ip
ipku.in

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)10.71.40.0/22
network10.71.40.0/22
broadcast10.71.43.255
first host10.71.40.1
last host10.71.43.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.71.40.0/22
address00001010.01000111.00101000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01000111.00101000.00000000
broadcast00001010.01000111.00101011.11111111
green = network part, grey = host part
hex0x0a472800
decimal172435456
reverse dns0.40.71.10.in-addr.arpa
ipv4-mapped::ffff:a47:2800

/22 split into /29 · 128 subnets

close ×
#networkhost rangebroadcast
110.71.40.0/2910.71.40.1 – 10.71.40.610.71.40.7
210.71.40.8/2910.71.40.9 – 10.71.40.1410.71.40.15
310.71.40.16/2910.71.40.17 – 10.71.40.2210.71.40.23
410.71.40.24/2910.71.40.25 – 10.71.40.3010.71.40.31
510.71.40.32/2910.71.40.33 – 10.71.40.3810.71.40.39
610.71.40.40/2910.71.40.41 – 10.71.40.4610.71.40.47
710.71.40.48/2910.71.40.49 – 10.71.40.5410.71.40.55
810.71.40.56/2910.71.40.57 – 10.71.40.6210.71.40.63
910.71.40.64/2910.71.40.65 – 10.71.40.7010.71.40.71
1010.71.40.72/2910.71.40.73 – 10.71.40.7810.71.40.79
1110.71.40.80/2910.71.40.81 – 10.71.40.8610.71.40.87
1210.71.40.88/2910.71.40.89 – 10.71.40.9410.71.40.95
1310.71.40.96/2910.71.40.97 – 10.71.40.10210.71.40.103
1410.71.40.104/2910.71.40.105 – 10.71.40.11010.71.40.111
1510.71.40.112/2910.71.40.113 – 10.71.40.11810.71.40.119
1610.71.40.120/2910.71.40.121 – 10.71.40.12610.71.40.127
1710.71.40.128/2910.71.40.129 – 10.71.40.13410.71.40.135
1810.71.40.136/2910.71.40.137 – 10.71.40.14210.71.40.143
1910.71.40.144/2910.71.40.145 – 10.71.40.15010.71.40.151
2010.71.40.152/2910.71.40.153 – 10.71.40.15810.71.40.159
2110.71.40.160/2910.71.40.161 – 10.71.40.16610.71.40.167
2210.71.40.168/2910.71.40.169 – 10.71.40.17410.71.40.175
2310.71.40.176/2910.71.40.177 – 10.71.40.18210.71.40.183
2410.71.40.184/2910.71.40.185 – 10.71.40.19010.71.40.191
2510.71.40.192/2910.71.40.193 – 10.71.40.19810.71.40.199
2610.71.40.200/2910.71.40.201 – 10.71.40.20610.71.40.207
2710.71.40.208/2910.71.40.209 – 10.71.40.21410.71.40.215
2810.71.40.216/2910.71.40.217 – 10.71.40.22210.71.40.223
2910.71.40.224/2910.71.40.225 – 10.71.40.23010.71.40.231
3010.71.40.232/2910.71.40.233 – 10.71.40.23810.71.40.239
3110.71.40.240/2910.71.40.241 – 10.71.40.24610.71.40.247
3210.71.40.248/2910.71.40.249 – 10.71.40.25410.71.40.255
3310.71.41.0/2910.71.41.1 – 10.71.41.610.71.41.7
3410.71.41.8/2910.71.41.9 – 10.71.41.1410.71.41.15
3510.71.41.16/2910.71.41.17 – 10.71.41.2210.71.41.23
3610.71.41.24/2910.71.41.25 – 10.71.41.3010.71.41.31
