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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)10.71.48.0/22
network10.71.48.0/22
broadcast10.71.51.255
first host10.71.48.1
last host10.71.51.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.71.48.0/22
address00001010.01000111.00110000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01000111.00110000.00000000
broadcast00001010.01000111.00110011.11111111
green = network part, grey = host part
hex0x0a473000
decimal172437504
reverse dns0.48.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:3000

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.71.48.0/2810.71.48.1 – 10.71.48.1410.71.48.15
210.71.48.16/2810.71.48.17 – 10.71.48.3010.71.48.31
310.71.48.32/2810.71.48.33 – 10.71.48.4610.71.48.47
410.71.48.48/2810.71.48.49 – 10.71.48.6210.71.48.63
510.71.48.64/2810.71.48.65 – 10.71.48.7810.71.48.79
610.71.48.80/2810.71.48.81 – 10.71.48.9410.71.48.95
710.71.48.96/2810.71.48.97 – 10.71.48.11010.71.48.111
810.71.48.112/2810.71.48.113 – 10.71.48.12610.71.48.127
910.71.48.128/2810.71.48.129 – 10.71.48.14210.71.48.143
1010.71.48.144/2810.71.48.145 – 10.71.48.15810.71.48.159
1110.71.48.160/2810.71.48.161 – 10.71.48.17410.71.48.175
1210.71.48.176/2810.71.48.177 – 10.71.48.19010.71.48.191
1310.71.48.192/2810.71.48.193 – 10.71.48.20610.71.48.207
1410.71.48.208/2810.71.48.209 – 10.71.48.22210.71.48.223
1510.71.48.224/2810.71.48.225 – 10.71.48.23810.71.48.239
1610.71.48.240/2810.71.48.241 – 10.71.48.25410.71.48.255
1710.71.49.0/2810.71.49.1 – 10.71.49.1410.71.49.15
1810.71.49.16/2810.71.49.17 – 10.71.49.3010.71.49.31
1910.71.49.32/2810.71.49.33 – 10.71.49.4610.71.49.47
2010.71.49.48/2810.71.49.49 – 10.71.49.6210.71.49.63
2110.71.49.64/2810.71.49.65 – 10.71.49.7810.71.49.79
2210.71.49.80/2810.71.49.81 – 10.71.49.9410.71.49.95
2310.71.49.96/2810.71.49.97 – 10.71.49.11010.71.49.111
2410.71.49.112/2810.71.49.113 – 10.71.49.12610.71.49.127
2510.71.49.128/2810.71.49.129 – 10.71.49.14210.71.49.143
2610.71.49.144/2810.71.49.145 – 10.71.49.15810.71.49.159
2710.71.49.160/2810.71.49.161 – 10.71.49.17410.71.49.175
2810.71.49.176/2810.71.49.177 – 10.71.49.19010.71.49.191
2910.71.49.192/2810.71.49.193 – 10.71.49.20610.71.49.207
3010.71.49.208/2810.71.49.209 – 10.71.49.22210.71.49.223
3110.71.49.224/2810.71.49.225 – 10.71.49.23810.71.49.239
3210.71.49.240/2810.71.49.241 – 10.71.49.25410.71.49.255
3310.71.50.0/2810.71.50.1 – 10.71.50.1410.71.50.15
3410.71.50.16/2810.71.50.17 – 10.71.50.3010.71.50.31
3510.71.50.32/2810.71.50.33 – 10.71.50.4610.71.50.47
3610.71.50.48/2810.71.50.49 – 10.71.50.6210.71.50.63
3710.71.50.64/2810.71.50.65 – 10.71.50.7810.71.50.79
3810.71.50.80/2810.71.50.81 – 10.71.50.9410.71.50.95
3910.71.50.96/2810.71.50.97 – 10.71.50.11010.71.50.111
4010.71.50.112/2810.71.50.113 – 10.71.50.12610.71.50.127
4110.71.50.128/2810.71.50.129 – 10.71.50.14210.71.50.143
4210.71.50.144/2810.71.50.145 – 10.71.50.15810.71.50.159
4310.71.50.160/2810.71.50.161 – 10.71.50.17410.71.50.175
4410.71.50.176/2810.71.50.177 – 10.71.50.19010.71.50.191
4510.71.50.192/2810.71.50.193 – 10.71.50.20610.71.50.207
4610.71.50.208/2810.71.50.209 – 10.71.50.22210.71.50.223
4710.71.50.224/2810.71.50.225 – 10.71.50.23810.71.50.239
4810.71.50.240/2810.71.50.241 – 10.71.50.25410.71.50.255
4910.71.51.0/2810.71.51.1 – 10.71.51.1410.71.51.15
5010.71.51.16/2810.71.51.17 – 10.71.51.3010.71.51.31
5110.71.51.32/2810.71.51.33 – 10.71.51.4610.71.51.47
5210.71.51.48/2810.71.51.49 – 10.71.51.6210.71.51.63
5310.71.51.64/2810.71.51.65 – 10.71.51.7810.71.51.79
5410.71.51.80/2810.71.51.81 – 10.71.51.9410.71.51.95
5510.71.51.96/2810.71.51.97 – 10.71.51.11010.71.51.111
5610.71.51.112/2810.71.51.113 – 10.71.51.12610.71.51.127
5710.71.51.128/2810.71.51.129 – 10.71.51.14210.71.51.143
5810.71.51.144/2810.71.51.145 – 10.71.51.15810.71.51.159
5910.71.51.160/2810.71.51.161 – 10.71.51.17410.71.51.175
6010.71.51.176/2810.71.51.177 – 10.71.51.19010.71.51.191
6110.71.51.192/2810.71.51.193 – 10.71.51.20610.71.51.207
6210.71.51.208/2810.71.51.209 – 10.71.51.22210.71.51.223
6310.71.51.224/2810.71.51.225 – 10.71.51.23810.71.51.239
6410.71.51.240/2810.71.51.241 – 10.71.51.25410.71.51.255
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 →