ip
ipku.in

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)10.187.112.0/22
network10.187.112.0/22
broadcast10.187.115.255
first host10.187.112.1
last host10.187.115.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.187.112.0/22
address00001010.10111011.01110000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10111011.01110000.00000000
broadcast00001010.10111011.01110011.11111111
green = network part, grey = host part
hex0x0abb7000
decimal180056064
reverse dns0.112.187.10.in-addr.arpa
ipv4-mapped::ffff:abb:7000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.187.112.0/2810.187.112.1 – 10.187.112.1410.187.112.15
210.187.112.16/2810.187.112.17 – 10.187.112.3010.187.112.31
310.187.112.32/2810.187.112.33 – 10.187.112.4610.187.112.47
410.187.112.48/2810.187.112.49 – 10.187.112.6210.187.112.63
510.187.112.64/2810.187.112.65 – 10.187.112.7810.187.112.79
610.187.112.80/2810.187.112.81 – 10.187.112.9410.187.112.95
710.187.112.96/2810.187.112.97 – 10.187.112.11010.187.112.111
810.187.112.112/2810.187.112.113 – 10.187.112.12610.187.112.127
910.187.112.128/2810.187.112.129 – 10.187.112.14210.187.112.143
1010.187.112.144/2810.187.112.145 – 10.187.112.15810.187.112.159
1110.187.112.160/2810.187.112.161 – 10.187.112.17410.187.112.175
1210.187.112.176/2810.187.112.177 – 10.187.112.19010.187.112.191
1310.187.112.192/2810.187.112.193 – 10.187.112.20610.187.112.207
1410.187.112.208/2810.187.112.209 – 10.187.112.22210.187.112.223
1510.187.112.224/2810.187.112.225 – 10.187.112.23810.187.112.239
1610.187.112.240/2810.187.112.241 – 10.187.112.25410.187.112.255
1710.187.113.0/2810.187.113.1 – 10.187.113.1410.187.113.15
1810.187.113.16/2810.187.113.17 – 10.187.113.3010.187.113.31
1910.187.113.32/2810.187.113.33 – 10.187.113.4610.187.113.47
2010.187.113.48/2810.187.113.49 – 10.187.113.6210.187.113.63
2110.187.113.64/2810.187.113.65 – 10.187.113.7810.187.113.79
2210.187.113.80/2810.187.113.81 – 10.187.113.9410.187.113.95
2310.187.113.96/2810.187.113.97 – 10.187.113.11010.187.113.111
2410.187.113.112/2810.187.113.113 – 10.187.113.12610.187.113.127
2510.187.113.128/2810.187.113.129 – 10.187.113.14210.187.113.143
2610.187.113.144/2810.187.113.145 – 10.187.113.15810.187.113.159
2710.187.113.160/2810.187.113.161 – 10.187.113.17410.187.113.175
2810.187.113.176/2810.187.113.177 – 10.187.113.19010.187.113.191
2910.187.113.192/2810.187.113.193 – 10.187.113.20610.187.113.207
3010.187.113.208/2810.187.113.209 – 10.187.113.22210.187.113.223
3110.187.113.224/2810.187.113.225 – 10.187.113.23810.187.113.239
3210.187.113.240/2810.187.113.241 – 10.187.113.25410.187.113.255
3310.187.114.0/2810.187.114.1 – 10.187.114.1410.187.114.15
3410.187.114.16/2810.187.114.17 – 10.187.114.3010.187.114.31
3510.187.114.32/2810.187.114.33 – 10.187.114.4610.187.114.47
3610.187.114.48/2810.187.114.49 – 10.187.114.6210.187.114.63
3710.187.114.64/2810.187.114.65 – 10.187.114.7810.187.114.79
3810.187.114.80/2810.187.114.81 – 10.187.114.9410.187.114.95
3910.187.114.96/2810.187.114.97 – 10.187.114.11010.187.114.111
4010.187.114.112/2810.187.114.113 – 10.187.114.12610.187.114.127
4110.187.114.128/2810.187.114.129 – 10.187.114.14210.187.114.143
4210.187.114.144/2810.187.114.145 – 10.187.114.15810.187.114.159
4310.187.114.160/2810.187.114.161 – 10.187.114.17410.187.114.175
4410.187.114.176/2810.187.114.177 – 10.187.114.19010.187.114.191
4510.187.114.192/2810.187.114.193 – 10.187.114.20610.187.114.207
4610.187.114.208/2810.187.114.209 – 10.187.114.22210.187.114.223
4710.187.114.224/2810.187.114.225 – 10.187.114.23810.187.114.239
4810.187.114.240/2810.187.114.241 – 10.187.114.25410.187.114.255
4910.187.115.0/2810.187.115.1 – 10.187.115.1410.187.115.15
5010.187.115.16/2810.187.115.17 – 10.187.115.3010.187.115.31
5110.187.115.32/2810.187.115.33 – 10.187.115.4610.187.115.47
5210.187.115.48/2810.187.115.49 – 10.187.115.6210.187.115.63
5310.187.115.64/2810.187.115.65 – 10.187.115.7810.187.115.79
5410.187.115.80/2810.187.115.81 – 10.187.115.9410.187.115.95
5510.187.115.96/2810.187.115.97 – 10.187.115.11010.187.115.111
5610.187.115.112/2810.187.115.113 – 10.187.115.12610.187.115.127
5710.187.115.128/2810.187.115.129 – 10.187.115.14210.187.115.143
5810.187.115.144/2810.187.115.145 – 10.187.115.15810.187.115.159
5910.187.115.160/2810.187.115.161 – 10.187.115.17410.187.115.175
6010.187.115.176/2810.187.115.177 – 10.187.115.19010.187.115.191
6110.187.115.192/2810.187.115.193 – 10.187.115.20610.187.115.207
6210.187.115.208/2810.187.115.209 – 10.187.115.22210.187.115.223
6310.187.115.224/2810.187.115.225 – 10.187.115.23810.187.115.239
6410.187.115.240/2810.187.115.241 – 10.187.115.25410.187.115.255
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 →