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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)10.151.22.0/24
network10.151.22.0/24
broadcast10.151.22.255
first host10.151.22.1
last host10.151.22.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.151.22.0/24
address00001010.10010111.00010110.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.10010111.00010110.00000000
broadcast00001010.10010111.00010110.11111111
green = network part, grey = host part
hex0x0a971600
decimal177673728
reverse dns0.22.151.10.in-addr.arpa
ipv4-mapped::ffff:a97:1600

/24 split into /28 · 16 subnets

close ×
#networkhost rangebroadcast
110.151.22.0/2810.151.22.1 – 10.151.22.1410.151.22.15
210.151.22.16/2810.151.22.17 – 10.151.22.3010.151.22.31
310.151.22.32/2810.151.22.33 – 10.151.22.4610.151.22.47
410.151.22.48/2810.151.22.49 – 10.151.22.6210.151.22.63
510.151.22.64/2810.151.22.65 – 10.151.22.7810.151.22.79
610.151.22.80/2810.151.22.81 – 10.151.22.9410.151.22.95
710.151.22.96/2810.151.22.97 – 10.151.22.11010.151.22.111
810.151.22.112/2810.151.22.113 – 10.151.22.12610.151.22.127
910.151.22.128/2810.151.22.129 – 10.151.22.14210.151.22.143
1010.151.22.144/2810.151.22.145 – 10.151.22.15810.151.22.159
1110.151.22.160/2810.151.22.161 – 10.151.22.17410.151.22.175
1210.151.22.176/2810.151.22.177 – 10.151.22.19010.151.22.191
1310.151.22.192/2810.151.22.193 – 10.151.22.20610.151.22.207
1410.151.22.208/2810.151.22.209 – 10.151.22.22210.151.22.223
1510.151.22.224/2810.151.22.225 – 10.151.22.23810.151.22.239
1610.151.22.240/2810.151.22.241 – 10.151.22.25410.151.22.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /24
/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-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →