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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)10.232.162.0/23
network10.232.162.0/23
broadcast10.232.163.255
first host10.232.162.1
last host10.232.163.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.232.162.0/23
address00001010.11101000.10100010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11101000.10100010.00000000
broadcast00001010.11101000.10100011.11111111
green = network part, grey = host part
hex0x0ae8a200
decimal183017984
reverse dns0.162.232.10.in-addr.arpa
ipv4-mapped::ffff:ae8:a200

/23 split into /28 · 32 subnets

close ×
#networkhost rangebroadcast
110.232.162.0/2810.232.162.1 – 10.232.162.1410.232.162.15
210.232.162.16/2810.232.162.17 – 10.232.162.3010.232.162.31
310.232.162.32/2810.232.162.33 – 10.232.162.4610.232.162.47
410.232.162.48/2810.232.162.49 – 10.232.162.6210.232.162.63
510.232.162.64/2810.232.162.65 – 10.232.162.7810.232.162.79
610.232.162.80/2810.232.162.81 – 10.232.162.9410.232.162.95
710.232.162.96/2810.232.162.97 – 10.232.162.11010.232.162.111
810.232.162.112/2810.232.162.113 – 10.232.162.12610.232.162.127
910.232.162.128/2810.232.162.129 – 10.232.162.14210.232.162.143
1010.232.162.144/2810.232.162.145 – 10.232.162.15810.232.162.159
1110.232.162.160/2810.232.162.161 – 10.232.162.17410.232.162.175
1210.232.162.176/2810.232.162.177 – 10.232.162.19010.232.162.191
1310.232.162.192/2810.232.162.193 – 10.232.162.20610.232.162.207
1410.232.162.208/2810.232.162.209 – 10.232.162.22210.232.162.223
1510.232.162.224/2810.232.162.225 – 10.232.162.23810.232.162.239
1610.232.162.240/2810.232.162.241 – 10.232.162.25410.232.162.255
1710.232.163.0/2810.232.163.1 – 10.232.163.1410.232.163.15
1810.232.163.16/2810.232.163.17 – 10.232.163.3010.232.163.31
1910.232.163.32/2810.232.163.33 – 10.232.163.4610.232.163.47
2010.232.163.48/2810.232.163.49 – 10.232.163.6210.232.163.63
2110.232.163.64/2810.232.163.65 – 10.232.163.7810.232.163.79
2210.232.163.80/2810.232.163.81 – 10.232.163.9410.232.163.95
2310.232.163.96/2810.232.163.97 – 10.232.163.11010.232.163.111
2410.232.163.112/2810.232.163.113 – 10.232.163.12610.232.163.127
2510.232.163.128/2810.232.163.129 – 10.232.163.14210.232.163.143
2610.232.163.144/2810.232.163.145 – 10.232.163.15810.232.163.159
2710.232.163.160/2810.232.163.161 – 10.232.163.17410.232.163.175
2810.232.163.176/2810.232.163.177 – 10.232.163.19010.232.163.191
2910.232.163.192/2810.232.163.193 – 10.232.163.20610.232.163.207
3010.232.163.208/2810.232.163.209 – 10.232.163.22210.232.163.223
3110.232.163.224/2810.232.163.225 – 10.232.163.23810.232.163.239
3210.232.163.240/2810.232.163.241 – 10.232.163.25410.232.163.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /23
/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-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →