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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)10.205.76.0/22
network10.205.76.0/22
broadcast10.205.79.255
first host10.205.76.1
last host10.205.79.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.205.76.0/22
address00001010.11001101.01001100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.11001101.01001100.00000000
broadcast00001010.11001101.01001111.11111111
green = network part, grey = host part
hex0x0acd4c00
decimal181226496
reverse dns0.76.205.10.in-addr.arpa
ipv4-mapped::ffff:acd:4c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.205.76.0/2810.205.76.1 – 10.205.76.1410.205.76.15
210.205.76.16/2810.205.76.17 – 10.205.76.3010.205.76.31
310.205.76.32/2810.205.76.33 – 10.205.76.4610.205.76.47
410.205.76.48/2810.205.76.49 – 10.205.76.6210.205.76.63
510.205.76.64/2810.205.76.65 – 10.205.76.7810.205.76.79
610.205.76.80/2810.205.76.81 – 10.205.76.9410.205.76.95
710.205.76.96/2810.205.76.97 – 10.205.76.11010.205.76.111
810.205.76.112/2810.205.76.113 – 10.205.76.12610.205.76.127
910.205.76.128/2810.205.76.129 – 10.205.76.14210.205.76.143
1010.205.76.144/2810.205.76.145 – 10.205.76.15810.205.76.159
1110.205.76.160/2810.205.76.161 – 10.205.76.17410.205.76.175
1210.205.76.176/2810.205.76.177 – 10.205.76.19010.205.76.191
1310.205.76.192/2810.205.76.193 – 10.205.76.20610.205.76.207
1410.205.76.208/2810.205.76.209 – 10.205.76.22210.205.76.223
1510.205.76.224/2810.205.76.225 – 10.205.76.23810.205.76.239
1610.205.76.240/2810.205.76.241 – 10.205.76.25410.205.76.255
1710.205.77.0/2810.205.77.1 – 10.205.77.1410.205.77.15
1810.205.77.16/2810.205.77.17 – 10.205.77.3010.205.77.31
1910.205.77.32/2810.205.77.33 – 10.205.77.4610.205.77.47
2010.205.77.48/2810.205.77.49 – 10.205.77.6210.205.77.63
2110.205.77.64/2810.205.77.65 – 10.205.77.7810.205.77.79
2210.205.77.80/2810.205.77.81 – 10.205.77.9410.205.77.95
2310.205.77.96/2810.205.77.97 – 10.205.77.11010.205.77.111
2410.205.77.112/2810.205.77.113 – 10.205.77.12610.205.77.127
2510.205.77.128/2810.205.77.129 – 10.205.77.14210.205.77.143
2610.205.77.144/2810.205.77.145 – 10.205.77.15810.205.77.159
2710.205.77.160/2810.205.77.161 – 10.205.77.17410.205.77.175
2810.205.77.176/2810.205.77.177 – 10.205.77.19010.205.77.191
2910.205.77.192/2810.205.77.193 – 10.205.77.20610.205.77.207
3010.205.77.208/2810.205.77.209 – 10.205.77.22210.205.77.223
3110.205.77.224/2810.205.77.225 – 10.205.77.23810.205.77.239
3210.205.77.240/2810.205.77.241 – 10.205.77.25410.205.77.255
3310.205.78.0/2810.205.78.1 – 10.205.78.1410.205.78.15
3410.205.78.16/2810.205.78.17 – 10.205.78.3010.205.78.31
3510.205.78.32/2810.205.78.33 – 10.205.78.4610.205.78.47
3610.205.78.48/2810.205.78.49 – 10.205.78.6210.205.78.63
3710.205.78.64/2810.205.78.65 – 10.205.78.7810.205.78.79
3810.205.78.80/2810.205.78.81 – 10.205.78.9410.205.78.95
3910.205.78.96/2810.205.78.97 – 10.205.78.11010.205.78.111
4010.205.78.112/2810.205.78.113 – 10.205.78.12610.205.78.127
4110.205.78.128/2810.205.78.129 – 10.205.78.14210.205.78.143
4210.205.78.144/2810.205.78.145 – 10.205.78.15810.205.78.159
4310.205.78.160/2810.205.78.161 – 10.205.78.17410.205.78.175
4410.205.78.176/2810.205.78.177 – 10.205.78.19010.205.78.191
4510.205.78.192/2810.205.78.193 – 10.205.78.20610.205.78.207
4610.205.78.208/2810.205.78.209 – 10.205.78.22210.205.78.223
4710.205.78.224/2810.205.78.225 – 10.205.78.23810.205.78.239
4810.205.78.240/2810.205.78.241 – 10.205.78.25410.205.78.255
4910.205.79.0/2810.205.79.1 – 10.205.79.1410.205.79.15
5010.205.79.16/2810.205.79.17 – 10.205.79.3010.205.79.31
5110.205.79.32/2810.205.79.33 – 10.205.79.4610.205.79.47
5210.205.79.48/2810.205.79.49 – 10.205.79.6210.205.79.63
5310.205.79.64/2810.205.79.65 – 10.205.79.7810.205.79.79
5410.205.79.80/2810.205.79.81 – 10.205.79.9410.205.79.95
5510.205.79.96/2810.205.79.97 – 10.205.79.11010.205.79.111
5610.205.79.112/2810.205.79.113 – 10.205.79.12610.205.79.127
5710.205.79.128/2810.205.79.129 – 10.205.79.14210.205.79.143
5810.205.79.144/2810.205.79.145 – 10.205.79.15810.205.79.159
5910.205.79.160/2810.205.79.161 – 10.205.79.17410.205.79.175
6010.205.79.176/2810.205.79.177 – 10.205.79.19010.205.79.191
6110.205.79.192/2810.205.79.193 – 10.205.79.20610.205.79.207
6210.205.79.208/2810.205.79.209 – 10.205.79.22210.205.79.223
6310.205.79.224/2810.205.79.225 – 10.205.79.23810.205.79.239
6410.205.79.240/2810.205.79.241 – 10.205.79.25410.205.79.255
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 →