ip
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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)10.44.0.0/22
network10.44.0.0/22
broadcast10.44.3.255
first host10.44.0.1
last host10.44.3.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.44.0.0/22
address00001010.00101100.00000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00101100.00000000.00000000
broadcast00001010.00101100.00000011.11111111
green = network part, grey = host part
hex0x0a2c0000
decimal170655744
reverse dns0.0.44.10.in-addr.arpa
ipv4-mapped::ffff:a2c:0

/22 split into /26 · 16 subnets

close ×
#networkhost rangebroadcast
110.44.0.0/2610.44.0.1 – 10.44.0.6210.44.0.63
210.44.0.64/2610.44.0.65 – 10.44.0.12610.44.0.127
310.44.0.128/2610.44.0.129 – 10.44.0.19010.44.0.191
410.44.0.192/2610.44.0.193 – 10.44.0.25410.44.0.255
510.44.1.0/2610.44.1.1 – 10.44.1.6210.44.1.63
610.44.1.64/2610.44.1.65 – 10.44.1.12610.44.1.127
710.44.1.128/2610.44.1.129 – 10.44.1.19010.44.1.191
810.44.1.192/2610.44.1.193 – 10.44.1.25410.44.1.255
910.44.2.0/2610.44.2.1 – 10.44.2.6210.44.2.63
1010.44.2.64/2610.44.2.65 – 10.44.2.12610.44.2.127
1110.44.2.128/2610.44.2.129 – 10.44.2.19010.44.2.191
1210.44.2.192/2610.44.2.193 – 10.44.2.25410.44.2.255
1310.44.3.0/2610.44.3.1 – 10.44.3.6210.44.3.63
1410.44.3.64/2610.44.3.65 – 10.44.3.12610.44.3.127
1510.44.3.128/2610.44.3.129 – 10.44.3.19010.44.3.191
1610.44.3.192/2610.44.3.193 – 10.44.3.25410.44.3.255
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 →