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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)10.37.152.0/22
network10.37.152.0/22
broadcast10.37.155.255
first host10.37.152.1
last host10.37.155.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.37.152.0/22
address00001010.00100101.10011000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.00100101.10011000.00000000
broadcast00001010.00100101.10011011.11111111
green = network part, grey = host part
hex0x0a259800
decimal170235904
reverse dns0.152.37.10.in-addr.arpa
ipv4-mapped::ffff:a25:9800

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.37.152.0/2810.37.152.1 – 10.37.152.1410.37.152.15
210.37.152.16/2810.37.152.17 – 10.37.152.3010.37.152.31
310.37.152.32/2810.37.152.33 – 10.37.152.4610.37.152.47
410.37.152.48/2810.37.152.49 – 10.37.152.6210.37.152.63
510.37.152.64/2810.37.152.65 – 10.37.152.7810.37.152.79
610.37.152.80/2810.37.152.81 – 10.37.152.9410.37.152.95
710.37.152.96/2810.37.152.97 – 10.37.152.11010.37.152.111
810.37.152.112/2810.37.152.113 – 10.37.152.12610.37.152.127
910.37.152.128/2810.37.152.129 – 10.37.152.14210.37.152.143
1010.37.152.144/2810.37.152.145 – 10.37.152.15810.37.152.159
1110.37.152.160/2810.37.152.161 – 10.37.152.17410.37.152.175
1210.37.152.176/2810.37.152.177 – 10.37.152.19010.37.152.191
1310.37.152.192/2810.37.152.193 – 10.37.152.20610.37.152.207
1410.37.152.208/2810.37.152.209 – 10.37.152.22210.37.152.223
1510.37.152.224/2810.37.152.225 – 10.37.152.23810.37.152.239
1610.37.152.240/2810.37.152.241 – 10.37.152.25410.37.152.255
1710.37.153.0/2810.37.153.1 – 10.37.153.1410.37.153.15
1810.37.153.16/2810.37.153.17 – 10.37.153.3010.37.153.31
1910.37.153.32/2810.37.153.33 – 10.37.153.4610.37.153.47
2010.37.153.48/2810.37.153.49 – 10.37.153.6210.37.153.63
2110.37.153.64/2810.37.153.65 – 10.37.153.7810.37.153.79
2210.37.153.80/2810.37.153.81 – 10.37.153.9410.37.153.95
2310.37.153.96/2810.37.153.97 – 10.37.153.11010.37.153.111
2410.37.153.112/2810.37.153.113 – 10.37.153.12610.37.153.127
2510.37.153.128/2810.37.153.129 – 10.37.153.14210.37.153.143
2610.37.153.144/2810.37.153.145 – 10.37.153.15810.37.153.159
2710.37.153.160/2810.37.153.161 – 10.37.153.17410.37.153.175
2810.37.153.176/2810.37.153.177 – 10.37.153.19010.37.153.191
2910.37.153.192/2810.37.153.193 – 10.37.153.20610.37.153.207
3010.37.153.208/2810.37.153.209 – 10.37.153.22210.37.153.223
3110.37.153.224/2810.37.153.225 – 10.37.153.23810.37.153.239
3210.37.153.240/2810.37.153.241 – 10.37.153.25410.37.153.255
3310.37.154.0/2810.37.154.1 – 10.37.154.1410.37.154.15
3410.37.154.16/2810.37.154.17 – 10.37.154.3010.37.154.31
3510.37.154.32/2810.37.154.33 – 10.37.154.4610.37.154.47
3610.37.154.48/2810.37.154.49 – 10.37.154.6210.37.154.63
3710.37.154.64/2810.37.154.65 – 10.37.154.7810.37.154.79
3810.37.154.80/2810.37.154.81 – 10.37.154.9410.37.154.95
3910.37.154.96/2810.37.154.97 – 10.37.154.11010.37.154.111
4010.37.154.112/2810.37.154.113 – 10.37.154.12610.37.154.127
4110.37.154.128/2810.37.154.129 – 10.37.154.14210.37.154.143
4210.37.154.144/2810.37.154.145 – 10.37.154.15810.37.154.159
4310.37.154.160/2810.37.154.161 – 10.37.154.17410.37.154.175
4410.37.154.176/2810.37.154.177 – 10.37.154.19010.37.154.191
4510.37.154.192/2810.37.154.193 – 10.37.154.20610.37.154.207
4610.37.154.208/2810.37.154.209 – 10.37.154.22210.37.154.223
4710.37.154.224/2810.37.154.225 – 10.37.154.23810.37.154.239
4810.37.154.240/2810.37.154.241 – 10.37.154.25410.37.154.255
4910.37.155.0/2810.37.155.1 – 10.37.155.1410.37.155.15
5010.37.155.16/2810.37.155.17 – 10.37.155.3010.37.155.31
5110.37.155.32/2810.37.155.33 – 10.37.155.4610.37.155.47
5210.37.155.48/2810.37.155.49 – 10.37.155.6210.37.155.63
5310.37.155.64/2810.37.155.65 – 10.37.155.7810.37.155.79
5410.37.155.80/2810.37.155.81 – 10.37.155.9410.37.155.95
5510.37.155.96/2810.37.155.97 – 10.37.155.11010.37.155.111
5610.37.155.112/2810.37.155.113 – 10.37.155.12610.37.155.127
5710.37.155.128/2810.37.155.129 – 10.37.155.14210.37.155.143
5810.37.155.144/2810.37.155.145 – 10.37.155.15810.37.155.159
5910.37.155.160/2810.37.155.161 – 10.37.155.17410.37.155.175
6010.37.155.176/2810.37.155.177 – 10.37.155.19010.37.155.191
6110.37.155.192/2810.37.155.193 – 10.37.155.20610.37.155.207
6210.37.155.208/2810.37.155.209 – 10.37.155.22210.37.155.223
6310.37.155.224/2810.37.155.225 – 10.37.155.23810.37.155.239
6410.37.155.240/2810.37.155.241 – 10.37.155.25410.37.155.255
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 →