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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)10.237.36.0/22
network10.237.36.0/22
broadcast10.237.39.255
first host10.237.36.1
last host10.237.39.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.237.36.0/22
address00001010.11101101.00100100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.11101101.00100100.00000000
broadcast00001010.11101101.00100111.11111111
green = network part, grey = host part
hex0x0aed2400
decimal183313408
reverse dns0.36.237.10.in-addr.arpa
ipv4-mapped::ffff:aed:2400

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.237.36.0/2710.237.36.1 – 10.237.36.3010.237.36.31
210.237.36.32/2710.237.36.33 – 10.237.36.6210.237.36.63
310.237.36.64/2710.237.36.65 – 10.237.36.9410.237.36.95
410.237.36.96/2710.237.36.97 – 10.237.36.12610.237.36.127
510.237.36.128/2710.237.36.129 – 10.237.36.15810.237.36.159
610.237.36.160/2710.237.36.161 – 10.237.36.19010.237.36.191
710.237.36.192/2710.237.36.193 – 10.237.36.22210.237.36.223
810.237.36.224/2710.237.36.225 – 10.237.36.25410.237.36.255
910.237.37.0/2710.237.37.1 – 10.237.37.3010.237.37.31
1010.237.37.32/2710.237.37.33 – 10.237.37.6210.237.37.63
1110.237.37.64/2710.237.37.65 – 10.237.37.9410.237.37.95
1210.237.37.96/2710.237.37.97 – 10.237.37.12610.237.37.127
1310.237.37.128/2710.237.37.129 – 10.237.37.15810.237.37.159
1410.237.37.160/2710.237.37.161 – 10.237.37.19010.237.37.191
1510.237.37.192/2710.237.37.193 – 10.237.37.22210.237.37.223
1610.237.37.224/2710.237.37.225 – 10.237.37.25410.237.37.255
1710.237.38.0/2710.237.38.1 – 10.237.38.3010.237.38.31
1810.237.38.32/2710.237.38.33 – 10.237.38.6210.237.38.63
1910.237.38.64/2710.237.38.65 – 10.237.38.9410.237.38.95
2010.237.38.96/2710.237.38.97 – 10.237.38.12610.237.38.127
2110.237.38.128/2710.237.38.129 – 10.237.38.15810.237.38.159
2210.237.38.160/2710.237.38.161 – 10.237.38.19010.237.38.191
2310.237.38.192/2710.237.38.193 – 10.237.38.22210.237.38.223
2410.237.38.224/2710.237.38.225 – 10.237.38.25410.237.38.255
2510.237.39.0/2710.237.39.1 – 10.237.39.3010.237.39.31
2610.237.39.32/2710.237.39.33 – 10.237.39.6210.237.39.63
2710.237.39.64/2710.237.39.65 – 10.237.39.9410.237.39.95
2810.237.39.96/2710.237.39.97 – 10.237.39.12610.237.39.127
2910.237.39.128/2710.237.39.129 – 10.237.39.15810.237.39.159
3010.237.39.160/2710.237.39.161 – 10.237.39.19010.237.39.191
3110.237.39.192/2710.237.39.193 – 10.237.39.22210.237.39.223
3210.237.39.224/2710.237.39.225 – 10.237.39.25410.237.39.255
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 →