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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)10.3.168.0/22
network10.3.168.0/22
broadcast10.3.171.255
first host10.3.168.1
last host10.3.171.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.3.168.0/22
address00001010.00000011.10101000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000011.10101000.00000000
broadcast00001010.00000011.10101011.11111111
green = network part, grey = host part
hex0x0a03a800
decimal168011776
reverse dns0.168.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:a800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.3.168.0/2810.3.168.1 – 10.3.168.1410.3.168.15
210.3.168.16/2810.3.168.17 – 10.3.168.3010.3.168.31
310.3.168.32/2810.3.168.33 – 10.3.168.4610.3.168.47
410.3.168.48/2810.3.168.49 – 10.3.168.6210.3.168.63
510.3.168.64/2810.3.168.65 – 10.3.168.7810.3.168.79
610.3.168.80/2810.3.168.81 – 10.3.168.9410.3.168.95
710.3.168.96/2810.3.168.97 – 10.3.168.11010.3.168.111
810.3.168.112/2810.3.168.113 – 10.3.168.12610.3.168.127
910.3.168.128/2810.3.168.129 – 10.3.168.14210.3.168.143
1010.3.168.144/2810.3.168.145 – 10.3.168.15810.3.168.159
1110.3.168.160/2810.3.168.161 – 10.3.168.17410.3.168.175
1210.3.168.176/2810.3.168.177 – 10.3.168.19010.3.168.191
1310.3.168.192/2810.3.168.193 – 10.3.168.20610.3.168.207
1410.3.168.208/2810.3.168.209 – 10.3.168.22210.3.168.223
1510.3.168.224/2810.3.168.225 – 10.3.168.23810.3.168.239
1610.3.168.240/2810.3.168.241 – 10.3.168.25410.3.168.255
1710.3.169.0/2810.3.169.1 – 10.3.169.1410.3.169.15
1810.3.169.16/2810.3.169.17 – 10.3.169.3010.3.169.31
1910.3.169.32/2810.3.169.33 – 10.3.169.4610.3.169.47
2010.3.169.48/2810.3.169.49 – 10.3.169.6210.3.169.63
2110.3.169.64/2810.3.169.65 – 10.3.169.7810.3.169.79
2210.3.169.80/2810.3.169.81 – 10.3.169.9410.3.169.95
2310.3.169.96/2810.3.169.97 – 10.3.169.11010.3.169.111
2410.3.169.112/2810.3.169.113 – 10.3.169.12610.3.169.127
2510.3.169.128/2810.3.169.129 – 10.3.169.14210.3.169.143
2610.3.169.144/2810.3.169.145 – 10.3.169.15810.3.169.159
2710.3.169.160/2810.3.169.161 – 10.3.169.17410.3.169.175
2810.3.169.176/2810.3.169.177 – 10.3.169.19010.3.169.191
2910.3.169.192/2810.3.169.193 – 10.3.169.20610.3.169.207
3010.3.169.208/2810.3.169.209 – 10.3.169.22210.3.169.223
3110.3.169.224/2810.3.169.225 – 10.3.169.23810.3.169.239
3210.3.169.240/2810.3.169.241 – 10.3.169.25410.3.169.255
3310.3.170.0/2810.3.170.1 – 10.3.170.1410.3.170.15
3410.3.170.16/2810.3.170.17 – 10.3.170.3010.3.170.31
3510.3.170.32/2810.3.170.33 – 10.3.170.4610.3.170.47
3610.3.170.48/2810.3.170.49 – 10.3.170.6210.3.170.63
3710.3.170.64/2810.3.170.65 – 10.3.170.7810.3.170.79
3810.3.170.80/2810.3.170.81 – 10.3.170.9410.3.170.95
3910.3.170.96/2810.3.170.97 – 10.3.170.11010.3.170.111
4010.3.170.112/2810.3.170.113 – 10.3.170.12610.3.170.127
4110.3.170.128/2810.3.170.129 – 10.3.170.14210.3.170.143
4210.3.170.144/2810.3.170.145 – 10.3.170.15810.3.170.159
4310.3.170.160/2810.3.170.161 – 10.3.170.17410.3.170.175
4410.3.170.176/2810.3.170.177 – 10.3.170.19010.3.170.191
4510.3.170.192/2810.3.170.193 – 10.3.170.20610.3.170.207
4610.3.170.208/2810.3.170.209 – 10.3.170.22210.3.170.223
4710.3.170.224/2810.3.170.225 – 10.3.170.23810.3.170.239
4810.3.170.240/2810.3.170.241 – 10.3.170.25410.3.170.255
4910.3.171.0/2810.3.171.1 – 10.3.171.1410.3.171.15
5010.3.171.16/2810.3.171.17 – 10.3.171.3010.3.171.31
5110.3.171.32/2810.3.171.33 – 10.3.171.4610.3.171.47
5210.3.171.48/2810.3.171.49 – 10.3.171.6210.3.171.63
5310.3.171.64/2810.3.171.65 – 10.3.171.7810.3.171.79
5410.3.171.80/2810.3.171.81 – 10.3.171.9410.3.171.95
5510.3.171.96/2810.3.171.97 – 10.3.171.11010.3.171.111
5610.3.171.112/2810.3.171.113 – 10.3.171.12610.3.171.127
5710.3.171.128/2810.3.171.129 – 10.3.171.14210.3.171.143
5810.3.171.144/2810.3.171.145 – 10.3.171.15810.3.171.159
5910.3.171.160/2810.3.171.161 – 10.3.171.17410.3.171.175
6010.3.171.176/2810.3.171.177 – 10.3.171.19010.3.171.191
6110.3.171.192/2810.3.171.193 – 10.3.171.20610.3.171.207
6210.3.171.208/2810.3.171.209 – 10.3.171.22210.3.171.223
6310.3.171.224/2810.3.171.225 – 10.3.171.23810.3.171.239
6410.3.171.240/2810.3.171.241 – 10.3.171.25410.3.171.255
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 →