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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)10.78.220.0/22
network10.78.220.0/22
broadcast10.78.223.255
first host10.78.220.1
last host10.78.223.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.220.0/22
address00001010.01001110.11011100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.11011100.00000000
broadcast00001010.01001110.11011111.11111111
green = network part, grey = host part
hex0x0a4edc00
decimal172940288
reverse dns0.220.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:dc00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.220.0/2810.78.220.1 – 10.78.220.1410.78.220.15
210.78.220.16/2810.78.220.17 – 10.78.220.3010.78.220.31
310.78.220.32/2810.78.220.33 – 10.78.220.4610.78.220.47
410.78.220.48/2810.78.220.49 – 10.78.220.6210.78.220.63
510.78.220.64/2810.78.220.65 – 10.78.220.7810.78.220.79
610.78.220.80/2810.78.220.81 – 10.78.220.9410.78.220.95
710.78.220.96/2810.78.220.97 – 10.78.220.11010.78.220.111
810.78.220.112/2810.78.220.113 – 10.78.220.12610.78.220.127
910.78.220.128/2810.78.220.129 – 10.78.220.14210.78.220.143
1010.78.220.144/2810.78.220.145 – 10.78.220.15810.78.220.159
1110.78.220.160/2810.78.220.161 – 10.78.220.17410.78.220.175
1210.78.220.176/2810.78.220.177 – 10.78.220.19010.78.220.191
1310.78.220.192/2810.78.220.193 – 10.78.220.20610.78.220.207
1410.78.220.208/2810.78.220.209 – 10.78.220.22210.78.220.223
1510.78.220.224/2810.78.220.225 – 10.78.220.23810.78.220.239
1610.78.220.240/2810.78.220.241 – 10.78.220.25410.78.220.255
1710.78.221.0/2810.78.221.1 – 10.78.221.1410.78.221.15
1810.78.221.16/2810.78.221.17 – 10.78.221.3010.78.221.31
1910.78.221.32/2810.78.221.33 – 10.78.221.4610.78.221.47
2010.78.221.48/2810.78.221.49 – 10.78.221.6210.78.221.63
2110.78.221.64/2810.78.221.65 – 10.78.221.7810.78.221.79
2210.78.221.80/2810.78.221.81 – 10.78.221.9410.78.221.95
2310.78.221.96/2810.78.221.97 – 10.78.221.11010.78.221.111
2410.78.221.112/2810.78.221.113 – 10.78.221.12610.78.221.127
2510.78.221.128/2810.78.221.129 – 10.78.221.14210.78.221.143
2610.78.221.144/2810.78.221.145 – 10.78.221.15810.78.221.159
2710.78.221.160/2810.78.221.161 – 10.78.221.17410.78.221.175
2810.78.221.176/2810.78.221.177 – 10.78.221.19010.78.221.191
2910.78.221.192/2810.78.221.193 – 10.78.221.20610.78.221.207
3010.78.221.208/2810.78.221.209 – 10.78.221.22210.78.221.223
3110.78.221.224/2810.78.221.225 – 10.78.221.23810.78.221.239
3210.78.221.240/2810.78.221.241 – 10.78.221.25410.78.221.255
3310.78.222.0/2810.78.222.1 – 10.78.222.1410.78.222.15
3410.78.222.16/2810.78.222.17 – 10.78.222.3010.78.222.31
3510.78.222.32/2810.78.222.33 – 10.78.222.4610.78.222.47
3610.78.222.48/2810.78.222.49 – 10.78.222.6210.78.222.63
3710.78.222.64/2810.78.222.65 – 10.78.222.7810.78.222.79
3810.78.222.80/2810.78.222.81 – 10.78.222.9410.78.222.95
3910.78.222.96/2810.78.222.97 – 10.78.222.11010.78.222.111
4010.78.222.112/2810.78.222.113 – 10.78.222.12610.78.222.127
4110.78.222.128/2810.78.222.129 – 10.78.222.14210.78.222.143
4210.78.222.144/2810.78.222.145 – 10.78.222.15810.78.222.159
4310.78.222.160/2810.78.222.161 – 10.78.222.17410.78.222.175
4410.78.222.176/2810.78.222.177 – 10.78.222.19010.78.222.191
4510.78.222.192/2810.78.222.193 – 10.78.222.20610.78.222.207
4610.78.222.208/2810.78.222.209 – 10.78.222.22210.78.222.223
4710.78.222.224/2810.78.222.225 – 10.78.222.23810.78.222.239
4810.78.222.240/2810.78.222.241 – 10.78.222.25410.78.222.255
4910.78.223.0/2810.78.223.1 – 10.78.223.1410.78.223.15
5010.78.223.16/2810.78.223.17 – 10.78.223.3010.78.223.31
5110.78.223.32/2810.78.223.33 – 10.78.223.4610.78.223.47
5210.78.223.48/2810.78.223.49 – 10.78.223.6210.78.223.63
5310.78.223.64/2810.78.223.65 – 10.78.223.7810.78.223.79
5410.78.223.80/2810.78.223.81 – 10.78.223.9410.78.223.95
5510.78.223.96/2810.78.223.97 – 10.78.223.11010.78.223.111
5610.78.223.112/2810.78.223.113 – 10.78.223.12610.78.223.127
5710.78.223.128/2810.78.223.129 – 10.78.223.14210.78.223.143
5810.78.223.144/2810.78.223.145 – 10.78.223.15810.78.223.159
5910.78.223.160/2810.78.223.161 – 10.78.223.17410.78.223.175
6010.78.223.176/2810.78.223.177 – 10.78.223.19010.78.223.191
6110.78.223.192/2810.78.223.193 – 10.78.223.20610.78.223.207
6210.78.223.208/2810.78.223.209 – 10.78.223.22210.78.223.223
6310.78.223.224/2810.78.223.225 – 10.78.223.23810.78.223.239
6410.78.223.240/2810.78.223.241 – 10.78.223.25410.78.223.255
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 →