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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)10.37.8.0/22
network10.37.8.0/22
broadcast10.37.11.255
first host10.37.8.1
last host10.37.11.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.37.8.0/22
address00001010.00100101.00001000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00100101.00001000.00000000
broadcast00001010.00100101.00001011.11111111
green = network part, grey = host part
hex0x0a250800
decimal170199040
reverse dns0.8.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.37.8.0/2810.37.8.1 – 10.37.8.1410.37.8.15
210.37.8.16/2810.37.8.17 – 10.37.8.3010.37.8.31
310.37.8.32/2810.37.8.33 – 10.37.8.4610.37.8.47
410.37.8.48/2810.37.8.49 – 10.37.8.6210.37.8.63
510.37.8.64/2810.37.8.65 – 10.37.8.7810.37.8.79
610.37.8.80/2810.37.8.81 – 10.37.8.9410.37.8.95
710.37.8.96/2810.37.8.97 – 10.37.8.11010.37.8.111
810.37.8.112/2810.37.8.113 – 10.37.8.12610.37.8.127
910.37.8.128/2810.37.8.129 – 10.37.8.14210.37.8.143
1010.37.8.144/2810.37.8.145 – 10.37.8.15810.37.8.159
1110.37.8.160/2810.37.8.161 – 10.37.8.17410.37.8.175
1210.37.8.176/2810.37.8.177 – 10.37.8.19010.37.8.191
1310.37.8.192/2810.37.8.193 – 10.37.8.20610.37.8.207
1410.37.8.208/2810.37.8.209 – 10.37.8.22210.37.8.223
1510.37.8.224/2810.37.8.225 – 10.37.8.23810.37.8.239
1610.37.8.240/2810.37.8.241 – 10.37.8.25410.37.8.255
1710.37.9.0/2810.37.9.1 – 10.37.9.1410.37.9.15
1810.37.9.16/2810.37.9.17 – 10.37.9.3010.37.9.31
1910.37.9.32/2810.37.9.33 – 10.37.9.4610.37.9.47
2010.37.9.48/2810.37.9.49 – 10.37.9.6210.37.9.63
2110.37.9.64/2810.37.9.65 – 10.37.9.7810.37.9.79
2210.37.9.80/2810.37.9.81 – 10.37.9.9410.37.9.95
2310.37.9.96/2810.37.9.97 – 10.37.9.11010.37.9.111
2410.37.9.112/2810.37.9.113 – 10.37.9.12610.37.9.127
2510.37.9.128/2810.37.9.129 – 10.37.9.14210.37.9.143
2610.37.9.144/2810.37.9.145 – 10.37.9.15810.37.9.159
2710.37.9.160/2810.37.9.161 – 10.37.9.17410.37.9.175
2810.37.9.176/2810.37.9.177 – 10.37.9.19010.37.9.191
2910.37.9.192/2810.37.9.193 – 10.37.9.20610.37.9.207
3010.37.9.208/2810.37.9.209 – 10.37.9.22210.37.9.223
3110.37.9.224/2810.37.9.225 – 10.37.9.23810.37.9.239
3210.37.9.240/2810.37.9.241 – 10.37.9.25410.37.9.255
3310.37.10.0/2810.37.10.1 – 10.37.10.1410.37.10.15
3410.37.10.16/2810.37.10.17 – 10.37.10.3010.37.10.31
3510.37.10.32/2810.37.10.33 – 10.37.10.4610.37.10.47
3610.37.10.48/2810.37.10.49 – 10.37.10.6210.37.10.63
3710.37.10.64/2810.37.10.65 – 10.37.10.7810.37.10.79
3810.37.10.80/2810.37.10.81 – 10.37.10.9410.37.10.95
3910.37.10.96/2810.37.10.97 – 10.37.10.11010.37.10.111
4010.37.10.112/2810.37.10.113 – 10.37.10.12610.37.10.127
4110.37.10.128/2810.37.10.129 – 10.37.10.14210.37.10.143
4210.37.10.144/2810.37.10.145 – 10.37.10.15810.37.10.159
4310.37.10.160/2810.37.10.161 – 10.37.10.17410.37.10.175
4410.37.10.176/2810.37.10.177 – 10.37.10.19010.37.10.191
4510.37.10.192/2810.37.10.193 – 10.37.10.20610.37.10.207
4610.37.10.208/2810.37.10.209 – 10.37.10.22210.37.10.223
4710.37.10.224/2810.37.10.225 – 10.37.10.23810.37.10.239
4810.37.10.240/2810.37.10.241 – 10.37.10.25410.37.10.255
4910.37.11.0/2810.37.11.1 – 10.37.11.1410.37.11.15
5010.37.11.16/2810.37.11.17 – 10.37.11.3010.37.11.31
5110.37.11.32/2810.37.11.33 – 10.37.11.4610.37.11.47
5210.37.11.48/2810.37.11.49 – 10.37.11.6210.37.11.63
5310.37.11.64/2810.37.11.65 – 10.37.11.7810.37.11.79
5410.37.11.80/2810.37.11.81 – 10.37.11.9410.37.11.95
5510.37.11.96/2810.37.11.97 – 10.37.11.11010.37.11.111
5610.37.11.112/2810.37.11.113 – 10.37.11.12610.37.11.127
5710.37.11.128/2810.37.11.129 – 10.37.11.14210.37.11.143
5810.37.11.144/2810.37.11.145 – 10.37.11.15810.37.11.159
5910.37.11.160/2810.37.11.161 – 10.37.11.17410.37.11.175
6010.37.11.176/2810.37.11.177 – 10.37.11.19010.37.11.191
6110.37.11.192/2810.37.11.193 – 10.37.11.20610.37.11.207
6210.37.11.208/2810.37.11.209 – 10.37.11.22210.37.11.223
6310.37.11.224/2810.37.11.225 – 10.37.11.23810.37.11.239
6410.37.11.240/2810.37.11.241 – 10.37.11.25410.37.11.255
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 →