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)10.64.64.0/22
network10.64.64.0/22
broadcast10.64.67.255
first host10.64.64.1
last host10.64.67.254
subnet mask255.255.252.0
wildcard0.0.3.255
addresses1,024
usable hosts1,022
classA
ipcalc 10.64.64.0/22
address00001010.01000000.01000000.00000000
subnet mask11111111.11111111.11111100.00000000
network00001010.01000000.01000000.00000000
broadcast00001010.01000000.01000011.11111111
green = network part, grey = host part
hex0x0a404000
decimal171982848
reverse dns0.64.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:4000

/22 split into /29 · 128 subnets

close ×
#networkhost rangebroadcast
110.64.64.0/2910.64.64.1 – 10.64.64.610.64.64.7
210.64.64.8/2910.64.64.9 – 10.64.64.1410.64.64.15
310.64.64.16/2910.64.64.17 – 10.64.64.2210.64.64.23
410.64.64.24/2910.64.64.25 – 10.64.64.3010.64.64.31
510.64.64.32/2910.64.64.33 – 10.64.64.3810.64.64.39
610.64.64.40/2910.64.64.41 – 10.64.64.4610.64.64.47
710.64.64.48/2910.64.64.49 – 10.64.64.5410.64.64.55
810.64.64.56/2910.64.64.57 – 10.64.64.6210.64.64.63
910.64.64.64/2910.64.64.65 – 10.64.64.7010.64.64.71
1010.64.64.72/2910.64.64.73 – 10.64.64.7810.64.64.79
1110.64.64.80/2910.64.64.81 – 10.64.64.8610.64.64.87
1210.64.64.88/2910.64.64.89 – 10.64.64.9410.64.64.95
1310.64.64.96/2910.64.64.97 – 10.64.64.10210.64.64.103
1410.64.64.104/2910.64.64.105 – 10.64.64.11010.64.64.111
1510.64.64.112/2910.64.64.113 – 10.64.64.11810.64.64.119
1610.64.64.120/2910.64.64.121 – 10.64.64.12610.64.64.127
1710.64.64.128/2910.64.64.129 – 10.64.64.13410.64.64.135
1810.64.64.136/2910.64.64.137 – 10.64.64.14210.64.64.143
1910.64.64.144/2910.64.64.145 – 10.64.64.15010.64.64.151
2010.64.64.152/2910.64.64.153 – 10.64.64.15810.64.64.159
2110.64.64.160/2910.64.64.161 – 10.64.64.16610.64.64.167
2210.64.64.168/2910.64.64.169 – 10.64.64.17410.64.64.175
2310.64.64.176/2910.64.64.177 – 10.64.64.18210.64.64.183
2410.64.64.184/2910.64.64.185 – 10.64.64.19010.64.64.191
2510.64.64.192/2910.64.64.193 – 10.64.64.19810.64.64.199
2610.64.64.200/2910.64.64.201 – 10.64.64.20610.64.64.207
2710.64.64.208/2910.64.64.209 – 10.64.64.21410.64.64.215
2810.64.64.216/2910.64.64.217 – 10.64.64.22210.64.64.223
2910.64.64.224/2910.64.64.225 – 10.64.64.23010.64.64.231
3010.64.64.232/2910.64.64.233 – 10.64.64.23810.64.64.239
3110.64.64.240/2910.64.64.241 – 10.64.64.24610.64.64.247
3210.64.64.248/2910.64.64.249 – 10.64.64.25410.64.64.255
3310.64.65.0/2910.64.65.1 – 10.64.65.610.64.65.7
3410.64.65.8/2910.64.65.9 – 10.64.65.1410.64.65.15
3510.64.65.16/2910.64.65.17 – 10.64.65.2210.64.65.23
3610.64.65.24/2910.64.65.25 – 10.64.65.3010.64.65.31
