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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)10.201.236.0/22
network10.201.236.0/22
broadcast10.201.239.255
first host10.201.236.1
last host10.201.239.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.201.236.0/22
address00001010.11001001.11101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.11001001.11101100.00000000
broadcast00001010.11001001.11101111.11111111
green = network part, grey = host part
hex0x0ac9ec00
decimal181005312
reverse dns0.236.201.10.in-addr.arpa
ipv4-mapped::ffff:ac9:ec00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.201.236.0/2810.201.236.1 – 10.201.236.1410.201.236.15
210.201.236.16/2810.201.236.17 – 10.201.236.3010.201.236.31
310.201.236.32/2810.201.236.33 – 10.201.236.4610.201.236.47
410.201.236.48/2810.201.236.49 – 10.201.236.6210.201.236.63
510.201.236.64/2810.201.236.65 – 10.201.236.7810.201.236.79
610.201.236.80/2810.201.236.81 – 10.201.236.9410.201.236.95
710.201.236.96/2810.201.236.97 – 10.201.236.11010.201.236.111
810.201.236.112/2810.201.236.113 – 10.201.236.12610.201.236.127
910.201.236.128/2810.201.236.129 – 10.201.236.14210.201.236.143
1010.201.236.144/2810.201.236.145 – 10.201.236.15810.201.236.159
1110.201.236.160/2810.201.236.161 – 10.201.236.17410.201.236.175
1210.201.236.176/2810.201.236.177 – 10.201.236.19010.201.236.191
1310.201.236.192/2810.201.236.193 – 10.201.236.20610.201.236.207
1410.201.236.208/2810.201.236.209 – 10.201.236.22210.201.236.223
1510.201.236.224/2810.201.236.225 – 10.201.236.23810.201.236.239
1610.201.236.240/2810.201.236.241 – 10.201.236.25410.201.236.255
1710.201.237.0/2810.201.237.1 – 10.201.237.1410.201.237.15
1810.201.237.16/2810.201.237.17 – 10.201.237.3010.201.237.31
1910.201.237.32/2810.201.237.33 – 10.201.237.4610.201.237.47
2010.201.237.48/2810.201.237.49 – 10.201.237.6210.201.237.63
2110.201.237.64/2810.201.237.65 – 10.201.237.7810.201.237.79
2210.201.237.80/2810.201.237.81 – 10.201.237.9410.201.237.95
2310.201.237.96/2810.201.237.97 – 10.201.237.11010.201.237.111
2410.201.237.112/2810.201.237.113 – 10.201.237.12610.201.237.127
2510.201.237.128/2810.201.237.129 – 10.201.237.14210.201.237.143
2610.201.237.144/2810.201.237.145 – 10.201.237.15810.201.237.159
2710.201.237.160/2810.201.237.161 – 10.201.237.17410.201.237.175
2810.201.237.176/2810.201.237.177 – 10.201.237.19010.201.237.191
2910.201.237.192/2810.201.237.193 – 10.201.237.20610.201.237.207
3010.201.237.208/2810.201.237.209 – 10.201.237.22210.201.237.223
3110.201.237.224/2810.201.237.225 – 10.201.237.23810.201.237.239
3210.201.237.240/2810.201.237.241 – 10.201.237.25410.201.237.255
3310.201.238.0/2810.201.238.1 – 10.201.238.1410.201.238.15
3410.201.238.16/2810.201.238.17 – 10.201.238.3010.201.238.31
3510.201.238.32/2810.201.238.33 – 10.201.238.4610.201.238.47
3610.201.238.48/2810.201.238.49 – 10.201.238.6210.201.238.63
3710.201.238.64/2810.201.238.65 – 10.201.238.7810.201.238.79
3810.201.238.80/2810.201.238.81 – 10.201.238.9410.201.238.95
3910.201.238.96/2810.201.238.97 – 10.201.238.11010.201.238.111
4010.201.238.112/2810.201.238.113 – 10.201.238.12610.201.238.127
4110.201.238.128/2810.201.238.129 – 10.201.238.14210.201.238.143
4210.201.238.144/2810.201.238.145 – 10.201.238.15810.201.238.159
4310.201.238.160/2810.201.238.161 – 10.201.238.17410.201.238.175
4410.201.238.176/2810.201.238.177 – 10.201.238.19010.201.238.191
4510.201.238.192/2810.201.238.193 – 10.201.238.20610.201.238.207
4610.201.238.208/2810.201.238.209 – 10.201.238.22210.201.238.223
4710.201.238.224/2810.201.238.225 – 10.201.238.23810.201.238.239
4810.201.238.240/2810.201.238.241 – 10.201.238.25410.201.238.255
4910.201.239.0/2810.201.239.1 – 10.201.239.1410.201.239.15
5010.201.239.16/2810.201.239.17 – 10.201.239.3010.201.239.31
5110.201.239.32/2810.201.239.33 – 10.201.239.4610.201.239.47
5210.201.239.48/2810.201.239.49 – 10.201.239.6210.201.239.63
5310.201.239.64/2810.201.239.65 – 10.201.239.7810.201.239.79
5410.201.239.80/2810.201.239.81 – 10.201.239.9410.201.239.95
5510.201.239.96/2810.201.239.97 – 10.201.239.11010.201.239.111
5610.201.239.112/2810.201.239.113 – 10.201.239.12610.201.239.127
5710.201.239.128/2810.201.239.129 – 10.201.239.14210.201.239.143
5810.201.239.144/2810.201.239.145 – 10.201.239.15810.201.239.159
5910.201.239.160/2810.201.239.161 – 10.201.239.17410.201.239.175
6010.201.239.176/2810.201.239.177 – 10.201.239.19010.201.239.191
6110.201.239.192/2810.201.239.193 – 10.201.239.20610.201.239.207
6210.201.239.208/2810.201.239.209 – 10.201.239.22210.201.239.223
6310.201.239.224/2810.201.239.225 – 10.201.239.23810.201.239.239
6410.201.239.240/2810.201.239.241 – 10.201.239.25410.201.239.255
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 →