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)10.87.40.0/22
network10.87.40.0/22
broadcast10.87.43.255
first host10.87.40.1
last host10.87.43.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.87.40.0/22
address00001010.01010111.00101000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01010111.00101000.00000000
broadcast00001010.01010111.00101011.11111111
green = network part, grey = host part
hex0x0a572800
decimal173484032
reverse dns0.40.87.10.in-addr.arpa
ipv4-mapped::ffff:a57:2800

/22 split into /29 · 128 subnets

close ×
#networkhost rangebroadcast
110.87.40.0/2910.87.40.1 – 10.87.40.610.87.40.7
210.87.40.8/2910.87.40.9 – 10.87.40.1410.87.40.15
310.87.40.16/2910.87.40.17 – 10.87.40.2210.87.40.23
410.87.40.24/2910.87.40.25 – 10.87.40.3010.87.40.31
510.87.40.32/2910.87.40.33 – 10.87.40.3810.87.40.39
610.87.40.40/2910.87.40.41 – 10.87.40.4610.87.40.47
710.87.40.48/2910.87.40.49 – 10.87.40.5410.87.40.55
810.87.40.56/2910.87.40.57 – 10.87.40.6210.87.40.63
910.87.40.64/2910.87.40.65 – 10.87.40.7010.87.40.71
1010.87.40.72/2910.87.40.73 – 10.87.40.7810.87.40.79
1110.87.40.80/2910.87.40.81 – 10.87.40.8610.87.40.87
1210.87.40.88/2910.87.40.89 – 10.87.40.9410.87.40.95
1310.87.40.96/2910.87.40.97 – 10.87.40.10210.87.40.103
1410.87.40.104/2910.87.40.105 – 10.87.40.11010.87.40.111
1510.87.40.112/2910.87.40.113 – 10.87.40.11810.87.40.119
1610.87.40.120/2910.87.40.121 – 10.87.40.12610.87.40.127
1710.87.40.128/2910.87.40.129 – 10.87.40.13410.87.40.135
1810.87.40.136/2910.87.40.137 – 10.87.40.14210.87.40.143
1910.87.40.144/2910.87.40.145 – 10.87.40.15010.87.40.151
2010.87.40.152/2910.87.40.153 – 10.87.40.15810.87.40.159
2110.87.40.160/2910.87.40.161 – 10.87.40.16610.87.40.167
2210.87.40.168/2910.87.40.169 – 10.87.40.17410.87.40.175
2310.87.40.176/2910.87.40.177 – 10.87.40.18210.87.40.183
2410.87.40.184/2910.87.40.185 – 10.87.40.19010.87.40.191
2510.87.40.192/2910.87.40.193 – 10.87.40.19810.87.40.199
2610.87.40.200/2910.87.40.201 – 10.87.40.20610.87.40.207
2710.87.40.208/2910.87.40.209 – 10.87.40.21410.87.40.215
2810.87.40.216/2910.87.40.217 – 10.87.40.22210.87.40.223
2910.87.40.224/2910.87.40.225 – 10.87.40.23010.87.40.231
3010.87.40.232/2910.87.40.233 – 10.87.40.23810.87.40.239
3110.87.40.240/2910.87.40.241 – 10.87.40.24610.87.40.247
3210.87.40.248/2910.87.40.249 – 10.87.40.25410.87.40.255
3310.87.41.0/2910.87.41.1 – 10.87.41.610.87.41.7
3410.87.41.8/2910.87.41.9 – 10.87.41.1410.87.41.15
3510.87.41.16/2910.87.41.17 – 10.87.41.2210.87.41.23
3610.87.41.24/2910.87.41.25 – 10.87.41.3010.87.41.31
3710.87.41.32/2910.87.41.33 – 10.87.41.3810.87.41.39
