 – 10.78.76.17710.78.76.177
2610.78.76.178/3110.78.76.178 – 10.78.76.17910.78.76.179
2710.78.76.180/3110.78.76.180 – 10.78.76.18110.78.76.181
2810.78.76.182/3110.78.76.182 – 10.78.76.18310.78.76.183
2910.78.76.184/3110.78.76.184 – 10.78.76.18510.78.76.185
3010.78.76.186/3110.78.76.186 – 10.78.76.18710.78.76.187
3110.78.76.188/3110.78.76.188 – 10.78.76.18910.78.76.189
3210.78.76.190/3110.78.76.190 – 10.78.76.19110.78.76.191
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 →