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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)10.30.4.0/22
network10.30.4.0/22
broadcast10.30.7.255
first host10.30.4.1
last host10.30.7.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.30.4.0/22
address00001010.00011110.00000100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00011110.00000100.00000000
broadcast00001010.00011110.00000111.11111111
green = network part, grey = host part
hex0x0a1e0400
decimal169739264
reverse dns0.4.30.10.in-addr.arpa
ipv4-mapped::ffff:a1e:400

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.30.4.0/2810.30.4.1 – 10.30.4.1410.30.4.15
210.30.4.16/2810.30.4.17 – 10.30.4.3010.30.4.31
310.30.4.32/2810.30.4.33 – 10.30.4.4610.30.4.47
410.30.4.48/2810.30.4.49 – 10.30.4.6210.30.4.63
510.30.4.64/2810.30.4.65 – 10.30.4.7810.30.4.79
610.30.4.80/2810.30.4.81 – 10.30.4.9410.30.4.95
710.30.4.96/2810.30.4.97 – 10.30.4.11010.30.4.111
810.30.4.112/2810.30.4.113 – 10.30.4.12610.30.4.127
910.30.4.128/2810.30.4.129 – 10.30.4.14210.30.4.143
1010.30.4.144/2810.30.4.145 – 10.30.4.15810.30.4.159
1110.30.4.160/2810.30.4.161 – 10.30.4.17410.30.4.175
1210.30.4.176/2810.30.4.177 – 10.30.4.19010.30.4.191
1310.30.4.192/2810.30.4.193 – 10.30.4.20610.30.4.207
1410.30.4.208/2810.30.4.209 – 10.30.4.22210.30.4.223
1510.30.4.224/2810.30.4.225 – 10.30.4.23810.30.4.239
1610.30.4.240/2810.30.4.241 – 10.30.4.25410.30.4.255
1710.30.5.0/2810.30.5.1 – 10.30.5.1410.30.5.15
1810.30.5.16/2810.30.5.17 – 10.30.5.3010.30.5.31
1910.30.5.32/2810.30.5.33 – 10.30.5.4610.30.5.47
2010.30.5.48/2810.30.5.49 – 10.30.5.6210.30.5.63
2110.30.5.64/2810.30.5.65 – 10.30.5.7810.30.5.79
2210.30.5.80/2810.30.5.81 – 10.30.5.9410.30.5.95
2310.30.5.96/2810.30.5.97 – 10.30.5.11010.30.5.111
2410.30.5.112/2810.30.5.113 – 10.30.5.12610.30.5.127
2510.30.5.128/2810.30.5.129 – 10.30.5.14210.30.5.143
2610.30.5.144/2810.30.5.145 – 10.30.5.15810.30.5.159
2710.30.5.160/2810.30.5.161 – 10.30.5.17410.30.5.175
2810.30.5.176/2810.30.5.177 – 10.30.5.19010.30.5.191
2910.30.5.192/2810.30.5.193 – 10.30.5.20610.30.5.207
3010.30.5.208/2810.30.5.209 – 10.30.5.22210.30.5.223
3110.30.5.224/2810.30.5.225 – 10.30.5.23810.30.5.239
3210.30.5.240/2810.30.5.241 – 10.30.5.25410.30.5.255
3310.30.6.0/2810.30.6.1 – 10.30.6.1410.30.6.15
3410.30.6.16/2810.30.6.17 – 10.30.6.3010.30.6.31
3510.30.6.32/2810.30.6.33 – 10.30.6.4610.30.6.47
3610.30.6.48/2810.30.6.49 – 10.30.6.6210.30.6.63
3710.30.6.64/2810.30.6.65 – 10.30.6.7810.30.6.79
3810.30.6.80/2810.30.6.81 – 10.30.6.9410.30.6.95
3910.30.6.96/2810.30.6.97 – 10.30.6.11010.30.6.111
4010.30.6.112/2810.30.6.113 – 10.30.6.12610.30.6.127
4110.30.6.128/2810.30.6.129 – 10.30.6.14210.30.6.143
4210.30.6.144/2810.30.6.145 – 10.30.6.15810.30.6.159
4310.30.6.160/2810.30.6.161 – 10.30.6.17410.30.6.175
4410.30.6.176/2810.30.6.177 – 10.30.6.19010.30.6.191
4510.30.6.192/2810.30.6.193 – 10.30.6.20610.30.6.207
4610.30.6.208/2810.30.6.209 – 10.30.6.22210.30.6.223
4710.30.6.224/2810.30.6.225 – 10.30.6.23810.30.6.239
4810.30.6.240/2810.30.6.241 – 10.30.6.25410.30.6.255
4910.30.7.0/2810.30.7.1 – 10.30.7.1410.30.7.15
5010.30.7.16/2810.30.7.17 – 10.30.7.3010.30.7.31
5110.30.7.32/2810.30.7.33 – 10.30.7.4610.30.7.47
5210.30.7.48/2810.30.7.49 – 10.30.7.6210.30.7.63
5310.30.7.64/2810.30.7.65 – 10.30.7.7810.30.7.79
5410.30.7.80/2810.30.7.81 – 10.30.7.9410.30.7.95
5510.30.7.96/2810.30.7.97 – 10.30.7.11010.30.7.111
5610.30.7.112/2810.30.7.113 – 10.30.7.12610.30.7.127
5710.30.7.128/2810.30.7.129 – 10.30.7.14210.30.7.143
5810.30.7.144/2810.30.7.145 – 10.30.7.15810.30.7.159
5910.30.7.160/2810.30.7.161 – 10.30.7.17410.30.7.175
6010.30.7.176/2810.30.7.177 – 10.30.7.19010.30.7.191
6110.30.7.192/2810.30.7.193 – 10.30.7.20610.30.7.207
6210.30.7.208/2810.30.7.209 – 10.30.7.22210.30.7.223
6310.30.7.224/2810.30.7.225 – 10.30.7.23810.30.7.239
6410.30.7.240/2810.30.7.241 – 10.30.7.25410.30.7.255
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 →