3810.87.41.40/2910.87.41.41 – 10.87.41.4610.87.41.47
3910.87.41.48/2910.87.41.49 – 10.87.41.5410.87.41.55
4010.87.41.56/2910.87.41.57 – 10.87.41.6210.87.41.63
4110.87.41.64/2910.87.41.65 – 10.87.41.7010.87.41.71
4210.87.41.72/2910.87.41.73 – 10.87.41.7810.87.41.79
4310.87.41.80/2910.87.41.81 – 10.87.41.8610.87.41.87
4410.87.41.88/2910.87.41.89 – 10.87.41.9410.87.41.95
4510.87.41.96/2910.87.41.97 – 10.87.41.10210.87.41.103
4610.87.41.104/2910.87.41.105 – 10.87.41.11010.87.41.111
4710.87.41.112/2910.87.41.113 – 10.87.41.11810.87.41.119
4810.87.41.120/2910.87.41.121 – 10.87.41.12610.87.41.127
4910.87.41.128/2910.87.41.129 – 10.87.41.13410.87.41.135
5010.87.41.136/2910.87.41.137 – 10.87.41.14210.87.41.143
5110.87.41.144/2910.87.41.145 – 10.87.41.15010.87.41.151
5210.87.41.152/2910.87.41.153 – 10.87.41.15810.87.41.159
5310.87.41.160/2910.87.41.161 – 10.87.41.16610.87.41.167
5410.87.41.168/2910.87.41.169 – 10.87.41.17410.87.41.175
5510.87.41.176/2910.87.41.177 – 10.87.41.18210.87.41.183
5610.87.41.184/2910.87.41.185 – 10.87.41.19010.87.41.191
5710.87.41.192/2910.87.41.193 – 10.87.41.19810.87.41.199
5810.87.41.200/2910.87.41.201 – 10.87.41.20610.87.41.207
5910.87.41.208/2910.87.41.209 – 10.87.41.21410.87.41.215
6010.87.41.216/2910.87.41.217 – 10.87.41.22210.87.41.223
6110.87.41.224/2910.87.41.225 – 10.87.41.23010.87.41.231
6210.87.41.232/2910.87.41.233 – 10.87.41.23810.87.41.239
6310.87.41.240/2910.87.41.241 – 10.87.41.24610.87.41.247
6410.87.41.248/2910.87.41.249 – 10.87.41.25410.87.41.255
6510.87.42.0/2910.87.42.1 – 10.87.42.610.87.42.7
6610.87.42.8/2910.87.42.9 – 10.87.42.1410.87.42.15
6710.87.42.16/2910.87.42.17 – 10.87.42.2210.87.42.23
6810.87.42.24/2910.87.42.25 – 10.87.42.3010.87.42.31
6910.87.42.32/2910.87.42.33 – 10.87.42.3810.87.42.39
7010.87.42.40/2910.87.42.41 – 10.87.42.4610.87.42.47
7110.87.42.48/2910.87.42.49 – 10.87.42.5410.87.42.55
7210.87.42.56/2910.87.42.57 – 10.87.42.6210.87.42.63
7310.87.42.64/2910.87.42.65 – 10.87.42.7010.87.42.71
7410.87.42.72/2910.87.42.73 – 10.87.42.7810.87.42.79
7510.87.42.80/2910.87.42.81 – 10.87.42.8610.87.42.87
7610.87.42.88/2910.87.42.89 – 10.87.42.9410.87.42.95
7710.87.42.96/2910.87.42.97 – 10.87.42.10210.87.42.103
7810.87.42.104/2910.87.42.105 – 10.87.42.11010.87.42.111
7910.87.42.112/2910.87.42.113 – 10.87.42.11810.87.42.119
8010.87.42.120/2910.87.42.121 – 10.87.42.12610.87.42.127
8110.87.42.128/2910.87.42.129 – 10.87.42.13410.87.42.135
8210.87.42.136/2910.87.42.137 – 10.87.42.14210.87.42.143
8310.87.42.144/2910.87.42.145 – 10.87.42.15010.87.42.151