3710.71.41.32/2910.71.41.33 – 10.71.41.3810.71.41.39
3810.71.41.40/2910.71.41.41 – 10.71.41.4610.71.41.47
3910.71.41.48/2910.71.41.49 – 10.71.41.5410.71.41.55
4010.71.41.56/2910.71.41.57 – 10.71.41.6210.71.41.63
4110.71.41.64/2910.71.41.65 – 10.71.41.7010.71.41.71
4210.71.41.72/2910.71.41.73 – 10.71.41.7810.71.41.79
4310.71.41.80/2910.71.41.81 – 10.71.41.8610.71.41.87
4410.71.41.88/2910.71.41.89 – 10.71.41.9410.71.41.95
4510.71.41.96/2910.71.41.97 – 10.71.41.10210.71.41.103
4610.71.41.104/2910.71.41.105 – 10.71.41.11010.71.41.111
4710.71.41.112/2910.71.41.113 – 10.71.41.11810.71.41.119
4810.71.41.120/2910.71.41.121 – 10.71.41.12610.71.41.127
4910.71.41.128/2910.71.41.129 – 10.71.41.13410.71.41.135
5010.71.41.136/2910.71.41.137 – 10.71.41.14210.71.41.143
5110.71.41.144/2910.71.41.145 – 10.71.41.15010.71.41.151
5210.71.41.152/2910.71.41.153 – 10.71.41.15810.71.41.159
5310.71.41.160/2910.71.41.161 – 10.71.41.16610.71.41.167
5410.71.41.168/2910.71.41.169 – 10.71.41.17410.71.41.175
5510.71.41.176/2910.71.41.177 – 10.71.41.18210.71.41.183
5610.71.41.184/2910.71.41.185 – 10.71.41.19010.71.41.191
5710.71.41.192/2910.71.41.193 – 10.71.41.19810.71.41.199
5810.71.41.200/2910.71.41.201 – 10.71.41.20610.71.41.207
5910.71.41.208/2910.71.41.209 – 10.71.41.21410.71.41.215
6010.71.41.216/2910.71.41.217 – 10.71.41.22210.71.41.223
6110.71.41.224/2910.71.41.225 – 10.71.41.23010.71.41.231
6210.71.41.232/2910.71.41.233 – 10.71.41.23810.71.41.239
6310.71.41.240/2910.71.41.241 – 10.71.41.24610.71.41.247
6410.71.41.248/2910.71.41.249 – 10.71.41.25410.71.41.255
6510.71.42.0/2910.71.42.1 – 10.71.42.610.71.42.7
6610.71.42.8/2910.71.42.9 – 10.71.42.1410.71.42.15
6710.71.42.16/2910.71.42.17 – 10.71.42.2210.71.42.23
6810.71.42.24/2910.71.42.25 – 10.71.42.3010.71.42.31
6910.71.42.32/2910.71.42.33 – 10.71.42.3810.71.42.39
7010.71.42.40/2910.71.42.41 – 10.71.42.4610.71.42.47
7110.71.42.48/2910.71.42.49 – 10.71.42.5410.71.42.55
7210.71.42.56/2910.71.42.57 – 10.71.42.6210.71.42.63
7310.71.42.64/2910.71.42.65 – 10.71.42.7010.71.42.71
7410.71.42.72/2910.71.42.73 – 10.71.42.7810.71.42.79
7510.71.42.80/2910.71.42.81 – 10.71.42.8610.71.42.87
7610.71.42.88/2910.71.42.89 – 10.71.42.9410.71.42.95
7710.71.42.96/2910.71.42.97 – 10.71.42.10210.71.42.103
7810.71.42.104/2910.71.42.105 – 10.71.42.11010.71.42.111
7910.71.42.112/2910.71.42.113 – 10.71.42.11810.71.42.119
8010.71.42.120/2910.71.42.121 – 10.71.42.12610.71.42.127
8110.71.42.128/2910.71.42.129 – 10.71.42.13410.71.42.135
8210.71.42.136/2910.71.42.137 – 10.71.42.14210.71.42.143
8310.71.42.144/2910.71.42.145 – 10.71.42.15010.71.42.151
