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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)10.0.236.0/22
network10.0.236.0/22
broadcast10.0.239.255
first host10.0.236.1
last host10.0.239.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.0.236.0/22
address00001010.00000000.11101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000000.11101100.00000000
broadcast00001010.00000000.11101111.11111111
green = network part, grey = host part
hex0x0a00ec00
decimal167832576
reverse dns0.236.0.10.in-addr.arpa
ipv4-mapped::ffff:a00:ec00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.0.236.0/2810.0.236.1 – 10.0.236.1410.0.236.15
210.0.236.16/2810.0.236.17 – 10.0.236.3010.0.236.31
310.0.236.32/2810.0.236.33 – 10.0.236.4610.0.236.47
410.0.236.48/2810.0.236.49 – 10.0.236.6210.0.236.63
510.0.236.64/2810.0.236.65 – 10.0.236.7810.0.236.79
610.0.236.80/2810.0.236.81 – 10.0.236.9410.0.236.95
710.0.236.96/2810.0.236.97 – 10.0.236.11010.0.236.111
810.0.236.112/2810.0.236.113 – 10.0.236.12610.0.236.127
910.0.236.128/2810.0.236.129 – 10.0.236.14210.0.236.143
1010.0.236.144/2810.0.236.145 – 10.0.236.15810.0.236.159
1110.0.236.160/2810.0.236.161 – 10.0.236.17410.0.236.175
1210.0.236.176/2810.0.236.177 – 10.0.236.19010.0.236.191
1310.0.236.192/2810.0.236.193 – 10.0.236.20610.0.236.207
1410.0.236.208/2810.0.236.209 – 10.0.236.22210.0.236.223
1510.0.236.224/2810.0.236.225 – 10.0.236.23810.0.236.239
1610.0.236.240/2810.0.236.241 – 10.0.236.25410.0.236.255
1710.0.237.0/2810.0.237.1 – 10.0.237.1410.0.237.15
1810.0.237.16/2810.0.237.17 – 10.0.237.3010.0.237.31
1910.0.237.32/2810.0.237.33 – 10.0.237.4610.0.237.47
2010.0.237.48/2810.0.237.49 – 10.0.237.6210.0.237.63
2110.0.237.64/2810.0.237.65 – 10.0.237.7810.0.237.79
2210.0.237.80/2810.0.237.81 – 10.0.237.9410.0.237.95
2310.0.237.96/2810.0.237.97 – 10.0.237.11010.0.237.111
2410.0.237.112/2810.0.237.113 – 10.0.237.12610.0.237.127
2510.0.237.128/2810.0.237.129 – 10.0.237.14210.0.237.143
2610.0.237.144/2810.0.237.145 – 10.0.237.15810.0.237.159
2710.0.237.160/2810.0.237.161 – 10.0.237.17410.0.237.175
2810.0.237.176/2810.0.237.177 – 10.0.237.19010.0.237.191
2910.0.237.192/2810.0.237.193 – 10.0.237.20610.0.237.207
3010.0.237.208/2810.0.237.209 – 10.0.237.22210.0.237.223
3110.0.237.224/2810.0.237.225 – 10.0.237.23810.0.237.239
3210.0.237.240/2810.0.237.241 – 10.0.237.25410.0.237.255
3310.0.238.0/2810.0.238.1 – 10.0.238.1410.0.238.15
3410.0.238.16/2810.0.238.17 – 10.0.238.3010.0.238.31
3510.0.238.32/2810.0.238.33 – 10.0.238.4610.0.238.47
3610.0.238.48/2810.0.238.49 – 10.0.238.6210.0.238.63
3710.0.238.64/2810.0.238.65 – 10.0.238.7810.0.238.79
3810.0.238.80/2810.0.238.81 – 10.0.238.9410.0.238.95
3910.0.238.96/2810.0.238.97 – 10.0.238.11010.0.238.111
4010.0.238.112/2810.0.238.113 – 10.0.238.12610.0.238.127
4110.0.238.128/2810.0.238.129 – 10.0.238.14210.0.238.143
4210.0.238.144/2810.0.238.145 – 10.0.238.15810.0.238.159
4310.0.238.160/2810.0.238.161 – 10.0.238.17410.0.238.175
4410.0.238.176/2810.0.238.177 – 10.0.238.19010.0.238.191
4510.0.238.192/2810.0.238.193 – 10.0.238.20610.0.238.207
4610.0.238.208/2810.0.238.209 – 10.0.238.22210.0.238.223
4710.0.238.224/2810.0.238.225 – 10.0.238.23810.0.238.239
4810.0.238.240/2810.0.238.241 – 10.0.238.25410.0.238.255
4910.0.239.0/2810.0.239.1 – 10.0.239.1410.0.239.15
5010.0.239.16/2810.0.239.17 – 10.0.239.3010.0.239.31
5110.0.239.32/2810.0.239.33 – 10.0.239.4610.0.239.47
5210.0.239.48/2810.0.239.49 – 10.0.239.6210.0.239.63
5310.0.239.64/2810.0.239.65 – 10.0.239.7810.0.239.79
5410.0.239.80/2810.0.239.81 – 10.0.239.9410.0.239.95
5510.0.239.96/2810.0.239.97 – 10.0.239.11010.0.239.111
5610.0.239.112/2810.0.239.113 – 10.0.239.12610.0.239.127
5710.0.239.128/2810.0.239.129 – 10.0.239.14210.0.239.143
5810.0.239.144/2810.0.239.145 – 10.0.239.15810.0.239.159
5910.0.239.160/2810.0.239.161 – 10.0.239.17410.0.239.175
6010.0.239.176/2810.0.239.177 – 10.0.239.19010.0.239.191
6110.0.239.192/2810.0.239.193 – 10.0.239.20610.0.239.207
6210.0.239.208/2810.0.239.209 – 10.0.239.22210.0.239.223
6310.0.239.224/2810.0.239.225 – 10.0.239.23810.0.239.239
6410.0.239.240/2810.0.239.241 – 10.0.239.25410.0.239.255
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 →