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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)10.78.216.0/22
network10.78.216.0/22
broadcast10.78.219.255
first host10.78.216.1
last host10.78.219.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.216.0/22
address00001010.01001110.11011000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.11011000.00000000
broadcast00001010.01001110.11011011.11111111
green = network part, grey = host part
hex0x0a4ed800
decimal172939264
reverse dns0.216.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:d800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.216.0/2810.78.216.1 – 10.78.216.1410.78.216.15
210.78.216.16/2810.78.216.17 – 10.78.216.3010.78.216.31
310.78.216.32/2810.78.216.33 – 10.78.216.4610.78.216.47
410.78.216.48/2810.78.216.49 – 10.78.216.6210.78.216.63
510.78.216.64/2810.78.216.65 – 10.78.216.7810.78.216.79
610.78.216.80/2810.78.216.81 – 10.78.216.9410.78.216.95
710.78.216.96/2810.78.216.97 – 10.78.216.11010.78.216.111
810.78.216.112/2810.78.216.113 – 10.78.216.12610.78.216.127
910.78.216.128/2810.78.216.129 – 10.78.216.14210.78.216.143
1010.78.216.144/2810.78.216.145 – 10.78.216.15810.78.216.159
1110.78.216.160/2810.78.216.161 – 10.78.216.17410.78.216.175
1210.78.216.176/2810.78.216.177 – 10.78.216.19010.78.216.191
1310.78.216.192/2810.78.216.193 – 10.78.216.20610.78.216.207
1410.78.216.208/2810.78.216.209 – 10.78.216.22210.78.216.223
1510.78.216.224/2810.78.216.225 – 10.78.216.23810.78.216.239
1610.78.216.240/2810.78.216.241 – 10.78.216.25410.78.216.255
1710.78.217.0/2810.78.217.1 – 10.78.217.1410.78.217.15
1810.78.217.16/2810.78.217.17 – 10.78.217.3010.78.217.31
1910.78.217.32/2810.78.217.33 – 10.78.217.4610.78.217.47
2010.78.217.48/2810.78.217.49 – 10.78.217.6210.78.217.63
2110.78.217.64/2810.78.217.65 – 10.78.217.7810.78.217.79
2210.78.217.80/2810.78.217.81 – 10.78.217.9410.78.217.95
2310.78.217.96/2810.78.217.97 – 10.78.217.11010.78.217.111
2410.78.217.112/2810.78.217.113 – 10.78.217.12610.78.217.127
2510.78.217.128/2810.78.217.129 – 10.78.217.14210.78.217.143
2610.78.217.144/2810.78.217.145 – 10.78.217.15810.78.217.159
2710.78.217.160/2810.78.217.161 – 10.78.217.17410.78.217.175
2810.78.217.176/2810.78.217.177 – 10.78.217.19010.78.217.191
2910.78.217.192/2810.78.217.193 – 10.78.217.20610.78.217.207
3010.78.217.208/2810.78.217.209 – 10.78.217.22210.78.217.223
3110.78.217.224/2810.78.217.225 – 10.78.217.23810.78.217.239
3210.78.217.240/2810.78.217.241 – 10.78.217.25410.78.217.255
3310.78.218.0/2810.78.218.1 – 10.78.218.1410.78.218.15
3410.78.218.16/2810.78.218.17 – 10.78.218.3010.78.218.31
3510.78.218.32/2810.78.218.33 – 10.78.218.4610.78.218.47
3610.78.218.48/2810.78.218.49 – 10.78.218.6210.78.218.63
3710.78.218.64/2810.78.218.65 – 10.78.218.7810.78.218.79
3810.78.218.80/2810.78.218.81 – 10.78.218.9410.78.218.95
3910.78.218.96/2810.78.218.97 – 10.78.218.11010.78.218.111
4010.78.218.112/2810.78.218.113 – 10.78.218.12610.78.218.127
4110.78.218.128/2810.78.218.129 – 10.78.218.14210.78.218.143
4210.78.218.144/2810.78.218.145 – 10.78.218.15810.78.218.159
4310.78.218.160/2810.78.218.161 – 10.78.218.17410.78.218.175
4410.78.218.176/2810.78.218.177 – 10.78.218.19010.78.218.191
4510.78.218.192/2810.78.218.193 – 10.78.218.20610.78.218.207
4610.78.218.208/2810.78.218.209 – 10.78.218.22210.78.218.223
4710.78.218.224/2810.78.218.225 – 10.78.218.23810.78.218.239
4810.78.218.240/2810.78.218.241 – 10.78.218.25410.78.218.255
4910.78.219.0/2810.78.219.1 – 10.78.219.1410.78.219.15
5010.78.219.16/2810.78.219.17 – 10.78.219.3010.78.219.31
5110.78.219.32/2810.78.219.33 – 10.78.219.4610.78.219.47
5210.78.219.48/2810.78.219.49 – 10.78.219.6210.78.219.63
5310.78.219.64/2810.78.219.65 – 10.78.219.7810.78.219.79
5410.78.219.80/2810.78.219.81 – 10.78.219.9410.78.219.95
5510.78.219.96/2810.78.219.97 – 10.78.219.11010.78.219.111
5610.78.219.112/2810.78.219.113 – 10.78.219.12610.78.219.127
5710.78.219.128/2810.78.219.129 – 10.78.219.14210.78.219.143
5810.78.219.144/2810.78.219.145 – 10.78.219.15810.78.219.159
5910.78.219.160/2810.78.219.161 – 10.78.219.17410.78.219.175
6010.78.219.176/2810.78.219.177 – 10.78.219.19010.78.219.191
6110.78.219.192/2810.78.219.193 – 10.78.219.20610.78.219.207
6210.78.219.208/2810.78.219.209 – 10.78.219.22210.78.219.223
6310.78.219.224/2810.78.219.225 – 10.78.219.23810.78.219.239
6410.78.219.240/2810.78.219.241 – 10.78.219.25410.78.219.255
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 →