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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)10.2.212.0/22
network10.2.212.0/22
broadcast10.2.215.255
first host10.2.212.1
last host10.2.215.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.2.212.0/22
address00001010.00000010.11010100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000010.11010100.00000000
broadcast00001010.00000010.11010111.11111111
green = network part, grey = host part
hex0x0a02d400
decimal167957504
reverse dns0.212.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:d400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.212.0/2810.2.212.1 – 10.2.212.1410.2.212.15
210.2.212.16/2810.2.212.17 – 10.2.212.3010.2.212.31
310.2.212.32/2810.2.212.33 – 10.2.212.4610.2.212.47
410.2.212.48/2810.2.212.49 – 10.2.212.6210.2.212.63
510.2.212.64/2810.2.212.65 – 10.2.212.7810.2.212.79
610.2.212.80/2810.2.212.81 – 10.2.212.9410.2.212.95
710.2.212.96/2810.2.212.97 – 10.2.212.11010.2.212.111
810.2.212.112/2810.2.212.113 – 10.2.212.12610.2.212.127
910.2.212.128/2810.2.212.129 – 10.2.212.14210.2.212.143
1010.2.212.144/2810.2.212.145 – 10.2.212.15810.2.212.159
1110.2.212.160/2810.2.212.161 – 10.2.212.17410.2.212.175
1210.2.212.176/2810.2.212.177 – 10.2.212.19010.2.212.191
1310.2.212.192/2810.2.212.193 – 10.2.212.20610.2.212.207
1410.2.212.208/2810.2.212.209 – 10.2.212.22210.2.212.223
1510.2.212.224/2810.2.212.225 – 10.2.212.23810.2.212.239
1610.2.212.240/2810.2.212.241 – 10.2.212.25410.2.212.255
1710.2.213.0/2810.2.213.1 – 10.2.213.1410.2.213.15
1810.2.213.16/2810.2.213.17 – 10.2.213.3010.2.213.31
1910.2.213.32/2810.2.213.33 – 10.2.213.4610.2.213.47
2010.2.213.48/2810.2.213.49 – 10.2.213.6210.2.213.63
2110.2.213.64/2810.2.213.65 – 10.2.213.7810.2.213.79
2210.2.213.80/2810.2.213.81 – 10.2.213.9410.2.213.95
2310.2.213.96/2810.2.213.97 – 10.2.213.11010.2.213.111
2410.2.213.112/2810.2.213.113 – 10.2.213.12610.2.213.127
2510.2.213.128/2810.2.213.129 – 10.2.213.14210.2.213.143
2610.2.213.144/2810.2.213.145 – 10.2.213.15810.2.213.159
2710.2.213.160/2810.2.213.161 – 10.2.213.17410.2.213.175
2810.2.213.176/2810.2.213.177 – 10.2.213.19010.2.213.191
2910.2.213.192/2810.2.213.193 – 10.2.213.20610.2.213.207
3010.2.213.208/2810.2.213.209 – 10.2.213.22210.2.213.223
3110.2.213.224/2810.2.213.225 – 10.2.213.23810.2.213.239
3210.2.213.240/2810.2.213.241 – 10.2.213.25410.2.213.255
3310.2.214.0/2810.2.214.1 – 10.2.214.1410.2.214.15
3410.2.214.16/2810.2.214.17 – 10.2.214.3010.2.214.31
3510.2.214.32/2810.2.214.33 – 10.2.214.4610.2.214.47
3610.2.214.48/2810.2.214.49 – 10.2.214.6210.2.214.63
3710.2.214.64/2810.2.214.65 – 10.2.214.7810.2.214.79
3810.2.214.80/2810.2.214.81 – 10.2.214.9410.2.214.95
3910.2.214.96/2810.2.214.97 – 10.2.214.11010.2.214.111
4010.2.214.112/2810.2.214.113 – 10.2.214.12610.2.214.127
4110.2.214.128/2810.2.214.129 – 10.2.214.14210.2.214.143
4210.2.214.144/2810.2.214.145 – 10.2.214.15810.2.214.159
4310.2.214.160/2810.2.214.161 – 10.2.214.17410.2.214.175
4410.2.214.176/2810.2.214.177 – 10.2.214.19010.2.214.191
4510.2.214.192/2810.2.214.193 – 10.2.214.20610.2.214.207
4610.2.214.208/2810.2.214.209 – 10.2.214.22210.2.214.223
4710.2.214.224/2810.2.214.225 – 10.2.214.23810.2.214.239
4810.2.214.240/2810.2.214.241 – 10.2.214.25410.2.214.255
4910.2.215.0/2810.2.215.1 – 10.2.215.1410.2.215.15
5010.2.215.16/2810.2.215.17 – 10.2.215.3010.2.215.31
5110.2.215.32/2810.2.215.33 – 10.2.215.4610.2.215.47
5210.2.215.48/2810.2.215.49 – 10.2.215.6210.2.215.63
5310.2.215.64/2810.2.215.65 – 10.2.215.7810.2.215.79
5410.2.215.80/2810.2.215.81 – 10.2.215.9410.2.215.95
5510.2.215.96/2810.2.215.97 – 10.2.215.11010.2.215.111
5610.2.215.112/2810.2.215.113 – 10.2.215.12610.2.215.127
5710.2.215.128/2810.2.215.129 – 10.2.215.14210.2.215.143
5810.2.215.144/2810.2.215.145 – 10.2.215.15810.2.215.159
5910.2.215.160/2810.2.215.161 – 10.2.215.17410.2.215.175
6010.2.215.176/2810.2.215.177 – 10.2.215.19010.2.215.191
6110.2.215.192/2810.2.215.193 – 10.2.215.20610.2.215.207
6210.2.215.208/2810.2.215.209 – 10.2.215.22210.2.215.223
6310.2.215.224/2810.2.215.225 – 10.2.215.23810.2.215.239
6410.2.215.240/2810.2.215.241 – 10.2.215.25410.2.215.255
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 →