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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)10.3.224.0/22
network10.3.224.0/22
broadcast10.3.227.255
first host10.3.224.1
last host10.3.227.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.224.0/22
address00001010.00000011.11100000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.11100000.00000000
broadcast00001010.00000011.11100011.11111111
green = network part, grey = host part
hex0x0a03e000
decimal168026112
reverse dns0.224.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:e000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.224.0/2810.3.224.1 – 10.3.224.1410.3.224.15
210.3.224.16/2810.3.224.17 – 10.3.224.3010.3.224.31
310.3.224.32/2810.3.224.33 – 10.3.224.4610.3.224.47
410.3.224.48/2810.3.224.49 – 10.3.224.6210.3.224.63
510.3.224.64/2810.3.224.65 – 10.3.224.7810.3.224.79
610.3.224.80/2810.3.224.81 – 10.3.224.9410.3.224.95
710.3.224.96/2810.3.224.97 – 10.3.224.11010.3.224.111
810.3.224.112/2810.3.224.113 – 10.3.224.12610.3.224.127
910.3.224.128/2810.3.224.129 – 10.3.224.14210.3.224.143
1010.3.224.144/2810.3.224.145 – 10.3.224.15810.3.224.159
1110.3.224.160/2810.3.224.161 – 10.3.224.17410.3.224.175
1210.3.224.176/2810.3.224.177 – 10.3.224.19010.3.224.191
1310.3.224.192/2810.3.224.193 – 10.3.224.20610.3.224.207
1410.3.224.208/2810.3.224.209 – 10.3.224.22210.3.224.223
1510.3.224.224/2810.3.224.225 – 10.3.224.23810.3.224.239
1610.3.224.240/2810.3.224.241 – 10.3.224.25410.3.224.255
1710.3.225.0/2810.3.225.1 – 10.3.225.1410.3.225.15
1810.3.225.16/2810.3.225.17 – 10.3.225.3010.3.225.31
1910.3.225.32/2810.3.225.33 – 10.3.225.4610.3.225.47
2010.3.225.48/2810.3.225.49 – 10.3.225.6210.3.225.63
2110.3.225.64/2810.3.225.65 – 10.3.225.7810.3.225.79
2210.3.225.80/2810.3.225.81 – 10.3.225.9410.3.225.95
2310.3.225.96/2810.3.225.97 – 10.3.225.11010.3.225.111
2410.3.225.112/2810.3.225.113 – 10.3.225.12610.3.225.127
2510.3.225.128/2810.3.225.129 – 10.3.225.14210.3.225.143
2610.3.225.144/2810.3.225.145 – 10.3.225.15810.3.225.159
2710.3.225.160/2810.3.225.161 – 10.3.225.17410.3.225.175
2810.3.225.176/2810.3.225.177 – 10.3.225.19010.3.225.191
2910.3.225.192/2810.3.225.193 – 10.3.225.20610.3.225.207
3010.3.225.208/2810.3.225.209 – 10.3.225.22210.3.225.223
3110.3.225.224/2810.3.225.225 – 10.3.225.23810.3.225.239
3210.3.225.240/2810.3.225.241 – 10.3.225.25410.3.225.255
3310.3.226.0/2810.3.226.1 – 10.3.226.1410.3.226.15
3410.3.226.16/2810.3.226.17 – 10.3.226.3010.3.226.31
3510.3.226.32/2810.3.226.33 – 10.3.226.4610.3.226.47
3610.3.226.48/2810.3.226.49 – 10.3.226.6210.3.226.63
3710.3.226.64/2810.3.226.65 – 10.3.226.7810.3.226.79
3810.3.226.80/2810.3.226.81 – 10.3.226.9410.3.226.95
3910.3.226.96/2810.3.226.97 – 10.3.226.11010.3.226.111
4010.3.226.112/2810.3.226.113 – 10.3.226.12610.3.226.127
4110.3.226.128/2810.3.226.129 – 10.3.226.14210.3.226.143
4210.3.226.144/2810.3.226.145 – 10.3.226.15810.3.226.159
4310.3.226.160/2810.3.226.161 – 10.3.226.17410.3.226.175
4410.3.226.176/2810.3.226.177 – 10.3.226.19010.3.226.191
4510.3.226.192/2810.3.226.193 – 10.3.226.20610.3.226.207
4610.3.226.208/2810.3.226.209 – 10.3.226.22210.3.226.223
4710.3.226.224/2810.3.226.225 – 10.3.226.23810.3.226.239
4810.3.226.240/2810.3.226.241 – 10.3.226.25410.3.226.255
4910.3.227.0/2810.3.227.1 – 10.3.227.1410.3.227.15
5010.3.227.16/2810.3.227.17 – 10.3.227.3010.3.227.31
5110.3.227.32/2810.3.227.33 – 10.3.227.4610.3.227.47
5210.3.227.48/2810.3.227.49 – 10.3.227.6210.3.227.63
5310.3.227.64/2810.3.227.65 – 10.3.227.7810.3.227.79
5410.3.227.80/2810.3.227.81 – 10.3.227.9410.3.227.95
5510.3.227.96/2810.3.227.97 – 10.3.227.11010.3.227.111
5610.3.227.112/2810.3.227.113 – 10.3.227.12610.3.227.127
5710.3.227.128/2810.3.227.129 – 10.3.227.14210.3.227.143
5810.3.227.144/2810.3.227.145 – 10.3.227.15810.3.227.159
5910.3.227.160/2810.3.227.161 – 10.3.227.17410.3.227.175
6010.3.227.176/2810.3.227.177 – 10.3.227.19010.3.227.191
6110.3.227.192/2810.3.227.193 – 10.3.227.20610.3.227.207
6210.3.227.208/2810.3.227.209 – 10.3.227.22210.3.227.223
6310.3.227.224/2810.3.227.225 – 10.3.227.23810.3.227.239
6410.3.227.240/2810.3.227.241 – 10.3.227.25410.3.227.255
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 →