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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)10.30.80.0/22
network10.30.80.0/22
broadcast10.30.83.255
first host10.30.80.1
last host10.30.83.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.30.80.0/22
address00001010.00011110.01010000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00011110.01010000.00000000
broadcast00001010.00011110.01010011.11111111
green = network part, grey = host part
hex0x0a1e5000
decimal169758720
reverse dns0.80.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:5000

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.30.80.0/2710.30.80.1 – 10.30.80.3010.30.80.31
210.30.80.32/2710.30.80.33 – 10.30.80.6210.30.80.63
310.30.80.64/2710.30.80.65 – 10.30.80.9410.30.80.95
410.30.80.96/2710.30.80.97 – 10.30.80.12610.30.80.127
510.30.80.128/2710.30.80.129 – 10.30.80.15810.30.80.159
610.30.80.160/2710.30.80.161 – 10.30.80.19010.30.80.191
710.30.80.192/2710.30.80.193 – 10.30.80.22210.30.80.223
810.30.80.224/2710.30.80.225 – 10.30.80.25410.30.80.255
910.30.81.0/2710.30.81.1 – 10.30.81.3010.30.81.31
1010.30.81.32/2710.30.81.33 – 10.30.81.6210.30.81.63
1110.30.81.64/2710.30.81.65 – 10.30.81.9410.30.81.95
1210.30.81.96/2710.30.81.97 – 10.30.81.12610.30.81.127
1310.30.81.128/2710.30.81.129 – 10.30.81.15810.30.81.159
1410.30.81.160/2710.30.81.161 – 10.30.81.19010.30.81.191
1510.30.81.192/2710.30.81.193 – 10.30.81.22210.30.81.223
1610.30.81.224/2710.30.81.225 – 10.30.81.25410.30.81.255
1710.30.82.0/2710.30.82.1 – 10.30.82.3010.30.82.31
1810.30.82.32/2710.30.82.33 – 10.30.82.6210.30.82.63
1910.30.82.64/2710.30.82.65 – 10.30.82.9410.30.82.95
2010.30.82.96/2710.30.82.97 – 10.30.82.12610.30.82.127
2110.30.82.128/2710.30.82.129 – 10.30.82.15810.30.82.159
2210.30.82.160/2710.30.82.161 – 10.30.82.19010.30.82.191
2310.30.82.192/2710.30.82.193 – 10.30.82.22210.30.82.223
2410.30.82.224/2710.30.82.225 – 10.30.82.25410.30.82.255
2510.30.83.0/2710.30.83.1 – 10.30.83.3010.30.83.31
2610.30.83.32/2710.30.83.33 – 10.30.83.6210.30.83.63
2710.30.83.64/2710.30.83.65 – 10.30.83.9410.30.83.95
2810.30.83.96/2710.30.83.97 – 10.30.83.12610.30.83.127
2910.30.83.128/2710.30.83.129 – 10.30.83.15810.30.83.159
3010.30.83.160/2710.30.83.161 – 10.30.83.19010.30.83.191
3110.30.83.192/2710.30.83.193 – 10.30.83.22210.30.83.223
3210.30.83.224/2710.30.83.225 – 10.30.83.25410.30.83.255
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 →