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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)10.78.44.0/22
network10.78.44.0/22
broadcast10.78.47.255
first host10.78.44.1
last host10.78.47.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.78.44.0/22
address00001010.01001110.00101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01001110.00101100.00000000
broadcast00001010.01001110.00101111.11111111
green = network part, grey = host part
hex0x0a4e2c00
decimal172895232
reverse dns0.44.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2c00

/22 split into /27 · 32 subnets

close ×
#networkhost rangebroadcast
110.78.44.0/2710.78.44.1 – 10.78.44.3010.78.44.31
210.78.44.32/2710.78.44.33 – 10.78.44.6210.78.44.63
310.78.44.64/2710.78.44.65 – 10.78.44.9410.78.44.95
410.78.44.96/2710.78.44.97 – 10.78.44.12610.78.44.127
510.78.44.128/2710.78.44.129 – 10.78.44.15810.78.44.159
610.78.44.160/2710.78.44.161 – 10.78.44.19010.78.44.191
710.78.44.192/2710.78.44.193 – 10.78.44.22210.78.44.223
810.78.44.224/2710.78.44.225 – 10.78.44.25410.78.44.255
910.78.45.0/2710.78.45.1 – 10.78.45.3010.78.45.31
1010.78.45.32/2710.78.45.33 – 10.78.45.6210.78.45.63
1110.78.45.64/2710.78.45.65 – 10.78.45.9410.78.45.95
1210.78.45.96/2710.78.45.97 – 10.78.45.12610.78.45.127
1310.78.45.128/2710.78.45.129 – 10.78.45.15810.78.45.159
1410.78.45.160/2710.78.45.161 – 10.78.45.19010.78.45.191
1510.78.45.192/2710.78.45.193 – 10.78.45.22210.78.45.223
1610.78.45.224/2710.78.45.225 – 10.78.45.25410.78.45.255
1710.78.46.0/2710.78.46.1 – 10.78.46.3010.78.46.31
1810.78.46.32/2710.78.46.33 – 10.78.46.6210.78.46.63
1910.78.46.64/2710.78.46.65 – 10.78.46.9410.78.46.95
2010.78.46.96/2710.78.46.97 – 10.78.46.12610.78.46.127
2110.78.46.128/2710.78.46.129 – 10.78.46.15810.78.46.159
2210.78.46.160/2710.78.46.161 – 10.78.46.19010.78.46.191
2310.78.46.192/2710.78.46.193 – 10.78.46.22210.78.46.223
2410.78.46.224/2710.78.46.225 – 10.78.46.25410.78.46.255
2510.78.47.0/2710.78.47.1 – 10.78.47.3010.78.47.31
2610.78.47.32/2710.78.47.33 – 10.78.47.6210.78.47.63
2710.78.47.64/2710.78.47.65 – 10.78.47.9410.78.47.95
2810.78.47.96/2710.78.47.97 – 10.78.47.12610.78.47.127
2910.78.47.128/2710.78.47.129 – 10.78.47.15810.78.47.159
3010.78.47.160/2710.78.47.161 – 10.78.47.19010.78.47.191
3110.78.47.192/2710.78.47.193 – 10.78.47.22210.78.47.223
3210.78.47.224/2710.78.47.225 – 10.78.47.25410.78.47.255
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 →