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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)10.1.24.0/22
network10.1.24.0/22
broadcast10.1.27.255
first host10.1.24.1
last host10.1.27.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.1.24.0/22
address00001010.00000001.00011000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000001.00011000.00000000
broadcast00001010.00000001.00011011.11111111
green = network part, grey = host part
hex0x0a011800
decimal167843840
reverse dns0.24.1.10.in-addr.arpa
ipv4-mapped::ffff:a01:1800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.1.24.0/2810.1.24.1 – 10.1.24.1410.1.24.15
210.1.24.16/2810.1.24.17 – 10.1.24.3010.1.24.31
310.1.24.32/2810.1.24.33 – 10.1.24.4610.1.24.47
410.1.24.48/2810.1.24.49 – 10.1.24.6210.1.24.63
510.1.24.64/2810.1.24.65 – 10.1.24.7810.1.24.79
610.1.24.80/2810.1.24.81 – 10.1.24.9410.1.24.95
710.1.24.96/2810.1.24.97 – 10.1.24.11010.1.24.111
810.1.24.112/2810.1.24.113 – 10.1.24.12610.1.24.127
910.1.24.128/2810.1.24.129 – 10.1.24.14210.1.24.143
1010.1.24.144/2810.1.24.145 – 10.1.24.15810.1.24.159
1110.1.24.160/2810.1.24.161 – 10.1.24.17410.1.24.175
1210.1.24.176/2810.1.24.177 – 10.1.24.19010.1.24.191
1310.1.24.192/2810.1.24.193 – 10.1.24.20610.1.24.207
1410.1.24.208/2810.1.24.209 – 10.1.24.22210.1.24.223
1510.1.24.224/2810.1.24.225 – 10.1.24.23810.1.24.239
1610.1.24.240/2810.1.24.241 – 10.1.24.25410.1.24.255
1710.1.25.0/2810.1.25.1 – 10.1.25.1410.1.25.15
1810.1.25.16/2810.1.25.17 – 10.1.25.3010.1.25.31
1910.1.25.32/2810.1.25.33 – 10.1.25.4610.1.25.47
2010.1.25.48/2810.1.25.49 – 10.1.25.6210.1.25.63
2110.1.25.64/2810.1.25.65 – 10.1.25.7810.1.25.79
2210.1.25.80/2810.1.25.81 – 10.1.25.9410.1.25.95
2310.1.25.96/2810.1.25.97 – 10.1.25.11010.1.25.111
2410.1.25.112/2810.1.25.113 – 10.1.25.12610.1.25.127
2510.1.25.128/2810.1.25.129 – 10.1.25.14210.1.25.143
2610.1.25.144/2810.1.25.145 – 10.1.25.15810.1.25.159
2710.1.25.160/2810.1.25.161 – 10.1.25.17410.1.25.175
2810.1.25.176/2810.1.25.177 – 10.1.25.19010.1.25.191
2910.1.25.192/2810.1.25.193 – 10.1.25.20610.1.25.207
3010.1.25.208/2810.1.25.209 – 10.1.25.22210.1.25.223
3110.1.25.224/2810.1.25.225 – 10.1.25.23810.1.25.239
3210.1.25.240/2810.1.25.241 – 10.1.25.25410.1.25.255
3310.1.26.0/2810.1.26.1 – 10.1.26.1410.1.26.15
3410.1.26.16/2810.1.26.17 – 10.1.26.3010.1.26.31
3510.1.26.32/2810.1.26.33 – 10.1.26.4610.1.26.47
3610.1.26.48/2810.1.26.49 – 10.1.26.6210.1.26.63
3710.1.26.64/2810.1.26.65 – 10.1.26.7810.1.26.79
3810.1.26.80/2810.1.26.81 – 10.1.26.9410.1.26.95
3910.1.26.96/2810.1.26.97 – 10.1.26.11010.1.26.111
4010.1.26.112/2810.1.26.113 – 10.1.26.12610.1.26.127
4110.1.26.128/2810.1.26.129 – 10.1.26.14210.1.26.143
4210.1.26.144/2810.1.26.145 – 10.1.26.15810.1.26.159
4310.1.26.160/2810.1.26.161 – 10.1.26.17410.1.26.175
4410.1.26.176/2810.1.26.177 – 10.1.26.19010.1.26.191
4510.1.26.192/2810.1.26.193 – 10.1.26.20610.1.26.207
4610.1.26.208/2810.1.26.209 – 10.1.26.22210.1.26.223
4710.1.26.224/2810.1.26.225 – 10.1.26.23810.1.26.239
4810.1.26.240/2810.1.26.241 – 10.1.26.25410.1.26.255
4910.1.27.0/2810.1.27.1 – 10.1.27.1410.1.27.15
5010.1.27.16/2810.1.27.17 – 10.1.27.3010.1.27.31
5110.1.27.32/2810.1.27.33 – 10.1.27.4610.1.27.47
5210.1.27.48/2810.1.27.49 – 10.1.27.6210.1.27.63
5310.1.27.64/2810.1.27.65 – 10.1.27.7810.1.27.79
5410.1.27.80/2810.1.27.81 – 10.1.27.9410.1.27.95
5510.1.27.96/2810.1.27.97 – 10.1.27.11010.1.27.111
5610.1.27.112/2810.1.27.113 – 10.1.27.12610.1.27.127
5710.1.27.128/2810.1.27.129 – 10.1.27.14210.1.27.143
5810.1.27.144/2810.1.27.145 – 10.1.27.15810.1.27.159
5910.1.27.160/2810.1.27.161 – 10.1.27.17410.1.27.175
6010.1.27.176/2810.1.27.177 – 10.1.27.19010.1.27.191
6110.1.27.192/2810.1.27.193 – 10.1.27.20610.1.27.207
6210.1.27.208/2810.1.27.209 – 10.1.27.22210.1.27.223
6310.1.27.224/2810.1.27.225 – 10.1.27.23810.1.27.239
6410.1.27.240/2810.1.27.241 – 10.1.27.25410.1.27.255
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 →