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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)10.78.128.0/22
network10.78.128.0/22
broadcast10.78.131.255
first host10.78.128.1
last host10.78.131.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.128.0/22
address00001010.01001110.10000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.10000000.00000000
broadcast00001010.01001110.10000011.11111111
green = network part, grey = host part
hex0x0a4e8000
decimal172916736
reverse dns0.128.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:8000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.128.0/2810.78.128.1 – 10.78.128.1410.78.128.15
210.78.128.16/2810.78.128.17 – 10.78.128.3010.78.128.31
310.78.128.32/2810.78.128.33 – 10.78.128.4610.78.128.47
410.78.128.48/2810.78.128.49 – 10.78.128.6210.78.128.63
510.78.128.64/2810.78.128.65 – 10.78.128.7810.78.128.79
610.78.128.80/2810.78.128.81 – 10.78.128.9410.78.128.95
710.78.128.96/2810.78.128.97 – 10.78.128.11010.78.128.111
810.78.128.112/2810.78.128.113 – 10.78.128.12610.78.128.127
910.78.128.128/2810.78.128.129 – 10.78.128.14210.78.128.143
1010.78.128.144/2810.78.128.145 – 10.78.128.15810.78.128.159
1110.78.128.160/2810.78.128.161 – 10.78.128.17410.78.128.175
1210.78.128.176/2810.78.128.177 – 10.78.128.19010.78.128.191
1310.78.128.192/2810.78.128.193 – 10.78.128.20610.78.128.207
1410.78.128.208/2810.78.128.209 – 10.78.128.22210.78.128.223
1510.78.128.224/2810.78.128.225 – 10.78.128.23810.78.128.239
1610.78.128.240/2810.78.128.241 – 10.78.128.25410.78.128.255
1710.78.129.0/2810.78.129.1 – 10.78.129.1410.78.129.15
1810.78.129.16/2810.78.129.17 – 10.78.129.3010.78.129.31
1910.78.129.32/2810.78.129.33 – 10.78.129.4610.78.129.47
2010.78.129.48/2810.78.129.49 – 10.78.129.6210.78.129.63
2110.78.129.64/2810.78.129.65 – 10.78.129.7810.78.129.79
2210.78.129.80/2810.78.129.81 – 10.78.129.9410.78.129.95
2310.78.129.96/2810.78.129.97 – 10.78.129.11010.78.129.111
2410.78.129.112/2810.78.129.113 – 10.78.129.12610.78.129.127
2510.78.129.128/2810.78.129.129 – 10.78.129.14210.78.129.143
2610.78.129.144/2810.78.129.145 – 10.78.129.15810.78.129.159
2710.78.129.160/2810.78.129.161 – 10.78.129.17410.78.129.175
2810.78.129.176/2810.78.129.177 – 10.78.129.19010.78.129.191
2910.78.129.192/2810.78.129.193 – 10.78.129.20610.78.129.207
3010.78.129.208/2810.78.129.209 – 10.78.129.22210.78.129.223
3110.78.129.224/2810.78.129.225 – 10.78.129.23810.78.129.239
3210.78.129.240/2810.78.129.241 – 10.78.129.25410.78.129.255
3310.78.130.0/2810.78.130.1 – 10.78.130.1410.78.130.15
3410.78.130.16/2810.78.130.17 – 10.78.130.3010.78.130.31
3510.78.130.32/2810.78.130.33 – 10.78.130.4610.78.130.47
3610.78.130.48/2810.78.130.49 – 10.78.130.6210.78.130.63
3710.78.130.64/2810.78.130.65 – 10.78.130.7810.78.130.79
3810.78.130.80/2810.78.130.81 – 10.78.130.9410.78.130.95
3910.78.130.96/2810.78.130.97 – 10.78.130.11010.78.130.111
4010.78.130.112/2810.78.130.113 – 10.78.130.12610.78.130.127
4110.78.130.128/2810.78.130.129 – 10.78.130.14210.78.130.143
4210.78.130.144/2810.78.130.145 – 10.78.130.15810.78.130.159
4310.78.130.160/2810.78.130.161 – 10.78.130.17410.78.130.175
4410.78.130.176/2810.78.130.177 – 10.78.130.19010.78.130.191
4510.78.130.192/2810.78.130.193 – 10.78.130.20610.78.130.207
4610.78.130.208/2810.78.130.209 – 10.78.130.22210.78.130.223
4710.78.130.224/2810.78.130.225 – 10.78.130.23810.78.130.239
4810.78.130.240/2810.78.130.241 – 10.78.130.25410.78.130.255
4910.78.131.0/2810.78.131.1 – 10.78.131.1410.78.131.15
5010.78.131.16/2810.78.131.17 – 10.78.131.3010.78.131.31
5110.78.131.32/2810.78.131.33 – 10.78.131.4610.78.131.47
5210.78.131.48/2810.78.131.49 – 10.78.131.6210.78.131.63
5310.78.131.64/2810.78.131.65 – 10.78.131.7810.78.131.79
5410.78.131.80/2810.78.131.81 – 10.78.131.9410.78.131.95
5510.78.131.96/2810.78.131.97 – 10.78.131.11010.78.131.111
5610.78.131.112/2810.78.131.113 – 10.78.131.12610.78.131.127
5710.78.131.128/2810.78.131.129 – 10.78.131.14210.78.131.143
5810.78.131.144/2810.78.131.145 – 10.78.131.15810.78.131.159
5910.78.131.160/2810.78.131.161 – 10.78.131.17410.78.131.175
6010.78.131.176/2810.78.131.177 – 10.78.131.19010.78.131.191
6110.78.131.192/2810.78.131.193 – 10.78.131.20610.78.131.207
6210.78.131.208/2810.78.131.209 – 10.78.131.22210.78.131.223
6310.78.131.224/2810.78.131.225 – 10.78.131.23810.78.131.239
6410.78.131.240/2810.78.131.241 – 10.78.131.25410.78.131.255
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 →