3710.64.65.32/2910.64.65.33 – 10.64.65.3810.64.65.39
3810.64.65.40/2910.64.65.41 – 10.64.65.4610.64.65.47
3910.64.65.48/2910.64.65.49 – 10.64.65.5410.64.65.55
4010.64.65.56/2910.64.65.57 – 10.64.65.6210.64.65.63
4110.64.65.64/2910.64.65.65 – 10.64.65.7010.64.65.71
4210.64.65.72/2910.64.65.73 – 10.64.65.7810.64.65.79
4310.64.65.80/2910.64.65.81 – 10.64.65.8610.64.65.87
4410.64.65.88/2910.64.65.89 – 10.64.65.9410.64.65.95
4510.64.65.96/2910.64.65.97 – 10.64.65.10210.64.65.103
4610.64.65.104/2910.64.65.105 – 10.64.65.11010.64.65.111
4710.64.65.112/2910.64.65.113 – 10.64.65.11810.64.65.119
4810.64.65.120/2910.64.65.121 – 10.64.65.12610.64.65.127
4910.64.65.128/2910.64.65.129 – 10.64.65.13410.64.65.135
5010.64.65.136/2910.64.65.137 – 10.64.65.14210.64.65.143
5110.64.65.144/2910.64.65.145 – 10.64.65.15010.64.65.151
5210.64.65.152/2910.64.65.153 – 10.64.65.15810.64.65.159
5310.64.65.160/2910.64.65.161 – 10.64.65.16610.64.65.167
5410.64.65.168/2910.64.65.169 – 10.64.65.17410.64.65.175
5510.64.65.176/2910.64.65.177 – 10.64.65.18210.64.65.183
5610.64.65.184/2910.64.65.185 – 10.64.65.19010.64.65.191
5710.64.65.192/2910.64.65.193 – 10.64.65.19810.64.65.199
5810.64.65.200/2910.64.65.201 – 10.64.65.20610.64.65.207
5910.64.65.208/2910.64.65.209 – 10.64.65.21410.64.65.215
6010.64.65.216/2910.64.65.217 – 10.64.65.22210.64.65.223
6110.64.65.224/2910.64.65.225 – 10.64.65.23010.64.65.231
6210.64.65.232/2910.64.65.233 – 10.64.65.23810.64.65.239
6310.64.65.240/2910.64.65.241 – 10.64.65.24610.64.65.247
6410.64.65.248/2910.64.65.249 – 10.64.65.25410.64.65.255
6510.64.66.0/2910.64.66.1 – 10.64.66.610.64.66.7
6610.64.66.8/2910.64.66.9 – 10.64.66.1410.64.66.15
6710.64.66.16/2910.64.66.17 – 10.64.66.2210.64.66.23
6810.64.66.24/2910.64.66.25 – 10.64.66.3010.64.66.31
6910.64.66.32/2910.64.66.33 – 10.64.66.3810.64.66.39
7010.64.66.40/2910.64.66.41 – 10.64.66.4610.64.66.47
7110.64.66.48/2910.64.66.49 – 10.64.66.5410.64.66.55
7210.64.66.56/2910.64.66.57 – 10.64.66.6210.64.66.63
7310.64.66.64/2910.64.66.65 – 10.64.66.7010.64.66.71
7410.64.66.72/2910.64.66.73 – 10.64.66.7810.64.66.79
7510.64.66.80/2910.64.66.81 – 10.64.66.8610.64.66.87
7610.64.66.88/2910.64.66.89 – 10.64.66.9410.64.66.95
7710.64.66.96/2910.64.66.97 – 10.64.66.10210.64.66.103
7810.64.66.104/2910.64.66.105 – 10.64.66.11010.64.66.111
7910.64.66.112/2910.64.66.113 – 10.64.66.11810.64.66.119
8010.64.66.120/2910.64.66.121 – 10.64.66.12610.64.66.127
8110.64.66.128/2910.64.66.129 – 10.64.66.13410.64.66.135
8210.64.66.136/2910.64.66.137 – 10.64.66.14210.64.66.143
8310.64.66.144/2910.64.66.145 – 10.64.66.15010.64.66.151
