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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)10.3.212.0/22
network10.3.212.0/22
broadcast10.3.215.255
first host10.3.212.1
last host10.3.215.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.212.0/22
address00001010.00000011.11010100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.11010100.00000000
broadcast00001010.00000011.11010111.11111111
green = network part, grey = host part
hex0x0a03d400
decimal168023040
reverse dns0.212.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:d400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.212.0/2810.3.212.1 – 10.3.212.1410.3.212.15
210.3.212.16/2810.3.212.17 – 10.3.212.3010.3.212.31
310.3.212.32/2810.3.212.33 – 10.3.212.4610.3.212.47
410.3.212.48/2810.3.212.49 – 10.3.212.6210.3.212.63
510.3.212.64/2810.3.212.65 – 10.3.212.7810.3.212.79
610.3.212.80/2810.3.212.81 – 10.3.212.9410.3.212.95
710.3.212.96/2810.3.212.97 – 10.3.212.11010.3.212.111
810.3.212.112/2810.3.212.113 – 10.3.212.12610.3.212.127
910.3.212.128/2810.3.212.129 – 10.3.212.14210.3.212.143
1010.3.212.144/2810.3.212.145 – 10.3.212.15810.3.212.159
1110.3.212.160/2810.3.212.161 – 10.3.212.17410.3.212.175
1210.3.212.176/2810.3.212.177 – 10.3.212.19010.3.212.191
1310.3.212.192/2810.3.212.193 – 10.3.212.20610.3.212.207
1410.3.212.208/2810.3.212.209 – 10.3.212.22210.3.212.223
1510.3.212.224/2810.3.212.225 – 10.3.212.23810.3.212.239
1610.3.212.240/2810.3.212.241 – 10.3.212.25410.3.212.255
1710.3.213.0/2810.3.213.1 – 10.3.213.1410.3.213.15
1810.3.213.16/2810.3.213.17 – 10.3.213.3010.3.213.31
1910.3.213.32/2810.3.213.33 – 10.3.213.4610.3.213.47
2010.3.213.48/2810.3.213.49 – 10.3.213.6210.3.213.63
2110.3.213.64/2810.3.213.65 – 10.3.213.7810.3.213.79
2210.3.213.80/2810.3.213.81 – 10.3.213.9410.3.213.95
2310.3.213.96/2810.3.213.97 – 10.3.213.11010.3.213.111
2410.3.213.112/2810.3.213.113 – 10.3.213.12610.3.213.127
2510.3.213.128/2810.3.213.129 – 10.3.213.14210.3.213.143
2610.3.213.144/2810.3.213.145 – 10.3.213.15810.3.213.159
2710.3.213.160/2810.3.213.161 – 10.3.213.17410.3.213.175
2810.3.213.176/2810.3.213.177 – 10.3.213.19010.3.213.191
2910.3.213.192/2810.3.213.193 – 10.3.213.20610.3.213.207
3010.3.213.208/2810.3.213.209 – 10.3.213.22210.3.213.223
3110.3.213.224/2810.3.213.225 – 10.3.213.23810.3.213.239
3210.3.213.240/2810.3.213.241 – 10.3.213.25410.3.213.255
3310.3.214.0/2810.3.214.1 – 10.3.214.1410.3.214.15
3410.3.214.16/2810.3.214.17 – 10.3.214.3010.3.214.31
3510.3.214.32/2810.3.214.33 – 10.3.214.4610.3.214.47
3610.3.214.48/2810.3.214.49 – 10.3.214.6210.3.214.63
3710.3.214.64/2810.3.214.65 – 10.3.214.7810.3.214.79
3810.3.214.80/2810.3.214.81 – 10.3.214.9410.3.214.95
3910.3.214.96/2810.3.214.97 – 10.3.214.11010.3.214.111
4010.3.214.112/2810.3.214.113 – 10.3.214.12610.3.214.127
4110.3.214.128/2810.3.214.129 – 10.3.214.14210.3.214.143
4210.3.214.144/2810.3.214.145 – 10.3.214.15810.3.214.159
4310.3.214.160/2810.3.214.161 – 10.3.214.17410.3.214.175
4410.3.214.176/2810.3.214.177 – 10.3.214.19010.3.214.191
4510.3.214.192/2810.3.214.193 – 10.3.214.20610.3.214.207
4610.3.214.208/2810.3.214.209 – 10.3.214.22210.3.214.223
4710.3.214.224/2810.3.214.225 – 10.3.214.23810.3.214.239
4810.3.214.240/2810.3.214.241 – 10.3.214.25410.3.214.255
4910.3.215.0/2810.3.215.1 – 10.3.215.1410.3.215.15
5010.3.215.16/2810.3.215.17 – 10.3.215.3010.3.215.31
5110.3.215.32/2810.3.215.33 – 10.3.215.4610.3.215.47
5210.3.215.48/2810.3.215.49 – 10.3.215.6210.3.215.63
5310.3.215.64/2810.3.215.65 – 10.3.215.7810.3.215.79
5410.3.215.80/2810.3.215.81 – 10.3.215.9410.3.215.95
5510.3.215.96/2810.3.215.97 – 10.3.215.11010.3.215.111
5610.3.215.112/2810.3.215.113 – 10.3.215.12610.3.215.127
5710.3.215.128/2810.3.215.129 – 10.3.215.14210.3.215.143
5810.3.215.144/2810.3.215.145 – 10.3.215.15810.3.215.159
5910.3.215.160/2810.3.215.161 – 10.3.215.17410.3.215.175
6010.3.215.176/2810.3.215.177 – 10.3.215.19010.3.215.191
6110.3.215.192/2810.3.215.193 – 10.3.215.20610.3.215.207
6210.3.215.208/2810.3.215.209 – 10.3.215.22210.3.215.223
6310.3.215.224/2810.3.215.225 – 10.3.215.23810.3.215.239
6410.3.215.240/2810.3.215.241 – 10.3.215.25410.3.215.255
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 →