ip
ipku.in

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)10.158.4.48/28
network10.158.4.48/28
broadcast10.158.4.63
first host10.158.4.49
last host10.158.4.62
subnet mask255.255.255.240
wildcard0.0.0.15
addresses16
usable hosts14
classA
ipcalc 10.158.4.48/28
address00001010.10011110.00000100.00110000
subnet mask11111111.11111111.11111111.11110000
network00001010.10011110.00000100.00110000
broadcast00001010.10011110.00000100.00111111
green = network part, grey = host part
hex0x0a9e0430
decimal178127920
reverse dns48.4.158.10.in-addr.arpa
ipv4-mapped::ffff:a9e:430

/28 split into /32 · 16 subnets

close ×
#networkhost rangebroadcast
110.158.4.48/3210.158.4.48 – 10.158.4.4810.158.4.48
210.158.4.49/3210.158.4.49 – 10.158.4.4910.158.4.49
310.158.4.50/3210.158.4.50 – 10.158.4.5010.158.4.50
410.158.4.51/3210.158.4.51 – 10.158.4.5110.158.4.51
510.158.4.52/3210.158.4.52 – 10.158.4.5210.158.4.52
610.158.4.53/3210.158.4.53 – 10.158.4.5310.158.4.53
710.158.4.54/3210.158.4.54 – 10.158.4.5410.158.4.54
810.158.4.55/3210.158.4.55 – 10.158.4.5510.158.4.55
910.158.4.56/3210.158.4.56 – 10.158.4.5610.158.4.56
1010.158.4.57/3210.158.4.57 – 10.158.4.5710.158.4.57
1110.158.4.58/3210.158.4.58 – 10.158.4.5810.158.4.58
1210.158.4.59/3210.158.4.59 – 10.158.4.5910.158.4.59
1310.158.4.60/3210.158.4.60 – 10.158.4.6010.158.4.60
1410.158.4.61/3210.158.4.61 – 10.158.4.6110.158.4.61
1510.158.4.62/3210.158.4.62 – 10.158.4.6210.158.4.62
1610.158.4.63/3210.158.4.63 – 10.158.4.6310.158.4.63
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /28
/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-
/22255.255.252.01,0241,022-
/23255.255.254.0512510-
/24255.255.255.0256254-
/25255.255.255.128128126-
/26255.255.255.1926462-
/27255.255.255.2243230-
/28255.255.255.24016141
/29255.255.255.248862 split →
/30255.255.255.252424 split →
/31255.255.255.254228 split →
/32255.255.255.2551116 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 →