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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)10.231.12.0/22
network10.231.12.0/22
broadcast10.231.15.255
first host10.231.12.1
last host10.231.15.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.231.12.0/22
address00001010.11100111.00001100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.11100111.00001100.00000000
broadcast00001010.11100111.00001111.11111111
green = network part, grey = host part
hex0x0ae70c00
decimal182914048
reverse dns0.12.231.10.in-addr.arpa
ipv4-mapped::ffff:ae7:c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.231.12.0/2810.231.12.1 – 10.231.12.1410.231.12.15
210.231.12.16/2810.231.12.17 – 10.231.12.3010.231.12.31
310.231.12.32/2810.231.12.33 – 10.231.12.4610.231.12.47
410.231.12.48/2810.231.12.49 – 10.231.12.6210.231.12.63
510.231.12.64/2810.231.12.65 – 10.231.12.7810.231.12.79
610.231.12.80/2810.231.12.81 – 10.231.12.9410.231.12.95
710.231.12.96/2810.231.12.97 – 10.231.12.11010.231.12.111
810.231.12.112/2810.231.12.113 – 10.231.12.12610.231.12.127
910.231.12.128/2810.231.12.129 – 10.231.12.14210.231.12.143
1010.231.12.144/2810.231.12.145 – 10.231.12.15810.231.12.159
1110.231.12.160/2810.231.12.161 – 10.231.12.17410.231.12.175
1210.231.12.176/2810.231.12.177 – 10.231.12.19010.231.12.191
1310.231.12.192/2810.231.12.193 – 10.231.12.20610.231.12.207
1410.231.12.208/2810.231.12.209 – 10.231.12.22210.231.12.223
1510.231.12.224/2810.231.12.225 – 10.231.12.23810.231.12.239
1610.231.12.240/2810.231.12.241 – 10.231.12.25410.231.12.255
1710.231.13.0/2810.231.13.1 – 10.231.13.1410.231.13.15
1810.231.13.16/2810.231.13.17 – 10.231.13.3010.231.13.31
1910.231.13.32/2810.231.13.33 – 10.231.13.4610.231.13.47
2010.231.13.48/2810.231.13.49 – 10.231.13.6210.231.13.63
2110.231.13.64/2810.231.13.65 – 10.231.13.7810.231.13.79
2210.231.13.80/2810.231.13.81 – 10.231.13.9410.231.13.95
2310.231.13.96/2810.231.13.97 – 10.231.13.11010.231.13.111
2410.231.13.112/2810.231.13.113 – 10.231.13.12610.231.13.127
2510.231.13.128/2810.231.13.129 – 10.231.13.14210.231.13.143
2610.231.13.144/2810.231.13.145 – 10.231.13.15810.231.13.159
2710.231.13.160/2810.231.13.161 – 10.231.13.17410.231.13.175
2810.231.13.176/2810.231.13.177 – 10.231.13.19010.231.13.191
2910.231.13.192/2810.231.13.193 – 10.231.13.20610.231.13.207
3010.231.13.208/2810.231.13.209 – 10.231.13.22210.231.13.223
3110.231.13.224/2810.231.13.225 – 10.231.13.23810.231.13.239
3210.231.13.240/2810.231.13.241 – 10.231.13.25410.231.13.255
3310.231.14.0/2810.231.14.1 – 10.231.14.1410.231.14.15
3410.231.14.16/2810.231.14.17 – 10.231.14.3010.231.14.31
3510.231.14.32/2810.231.14.33 – 10.231.14.4610.231.14.47
3610.231.14.48/2810.231.14.49 – 10.231.14.6210.231.14.63
3710.231.14.64/2810.231.14.65 – 10.231.14.7810.231.14.79
3810.231.14.80/2810.231.14.81 – 10.231.14.9410.231.14.95
3910.231.14.96/2810.231.14.97 – 10.231.14.11010.231.14.111
4010.231.14.112/2810.231.14.113 – 10.231.14.12610.231.14.127
4110.231.14.128/2810.231.14.129 – 10.231.14.14210.231.14.143
4210.231.14.144/2810.231.14.145 – 10.231.14.15810.231.14.159
4310.231.14.160/2810.231.14.161 – 10.231.14.17410.231.14.175
4410.231.14.176/2810.231.14.177 – 10.231.14.19010.231.14.191
4510.231.14.192/2810.231.14.193 – 10.231.14.20610.231.14.207
4610.231.14.208/2810.231.14.209 – 10.231.14.22210.231.14.223
4710.231.14.224/2810.231.14.225 – 10.231.14.23810.231.14.239
4810.231.14.240/2810.231.14.241 – 10.231.14.25410.231.14.255
4910.231.15.0/2810.231.15.1 – 10.231.15.1410.231.15.15
5010.231.15.16/2810.231.15.17 – 10.231.15.3010.231.15.31
5110.231.15.32/2810.231.15.33 – 10.231.15.4610.231.15.47
5210.231.15.48/2810.231.15.49 – 10.231.15.6210.231.15.63
5310.231.15.64/2810.231.15.65 – 10.231.15.7810.231.15.79
5410.231.15.80/2810.231.15.81 – 10.231.15.9410.231.15.95
5510.231.15.96/2810.231.15.97 – 10.231.15.11010.231.15.111
5610.231.15.112/2810.231.15.113 – 10.231.15.12610.231.15.127
5710.231.15.128/2810.231.15.129 – 10.231.15.14210.231.15.143
5810.231.15.144/2810.231.15.145 – 10.231.15.15810.231.15.159
5910.231.15.160/2810.231.15.161 – 10.231.15.17410.231.15.175
6010.231.15.176/2810.231.15.177 – 10.231.15.19010.231.15.191
6110.231.15.192/2810.231.15.193 – 10.231.15.20610.231.15.207
6210.231.15.208/2810.231.15.209 – 10.231.15.22210.231.15.223
6310.231.15.224/2810.231.15.225 – 10.231.15.23810.231.15.239
6410.231.15.240/2810.231.15.241 – 10.231.15.25410.231.15.255
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 →