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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)10.23.136.0/22
network10.23.136.0/22
broadcast10.23.139.255
first host10.23.136.1
last host10.23.139.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.23.136.0/22
address00001010.00010111.10001000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00010111.10001000.00000000
broadcast00001010.00010111.10001011.11111111
green = network part, grey = host part
hex0x0a178800
decimal169314304
reverse dns0.136.23.10.in-addr.arpa
ipv4-mapped::ffff:a17:8800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.23.136.0/2810.23.136.1 – 10.23.136.1410.23.136.15
210.23.136.16/2810.23.136.17 – 10.23.136.3010.23.136.31
310.23.136.32/2810.23.136.33 – 10.23.136.4610.23.136.47
410.23.136.48/2810.23.136.49 – 10.23.136.6210.23.136.63
510.23.136.64/2810.23.136.65 – 10.23.136.7810.23.136.79
610.23.136.80/2810.23.136.81 – 10.23.136.9410.23.136.95
710.23.136.96/2810.23.136.97 – 10.23.136.11010.23.136.111
810.23.136.112/2810.23.136.113 – 10.23.136.12610.23.136.127
910.23.136.128/2810.23.136.129 – 10.23.136.14210.23.136.143
1010.23.136.144/2810.23.136.145 – 10.23.136.15810.23.136.159
1110.23.136.160/2810.23.136.161 – 10.23.136.17410.23.136.175
1210.23.136.176/2810.23.136.177 – 10.23.136.19010.23.136.191
1310.23.136.192/2810.23.136.193 – 10.23.136.20610.23.136.207
1410.23.136.208/2810.23.136.209 – 10.23.136.22210.23.136.223
1510.23.136.224/2810.23.136.225 – 10.23.136.23810.23.136.239
1610.23.136.240/2810.23.136.241 – 10.23.136.25410.23.136.255
1710.23.137.0/2810.23.137.1 – 10.23.137.1410.23.137.15
1810.23.137.16/2810.23.137.17 – 10.23.137.3010.23.137.31
1910.23.137.32/2810.23.137.33 – 10.23.137.4610.23.137.47
2010.23.137.48/2810.23.137.49 – 10.23.137.6210.23.137.63
2110.23.137.64/2810.23.137.65 – 10.23.137.7810.23.137.79
2210.23.137.80/2810.23.137.81 – 10.23.137.9410.23.137.95
2310.23.137.96/2810.23.137.97 – 10.23.137.11010.23.137.111
2410.23.137.112/2810.23.137.113 – 10.23.137.12610.23.137.127
2510.23.137.128/2810.23.137.129 – 10.23.137.14210.23.137.143
2610.23.137.144/2810.23.137.145 – 10.23.137.15810.23.137.159
2710.23.137.160/2810.23.137.161 – 10.23.137.17410.23.137.175
2810.23.137.176/2810.23.137.177 – 10.23.137.19010.23.137.191
2910.23.137.192/2810.23.137.193 – 10.23.137.20610.23.137.207
3010.23.137.208/2810.23.137.209 – 10.23.137.22210.23.137.223
3110.23.137.224/2810.23.137.225 – 10.23.137.23810.23.137.239
3210.23.137.240/2810.23.137.241 – 10.23.137.25410.23.137.255
3310.23.138.0/2810.23.138.1 – 10.23.138.1410.23.138.15
3410.23.138.16/2810.23.138.17 – 10.23.138.3010.23.138.31
3510.23.138.32/2810.23.138.33 – 10.23.138.4610.23.138.47
3610.23.138.48/2810.23.138.49 – 10.23.138.6210.23.138.63
3710.23.138.64/2810.23.138.65 – 10.23.138.7810.23.138.79
3810.23.138.80/2810.23.138.81 – 10.23.138.9410.23.138.95
3910.23.138.96/2810.23.138.97 – 10.23.138.11010.23.138.111
4010.23.138.112/2810.23.138.113 – 10.23.138.12610.23.138.127
4110.23.138.128/2810.23.138.129 – 10.23.138.14210.23.138.143
4210.23.138.144/2810.23.138.145 – 10.23.138.15810.23.138.159
4310.23.138.160/2810.23.138.161 – 10.23.138.17410.23.138.175
4410.23.138.176/2810.23.138.177 – 10.23.138.19010.23.138.191
4510.23.138.192/2810.23.138.193 – 10.23.138.20610.23.138.207
4610.23.138.208/2810.23.138.209 – 10.23.138.22210.23.138.223
4710.23.138.224/2810.23.138.225 – 10.23.138.23810.23.138.239
4810.23.138.240/2810.23.138.241 – 10.23.138.25410.23.138.255
4910.23.139.0/2810.23.139.1 – 10.23.139.1410.23.139.15
5010.23.139.16/2810.23.139.17 – 10.23.139.3010.23.139.31
5110.23.139.32/2810.23.139.33 – 10.23.139.4610.23.139.47
5210.23.139.48/2810.23.139.49 – 10.23.139.6210.23.139.63
5310.23.139.64/2810.23.139.65 – 10.23.139.7810.23.139.79
5410.23.139.80/2810.23.139.81 – 10.23.139.9410.23.139.95
5510.23.139.96/2810.23.139.97 – 10.23.139.11010.23.139.111
5610.23.139.112/2810.23.139.113 – 10.23.139.12610.23.139.127
5710.23.139.128/2810.23.139.129 – 10.23.139.14210.23.139.143
5810.23.139.144/2810.23.139.145 – 10.23.139.15810.23.139.159
5910.23.139.160/2810.23.139.161 – 10.23.139.17410.23.139.175
6010.23.139.176/2810.23.139.177 – 10.23.139.19010.23.139.191
6110.23.139.192/2810.23.139.193 – 10.23.139.20610.23.139.207
6210.23.139.208/2810.23.139.209 – 10.23.139.22210.23.139.223
6310.23.139.224/2810.23.139.225 – 10.23.139.23810.23.139.239
6410.23.139.240/2810.23.139.241 – 10.23.139.25410.23.139.255
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 →