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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)10.1.140.0/22
network10.1.140.0/22
broadcast10.1.143.255
first host10.1.140.1
last host10.1.143.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.1.140.0/22
address00001010.00000001.10001100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000001.10001100.00000000
broadcast00001010.00000001.10001111.11111111
green = network part, grey = host part
hex0x0a018c00
decimal167873536
reverse dns0.140.1.10.in-addr.arpa
ipv4-mapped::ffff:a01:8c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.1.140.0/2810.1.140.1 – 10.1.140.1410.1.140.15
210.1.140.16/2810.1.140.17 – 10.1.140.3010.1.140.31
310.1.140.32/2810.1.140.33 – 10.1.140.4610.1.140.47
410.1.140.48/2810.1.140.49 – 10.1.140.6210.1.140.63
510.1.140.64/2810.1.140.65 – 10.1.140.7810.1.140.79
610.1.140.80/2810.1.140.81 – 10.1.140.9410.1.140.95
710.1.140.96/2810.1.140.97 – 10.1.140.11010.1.140.111
810.1.140.112/2810.1.140.113 – 10.1.140.12610.1.140.127
910.1.140.128/2810.1.140.129 – 10.1.140.14210.1.140.143
1010.1.140.144/2810.1.140.145 – 10.1.140.15810.1.140.159
1110.1.140.160/2810.1.140.161 – 10.1.140.17410.1.140.175
1210.1.140.176/2810.1.140.177 – 10.1.140.19010.1.140.191
1310.1.140.192/2810.1.140.193 – 10.1.140.20610.1.140.207
1410.1.140.208/2810.1.140.209 – 10.1.140.22210.1.140.223
1510.1.140.224/2810.1.140.225 – 10.1.140.23810.1.140.239
1610.1.140.240/2810.1.140.241 – 10.1.140.25410.1.140.255
1710.1.141.0/2810.1.141.1 – 10.1.141.1410.1.141.15
1810.1.141.16/2810.1.141.17 – 10.1.141.3010.1.141.31
1910.1.141.32/2810.1.141.33 – 10.1.141.4610.1.141.47
2010.1.141.48/2810.1.141.49 – 10.1.141.6210.1.141.63
2110.1.141.64/2810.1.141.65 – 10.1.141.7810.1.141.79
2210.1.141.80/2810.1.141.81 – 10.1.141.9410.1.141.95
2310.1.141.96/2810.1.141.97 – 10.1.141.11010.1.141.111
2410.1.141.112/2810.1.141.113 – 10.1.141.12610.1.141.127
2510.1.141.128/2810.1.141.129 – 10.1.141.14210.1.141.143
2610.1.141.144/2810.1.141.145 – 10.1.141.15810.1.141.159
2710.1.141.160/2810.1.141.161 – 10.1.141.17410.1.141.175
2810.1.141.176/2810.1.141.177 – 10.1.141.19010.1.141.191
2910.1.141.192/2810.1.141.193 – 10.1.141.20610.1.141.207
3010.1.141.208/2810.1.141.209 – 10.1.141.22210.1.141.223
3110.1.141.224/2810.1.141.225 – 10.1.141.23810.1.141.239
3210.1.141.240/2810.1.141.241 – 10.1.141.25410.1.141.255
3310.1.142.0/2810.1.142.1 – 10.1.142.1410.1.142.15
3410.1.142.16/2810.1.142.17 – 10.1.142.3010.1.142.31
3510.1.142.32/2810.1.142.33 – 10.1.142.4610.1.142.47
3610.1.142.48/2810.1.142.49 – 10.1.142.6210.1.142.63
3710.1.142.64/2810.1.142.65 – 10.1.142.7810.1.142.79
3810.1.142.80/2810.1.142.81 – 10.1.142.9410.1.142.95
3910.1.142.96/2810.1.142.97 – 10.1.142.11010.1.142.111
4010.1.142.112/2810.1.142.113 – 10.1.142.12610.1.142.127
4110.1.142.128/2810.1.142.129 – 10.1.142.14210.1.142.143
4210.1.142.144/2810.1.142.145 – 10.1.142.15810.1.142.159
4310.1.142.160/2810.1.142.161 – 10.1.142.17410.1.142.175
4410.1.142.176/2810.1.142.177 – 10.1.142.19010.1.142.191
4510.1.142.192/2810.1.142.193 – 10.1.142.20610.1.142.207
4610.1.142.208/2810.1.142.209 – 10.1.142.22210.1.142.223
4710.1.142.224/2810.1.142.225 – 10.1.142.23810.1.142.239
4810.1.142.240/2810.1.142.241 – 10.1.142.25410.1.142.255
4910.1.143.0/2810.1.143.1 – 10.1.143.1410.1.143.15
5010.1.143.16/2810.1.143.17 – 10.1.143.3010.1.143.31
5110.1.143.32/2810.1.143.33 – 10.1.143.4610.1.143.47
5210.1.143.48/2810.1.143.49 – 10.1.143.6210.1.143.63
5310.1.143.64/2810.1.143.65 – 10.1.143.7810.1.143.79
5410.1.143.80/2810.1.143.81 – 10.1.143.9410.1.143.95
5510.1.143.96/2810.1.143.97 – 10.1.143.11010.1.143.111
5610.1.143.112/2810.1.143.113 – 10.1.143.12610.1.143.127
5710.1.143.128/2810.1.143.129 – 10.1.143.14210.1.143.143
5810.1.143.144/2810.1.143.145 – 10.1.143.15810.1.143.159
5910.1.143.160/2810.1.143.161 – 10.1.143.17410.1.143.175
6010.1.143.176/2810.1.143.177 – 10.1.143.19010.1.143.191
6110.1.143.192/2810.1.143.193 – 10.1.143.20610.1.143.207
6210.1.143.208/2810.1.143.209 – 10.1.143.22210.1.143.223
6310.1.143.224/2810.1.143.225 – 10.1.143.23810.1.143.239
6410.1.143.240/2810.1.143.241 – 10.1.143.25410.1.143.255
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 →