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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)10.78.104.0/22
network10.78.104.0/22
broadcast10.78.107.255
first host10.78.104.1
last host10.78.107.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.104.0/22
address00001010.01001110.01101000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.01101000.00000000
broadcast00001010.01001110.01101011.11111111
green = network part, grey = host part
hex0x0a4e6800
decimal172910592
reverse dns0.104.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:6800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.104.0/2810.78.104.1 – 10.78.104.1410.78.104.15
210.78.104.16/2810.78.104.17 – 10.78.104.3010.78.104.31
310.78.104.32/2810.78.104.33 – 10.78.104.4610.78.104.47
410.78.104.48/2810.78.104.49 – 10.78.104.6210.78.104.63
510.78.104.64/2810.78.104.65 – 10.78.104.7810.78.104.79
610.78.104.80/2810.78.104.81 – 10.78.104.9410.78.104.95
710.78.104.96/2810.78.104.97 – 10.78.104.11010.78.104.111
810.78.104.112/2810.78.104.113 – 10.78.104.12610.78.104.127
910.78.104.128/2810.78.104.129 – 10.78.104.14210.78.104.143
1010.78.104.144/2810.78.104.145 – 10.78.104.15810.78.104.159
1110.78.104.160/2810.78.104.161 – 10.78.104.17410.78.104.175
1210.78.104.176/2810.78.104.177 – 10.78.104.19010.78.104.191
1310.78.104.192/2810.78.104.193 – 10.78.104.20610.78.104.207
1410.78.104.208/2810.78.104.209 – 10.78.104.22210.78.104.223
1510.78.104.224/2810.78.104.225 – 10.78.104.23810.78.104.239
1610.78.104.240/2810.78.104.241 – 10.78.104.25410.78.104.255
1710.78.105.0/2810.78.105.1 – 10.78.105.1410.78.105.15
1810.78.105.16/2810.78.105.17 – 10.78.105.3010.78.105.31
1910.78.105.32/2810.78.105.33 – 10.78.105.4610.78.105.47
2010.78.105.48/2810.78.105.49 – 10.78.105.6210.78.105.63
2110.78.105.64/2810.78.105.65 – 10.78.105.7810.78.105.79
2210.78.105.80/2810.78.105.81 – 10.78.105.9410.78.105.95
2310.78.105.96/2810.78.105.97 – 10.78.105.11010.78.105.111
2410.78.105.112/2810.78.105.113 – 10.78.105.12610.78.105.127
2510.78.105.128/2810.78.105.129 – 10.78.105.14210.78.105.143
2610.78.105.144/2810.78.105.145 – 10.78.105.15810.78.105.159
2710.78.105.160/2810.78.105.161 – 10.78.105.17410.78.105.175
2810.78.105.176/2810.78.105.177 – 10.78.105.19010.78.105.191
2910.78.105.192/2810.78.105.193 – 10.78.105.20610.78.105.207
3010.78.105.208/2810.78.105.209 – 10.78.105.22210.78.105.223
3110.78.105.224/2810.78.105.225 – 10.78.105.23810.78.105.239
3210.78.105.240/2810.78.105.241 – 10.78.105.25410.78.105.255
3310.78.106.0/2810.78.106.1 – 10.78.106.1410.78.106.15
3410.78.106.16/2810.78.106.17 – 10.78.106.3010.78.106.31
3510.78.106.32/2810.78.106.33 – 10.78.106.4610.78.106.47
3610.78.106.48/2810.78.106.49 – 10.78.106.6210.78.106.63
3710.78.106.64/2810.78.106.65 – 10.78.106.7810.78.106.79
3810.78.106.80/2810.78.106.81 – 10.78.106.9410.78.106.95
3910.78.106.96/2810.78.106.97 – 10.78.106.11010.78.106.111
4010.78.106.112/2810.78.106.113 – 10.78.106.12610.78.106.127
4110.78.106.128/2810.78.106.129 – 10.78.106.14210.78.106.143
4210.78.106.144/2810.78.106.145 – 10.78.106.15810.78.106.159
4310.78.106.160/2810.78.106.161 – 10.78.106.17410.78.106.175
4410.78.106.176/2810.78.106.177 – 10.78.106.19010.78.106.191
4510.78.106.192/2810.78.106.193 – 10.78.106.20610.78.106.207
4610.78.106.208/2810.78.106.209 – 10.78.106.22210.78.106.223
4710.78.106.224/2810.78.106.225 – 10.78.106.23810.78.106.239
4810.78.106.240/2810.78.106.241 – 10.78.106.25410.78.106.255
4910.78.107.0/2810.78.107.1 – 10.78.107.1410.78.107.15
5010.78.107.16/2810.78.107.17 – 10.78.107.3010.78.107.31
5110.78.107.32/2810.78.107.33 – 10.78.107.4610.78.107.47
5210.78.107.48/2810.78.107.49 – 10.78.107.6210.78.107.63
5310.78.107.64/2810.78.107.65 – 10.78.107.7810.78.107.79
5410.78.107.80/2810.78.107.81 – 10.78.107.9410.78.107.95
5510.78.107.96/2810.78.107.97 – 10.78.107.11010.78.107.111
5610.78.107.112/2810.78.107.113 – 10.78.107.12610.78.107.127
5710.78.107.128/2810.78.107.129 – 10.78.107.14210.78.107.143
5810.78.107.144/2810.78.107.145 – 10.78.107.15810.78.107.159
5910.78.107.160/2810.78.107.161 – 10.78.107.17410.78.107.175
6010.78.107.176/2810.78.107.177 – 10.78.107.19010.78.107.191
6110.78.107.192/2810.78.107.193 – 10.78.107.20610.78.107.207
6210.78.107.208/2810.78.107.209 – 10.78.107.22210.78.107.223
6310.78.107.224/2810.78.107.225 – 10.78.107.23810.78.107.239
6410.78.107.240/2810.78.107.241 – 10.78.107.25410.78.107.255
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 →