8410.87.42.152/2910.87.42.153 – 10.87.42.15810.87.42.159
8510.87.42.160/2910.87.42.161 – 10.87.42.16610.87.42.167
8610.87.42.168/2910.87.42.169 – 10.87.42.17410.87.42.175
8710.87.42.176/2910.87.42.177 – 10.87.42.18210.87.42.183
8810.87.42.184/2910.87.42.185 – 10.87.42.19010.87.42.191
8910.87.42.192/2910.87.42.193 – 10.87.42.19810.87.42.199
9010.87.42.200/2910.87.42.201 – 10.87.42.20610.87.42.207
9110.87.42.208/2910.87.42.209 – 10.87.42.21410.87.42.215
9210.87.42.216/2910.87.42.217 – 10.87.42.22210.87.42.223
9310.87.42.224/2910.87.42.225 – 10.87.42.23010.87.42.231
9410.87.42.232/2910.87.42.233 – 10.87.42.23810.87.42.239
9510.87.42.240/2910.87.42.241 – 10.87.42.24610.87.42.247
9610.87.42.248/2910.87.42.249 – 10.87.42.25410.87.42.255
9710.87.43.0/2910.87.43.1 – 10.87.43.610.87.43.7
9810.87.43.8/2910.87.43.9 – 10.87.43.1410.87.43.15
9910.87.43.16/2910.87.43.17 – 10.87.43.2210.87.43.23
10010.87.43.24/2910.87.43.25 – 10.87.43.3010.87.43.31
10110.87.43.32/2910.87.43.33 – 10.87.43.3810.87.43.39
10210.87.43.40/2910.87.43.41 – 10.87.43.4610.87.43.47
10310.87.43.48/2910.87.43.49 – 10.87.43.5410.87.43.55
10410.87.43.56/2910.87.43.57 – 10.87.43.6210.87.43.63
10510.87.43.64/2910.87.43.65 – 10.87.43.7010.87.43.71
10610.87.43.72/2910.87.43.73 – 10.87.43.7810.87.43.79
10710.87.43.80/2910.87.43.81 – 10.87.43.8610.87.43.87
10810.87.43.88/2910.87.43.89 – 10.87.43.9410.87.43.95
10910.87.43.96/2910.87.43.97 – 10.87.43.10210.87.43.103
11010.87.43.104/2910.87.43.105 – 10.87.43.11010.87.43.111
11110.87.43.112/2910.87.43.113 – 10.87.43.11810.87.43.119
11210.87.43.120/2910.87.43.121 – 10.87.43.12610.87.43.127
11310.87.43.128/2910.87.43.129 – 10.87.43.13410.87.43.135
11410.87.43.136/2910.87.43.137 – 10.87.43.14210.87.43.143
11510.87.43.144/2910.87.43.145 – 10.87.43.15010.87.43.151
11610.87.43.152/2910.87.43.153 – 10.87.43.15810.87.43.159
11710.87.43.160/2910.87.43.161 – 10.87.43.16610.87.43.167
11810.87.43.168/2910.87.43.169 – 10.87.43.17410.87.43.175
11910.87.43.176/2910.87.43.177 – 10.87.43.18210.87.43.183
12010.87.43.184/2910.87.43.185 – 10.87.43.19010.87.43.191
12110.87.43.192/2910.87.43.193 – 10.87.43.19810.87.43.199
12210.87.43.200/2910.87.43.201 – 10.87.43.20610.87.43.207
12310.87.43.208/2910.87.43.209 – 10.87.43.21410.87.43.215
12410.87.43.216/2910.87.43.217 – 10.87.43.22210.87.43.223
12510.87.43.224/2910.87.43.225 – 10.87.43.23010.87.43.231
12610.87.43.232/2910.87.43.233 – 10.87.43.23810.87.43.239
12710.87.43.240/2910.87.43.241 – 10.87.43.24610.87.43.247
12810.87.43.248/2910.87.43.249 – 10.87.43.25410.87.43.255
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 →