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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)10.72.152.0/22
network10.72.152.0/22
broadcast10.72.155.255
first host10.72.152.1
last host10.72.155.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.72.152.0/22
address00001010.01001000.10011000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001000.10011000.00000000
broadcast00001010.01001000.10011011.11111111
green = network part, grey = host part
hex0x0a489800
decimal172529664
reverse dns0.152.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:9800

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.72.152.0/2710.72.152.1 – 10.72.152.3010.72.152.31
210.72.152.32/2710.72.152.33 – 10.72.152.6210.72.152.63
310.72.152.64/2710.72.152.65 – 10.72.152.9410.72.152.95
410.72.152.96/2710.72.152.97 – 10.72.152.12610.72.152.127
510.72.152.128/2710.72.152.129 – 10.72.152.15810.72.152.159
610.72.152.160/2710.72.152.161 – 10.72.152.19010.72.152.191
710.72.152.192/2710.72.152.193 – 10.72.152.22210.72.152.223
810.72.152.224/2710.72.152.225 – 10.72.152.25410.72.152.255
910.72.153.0/2710.72.153.1 – 10.72.153.3010.72.153.31
1010.72.153.32/2710.72.153.33 – 10.72.153.6210.72.153.63
1110.72.153.64/2710.72.153.65 – 10.72.153.9410.72.153.95
1210.72.153.96/2710.72.153.97 – 10.72.153.12610.72.153.127
1310.72.153.128/2710.72.153.129 – 10.72.153.15810.72.153.159
1410.72.153.160/2710.72.153.161 – 10.72.153.19010.72.153.191
1510.72.153.192/2710.72.153.193 – 10.72.153.22210.72.153.223
1610.72.153.224/2710.72.153.225 – 10.72.153.25410.72.153.255
1710.72.154.0/2710.72.154.1 – 10.72.154.3010.72.154.31
1810.72.154.32/2710.72.154.33 – 10.72.154.6210.72.154.63
1910.72.154.64/2710.72.154.65 – 10.72.154.9410.72.154.95
2010.72.154.96/2710.72.154.97 – 10.72.154.12610.72.154.127
2110.72.154.128/2710.72.154.129 – 10.72.154.15810.72.154.159
2210.72.154.160/2710.72.154.161 – 10.72.154.19010.72.154.191
2310.72.154.192/2710.72.154.193 – 10.72.154.22210.72.154.223
2410.72.154.224/2710.72.154.225 – 10.72.154.25410.72.154.255
2510.72.155.0/2710.72.155.1 – 10.72.155.3010.72.155.31
2610.72.155.32/2710.72.155.33 – 10.72.155.6210.72.155.63
2710.72.155.64/2710.72.155.65 – 10.72.155.9410.72.155.95
2810.72.155.96/2710.72.155.97 – 10.72.155.12610.72.155.127
2910.72.155.128/2710.72.155.129 – 10.72.155.15810.72.155.159
3010.72.155.160/2710.72.155.161 – 10.72.155.19010.72.155.191
3110.72.155.192/2710.72.155.193 – 10.72.155.22210.72.155.223
3210.72.155.224/2710.72.155.225 – 10.72.155.25410.72.155.255
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 →