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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)10.2.108.0/22
network10.2.108.0/22
broadcast10.2.111.255
first host10.2.108.1
last host10.2.111.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.2.108.0/22
address00001010.00000010.01101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000010.01101100.00000000
broadcast00001010.00000010.01101111.11111111
green = network part, grey = host part
hex0x0a026c00
decimal167930880
reverse dns0.108.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:6c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.108.0/2810.2.108.1 – 10.2.108.1410.2.108.15
210.2.108.16/2810.2.108.17 – 10.2.108.3010.2.108.31
310.2.108.32/2810.2.108.33 – 10.2.108.4610.2.108.47
410.2.108.48/2810.2.108.49 – 10.2.108.6210.2.108.63
510.2.108.64/2810.2.108.65 – 10.2.108.7810.2.108.79
610.2.108.80/2810.2.108.81 – 10.2.108.9410.2.108.95
710.2.108.96/2810.2.108.97 – 10.2.108.11010.2.108.111
810.2.108.112/2810.2.108.113 – 10.2.108.12610.2.108.127
910.2.108.128/2810.2.108.129 – 10.2.108.14210.2.108.143
1010.2.108.144/2810.2.108.145 – 10.2.108.15810.2.108.159
1110.2.108.160/2810.2.108.161 – 10.2.108.17410.2.108.175
1210.2.108.176/2810.2.108.177 – 10.2.108.19010.2.108.191
1310.2.108.192/2810.2.108.193 – 10.2.108.20610.2.108.207
1410.2.108.208/2810.2.108.209 – 10.2.108.22210.2.108.223
1510.2.108.224/2810.2.108.225 – 10.2.108.23810.2.108.239
1610.2.108.240/2810.2.108.241 – 10.2.108.25410.2.108.255
1710.2.109.0/2810.2.109.1 – 10.2.109.1410.2.109.15
1810.2.109.16/2810.2.109.17 – 10.2.109.3010.2.109.31
1910.2.109.32/2810.2.109.33 – 10.2.109.4610.2.109.47
2010.2.109.48/2810.2.109.49 – 10.2.109.6210.2.109.63
2110.2.109.64/2810.2.109.65 – 10.2.109.7810.2.109.79
2210.2.109.80/2810.2.109.81 – 10.2.109.9410.2.109.95
2310.2.109.96/2810.2.109.97 – 10.2.109.11010.2.109.111
2410.2.109.112/2810.2.109.113 – 10.2.109.12610.2.109.127
2510.2.109.128/2810.2.109.129 – 10.2.109.14210.2.109.143
2610.2.109.144/2810.2.109.145 – 10.2.109.15810.2.109.159
2710.2.109.160/2810.2.109.161 – 10.2.109.17410.2.109.175
2810.2.109.176/2810.2.109.177 – 10.2.109.19010.2.109.191
2910.2.109.192/2810.2.109.193 – 10.2.109.20610.2.109.207
3010.2.109.208/2810.2.109.209 – 10.2.109.22210.2.109.223
3110.2.109.224/2810.2.109.225 – 10.2.109.23810.2.109.239
3210.2.109.240/2810.2.109.241 – 10.2.109.25410.2.109.255
3310.2.110.0/2810.2.110.1 – 10.2.110.1410.2.110.15
3410.2.110.16/2810.2.110.17 – 10.2.110.3010.2.110.31
3510.2.110.32/2810.2.110.33 – 10.2.110.4610.2.110.47
3610.2.110.48/2810.2.110.49 – 10.2.110.6210.2.110.63
3710.2.110.64/2810.2.110.65 – 10.2.110.7810.2.110.79
3810.2.110.80/2810.2.110.81 – 10.2.110.9410.2.110.95
3910.2.110.96/2810.2.110.97 – 10.2.110.11010.2.110.111
4010.2.110.112/2810.2.110.113 – 10.2.110.12610.2.110.127
4110.2.110.128/2810.2.110.129 – 10.2.110.14210.2.110.143
4210.2.110.144/2810.2.110.145 – 10.2.110.15810.2.110.159
4310.2.110.160/2810.2.110.161 – 10.2.110.17410.2.110.175
4410.2.110.176/2810.2.110.177 – 10.2.110.19010.2.110.191
4510.2.110.192/2810.2.110.193 – 10.2.110.20610.2.110.207
4610.2.110.208/2810.2.110.209 – 10.2.110.22210.2.110.223
4710.2.110.224/2810.2.110.225 – 10.2.110.23810.2.110.239
4810.2.110.240/2810.2.110.241 – 10.2.110.25410.2.110.255
4910.2.111.0/2810.2.111.1 – 10.2.111.1410.2.111.15
5010.2.111.16/2810.2.111.17 – 10.2.111.3010.2.111.31
5110.2.111.32/2810.2.111.33 – 10.2.111.4610.2.111.47
5210.2.111.48/2810.2.111.49 – 10.2.111.6210.2.111.63
5310.2.111.64/2810.2.111.65 – 10.2.111.7810.2.111.79
5410.2.111.80/2810.2.111.81 – 10.2.111.9410.2.111.95
5510.2.111.96/2810.2.111.97 – 10.2.111.11010.2.111.111
5610.2.111.112/2810.2.111.113 – 10.2.111.12610.2.111.127
5710.2.111.128/2810.2.111.129 – 10.2.111.14210.2.111.143
5810.2.111.144/2810.2.111.145 – 10.2.111.15810.2.111.159
5910.2.111.160/2810.2.111.161 – 10.2.111.17410.2.111.175
6010.2.111.176/2810.2.111.177 – 10.2.111.19010.2.111.191
6110.2.111.192/2810.2.111.193 – 10.2.111.20610.2.111.207
6210.2.111.208/2810.2.111.209 – 10.2.111.22210.2.111.223
6310.2.111.224/2810.2.111.225 – 10.2.111.23810.2.111.239
6410.2.111.240/2810.2.111.241 – 10.2.111.25410.2.111.255
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 →