8410.64.66.152/2910.64.66.153 – 10.64.66.15810.64.66.159
8510.64.66.160/2910.64.66.161 – 10.64.66.16610.64.66.167
8610.64.66.168/2910.64.66.169 – 10.64.66.17410.64.66.175
8710.64.66.176/2910.64.66.177 – 10.64.66.18210.64.66.183
8810.64.66.184/2910.64.66.185 – 10.64.66.19010.64.66.191
8910.64.66.192/2910.64.66.193 – 10.64.66.19810.64.66.199
9010.64.66.200/2910.64.66.201 – 10.64.66.20610.64.66.207
9110.64.66.208/2910.64.66.209 – 10.64.66.21410.64.66.215
9210.64.66.216/2910.64.66.217 – 10.64.66.22210.64.66.223
9310.64.66.224/2910.64.66.225 – 10.64.66.23010.64.66.231
9410.64.66.232/2910.64.66.233 – 10.64.66.23810.64.66.239
9510.64.66.240/2910.64.66.241 – 10.64.66.24610.64.66.247
9610.64.66.248/2910.64.66.249 – 10.64.66.25410.64.66.255
9710.64.67.0/2910.64.67.1 – 10.64.67.610.64.67.7
9810.64.67.8/2910.64.67.9 – 10.64.67.1410.64.67.15
9910.64.67.16/2910.64.67.17 – 10.64.67.2210.64.67.23
10010.64.67.24/2910.64.67.25 – 10.64.67.3010.64.67.31
10110.64.67.32/2910.64.67.33 – 10.64.67.3810.64.67.39
10210.64.67.40/2910.64.67.41 – 10.64.67.4610.64.67.47
10310.64.67.48/2910.64.67.49 – 10.64.67.5410.64.67.55
10410.64.67.56/2910.64.67.57 – 10.64.67.6210.64.67.63
10510.64.67.64/2910.64.67.65 – 10.64.67.7010.64.67.71
10610.64.67.72/2910.64.67.73 – 10.64.67.7810.64.67.79
10710.64.67.80/2910.64.67.81 – 10.64.67.8610.64.67.87
10810.64.67.88/2910.64.67.89 – 10.64.67.9410.64.67.95
10910.64.67.96/2910.64.67.97 – 10.64.67.10210.64.67.103
11010.64.67.104/2910.64.67.105 – 10.64.67.11010.64.67.111
11110.64.67.112/2910.64.67.113 – 10.64.67.11810.64.67.119
11210.64.67.120/2910.64.67.121 – 10.64.67.12610.64.67.127
11310.64.67.128/2910.64.67.129 – 10.64.67.13410.64.67.135
11410.64.67.136/2910.64.67.137 – 10.64.67.14210.64.67.143
11510.64.67.144/2910.64.67.145 – 10.64.67.15010.64.67.151
11610.64.67.152/2910.64.67.153 – 10.64.67.15810.64.67.159
11710.64.67.160/2910.64.67.161 – 10.64.67.16610.64.67.167
11810.64.67.168/2910.64.67.169 – 10.64.67.17410.64.67.175
11910.64.67.176/2910.64.67.177 – 10.64.67.18210.64.67.183
12010.64.67.184/2910.64.67.185 – 10.64.67.19010.64.67.191
12110.64.67.192/2910.64.67.193 – 10.64.67.19810.64.67.199
12210.64.67.200/2910.64.67.201 – 10.64.67.20610.64.67.207
12310.64.67.208/2910.64.67.209 – 10.64.67.21410.64.67.215
12410.64.67.216/2910.64.67.217 – 10.64.67.22210.64.67.223
12510.64.67.224/2910.64.67.225 – 10.64.67.23010.64.67.231
12610.64.67.232/2910.64.67.233 – 10.64.67.23810.64.67.239
12710.64.67.240/2910.64.67.241 – 10.64.67.24610.64.67.247
12810.64.67.248/2910.64.67.249 – 10.64.67.25410.64.67.255
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 →