ip
ipku.in

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)10.72.84.0/22
network10.72.84.0/22
broadcast10.72.87.255
first host10.72.84.1
last host10.72.87.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.72.84.0/22
address00001010.01001000.01010100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001000.01010100.00000000
broadcast00001010.01001000.01010111.11111111
green = network part, grey = host part
hex0x0a485400
decimal172512256
reverse dns0.84.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:5400

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.72.84.0/2710.72.84.1 – 10.72.84.3010.72.84.31
210.72.84.32/2710.72.84.33 – 10.72.84.6210.72.84.63
310.72.84.64/2710.72.84.65 – 10.72.84.9410.72.84.95
410.72.84.96/2710.72.84.97 – 10.72.84.12610.72.84.127
510.72.84.128/2710.72.84.129 – 10.72.84.15810.72.84.159
610.72.84.160/2710.72.84.161 – 10.72.84.19010.72.84.191
710.72.84.192/2710.72.84.193 – 10.72.84.22210.72.84.223
810.72.84.224/2710.72.84.225 – 10.72.84.25410.72.84.255
910.72.85.0/2710.72.85.1 – 10.72.85.3010.72.85.31
1010.72.85.32/2710.72.85.33 – 10.72.85.6210.72.85.63
1110.72.85.64/2710.72.85.65 – 10.72.85.9410.72.85.95
1210.72.85.96/2710.72.85.97 – 10.72.85.12610.72.85.127
1310.72.85.128/2710.72.85.129 – 10.72.85.15810.72.85.159
1410.72.85.160/2710.72.85.161 – 10.72.85.19010.72.85.191
1510.72.85.192/2710.72.85.193 – 10.72.85.22210.72.85.223
1610.72.85.224/2710.72.85.225 – 10.72.85.25410.72.85.255
1710.72.86.0/2710.72.86.1 – 10.72.86.3010.72.86.31
1810.72.86.32/2710.72.86.33 – 10.72.86.6210.72.86.63
1910.72.86.64/2710.72.86.65 – 10.72.86.9410.72.86.95
2010.72.86.96/2710.72.86.97 – 10.72.86.12610.72.86.127
2110.72.86.128/2710.72.86.129 – 10.72.86.15810.72.86.159
2210.72.86.160/2710.72.86.161 – 10.72.86.19010.72.86.191
2310.72.86.192/2710.72.86.193 – 10.72.86.22210.72.86.223
2410.72.86.224/2710.72.86.225 – 10.72.86.25410.72.86.255
2510.72.87.0/2710.72.87.1 – 10.72.87.3010.72.87.31
2610.72.87.32/2710.72.87.33 – 10.72.87.6210.72.87.63
2710.72.87.64/2710.72.87.65 – 10.72.87.9410.72.87.95
2810.72.87.96/2710.72.87.97 – 10.72.87.12610.72.87.127
2910.72.87.128/2710.72.87.129 – 10.72.87.15810.72.87.159
3010.72.87.160/2710.72.87.161 – 10.72.87.19010.72.87.191
3110.72.87.192/2710.72.87.193 – 10.72.87.22210.72.87.223
3210.72.87.224/2710.72.87.225 – 10.72.87.25410.72.87.255
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 →