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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)10.158.20.0/22
network10.158.20.0/22
broadcast10.158.23.255
first host10.158.20.1
last host10.158.23.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.158.20.0/22
address00001010.10011110.00010100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10011110.00010100.00000000
broadcast00001010.10011110.00010111.11111111
green = network part, grey = host part
hex0x0a9e1400
decimal178131968
reverse dns0.20.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:1400

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.158.20.0/2710.158.20.1 – 10.158.20.3010.158.20.31
210.158.20.32/2710.158.20.33 – 10.158.20.6210.158.20.63
310.158.20.64/2710.158.20.65 – 10.158.20.9410.158.20.95
410.158.20.96/2710.158.20.97 – 10.158.20.12610.158.20.127
510.158.20.128/2710.158.20.129 – 10.158.20.15810.158.20.159
610.158.20.160/2710.158.20.161 – 10.158.20.19010.158.20.191
710.158.20.192/2710.158.20.193 – 10.158.20.22210.158.20.223
810.158.20.224/2710.158.20.225 – 10.158.20.25410.158.20.255
910.158.21.0/2710.158.21.1 – 10.158.21.3010.158.21.31
1010.158.21.32/2710.158.21.33 – 10.158.21.6210.158.21.63
1110.158.21.64/2710.158.21.65 – 10.158.21.9410.158.21.95
1210.158.21.96/2710.158.21.97 – 10.158.21.12610.158.21.127
1310.158.21.128/2710.158.21.129 – 10.158.21.15810.158.21.159
1410.158.21.160/2710.158.21.161 – 10.158.21.19010.158.21.191
1510.158.21.192/2710.158.21.193 – 10.158.21.22210.158.21.223
1610.158.21.224/2710.158.21.225 – 10.158.21.25410.158.21.255
1710.158.22.0/2710.158.22.1 – 10.158.22.3010.158.22.31
1810.158.22.32/2710.158.22.33 – 10.158.22.6210.158.22.63
1910.158.22.64/2710.158.22.65 – 10.158.22.9410.158.22.95
2010.158.22.96/2710.158.22.97 – 10.158.22.12610.158.22.127
2110.158.22.128/2710.158.22.129 – 10.158.22.15810.158.22.159
2210.158.22.160/2710.158.22.161 – 10.158.22.19010.158.22.191
2310.158.22.192/2710.158.22.193 – 10.158.22.22210.158.22.223
2410.158.22.224/2710.158.22.225 – 10.158.22.25410.158.22.255
2510.158.23.0/2710.158.23.1 – 10.158.23.3010.158.23.31
2610.158.23.32/2710.158.23.33 – 10.158.23.6210.158.23.63
2710.158.23.64/2710.158.23.65 – 10.158.23.9410.158.23.95
2810.158.23.96/2710.158.23.97 – 10.158.23.12610.158.23.127
2910.158.23.128/2710.158.23.129 – 10.158.23.15810.158.23.159
3010.158.23.160/2710.158.23.161 – 10.158.23.19010.158.23.191
3110.158.23.192/2710.158.23.193 – 10.158.23.22210.158.23.223
3210.158.23.224/2710.158.23.225 – 10.158.23.25410.158.23.255
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 →