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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)10.2.208.0/22
network10.2.208.0/22
broadcast10.2.211.255
first host10.2.208.1
last host10.2.211.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.2.208.0/22
address00001010.00000010.11010000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000010.11010000.00000000
broadcast00001010.00000010.11010011.11111111
green = network part, grey = host part
hex0x0a02d000
decimal167956480
reverse dns0.208.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:d000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.2.208.0/2810.2.208.1 – 10.2.208.1410.2.208.15
210.2.208.16/2810.2.208.17 – 10.2.208.3010.2.208.31
310.2.208.32/2810.2.208.33 – 10.2.208.4610.2.208.47
410.2.208.48/2810.2.208.49 – 10.2.208.6210.2.208.63
510.2.208.64/2810.2.208.65 – 10.2.208.7810.2.208.79
610.2.208.80/2810.2.208.81 – 10.2.208.9410.2.208.95
710.2.208.96/2810.2.208.97 – 10.2.208.11010.2.208.111
810.2.208.112/2810.2.208.113 – 10.2.208.12610.2.208.127
910.2.208.128/2810.2.208.129 – 10.2.208.14210.2.208.143
1010.2.208.144/2810.2.208.145 – 10.2.208.15810.2.208.159
1110.2.208.160/2810.2.208.161 – 10.2.208.17410.2.208.175
1210.2.208.176/2810.2.208.177 – 10.2.208.19010.2.208.191
1310.2.208.192/2810.2.208.193 – 10.2.208.20610.2.208.207
1410.2.208.208/2810.2.208.209 – 10.2.208.22210.2.208.223
1510.2.208.224/2810.2.208.225 – 10.2.208.23810.2.208.239
1610.2.208.240/2810.2.208.241 – 10.2.208.25410.2.208.255
1710.2.209.0/2810.2.209.1 – 10.2.209.1410.2.209.15
1810.2.209.16/2810.2.209.17 – 10.2.209.3010.2.209.31
1910.2.209.32/2810.2.209.33 – 10.2.209.4610.2.209.47
2010.2.209.48/2810.2.209.49 – 10.2.209.6210.2.209.63
2110.2.209.64/2810.2.209.65 – 10.2.209.7810.2.209.79
2210.2.209.80/2810.2.209.81 – 10.2.209.9410.2.209.95
2310.2.209.96/2810.2.209.97 – 10.2.209.11010.2.209.111
2410.2.209.112/2810.2.209.113 – 10.2.209.12610.2.209.127
2510.2.209.128/2810.2.209.129 – 10.2.209.14210.2.209.143
2610.2.209.144/2810.2.209.145 – 10.2.209.15810.2.209.159
2710.2.209.160/2810.2.209.161 – 10.2.209.17410.2.209.175
2810.2.209.176/2810.2.209.177 – 10.2.209.19010.2.209.191
2910.2.209.192/2810.2.209.193 – 10.2.209.20610.2.209.207
3010.2.209.208/2810.2.209.209 – 10.2.209.22210.2.209.223
3110.2.209.224/2810.2.209.225 – 10.2.209.23810.2.209.239
3210.2.209.240/2810.2.209.241 – 10.2.209.25410.2.209.255
3310.2.210.0/2810.2.210.1 – 10.2.210.1410.2.210.15
3410.2.210.16/2810.2.210.17 – 10.2.210.3010.2.210.31
3510.2.210.32/2810.2.210.33 – 10.2.210.4610.2.210.47
3610.2.210.48/2810.2.210.49 – 10.2.210.6210.2.210.63
3710.2.210.64/2810.2.210.65 – 10.2.210.7810.2.210.79
3810.2.210.80/2810.2.210.81 – 10.2.210.9410.2.210.95
3910.2.210.96/2810.2.210.97 – 10.2.210.11010.2.210.111
4010.2.210.112/2810.2.210.113 – 10.2.210.12610.2.210.127
4110.2.210.128/2810.2.210.129 – 10.2.210.14210.2.210.143
4210.2.210.144/2810.2.210.145 – 10.2.210.15810.2.210.159
4310.2.210.160/2810.2.210.161 – 10.2.210.17410.2.210.175
4410.2.210.176/2810.2.210.177 – 10.2.210.19010.2.210.191
4510.2.210.192/2810.2.210.193 – 10.2.210.20610.2.210.207
4610.2.210.208/2810.2.210.209 – 10.2.210.22210.2.210.223
4710.2.210.224/2810.2.210.225 – 10.2.210.23810.2.210.239
4810.2.210.240/2810.2.210.241 – 10.2.210.25410.2.210.255
4910.2.211.0/2810.2.211.1 – 10.2.211.1410.2.211.15
5010.2.211.16/2810.2.211.17 – 10.2.211.3010.2.211.31
5110.2.211.32/2810.2.211.33 – 10.2.211.4610.2.211.47
5210.2.211.48/2810.2.211.49 – 10.2.211.6210.2.211.63
5310.2.211.64/2810.2.211.65 – 10.2.211.7810.2.211.79
5410.2.211.80/2810.2.211.81 – 10.2.211.9410.2.211.95
5510.2.211.96/2810.2.211.97 – 10.2.211.11010.2.211.111
5610.2.211.112/2810.2.211.113 – 10.2.211.12610.2.211.127
5710.2.211.128/2810.2.211.129 – 10.2.211.14210.2.211.143
5810.2.211.144/2810.2.211.145 – 10.2.211.15810.2.211.159
5910.2.211.160/2810.2.211.161 – 10.2.211.17410.2.211.175
6010.2.211.176/2810.2.211.177 – 10.2.211.19010.2.211.191
6110.2.211.192/2810.2.211.193 – 10.2.211.20610.2.211.207
6210.2.211.208/2810.2.211.209 – 10.2.211.22210.2.211.223
6310.2.211.224/2810.2.211.225 – 10.2.211.23810.2.211.239
6410.2.211.240/2810.2.211.241 – 10.2.211.25410.2.211.255
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 →