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)10.71.200.0/22
network10.71.200.0/22
broadcast10.71.203.255
first host10.71.200.1
last host10.71.203.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.71.200.0/22
address00001010.01000111.11001000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01000111.11001000.00000000
broadcast00001010.01000111.11001011.11111111
green = network part, grey = host part
hex0x0a47c800
decimal172476416
reverse dns0.200.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:c800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.71.200.0/2810.71.200.1 – 10.71.200.1410.71.200.15
210.71.200.16/2810.71.200.17 – 10.71.200.3010.71.200.31
310.71.200.32/2810.71.200.33 – 10.71.200.4610.71.200.47
410.71.200.48/2810.71.200.49 – 10.71.200.6210.71.200.63
510.71.200.64/2810.71.200.65 – 10.71.200.7810.71.200.79
610.71.200.80/2810.71.200.81 – 10.71.200.9410.71.200.95
710.71.200.96/2810.71.200.97 – 10.71.200.11010.71.200.111
810.71.200.112/2810.71.200.113 – 10.71.200.12610.71.200.127
910.71.200.128/2810.71.200.129 – 10.71.200.14210.71.200.143
1010.71.200.144/2810.71.200.145 – 10.71.200.15810.71.200.159
1110.71.200.160/2810.71.200.161 – 10.71.200.17410.71.200.175
1210.71.200.176/2810.71.200.177 – 10.71.200.19010.71.200.191
1310.71.200.192/2810.71.200.193 – 10.71.200.20610.71.200.207
1410.71.200.208/2810.71.200.209 – 10.71.200.22210.71.200.223
1510.71.200.224/2810.71.200.225 – 10.71.200.23810.71.200.239
1610.71.200.240/2810.71.200.241 – 10.71.200.25410.71.200.255
1710.71.201.0/2810.71.201.1 – 10.71.201.1410.71.201.15
1810.71.201.16/2810.71.201.17 – 10.71.201.3010.71.201.31
1910.71.201.32/2810.71.201.33 – 10.71.201.4610.71.201.47
2010.71.201.48/2810.71.201.49 – 10.71.201.6210.71.201.63
2110.71.201.64/2810.71.201.65 – 10.71.201.7810.71.201.79
2210.71.201.80/2810.71.201.81 – 10.71.201.9410.71.201.95
2310.71.201.96/2810.71.201.97 – 10.71.201.11010.71.201.111
2410.71.201.112/2810.71.201.113 – 10.71.201.12610.71.201.127
2510.71.201.128/2810.71.201.129 – 10.71.201.14210.71.201.143
2610.71.201.144/2810.71.201.145 – 10.71.201.15810.71.201.159
2710.71.201.160/2810.71.201.161 – 10.71.201.17410.71.201.175
2810.71.201.176/2810.71.201.177 – 10.71.201.19010.71.201.191
2910.71.201.192/2810.71.201.193 – 10.71.201.20610.71.201.207
3010.71.201.208/2810.71.201.209 – 10.71.201.22210.71.201.223
3110.71.201.224/2810.71.201.225 – 10.71.201.23810.71.201.239
3210.71.201.240/2810.71.201.241 – 10.71.201.25410.71.201.255
3310.71.202.0/2810.71.202.1 – 10.71.202.1410.71.202.15
3410.71.202.16/2810.71.202.17 – 10.71.202.3010.71.202.31
3510.71.202.32/2810.71.202.33 – 10.71.202.4610.71.202.47
3610.71.202.48/2810.71.202.49 – 10.71.202.6210.71.202.63
3710.71.202.64/2810.71.202.65 – 10.71.202.7810.71.202.79
3810.71.202.80/2810.71.202.81 – 10.71.202.9410.71.202.95
3910.71.202.96/2810.71.202.97 – 10.71.202.11010.71.202.111
4010.71.202.112/2810.71.202.113 – 10.71.202.12610.71.202.127
4110.71.202.128/2810.71.202.129 – 10.71.202.14210.71.202.143
4210.71.202.144/2810.71.202.145 – 10.71.202.15810.71.202.159
4310.71.202.160/2810.71.202.161 – 10.71.202.17410.71.202.175
4410.71.202.176/2810.71.202.177 – 10.71.202.19010.71.202.191
4510.71.202.192/2810.71.202.193 – 10.71.202.20610.71.202.207
4610.71.202.208/2810.71.202.209 – 10.71.202.22210.71.202.223
4710.71.202.224/2810.71.202.225 – 10.71.202.23810.71.202.239
4810.71.202.240/2810.71.202.241 – 10.71.202.25410.71.202.255
4910.71.203.0/2810.71.203.1 – 10.71.203.1410.71.203.15
5010.71.203.16/2810.71.203.17 – 10.71.203.3010.71.203.31
5110.71.203.32/2810.71.203.33 – 10.71.203.4610.71.203.47
5210.71.203.48/2810.71.203.49 – 10.71.203.6210.71.203.63
5310.71.203.64/2810.71.203.65 – 10.71.203.7810.71.203.79
5410.71.203.80/2810.71.203.81 – 10.71.203.9410.71.203.95
5510.71.203.96/2810.71.203.97 – 10.71.203.11010.71.203.111
5610.71.203.112/2810.71.203.113 – 10.71.203.12610.71.203.127
5710.71.203.128/2810.71.203.129 – 10.71.203.14210.71.203.143
5810.71.203.144/2810.71.203.145 – 10.71.203.15810.71.203.159
5910.71.203.160/2810.71.203.161 – 10.71.203.17410.71.203.175
6010.71.203.176/2810.71.203.177 – 10.71.203.19010.71.203.191
6110.71.203.192/2810.71.203.193 – 10.71.203.20610.71.203.207
6210.71.203.208/2810.71.203.209 – 10.71.203.22210.71.203.223
6310.71.203.224/2810.71.203.225 – 10.71.203.23810.71.203.239
6410.71.203.240/2810.71.203.241 – 10.71.203.25410.71.203.255
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 →