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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)10.5.124.0/22
network10.5.124.0/22
broadcast10.5.127.255
first host10.5.124.1
last host10.5.127.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.5.124.0/22
address00001010.00000101.01111100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000101.01111100.00000000
broadcast00001010.00000101.01111111.11111111
green = network part, grey = host part
hex0x0a057c00
decimal168131584
reverse dns0.124.5.10.in-addr.arpa
ipv4-mapped::ffff:a05:7c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.5.124.0/2810.5.124.1 – 10.5.124.1410.5.124.15
210.5.124.16/2810.5.124.17 – 10.5.124.3010.5.124.31
310.5.124.32/2810.5.124.33 – 10.5.124.4610.5.124.47
410.5.124.48/2810.5.124.49 – 10.5.124.6210.5.124.63
510.5.124.64/2810.5.124.65 – 10.5.124.7810.5.124.79
610.5.124.80/2810.5.124.81 – 10.5.124.9410.5.124.95
710.5.124.96/2810.5.124.97 – 10.5.124.11010.5.124.111
810.5.124.112/2810.5.124.113 – 10.5.124.12610.5.124.127
910.5.124.128/2810.5.124.129 – 10.5.124.14210.5.124.143
1010.5.124.144/2810.5.124.145 – 10.5.124.15810.5.124.159
1110.5.124.160/2810.5.124.161 – 10.5.124.17410.5.124.175
1210.5.124.176/2810.5.124.177 – 10.5.124.19010.5.124.191
1310.5.124.192/2810.5.124.193 – 10.5.124.20610.5.124.207
1410.5.124.208/2810.5.124.209 – 10.5.124.22210.5.124.223
1510.5.124.224/2810.5.124.225 – 10.5.124.23810.5.124.239
1610.5.124.240/2810.5.124.241 – 10.5.124.25410.5.124.255
1710.5.125.0/2810.5.125.1 – 10.5.125.1410.5.125.15
1810.5.125.16/2810.5.125.17 – 10.5.125.3010.5.125.31
1910.5.125.32/2810.5.125.33 – 10.5.125.4610.5.125.47
2010.5.125.48/2810.5.125.49 – 10.5.125.6210.5.125.63
2110.5.125.64/2810.5.125.65 – 10.5.125.7810.5.125.79
2210.5.125.80/2810.5.125.81 – 10.5.125.9410.5.125.95
2310.5.125.96/2810.5.125.97 – 10.5.125.11010.5.125.111
2410.5.125.112/2810.5.125.113 – 10.5.125.12610.5.125.127
2510.5.125.128/2810.5.125.129 – 10.5.125.14210.5.125.143
2610.5.125.144/2810.5.125.145 – 10.5.125.15810.5.125.159
2710.5.125.160/2810.5.125.161 – 10.5.125.17410.5.125.175
2810.5.125.176/2810.5.125.177 – 10.5.125.19010.5.125.191
2910.5.125.192/2810.5.125.193 – 10.5.125.20610.5.125.207
3010.5.125.208/2810.5.125.209 – 10.5.125.22210.5.125.223
3110.5.125.224/2810.5.125.225 – 10.5.125.23810.5.125.239
3210.5.125.240/2810.5.125.241 – 10.5.125.25410.5.125.255
3310.5.126.0/2810.5.126.1 – 10.5.126.1410.5.126.15
3410.5.126.16/2810.5.126.17 – 10.5.126.3010.5.126.31
3510.5.126.32/2810.5.126.33 – 10.5.126.4610.5.126.47
3610.5.126.48/2810.5.126.49 – 10.5.126.6210.5.126.63
3710.5.126.64/2810.5.126.65 – 10.5.126.7810.5.126.79
3810.5.126.80/2810.5.126.81 – 10.5.126.9410.5.126.95
3910.5.126.96/2810.5.126.97 – 10.5.126.11010.5.126.111
4010.5.126.112/2810.5.126.113 – 10.5.126.12610.5.126.127
4110.5.126.128/2810.5.126.129 – 10.5.126.14210.5.126.143
4210.5.126.144/2810.5.126.145 – 10.5.126.15810.5.126.159
4310.5.126.160/2810.5.126.161 – 10.5.126.17410.5.126.175
4410.5.126.176/2810.5.126.177 – 10.5.126.19010.5.126.191
4510.5.126.192/2810.5.126.193 – 10.5.126.20610.5.126.207
4610.5.126.208/2810.5.126.209 – 10.5.126.22210.5.126.223
4710.5.126.224/2810.5.126.225 – 10.5.126.23810.5.126.239
4810.5.126.240/2810.5.126.241 – 10.5.126.25410.5.126.255
4910.5.127.0/2810.5.127.1 – 10.5.127.1410.5.127.15
5010.5.127.16/2810.5.127.17 – 10.5.127.3010.5.127.31
5110.5.127.32/2810.5.127.33 – 10.5.127.4610.5.127.47
5210.5.127.48/2810.5.127.49 – 10.5.127.6210.5.127.63
5310.5.127.64/2810.5.127.65 – 10.5.127.7810.5.127.79
5410.5.127.80/2810.5.127.81 – 10.5.127.9410.5.127.95
5510.5.127.96/2810.5.127.97 – 10.5.127.11010.5.127.111
5610.5.127.112/2810.5.127.113 – 10.5.127.12610.5.127.127
5710.5.127.128/2810.5.127.129 – 10.5.127.14210.5.127.143
5810.5.127.144/2810.5.127.145 – 10.5.127.15810.5.127.159
5910.5.127.160/2810.5.127.161 – 10.5.127.17410.5.127.175
6010.5.127.176/2810.5.127.177 – 10.5.127.19010.5.127.191
6110.5.127.192/2810.5.127.193 – 10.5.127.20610.5.127.207
6210.5.127.208/2810.5.127.209 – 10.5.127.22210.5.127.223
6310.5.127.224/2810.5.127.225 – 10.5.127.23810.5.127.239
6410.5.127.240/2810.5.127.241 – 10.5.127.25410.5.127.255
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 →