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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)10.145.44.0/22
network10.145.44.0/22
broadcast10.145.47.255
first host10.145.44.1
last host10.145.47.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.145.44.0/22
address00001010.10010001.00101100.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.10010001.00101100.00000000
broadcast00001010.10010001.00101111.11111111
green = network part, grey = host part
hex0x0a912c00
decimal177286144
reverse dns0.44.145.10.in-addr.arpa
ipv4-mapped::ffff:a91:2c00

/22 split into /28 · 64 subnets

close ×
#networkhost rangebroadcast
110.145.44.0/2810.145.44.1 – 10.145.44.1410.145.44.15
210.145.44.16/2810.145.44.17 – 10.145.44.3010.145.44.31
310.145.44.32/2810.145.44.33 – 10.145.44.4610.145.44.47
410.145.44.48/2810.145.44.49 – 10.145.44.6210.145.44.63
510.145.44.64/2810.145.44.65 – 10.145.44.7810.145.44.79
610.145.44.80/2810.145.44.81 – 10.145.44.9410.145.44.95
710.145.44.96/2810.145.44.97 – 10.145.44.11010.145.44.111
810.145.44.112/2810.145.44.113 – 10.145.44.12610.145.44.127
910.145.44.128/2810.145.44.129 – 10.145.44.14210.145.44.143
1010.145.44.144/2810.145.44.145 – 10.145.44.15810.145.44.159
1110.145.44.160/2810.145.44.161 – 10.145.44.17410.145.44.175
1210.145.44.176/2810.145.44.177 – 10.145.44.19010.145.44.191
1310.145.44.192/2810.145.44.193 – 10.145.44.20610.145.44.207
1410.145.44.208/2810.145.44.209 – 10.145.44.22210.145.44.223
1510.145.44.224/2810.145.44.225 – 10.145.44.23810.145.44.239
1610.145.44.240/2810.145.44.241 – 10.145.44.25410.145.44.255
1710.145.45.0/2810.145.45.1 – 10.145.45.1410.145.45.15
1810.145.45.16/2810.145.45.17 – 10.145.45.3010.145.45.31
1910.145.45.32/2810.145.45.33 – 10.145.45.4610.145.45.47
2010.145.45.48/2810.145.45.49 – 10.145.45.6210.145.45.63
2110.145.45.64/2810.145.45.65 – 10.145.45.7810.145.45.79
2210.145.45.80/2810.145.45.81 – 10.145.45.9410.145.45.95
2310.145.45.96/2810.145.45.97 – 10.145.45.11010.145.45.111
2410.145.45.112/2810.145.45.113 – 10.145.45.12610.145.45.127
2510.145.45.128/2810.145.45.129 – 10.145.45.14210.145.45.143
2610.145.45.144/2810.145.45.145 – 10.145.45.15810.145.45.159
2710.145.45.160/2810.145.45.161 – 10.145.45.17410.145.45.175
2810.145.45.176/2810.145.45.177 – 10.145.45.19010.145.45.191
2910.145.45.192/2810.145.45.193 – 10.145.45.20610.145.45.207
3010.145.45.208/2810.145.45.209 – 10.145.45.22210.145.45.223
3110.145.45.224/2810.145.45.225 – 10.145.45.23810.145.45.239
3210.145.45.240/2810.145.45.241 – 10.145.45.25410.145.45.255
3310.145.46.0/2810.145.46.1 – 10.145.46.1410.145.46.15
3410.145.46.16/2810.145.46.17 – 10.145.46.3010.145.46.31
3510.145.46.32/2810.145.46.33 – 10.145.46.4610.145.46.47
3610.145.46.48/2810.145.46.49 – 10.145.46.6210.145.46.63
3710.145.46.64/2810.145.46.65 – 10.145.46.7810.145.46.79
3810.145.46.80/2810.145.46.81 – 10.145.46.9410.145.46.95
3910.145.46.96/2810.145.46.97 – 10.145.46.11010.145.46.111
4010.145.46.112/2810.145.46.113 – 10.145.46.12610.145.46.127
4110.145.46.128/2810.145.46.129 – 10.145.46.14210.145.46.143
4210.145.46.144/2810.145.46.145 – 10.145.46.15810.145.46.159
4310.145.46.160/2810.145.46.161 – 10.145.46.17410.145.46.175
4410.145.46.176/2810.145.46.177 – 10.145.46.19010.145.46.191
4510.145.46.192/2810.145.46.193 – 10.145.46.20610.145.46.207
4610.145.46.208/2810.145.46.209 – 10.145.46.22210.145.46.223
4710.145.46.224/2810.145.46.225 – 10.145.46.23810.145.46.239
4810.145.46.240/2810.145.46.241 – 10.145.46.25410.145.46.255
4910.145.47.0/2810.145.47.1 – 10.145.47.1410.145.47.15
5010.145.47.16/2810.145.47.17 – 10.145.47.3010.145.47.31
5110.145.47.32/2810.145.47.33 – 10.145.47.4610.145.47.47
5210.145.47.48/2810.145.47.49 – 10.145.47.6210.145.47.63
5310.145.47.64/2810.145.47.65 – 10.145.47.7810.145.47.79
5410.145.47.80/2810.145.47.81 – 10.145.47.9410.145.47.95
5510.145.47.96/2810.145.47.97 – 10.145.47.11010.145.47.111
5610.145.47.112/2810.145.47.113 – 10.145.47.12610.145.47.127
5710.145.47.128/2810.145.47.129 – 10.145.47.14210.145.47.143
5810.145.47.144/2810.145.47.145 – 10.145.47.15810.145.47.159
5910.145.47.160/2810.145.47.161 – 10.145.47.17410.145.47.175
6010.145.47.176/2810.145.47.177 – 10.145.47.19010.145.47.191
6110.145.47.192/2810.145.47.193 – 10.145.47.20610.145.47.207
6210.145.47.208/2810.145.47.209 – 10.145.47.22210.145.47.223
6310.145.47.224/2810.145.47.225 – 10.145.47.23810.145.47.239
6410.145.47.240/2810.145.47.241 – 10.145.47.25410.145.47.255
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 →