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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)10.72.232.0/22
network10.72.232.0/22
broadcast10.72.235.255
first host10.72.232.1
last host10.72.235.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.72.232.0/22
address00001010.01001000.11101000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001000.11101000.00000000
broadcast00001010.01001000.11101011.11111111
green = network part, grey = host part
hex0x0a48e800
decimal172550144
reverse dns0.232.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:e800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.72.232.0/2810.72.232.1 – 10.72.232.1410.72.232.15
210.72.232.16/2810.72.232.17 – 10.72.232.3010.72.232.31
310.72.232.32/2810.72.232.33 – 10.72.232.4610.72.232.47
410.72.232.48/2810.72.232.49 – 10.72.232.6210.72.232.63
510.72.232.64/2810.72.232.65 – 10.72.232.7810.72.232.79
610.72.232.80/2810.72.232.81 – 10.72.232.9410.72.232.95
710.72.232.96/2810.72.232.97 – 10.72.232.11010.72.232.111
810.72.232.112/2810.72.232.113 – 10.72.232.12610.72.232.127
910.72.232.128/2810.72.232.129 – 10.72.232.14210.72.232.143
1010.72.232.144/2810.72.232.145 – 10.72.232.15810.72.232.159
1110.72.232.160/2810.72.232.161 – 10.72.232.17410.72.232.175
1210.72.232.176/2810.72.232.177 – 10.72.232.19010.72.232.191
1310.72.232.192/2810.72.232.193 – 10.72.232.20610.72.232.207
1410.72.232.208/2810.72.232.209 – 10.72.232.22210.72.232.223
1510.72.232.224/2810.72.232.225 – 10.72.232.23810.72.232.239
1610.72.232.240/2810.72.232.241 – 10.72.232.25410.72.232.255
1710.72.233.0/2810.72.233.1 – 10.72.233.1410.72.233.15
1810.72.233.16/2810.72.233.17 – 10.72.233.3010.72.233.31
1910.72.233.32/2810.72.233.33 – 10.72.233.4610.72.233.47
2010.72.233.48/2810.72.233.49 – 10.72.233.6210.72.233.63
2110.72.233.64/2810.72.233.65 – 10.72.233.7810.72.233.79
2210.72.233.80/2810.72.233.81 – 10.72.233.9410.72.233.95
2310.72.233.96/2810.72.233.97 – 10.72.233.11010.72.233.111
2410.72.233.112/2810.72.233.113 – 10.72.233.12610.72.233.127
2510.72.233.128/2810.72.233.129 – 10.72.233.14210.72.233.143
2610.72.233.144/2810.72.233.145 – 10.72.233.15810.72.233.159
2710.72.233.160/2810.72.233.161 – 10.72.233.17410.72.233.175
2810.72.233.176/2810.72.233.177 – 10.72.233.19010.72.233.191
2910.72.233.192/2810.72.233.193 – 10.72.233.20610.72.233.207
3010.72.233.208/2810.72.233.209 – 10.72.233.22210.72.233.223
3110.72.233.224/2810.72.233.225 – 10.72.233.23810.72.233.239
3210.72.233.240/2810.72.233.241 – 10.72.233.25410.72.233.255
3310.72.234.0/2810.72.234.1 – 10.72.234.1410.72.234.15
3410.72.234.16/2810.72.234.17 – 10.72.234.3010.72.234.31
3510.72.234.32/2810.72.234.33 – 10.72.234.4610.72.234.47
3610.72.234.48/2810.72.234.49 – 10.72.234.6210.72.234.63
3710.72.234.64/2810.72.234.65 – 10.72.234.7810.72.234.79
3810.72.234.80/2810.72.234.81 – 10.72.234.9410.72.234.95
3910.72.234.96/2810.72.234.97 – 10.72.234.11010.72.234.111
4010.72.234.112/2810.72.234.113 – 10.72.234.12610.72.234.127
4110.72.234.128/2810.72.234.129 – 10.72.234.14210.72.234.143
4210.72.234.144/2810.72.234.145 – 10.72.234.15810.72.234.159
4310.72.234.160/2810.72.234.161 – 10.72.234.17410.72.234.175
4410.72.234.176/2810.72.234.177 – 10.72.234.19010.72.234.191
4510.72.234.192/2810.72.234.193 – 10.72.234.20610.72.234.207
4610.72.234.208/2810.72.234.209 – 10.72.234.22210.72.234.223
4710.72.234.224/2810.72.234.225 – 10.72.234.23810.72.234.239
4810.72.234.240/2810.72.234.241 – 10.72.234.25410.72.234.255
4910.72.235.0/2810.72.235.1 – 10.72.235.1410.72.235.15
5010.72.235.16/2810.72.235.17 – 10.72.235.3010.72.235.31
5110.72.235.32/2810.72.235.33 – 10.72.235.4610.72.235.47
5210.72.235.48/2810.72.235.49 – 10.72.235.6210.72.235.63
5310.72.235.64/2810.72.235.65 – 10.72.235.7810.72.235.79
5410.72.235.80/2810.72.235.81 – 10.72.235.9410.72.235.95
5510.72.235.96/2810.72.235.97 – 10.72.235.11010.72.235.111
5610.72.235.112/2810.72.235.113 – 10.72.235.12610.72.235.127
5710.72.235.128/2810.72.235.129 – 10.72.235.14210.72.235.143
5810.72.235.144/2810.72.235.145 – 10.72.235.15810.72.235.159
5910.72.235.160/2810.72.235.161 – 10.72.235.17410.72.235.175
6010.72.235.176/2810.72.235.177 – 10.72.235.19010.72.235.191
6110.72.235.192/2810.72.235.193 – 10.72.235.20610.72.235.207
6210.72.235.208/2810.72.235.209 – 10.72.235.22210.72.235.223
6310.72.235.224/2810.72.235.225 – 10.72.235.23810.72.235.239
6410.72.235.240/2810.72.235.241 – 10.72.235.25410.72.235.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /22
/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-
/22255.255.252.01,0241,0221
/23255.255.254.05125102 split →
/24255.255.255.02562544 split →
/25255.255.255.1281281268 split →
/26255.255.255.192646216 split →
/27255.255.255.224323032 split →
/28255.255.255.240161464 split →
/29255.255.255.24886128 split →
/30255.255.255.25242256 split →
/31255.255.255.25422512 split →
/32255.255.255.255111,024 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 →