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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)10.185.64.0/22
network10.185.64.0/22
broadcast10.185.67.255
first host10.185.64.1
last host10.185.67.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.185.64.0/22
address00001010.10111001.01000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10111001.01000000.00000000
broadcast00001010.10111001.01000011.11111111
green = network part, grey = host part
hex0x0ab94000
decimal179912704
reverse dns0.64.185.10.in-addr.arpa
ipv4-mapped::ffff:ab9:4000

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.185.64.0/2710.185.64.1 – 10.185.64.3010.185.64.31
210.185.64.32/2710.185.64.33 – 10.185.64.6210.185.64.63
310.185.64.64/2710.185.64.65 – 10.185.64.9410.185.64.95
410.185.64.96/2710.185.64.97 – 10.185.64.12610.185.64.127
510.185.64.128/2710.185.64.129 – 10.185.64.15810.185.64.159
610.185.64.160/2710.185.64.161 – 10.185.64.19010.185.64.191
710.185.64.192/2710.185.64.193 – 10.185.64.22210.185.64.223
810.185.64.224/2710.185.64.225 – 10.185.64.25410.185.64.255
910.185.65.0/2710.185.65.1 – 10.185.65.3010.185.65.31
1010.185.65.32/2710.185.65.33 – 10.185.65.6210.185.65.63
1110.185.65.64/2710.185.65.65 – 10.185.65.9410.185.65.95
1210.185.65.96/2710.185.65.97 – 10.185.65.12610.185.65.127
1310.185.65.128/2710.185.65.129 – 10.185.65.15810.185.65.159
1410.185.65.160/2710.185.65.161 – 10.185.65.19010.185.65.191
1510.185.65.192/2710.185.65.193 – 10.185.65.22210.185.65.223
1610.185.65.224/2710.185.65.225 – 10.185.65.25410.185.65.255
1710.185.66.0/2710.185.66.1 – 10.185.66.3010.185.66.31
1810.185.66.32/2710.185.66.33 – 10.185.66.6210.185.66.63
1910.185.66.64/2710.185.66.65 – 10.185.66.9410.185.66.95
2010.185.66.96/2710.185.66.97 – 10.185.66.12610.185.66.127
2110.185.66.128/2710.185.66.129 – 10.185.66.15810.185.66.159
2210.185.66.160/2710.185.66.161 – 10.185.66.19010.185.66.191
2310.185.66.192/2710.185.66.193 – 10.185.66.22210.185.66.223
2410.185.66.224/2710.185.66.225 – 10.185.66.25410.185.66.255
2510.185.67.0/2710.185.67.1 – 10.185.67.3010.185.67.31
2610.185.67.32/2710.185.67.33 – 10.185.67.6210.185.67.63
2710.185.67.64/2710.185.67.65 – 10.185.67.9410.185.67.95
2810.185.67.96/2710.185.67.97 – 10.185.67.12610.185.67.127
2910.185.67.128/2710.185.67.129 – 10.185.67.15810.185.67.159
3010.185.67.160/2710.185.67.161 – 10.185.67.19010.185.67.191
3110.185.67.192/2710.185.67.193 – 10.185.67.22210.185.67.223
3210.185.67.224/2710.185.67.225 – 10.185.67.25410.185.67.255
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 →