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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)10.78.204.0/22
network10.78.204.0/22
broadcast10.78.207.255
first host10.78.204.1
last host10.78.207.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.204.0/22
address00001010.01001110.11001100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.11001100.00000000
broadcast00001010.01001110.11001111.11111111
green = network part, grey = host part
hex0x0a4ecc00
decimal172936192
reverse dns0.204.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:cc00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.204.0/2810.78.204.1 – 10.78.204.1410.78.204.15
210.78.204.16/2810.78.204.17 – 10.78.204.3010.78.204.31
310.78.204.32/2810.78.204.33 – 10.78.204.4610.78.204.47
410.78.204.48/2810.78.204.49 – 10.78.204.6210.78.204.63
510.78.204.64/2810.78.204.65 – 10.78.204.7810.78.204.79
610.78.204.80/2810.78.204.81 – 10.78.204.9410.78.204.95
710.78.204.96/2810.78.204.97 – 10.78.204.11010.78.204.111
810.78.204.112/2810.78.204.113 – 10.78.204.12610.78.204.127
910.78.204.128/2810.78.204.129 – 10.78.204.14210.78.204.143
1010.78.204.144/2810.78.204.145 – 10.78.204.15810.78.204.159
1110.78.204.160/2810.78.204.161 – 10.78.204.17410.78.204.175
1210.78.204.176/2810.78.204.177 – 10.78.204.19010.78.204.191
1310.78.204.192/2810.78.204.193 – 10.78.204.20610.78.204.207
1410.78.204.208/2810.78.204.209 – 10.78.204.22210.78.204.223
1510.78.204.224/2810.78.204.225 – 10.78.204.23810.78.204.239
1610.78.204.240/2810.78.204.241 – 10.78.204.25410.78.204.255
1710.78.205.0/2810.78.205.1 – 10.78.205.1410.78.205.15
1810.78.205.16/2810.78.205.17 – 10.78.205.3010.78.205.31
1910.78.205.32/2810.78.205.33 – 10.78.205.4610.78.205.47
2010.78.205.48/2810.78.205.49 – 10.78.205.6210.78.205.63
2110.78.205.64/2810.78.205.65 – 10.78.205.7810.78.205.79
2210.78.205.80/2810.78.205.81 – 10.78.205.9410.78.205.95
2310.78.205.96/2810.78.205.97 – 10.78.205.11010.78.205.111
2410.78.205.112/2810.78.205.113 – 10.78.205.12610.78.205.127
2510.78.205.128/2810.78.205.129 – 10.78.205.14210.78.205.143
2610.78.205.144/2810.78.205.145 – 10.78.205.15810.78.205.159
2710.78.205.160/2810.78.205.161 – 10.78.205.17410.78.205.175
2810.78.205.176/2810.78.205.177 – 10.78.205.19010.78.205.191
2910.78.205.192/2810.78.205.193 – 10.78.205.20610.78.205.207
3010.78.205.208/2810.78.205.209 – 10.78.205.22210.78.205.223
3110.78.205.224/2810.78.205.225 – 10.78.205.23810.78.205.239
3210.78.205.240/2810.78.205.241 – 10.78.205.25410.78.205.255
3310.78.206.0/2810.78.206.1 – 10.78.206.1410.78.206.15
3410.78.206.16/2810.78.206.17 – 10.78.206.3010.78.206.31
3510.78.206.32/2810.78.206.33 – 10.78.206.4610.78.206.47
3610.78.206.48/2810.78.206.49 – 10.78.206.6210.78.206.63
3710.78.206.64/2810.78.206.65 – 10.78.206.7810.78.206.79
3810.78.206.80/2810.78.206.81 – 10.78.206.9410.78.206.95
3910.78.206.96/2810.78.206.97 – 10.78.206.11010.78.206.111
4010.78.206.112/2810.78.206.113 – 10.78.206.12610.78.206.127
4110.78.206.128/2810.78.206.129 – 10.78.206.14210.78.206.143
4210.78.206.144/2810.78.206.145 – 10.78.206.15810.78.206.159
4310.78.206.160/2810.78.206.161 – 10.78.206.17410.78.206.175
4410.78.206.176/2810.78.206.177 – 10.78.206.19010.78.206.191
4510.78.206.192/2810.78.206.193 – 10.78.206.20610.78.206.207
4610.78.206.208/2810.78.206.209 – 10.78.206.22210.78.206.223
4710.78.206.224/2810.78.206.225 – 10.78.206.23810.78.206.239
4810.78.206.240/2810.78.206.241 – 10.78.206.25410.78.206.255
4910.78.207.0/2810.78.207.1 – 10.78.207.1410.78.207.15
5010.78.207.16/2810.78.207.17 – 10.78.207.3010.78.207.31
5110.78.207.32/2810.78.207.33 – 10.78.207.4610.78.207.47
5210.78.207.48/2810.78.207.49 – 10.78.207.6210.78.207.63
5310.78.207.64/2810.78.207.65 – 10.78.207.7810.78.207.79
5410.78.207.80/2810.78.207.81 – 10.78.207.9410.78.207.95
5510.78.207.96/2810.78.207.97 – 10.78.207.11010.78.207.111
5610.78.207.112/2810.78.207.113 – 10.78.207.12610.78.207.127
5710.78.207.128/2810.78.207.129 – 10.78.207.14210.78.207.143
5810.78.207.144/2810.78.207.145 – 10.78.207.15810.78.207.159
5910.78.207.160/2810.78.207.161 – 10.78.207.17410.78.207.175
6010.78.207.176/2810.78.207.177 – 10.78.207.19010.78.207.191
6110.78.207.192/2810.78.207.193 – 10.78.207.20610.78.207.207
6210.78.207.208/2810.78.207.209 – 10.78.207.22210.78.207.223
6310.78.207.224/2810.78.207.225 – 10.78.207.23810.78.207.239
6410.78.207.240/2810.78.207.241 – 10.78.207.25410.78.207.255
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 →