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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)10.3.188.0/22
network10.3.188.0/22
broadcast10.3.191.255
first host10.3.188.1
last host10.3.191.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.188.0/22
address00001010.00000011.10111100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.10111100.00000000
broadcast00001010.00000011.10111111.11111111
green = network part, grey = host part
hex0x0a03bc00
decimal168016896
reverse dns0.188.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:bc00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.188.0/2810.3.188.1 – 10.3.188.1410.3.188.15
210.3.188.16/2810.3.188.17 – 10.3.188.3010.3.188.31
310.3.188.32/2810.3.188.33 – 10.3.188.4610.3.188.47
410.3.188.48/2810.3.188.49 – 10.3.188.6210.3.188.63
510.3.188.64/2810.3.188.65 – 10.3.188.7810.3.188.79
610.3.188.80/2810.3.188.81 – 10.3.188.9410.3.188.95
710.3.188.96/2810.3.188.97 – 10.3.188.11010.3.188.111
810.3.188.112/2810.3.188.113 – 10.3.188.12610.3.188.127
910.3.188.128/2810.3.188.129 – 10.3.188.14210.3.188.143
1010.3.188.144/2810.3.188.145 – 10.3.188.15810.3.188.159
1110.3.188.160/2810.3.188.161 – 10.3.188.17410.3.188.175
1210.3.188.176/2810.3.188.177 – 10.3.188.19010.3.188.191
1310.3.188.192/2810.3.188.193 – 10.3.188.20610.3.188.207
1410.3.188.208/2810.3.188.209 – 10.3.188.22210.3.188.223
1510.3.188.224/2810.3.188.225 – 10.3.188.23810.3.188.239
1610.3.188.240/2810.3.188.241 – 10.3.188.25410.3.188.255
1710.3.189.0/2810.3.189.1 – 10.3.189.1410.3.189.15
1810.3.189.16/2810.3.189.17 – 10.3.189.3010.3.189.31
1910.3.189.32/2810.3.189.33 – 10.3.189.4610.3.189.47
2010.3.189.48/2810.3.189.49 – 10.3.189.6210.3.189.63
2110.3.189.64/2810.3.189.65 – 10.3.189.7810.3.189.79
2210.3.189.80/2810.3.189.81 – 10.3.189.9410.3.189.95
2310.3.189.96/2810.3.189.97 – 10.3.189.11010.3.189.111
2410.3.189.112/2810.3.189.113 – 10.3.189.12610.3.189.127
2510.3.189.128/2810.3.189.129 – 10.3.189.14210.3.189.143
2610.3.189.144/2810.3.189.145 – 10.3.189.15810.3.189.159
2710.3.189.160/2810.3.189.161 – 10.3.189.17410.3.189.175
2810.3.189.176/2810.3.189.177 – 10.3.189.19010.3.189.191
2910.3.189.192/2810.3.189.193 – 10.3.189.20610.3.189.207
3010.3.189.208/2810.3.189.209 – 10.3.189.22210.3.189.223
3110.3.189.224/2810.3.189.225 – 10.3.189.23810.3.189.239
3210.3.189.240/2810.3.189.241 – 10.3.189.25410.3.189.255
3310.3.190.0/2810.3.190.1 – 10.3.190.1410.3.190.15
3410.3.190.16/2810.3.190.17 – 10.3.190.3010.3.190.31
3510.3.190.32/2810.3.190.33 – 10.3.190.4610.3.190.47
3610.3.190.48/2810.3.190.49 – 10.3.190.6210.3.190.63
3710.3.190.64/2810.3.190.65 – 10.3.190.7810.3.190.79
3810.3.190.80/2810.3.190.81 – 10.3.190.9410.3.190.95
3910.3.190.96/2810.3.190.97 – 10.3.190.11010.3.190.111
4010.3.190.112/2810.3.190.113 – 10.3.190.12610.3.190.127
4110.3.190.128/2810.3.190.129 – 10.3.190.14210.3.190.143
4210.3.190.144/2810.3.190.145 – 10.3.190.15810.3.190.159
4310.3.190.160/2810.3.190.161 – 10.3.190.17410.3.190.175
4410.3.190.176/2810.3.190.177 – 10.3.190.19010.3.190.191
4510.3.190.192/2810.3.190.193 – 10.3.190.20610.3.190.207
4610.3.190.208/2810.3.190.209 – 10.3.190.22210.3.190.223
4710.3.190.224/2810.3.190.225 – 10.3.190.23810.3.190.239
4810.3.190.240/2810.3.190.241 – 10.3.190.25410.3.190.255
4910.3.191.0/2810.3.191.1 – 10.3.191.1410.3.191.15
5010.3.191.16/2810.3.191.17 – 10.3.191.3010.3.191.31
5110.3.191.32/2810.3.191.33 – 10.3.191.4610.3.191.47
5210.3.191.48/2810.3.191.49 – 10.3.191.6210.3.191.63
5310.3.191.64/2810.3.191.65 – 10.3.191.7810.3.191.79
5410.3.191.80/2810.3.191.81 – 10.3.191.9410.3.191.95
5510.3.191.96/2810.3.191.97 – 10.3.191.11010.3.191.111
5610.3.191.112/2810.3.191.113 – 10.3.191.12610.3.191.127
5710.3.191.128/2810.3.191.129 – 10.3.191.14210.3.191.143
5810.3.191.144/2810.3.191.145 – 10.3.191.15810.3.191.159
5910.3.191.160/2810.3.191.161 – 10.3.191.17410.3.191.175
6010.3.191.176/2810.3.191.177 – 10.3.191.19010.3.191.191
6110.3.191.192/2810.3.191.193 – 10.3.191.20610.3.191.207
6210.3.191.208/2810.3.191.209 – 10.3.191.22210.3.191.223
6310.3.191.224/2810.3.191.225 – 10.3.191.23810.3.191.239
6410.3.191.240/2810.3.191.241 – 10.3.191.25410.3.191.255
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 →