8410.71.42.152/2910.71.42.153 – 10.71.42.15810.71.42.159
8510.71.42.160/2910.71.42.161 – 10.71.42.16610.71.42.167
8610.71.42.168/2910.71.42.169 – 10.71.42.17410.71.42.175
8710.71.42.176/2910.71.42.177 – 10.71.42.18210.71.42.183
8810.71.42.184/2910.71.42.185 – 10.71.42.19010.71.42.191
8910.71.42.192/2910.71.42.193 – 10.71.42.19810.71.42.199
9010.71.42.200/2910.71.42.201 – 10.71.42.20610.71.42.207
9110.71.42.208/2910.71.42.209 – 10.71.42.21410.71.42.215
9210.71.42.216/2910.71.42.217 – 10.71.42.22210.71.42.223
9310.71.42.224/2910.71.42.225 – 10.71.42.23010.71.42.231
9410.71.42.232/2910.71.42.233 – 10.71.42.23810.71.42.239
9510.71.42.240/2910.71.42.241 – 10.71.42.24610.71.42.247
9610.71.42.248/2910.71.42.249 – 10.71.42.25410.71.42.255
9710.71.43.0/2910.71.43.1 – 10.71.43.610.71.43.7
9810.71.43.8/2910.71.43.9 – 10.71.43.1410.71.43.15
9910.71.43.16/2910.71.43.17 – 10.71.43.2210.71.43.23
10010.71.43.24/2910.71.43.25 – 10.71.43.3010.71.43.31
10110.71.43.32/2910.71.43.33 – 10.71.43.3810.71.43.39
10210.71.43.40/2910.71.43.41 – 10.71.43.4610.71.43.47
10310.71.43.48/2910.71.43.49 – 10.71.43.5410.71.43.55
10410.71.43.56/2910.71.43.57 – 10.71.43.6210.71.43.63
10510.71.43.64/2910.71.43.65 – 10.71.43.7010.71.43.71
10610.71.43.72/2910.71.43.73 – 10.71.43.7810.71.43.79
10710.71.43.80/2910.71.43.81 – 10.71.43.8610.71.43.87
10810.71.43.88/2910.71.43.89 – 10.71.43.9410.71.43.95
10910.71.43.96/2910.71.43.97 – 10.71.43.10210.71.43.103
11010.71.43.104/2910.71.43.105 – 10.71.43.11010.71.43.111
11110.71.43.112/2910.71.43.113 – 10.71.43.11810.71.43.119
11210.71.43.120/2910.71.43.121 – 10.71.43.12610.71.43.127
11310.71.43.128/2910.71.43.129 – 10.71.43.13410.71.43.135
11410.71.43.136/2910.71.43.137 – 10.71.43.14210.71.43.143
11510.71.43.144/2910.71.43.145 – 10.71.43.15010.71.43.151
11610.71.43.152/2910.71.43.153 – 10.71.43.15810.71.43.159
11710.71.43.160/2910.71.43.161 – 10.71.43.16610.71.43.167
11810.71.43.168/2910.71.43.169 – 10.71.43.17410.71.43.175
11910.71.43.176/2910.71.43.177 – 10.71.43.18210.71.43.183
12010.71.43.184/2910.71.43.185 – 10.71.43.19010.71.43.191
12110.71.43.192/2910.71.43.193 – 10.71.43.19810.71.43.199
12210.71.43.200/2910.71.43.201 – 10.71.43.20610.71.43.207
12310.71.43.208/2910.71.43.209 – 10.71.43.21410.71.43.215
12410.71.43.216/2910.71.43.217 – 10.71.43.22210.71.43.223
12510.71.43.224/2910.71.43.225 – 10.71.43.23010.71.43.231
12610.71.43.232/2910.71.43.233 – 10.71.43.23810.71.43.239
12710.71.43.240/2910.71.43.241 – 10.71.43.24610.71.43.247
12810.71.43.248/2910.71.43.249 – 10.71.43.25410.71.43.255
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 →