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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)10.40.80.0/22
network10.40.80.0/22
broadcast10.40.83.255
first host10.40.80.1
last host10.40.83.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.40.80.0/22
address00001010.00101000.01010000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00101000.01010000.00000000
broadcast00001010.00101000.01010011.11111111
green = network part, grey = host part
hex0x0a285000
decimal170414080
reverse dns0.80.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:5000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.40.80.0/2810.40.80.1 – 10.40.80.1410.40.80.15
210.40.80.16/2810.40.80.17 – 10.40.80.3010.40.80.31
310.40.80.32/2810.40.80.33 – 10.40.80.4610.40.80.47
410.40.80.48/2810.40.80.49 – 10.40.80.6210.40.80.63
510.40.80.64/2810.40.80.65 – 10.40.80.7810.40.80.79
610.40.80.80/2810.40.80.81 – 10.40.80.9410.40.80.95
710.40.80.96/2810.40.80.97 – 10.40.80.11010.40.80.111
810.40.80.112/2810.40.80.113 – 10.40.80.12610.40.80.127
910.40.80.128/2810.40.80.129 – 10.40.80.14210.40.80.143
1010.40.80.144/2810.40.80.145 – 10.40.80.15810.40.80.159
1110.40.80.160/2810.40.80.161 – 10.40.80.17410.40.80.175
1210.40.80.176/2810.40.80.177 – 10.40.80.19010.40.80.191
1310.40.80.192/2810.40.80.193 – 10.40.80.20610.40.80.207
1410.40.80.208/2810.40.80.209 – 10.40.80.22210.40.80.223
1510.40.80.224/2810.40.80.225 – 10.40.80.23810.40.80.239
1610.40.80.240/2810.40.80.241 – 10.40.80.25410.40.80.255
1710.40.81.0/2810.40.81.1 – 10.40.81.1410.40.81.15
1810.40.81.16/2810.40.81.17 – 10.40.81.3010.40.81.31
1910.40.81.32/2810.40.81.33 – 10.40.81.4610.40.81.47
2010.40.81.48/2810.40.81.49 – 10.40.81.6210.40.81.63
2110.40.81.64/2810.40.81.65 – 10.40.81.7810.40.81.79
2210.40.81.80/2810.40.81.81 – 10.40.81.9410.40.81.95
2310.40.81.96/2810.40.81.97 – 10.40.81.11010.40.81.111
2410.40.81.112/2810.40.81.113 – 10.40.81.12610.40.81.127
2510.40.81.128/2810.40.81.129 – 10.40.81.14210.40.81.143
2610.40.81.144/2810.40.81.145 – 10.40.81.15810.40.81.159
2710.40.81.160/2810.40.81.161 – 10.40.81.17410.40.81.175
2810.40.81.176/2810.40.81.177 – 10.40.81.19010.40.81.191
2910.40.81.192/2810.40.81.193 – 10.40.81.20610.40.81.207
3010.40.81.208/2810.40.81.209 – 10.40.81.22210.40.81.223
3110.40.81.224/2810.40.81.225 – 10.40.81.23810.40.81.239
3210.40.81.240/2810.40.81.241 – 10.40.81.25410.40.81.255
3310.40.82.0/2810.40.82.1 – 10.40.82.1410.40.82.15
3410.40.82.16/2810.40.82.17 – 10.40.82.3010.40.82.31
3510.40.82.32/2810.40.82.33 – 10.40.82.4610.40.82.47
3610.40.82.48/2810.40.82.49 – 10.40.82.6210.40.82.63
3710.40.82.64/2810.40.82.65 – 10.40.82.7810.40.82.79
3810.40.82.80/2810.40.82.81 – 10.40.82.9410.40.82.95
3910.40.82.96/2810.40.82.97 – 10.40.82.11010.40.82.111
4010.40.82.112/2810.40.82.113 – 10.40.82.12610.40.82.127
4110.40.82.128/2810.40.82.129 – 10.40.82.14210.40.82.143
4210.40.82.144/2810.40.82.145 – 10.40.82.15810.40.82.159
4310.40.82.160/2810.40.82.161 – 10.40.82.17410.40.82.175
4410.40.82.176/2810.40.82.177 – 10.40.82.19010.40.82.191
4510.40.82.192/2810.40.82.193 – 10.40.82.20610.40.82.207
4610.40.82.208/2810.40.82.209 – 10.40.82.22210.40.82.223
4710.40.82.224/2810.40.82.225 – 10.40.82.23810.40.82.239
4810.40.82.240/2810.40.82.241 – 10.40.82.25410.40.82.255
4910.40.83.0/2810.40.83.1 – 10.40.83.1410.40.83.15
5010.40.83.16/2810.40.83.17 – 10.40.83.3010.40.83.31
5110.40.83.32/2810.40.83.33 – 10.40.83.4610.40.83.47
5210.40.83.48/2810.40.83.49 – 10.40.83.6210.40.83.63
5310.40.83.64/2810.40.83.65 – 10.40.83.7810.40.83.79
5410.40.83.80/2810.40.83.81 – 10.40.83.9410.40.83.95
5510.40.83.96/2810.40.83.97 – 10.40.83.11010.40.83.111
5610.40.83.112/2810.40.83.113 – 10.40.83.12610.40.83.127
5710.40.83.128/2810.40.83.129 – 10.40.83.14210.40.83.143
5810.40.83.144/2810.40.83.145 – 10.40.83.15810.40.83.159
5910.40.83.160/2810.40.83.161 – 10.40.83.17410.40.83.175
6010.40.83.176/2810.40.83.177 – 10.40.83.19010.40.83.191
6110.40.83.192/2810.40.83.193 – 10.40.83.20610.40.83.207
6210.40.83.208/2810.40.83.209 – 10.40.83.22210.40.83.223
6310.40.83.224/2810.40.83.225 – 10.40.83.23810.40.83.239
6410.40.83.240/2810.40.83.241 – 10.40.83.25410.40.83.255
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 →