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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)10.3.228.0/22
network10.3.228.0/22
broadcast10.3.231.255
first host10.3.228.1
last host10.3.231.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.228.0/22
address00001010.00000011.11100100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.11100100.00000000
broadcast00001010.00000011.11100111.11111111
green = network part, grey = host part
hex0x0a03e400
decimal168027136
reverse dns0.228.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:e400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.228.0/2810.3.228.1 – 10.3.228.1410.3.228.15
210.3.228.16/2810.3.228.17 – 10.3.228.3010.3.228.31
310.3.228.32/2810.3.228.33 – 10.3.228.4610.3.228.47
410.3.228.48/2810.3.228.49 – 10.3.228.6210.3.228.63
510.3.228.64/2810.3.228.65 – 10.3.228.7810.3.228.79
610.3.228.80/2810.3.228.81 – 10.3.228.9410.3.228.95
710.3.228.96/2810.3.228.97 – 10.3.228.11010.3.228.111
810.3.228.112/2810.3.228.113 – 10.3.228.12610.3.228.127
910.3.228.128/2810.3.228.129 – 10.3.228.14210.3.228.143
1010.3.228.144/2810.3.228.145 – 10.3.228.15810.3.228.159
1110.3.228.160/2810.3.228.161 – 10.3.228.17410.3.228.175
1210.3.228.176/2810.3.228.177 – 10.3.228.19010.3.228.191
1310.3.228.192/2810.3.228.193 – 10.3.228.20610.3.228.207
1410.3.228.208/2810.3.228.209 – 10.3.228.22210.3.228.223
1510.3.228.224/2810.3.228.225 – 10.3.228.23810.3.228.239
1610.3.228.240/2810.3.228.241 – 10.3.228.25410.3.228.255
1710.3.229.0/2810.3.229.1 – 10.3.229.1410.3.229.15
1810.3.229.16/2810.3.229.17 – 10.3.229.3010.3.229.31
1910.3.229.32/2810.3.229.33 – 10.3.229.4610.3.229.47
2010.3.229.48/2810.3.229.49 – 10.3.229.6210.3.229.63
2110.3.229.64/2810.3.229.65 – 10.3.229.7810.3.229.79
2210.3.229.80/2810.3.229.81 – 10.3.229.9410.3.229.95
2310.3.229.96/2810.3.229.97 – 10.3.229.11010.3.229.111
2410.3.229.112/2810.3.229.113 – 10.3.229.12610.3.229.127
2510.3.229.128/2810.3.229.129 – 10.3.229.14210.3.229.143
2610.3.229.144/2810.3.229.145 – 10.3.229.15810.3.229.159
2710.3.229.160/2810.3.229.161 – 10.3.229.17410.3.229.175
2810.3.229.176/2810.3.229.177 – 10.3.229.19010.3.229.191
2910.3.229.192/2810.3.229.193 – 10.3.229.20610.3.229.207
3010.3.229.208/2810.3.229.209 – 10.3.229.22210.3.229.223
3110.3.229.224/2810.3.229.225 – 10.3.229.23810.3.229.239
3210.3.229.240/2810.3.229.241 – 10.3.229.25410.3.229.255
3310.3.230.0/2810.3.230.1 – 10.3.230.1410.3.230.15
3410.3.230.16/2810.3.230.17 – 10.3.230.3010.3.230.31
3510.3.230.32/2810.3.230.33 – 10.3.230.4610.3.230.47
3610.3.230.48/2810.3.230.49 – 10.3.230.6210.3.230.63
3710.3.230.64/2810.3.230.65 – 10.3.230.7810.3.230.79
3810.3.230.80/2810.3.230.81 – 10.3.230.9410.3.230.95
3910.3.230.96/2810.3.230.97 – 10.3.230.11010.3.230.111
4010.3.230.112/2810.3.230.113 – 10.3.230.12610.3.230.127
4110.3.230.128/2810.3.230.129 – 10.3.230.14210.3.230.143
4210.3.230.144/2810.3.230.145 – 10.3.230.15810.3.230.159
4310.3.230.160/2810.3.230.161 – 10.3.230.17410.3.230.175
4410.3.230.176/2810.3.230.177 – 10.3.230.19010.3.230.191
4510.3.230.192/2810.3.230.193 – 10.3.230.20610.3.230.207
4610.3.230.208/2810.3.230.209 – 10.3.230.22210.3.230.223
4710.3.230.224/2810.3.230.225 – 10.3.230.23810.3.230.239
4810.3.230.240/2810.3.230.241 – 10.3.230.25410.3.230.255
4910.3.231.0/2810.3.231.1 – 10.3.231.1410.3.231.15
5010.3.231.16/2810.3.231.17 – 10.3.231.3010.3.231.31
5110.3.231.32/2810.3.231.33 – 10.3.231.4610.3.231.47
5210.3.231.48/2810.3.231.49 – 10.3.231.6210.3.231.63
5310.3.231.64/2810.3.231.65 – 10.3.231.7810.3.231.79
5410.3.231.80/2810.3.231.81 – 10.3.231.9410.3.231.95
5510.3.231.96/2810.3.231.97 – 10.3.231.11010.3.231.111
5610.3.231.112/2810.3.231.113 – 10.3.231.12610.3.231.127
5710.3.231.128/2810.3.231.129 – 10.3.231.14210.3.231.143
5810.3.231.144/2810.3.231.145 – 10.3.231.15810.3.231.159
5910.3.231.160/2810.3.231.161 – 10.3.231.17410.3.231.175
6010.3.231.176/2810.3.231.177 – 10.3.231.19010.3.231.191
6110.3.231.192/2810.3.231.193 – 10.3.231.20610.3.231.207
6210.3.231.208/2810.3.231.209 – 10.3.231.22210.3.231.223
6310.3.231.224/2810.3.231.225 – 10.3.231.23810.3.231.239
6410.3.231.240/2810.3.231.241 – 10.3.231.25410.3.231.255
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 →