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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)10.167.128.0/22
network10.167.128.0/22
broadcast10.167.131.255
first host10.167.128.1
last host10.167.131.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.167.128.0/22
address00001010.10100111.10000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10100111.10000000.00000000
broadcast00001010.10100111.10000011.11111111
green = network part, grey = host part
hex0x0aa78000
decimal178749440
reverse dns0.128.167.10.in-addr.arpa
ipv4-mapped::ffff:aa7:8000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.167.128.0/2810.167.128.1 – 10.167.128.1410.167.128.15
210.167.128.16/2810.167.128.17 – 10.167.128.3010.167.128.31
310.167.128.32/2810.167.128.33 – 10.167.128.4610.167.128.47
410.167.128.48/2810.167.128.49 – 10.167.128.6210.167.128.63
510.167.128.64/2810.167.128.65 – 10.167.128.7810.167.128.79
610.167.128.80/2810.167.128.81 – 10.167.128.9410.167.128.95
710.167.128.96/2810.167.128.97 – 10.167.128.11010.167.128.111
810.167.128.112/2810.167.128.113 – 10.167.128.12610.167.128.127
910.167.128.128/2810.167.128.129 – 10.167.128.14210.167.128.143
1010.167.128.144/2810.167.128.145 – 10.167.128.15810.167.128.159
1110.167.128.160/2810.167.128.161 – 10.167.128.17410.167.128.175
1210.167.128.176/2810.167.128.177 – 10.167.128.19010.167.128.191
1310.167.128.192/2810.167.128.193 – 10.167.128.20610.167.128.207
1410.167.128.208/2810.167.128.209 – 10.167.128.22210.167.128.223
1510.167.128.224/2810.167.128.225 – 10.167.128.23810.167.128.239
1610.167.128.240/2810.167.128.241 – 10.167.128.25410.167.128.255
1710.167.129.0/2810.167.129.1 – 10.167.129.1410.167.129.15
1810.167.129.16/2810.167.129.17 – 10.167.129.3010.167.129.31
1910.167.129.32/2810.167.129.33 – 10.167.129.4610.167.129.47
2010.167.129.48/2810.167.129.49 – 10.167.129.6210.167.129.63
2110.167.129.64/2810.167.129.65 – 10.167.129.7810.167.129.79
2210.167.129.80/2810.167.129.81 – 10.167.129.9410.167.129.95
2310.167.129.96/2810.167.129.97 – 10.167.129.11010.167.129.111
2410.167.129.112/2810.167.129.113 – 10.167.129.12610.167.129.127
2510.167.129.128/2810.167.129.129 – 10.167.129.14210.167.129.143
2610.167.129.144/2810.167.129.145 – 10.167.129.15810.167.129.159
2710.167.129.160/2810.167.129.161 – 10.167.129.17410.167.129.175
2810.167.129.176/2810.167.129.177 – 10.167.129.19010.167.129.191
2910.167.129.192/2810.167.129.193 – 10.167.129.20610.167.129.207
3010.167.129.208/2810.167.129.209 – 10.167.129.22210.167.129.223
3110.167.129.224/2810.167.129.225 – 10.167.129.23810.167.129.239
3210.167.129.240/2810.167.129.241 – 10.167.129.25410.167.129.255
3310.167.130.0/2810.167.130.1 – 10.167.130.1410.167.130.15
3410.167.130.16/2810.167.130.17 – 10.167.130.3010.167.130.31
3510.167.130.32/2810.167.130.33 – 10.167.130.4610.167.130.47
3610.167.130.48/2810.167.130.49 – 10.167.130.6210.167.130.63
3710.167.130.64/2810.167.130.65 – 10.167.130.7810.167.130.79
3810.167.130.80/2810.167.130.81 – 10.167.130.9410.167.130.95
3910.167.130.96/2810.167.130.97 – 10.167.130.11010.167.130.111
4010.167.130.112/2810.167.130.113 – 10.167.130.12610.167.130.127
4110.167.130.128/2810.167.130.129 – 10.167.130.14210.167.130.143
4210.167.130.144/2810.167.130.145 – 10.167.130.15810.167.130.159
4310.167.130.160/2810.167.130.161 – 10.167.130.17410.167.130.175
4410.167.130.176/2810.167.130.177 – 10.167.130.19010.167.130.191
4510.167.130.192/2810.167.130.193 – 10.167.130.20610.167.130.207
4610.167.130.208/2810.167.130.209 – 10.167.130.22210.167.130.223
4710.167.130.224/2810.167.130.225 – 10.167.130.23810.167.130.239
4810.167.130.240/2810.167.130.241 – 10.167.130.25410.167.130.255
4910.167.131.0/2810.167.131.1 – 10.167.131.1410.167.131.15
5010.167.131.16/2810.167.131.17 – 10.167.131.3010.167.131.31
5110.167.131.32/2810.167.131.33 – 10.167.131.4610.167.131.47
5210.167.131.48/2810.167.131.49 – 10.167.131.6210.167.131.63
5310.167.131.64/2810.167.131.65 – 10.167.131.7810.167.131.79
5410.167.131.80/2810.167.131.81 – 10.167.131.9410.167.131.95
5510.167.131.96/2810.167.131.97 – 10.167.131.11010.167.131.111
5610.167.131.112/2810.167.131.113 – 10.167.131.12610.167.131.127
5710.167.131.128/2810.167.131.129 – 10.167.131.14210.167.131.143
5810.167.131.144/2810.167.131.145 – 10.167.131.15810.167.131.159
5910.167.131.160/2810.167.131.161 – 10.167.131.17410.167.131.175
6010.167.131.176/2810.167.131.177 – 10.167.131.19010.167.131.191
6110.167.131.192/2810.167.131.193 – 10.167.131.20610.167.131.207
6210.167.131.208/2810.167.131.209 – 10.167.131.22210.167.131.223
6310.167.131.224/2810.167.131.225 – 10.167.131.23810.167.131.239
6410.167.131.240/2810.167.131.241 – 10.167.131.25410.167.131.255
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 →