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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)10.158.100.0/22
network10.158.100.0/22
broadcast10.158.103.255
first host10.158.100.1
last host10.158.103.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.158.100.0/22
address00001010.10011110.01100100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10011110.01100100.00000000
broadcast00001010.10011110.01100111.11111111
green = network part, grey = host part
hex0x0a9e6400
decimal178152448
reverse dns0.100.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:6400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.158.100.0/2810.158.100.1 – 10.158.100.1410.158.100.15
210.158.100.16/2810.158.100.17 – 10.158.100.3010.158.100.31
310.158.100.32/2810.158.100.33 – 10.158.100.4610.158.100.47
410.158.100.48/2810.158.100.49 – 10.158.100.6210.158.100.63
510.158.100.64/2810.158.100.65 – 10.158.100.7810.158.100.79
610.158.100.80/2810.158.100.81 – 10.158.100.9410.158.100.95
710.158.100.96/2810.158.100.97 – 10.158.100.11010.158.100.111
810.158.100.112/2810.158.100.113 – 10.158.100.12610.158.100.127
910.158.100.128/2810.158.100.129 – 10.158.100.14210.158.100.143
1010.158.100.144/2810.158.100.145 – 10.158.100.15810.158.100.159
1110.158.100.160/2810.158.100.161 – 10.158.100.17410.158.100.175
1210.158.100.176/2810.158.100.177 – 10.158.100.19010.158.100.191
1310.158.100.192/2810.158.100.193 – 10.158.100.20610.158.100.207
1410.158.100.208/2810.158.100.209 – 10.158.100.22210.158.100.223
1510.158.100.224/2810.158.100.225 – 10.158.100.23810.158.100.239
1610.158.100.240/2810.158.100.241 – 10.158.100.25410.158.100.255
1710.158.101.0/2810.158.101.1 – 10.158.101.1410.158.101.15
1810.158.101.16/2810.158.101.17 – 10.158.101.3010.158.101.31
1910.158.101.32/2810.158.101.33 – 10.158.101.4610.158.101.47
2010.158.101.48/2810.158.101.49 – 10.158.101.6210.158.101.63
2110.158.101.64/2810.158.101.65 – 10.158.101.7810.158.101.79
2210.158.101.80/2810.158.101.81 – 10.158.101.9410.158.101.95
2310.158.101.96/2810.158.101.97 – 10.158.101.11010.158.101.111
2410.158.101.112/2810.158.101.113 – 10.158.101.12610.158.101.127
2510.158.101.128/2810.158.101.129 – 10.158.101.14210.158.101.143
2610.158.101.144/2810.158.101.145 – 10.158.101.15810.158.101.159
2710.158.101.160/2810.158.101.161 – 10.158.101.17410.158.101.175
2810.158.101.176/2810.158.101.177 – 10.158.101.19010.158.101.191
2910.158.101.192/2810.158.101.193 – 10.158.101.20610.158.101.207
3010.158.101.208/2810.158.101.209 – 10.158.101.22210.158.101.223
3110.158.101.224/2810.158.101.225 – 10.158.101.23810.158.101.239
3210.158.101.240/2810.158.101.241 – 10.158.101.25410.158.101.255
3310.158.102.0/2810.158.102.1 – 10.158.102.1410.158.102.15
3410.158.102.16/2810.158.102.17 – 10.158.102.3010.158.102.31
3510.158.102.32/2810.158.102.33 – 10.158.102.4610.158.102.47
3610.158.102.48/2810.158.102.49 – 10.158.102.6210.158.102.63
3710.158.102.64/2810.158.102.65 – 10.158.102.7810.158.102.79
3810.158.102.80/2810.158.102.81 – 10.158.102.9410.158.102.95
3910.158.102.96/2810.158.102.97 – 10.158.102.11010.158.102.111
4010.158.102.112/2810.158.102.113 – 10.158.102.12610.158.102.127
4110.158.102.128/2810.158.102.129 – 10.158.102.14210.158.102.143
4210.158.102.144/2810.158.102.145 – 10.158.102.15810.158.102.159
4310.158.102.160/2810.158.102.161 – 10.158.102.17410.158.102.175
4410.158.102.176/2810.158.102.177 – 10.158.102.19010.158.102.191
4510.158.102.192/2810.158.102.193 – 10.158.102.20610.158.102.207
4610.158.102.208/2810.158.102.209 – 10.158.102.22210.158.102.223
4710.158.102.224/2810.158.102.225 – 10.158.102.23810.158.102.239
4810.158.102.240/2810.158.102.241 – 10.158.102.25410.158.102.255
4910.158.103.0/2810.158.103.1 – 10.158.103.1410.158.103.15
5010.158.103.16/2810.158.103.17 – 10.158.103.3010.158.103.31
5110.158.103.32/2810.158.103.33 – 10.158.103.4610.158.103.47
5210.158.103.48/2810.158.103.49 – 10.158.103.6210.158.103.63
5310.158.103.64/2810.158.103.65 – 10.158.103.7810.158.103.79
5410.158.103.80/2810.158.103.81 – 10.158.103.9410.158.103.95
5510.158.103.96/2810.158.103.97 – 10.158.103.11010.158.103.111
5610.158.103.112/2810.158.103.113 – 10.158.103.12610.158.103.127
5710.158.103.128/2810.158.103.129 – 10.158.103.14210.158.103.143
5810.158.103.144/2810.158.103.145 – 10.158.103.15810.158.103.159
5910.158.103.160/2810.158.103.161 – 10.158.103.17410.158.103.175
6010.158.103.176/2810.158.103.177 – 10.158.103.19010.158.103.191
6110.158.103.192/2810.158.103.193 – 10.158.103.20610.158.103.207
6210.158.103.208/2810.158.103.209 – 10.158.103.22210.158.103.223
6310.158.103.224/2810.158.103.225 – 10.158.103.23810.158.103.239
6410.158.103.240/2810.158.103.241 – 10.158.103.25410.158.103.255
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 →