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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)10.1.244.0/22
network10.1.244.0/22
broadcast10.1.247.255
first host10.1.244.1
last host10.1.247.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.1.244.0/22
address00001010.00000001.11110100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00000001.11110100.00000000
broadcast00001010.00000001.11110111.11111111
green = network part, grey = host part
hex0x0a01f400
decimal167900160
reverse dns0.244.1.10.in-addr.arpa
ipv4-mapped::ffff:a01:f400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.1.244.0/2810.1.244.1 – 10.1.244.1410.1.244.15
210.1.244.16/2810.1.244.17 – 10.1.244.3010.1.244.31
310.1.244.32/2810.1.244.33 – 10.1.244.4610.1.244.47
410.1.244.48/2810.1.244.49 – 10.1.244.6210.1.244.63
510.1.244.64/2810.1.244.65 – 10.1.244.7810.1.244.79
610.1.244.80/2810.1.244.81 – 10.1.244.9410.1.244.95
710.1.244.96/2810.1.244.97 – 10.1.244.11010.1.244.111
810.1.244.112/2810.1.244.113 – 10.1.244.12610.1.244.127
910.1.244.128/2810.1.244.129 – 10.1.244.14210.1.244.143
1010.1.244.144/2810.1.244.145 – 10.1.244.15810.1.244.159
1110.1.244.160/2810.1.244.161 – 10.1.244.17410.1.244.175
1210.1.244.176/2810.1.244.177 – 10.1.244.19010.1.244.191
1310.1.244.192/2810.1.244.193 – 10.1.244.20610.1.244.207
1410.1.244.208/2810.1.244.209 – 10.1.244.22210.1.244.223
1510.1.244.224/2810.1.244.225 – 10.1.244.23810.1.244.239
1610.1.244.240/2810.1.244.241 – 10.1.244.25410.1.244.255
1710.1.245.0/2810.1.245.1 – 10.1.245.1410.1.245.15
1810.1.245.16/2810.1.245.17 – 10.1.245.3010.1.245.31
1910.1.245.32/2810.1.245.33 – 10.1.245.4610.1.245.47
2010.1.245.48/2810.1.245.49 – 10.1.245.6210.1.245.63
2110.1.245.64/2810.1.245.65 – 10.1.245.7810.1.245.79
2210.1.245.80/2810.1.245.81 – 10.1.245.9410.1.245.95
2310.1.245.96/2810.1.245.97 – 10.1.245.11010.1.245.111
2410.1.245.112/2810.1.245.113 – 10.1.245.12610.1.245.127
2510.1.245.128/2810.1.245.129 – 10.1.245.14210.1.245.143
2610.1.245.144/2810.1.245.145 – 10.1.245.15810.1.245.159
2710.1.245.160/2810.1.245.161 – 10.1.245.17410.1.245.175
2810.1.245.176/2810.1.245.177 – 10.1.245.19010.1.245.191
2910.1.245.192/2810.1.245.193 – 10.1.245.20610.1.245.207
3010.1.245.208/2810.1.245.209 – 10.1.245.22210.1.245.223
3110.1.245.224/2810.1.245.225 – 10.1.245.23810.1.245.239
3210.1.245.240/2810.1.245.241 – 10.1.245.25410.1.245.255
3310.1.246.0/2810.1.246.1 – 10.1.246.1410.1.246.15
3410.1.246.16/2810.1.246.17 – 10.1.246.3010.1.246.31
3510.1.246.32/2810.1.246.33 – 10.1.246.4610.1.246.47
3610.1.246.48/2810.1.246.49 – 10.1.246.6210.1.246.63
3710.1.246.64/2810.1.246.65 – 10.1.246.7810.1.246.79
3810.1.246.80/2810.1.246.81 – 10.1.246.9410.1.246.95
3910.1.246.96/2810.1.246.97 – 10.1.246.11010.1.246.111
4010.1.246.112/2810.1.246.113 – 10.1.246.12610.1.246.127
4110.1.246.128/2810.1.246.129 – 10.1.246.14210.1.246.143
4210.1.246.144/2810.1.246.145 – 10.1.246.15810.1.246.159
4310.1.246.160/2810.1.246.161 – 10.1.246.17410.1.246.175
4410.1.246.176/2810.1.246.177 – 10.1.246.19010.1.246.191
4510.1.246.192/2810.1.246.193 – 10.1.246.20610.1.246.207
4610.1.246.208/2810.1.246.209 – 10.1.246.22210.1.246.223
4710.1.246.224/2810.1.246.225 – 10.1.246.23810.1.246.239
4810.1.246.240/2810.1.246.241 – 10.1.246.25410.1.246.255
4910.1.247.0/2810.1.247.1 – 10.1.247.1410.1.247.15
5010.1.247.16/2810.1.247.17 – 10.1.247.3010.1.247.31
5110.1.247.32/2810.1.247.33 – 10.1.247.4610.1.247.47
5210.1.247.48/2810.1.247.49 – 10.1.247.6210.1.247.63
5310.1.247.64/2810.1.247.65 – 10.1.247.7810.1.247.79
5410.1.247.80/2810.1.247.81 – 10.1.247.9410.1.247.95
5510.1.247.96/2810.1.247.97 – 10.1.247.11010.1.247.111
5610.1.247.112/2810.1.247.113 – 10.1.247.12610.1.247.127
5710.1.247.128/2810.1.247.129 – 10.1.247.14210.1.247.143
5810.1.247.144/2810.1.247.145 – 10.1.247.15810.1.247.159
5910.1.247.160/2810.1.247.161 – 10.1.247.17410.1.247.175
6010.1.247.176/2810.1.247.177 – 10.1.247.19010.1.247.191
6110.1.247.192/2810.1.247.193 – 10.1.247.20610.1.247.207
6210.1.247.208/2810.1.247.209 – 10.1.247.22210.1.247.223
6310.1.247.224/2810.1.247.225 – 10.1.247.23810.1.247.239
6410.1.247.240/2810.1.247.241 – 10.1.247.25410.1.247.255
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 →