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)10.7.0.0/17
network10.7.0.0/17
broadcast10.7.127.255
first host10.7.0.1
last host10.7.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.7.0.0/17
address00001010.00000111.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.00000111.00000000.00000000
broadcast00001010.00000111.01111111.11111111
green = network part, grey = host part
hex0x0a070000
decimal168230912
reverse dns0.0.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:0

/17 split into /28 · 2,048 subnets

close ×
#networkhost rangebroadcast
110.7.0.0/2810.7.0.1 – 10.7.0.1410.7.0.15
210.7.0.16/2810.7.0.17 – 10.7.0.3010.7.0.31
310.7.0.32/2810.7.0.33 – 10.7.0.4610.7.0.47
410.7.0.48/2810.7.0.49 – 10.7.0.6210.7.0.63
510.7.0.64/2810.7.0.65 – 10.7.0.7810.7.0.79
610.7.0.80/2810.7.0.81 – 10.7.0.9410.7.0.95
710.7.0.96/2810.7.0.97 – 10.7.0.11010.7.0.111
810.7.0.112/2810.7.0.113 – 10.7.0.12610.7.0.127
910.7.0.128/2810.7.0.129 – 10.7.0.14210.7.0.143
1010.7.0.144/2810.7.0.145 – 10.7.0.15810.7.0.159
1110.7.0.160/2810.7.0.161 – 10.7.0.17410.7.0.175
1210.7.0.176/2810.7.0.177 – 10.7.0.19010.7.0.191
1310.7.0.192/2810.7.0.193 – 10.7.0.20610.7.0.207
1410.7.0.208/2810.7.0.209 – 10.7.0.22210.7.0.223
1510.7.0.224/2810.7.0.225 – 10.7.0.23810.7.0.239
1610.7.0.240/2810.7.0.241 – 10.7.0.25410.7.0.255
1710.7.1.0/2810.7.1.1 – 10.7.1.1410.7.1.15
1810.7.1.16/2810.7.1.17 – 10.7.1.3010.7.1.31
1910.7.1.32/2810.7.1.33 – 10.7.1.4610.7.1.47
2010.7.1.48/2810.7.1.49 – 10.7.1.6210.7.1.63
2110.7.1.64/2810.7.1.65 – 10.7.1.7810.7.1.79
2210.7.1.80/2810.7.1.81 – 10.7.1.9410.7.1.95
2310.7.1.96/2810.7.1.97 – 10.7.1.11010.7.1.111
2410.7.1.112/2810.7.1.113 – 10.7.1.12610.7.1.127
2510.7.1.128/2810.7.1.129 – 10.7.1.14210.7.1.143
2610.7.1.144/2810.7.1.145 – 10.7.1.15810.7.1.159
2710.7.1.160/2810.7.1.161 – 10.7.1.17410.7.1.175
2810.7.1.176/2810.7.1.177 – 10.7.1.19010.7.1.191
2910.7.1.192/2810.7.1.193 – 10.7.1.20610.7.1.207
3010.7.1.208/2810.7.1.209 – 10.7.1.22210.7.1.223
3110.7.1.224/2810.7.1.225 – 10.7.1.23810.7.1.239
3210.7.1.240/2810.7.1.241 – 10.7.1.25410.7.1.255
3310.7.2.0/2810.7.2.1 – 10.7.2.1410.7.2.15
3410.7.2.16/2810.7.2.17 – 10.7.2.3010.7.2.31
3510.7.2.32/2810.7.2.33 – 10.7.2.4610.7.2.47
3610.7.2.48/2810.7.2.49 – 10.7.2.6210.7.2.63
3710.7.2.64/2810.7.2.65 – 10.7.2.7810.7.2.79
3810.7.2.80/2810.7.2.81 – 10.7.2.9410.7.2.95
3910.7.2.96/2810.7.2.97 – 10.7.2.11010.7.2.111
4010.7.2.112/2810.7.2.113 – 10.7.2.12610.7.2.127
4110.7.2.128/2810.7.2.129 – 10.7.2.14210.7.2.143
4210.7.2.144/2810.7.2.145 – 10.7.2.15810.7.2.159
4310.7.2.160/2810.7.2.161 – 10.7.2.17410.7.2.175
4410.7.2.176/2810.7.2.177 – 10.7.2.19010.7.2.191
4510.7.2.192/2810.7.2.193 – 10.7.2.20610.7.2.207
4610.7.2.208/2810.7.2.209 – 10.7.2.22210.7.2.223
4710.7.2.224/2810.7.2.225 – 10.7.2.23810.7.2.239
4810.7.2.240/2810.7.2.241 – 10.7.2.25410.7.2.255
4910.7.3.0/2810.7.3.1 – 10.7.3.1410.7.3.15
5010.7.3.16/2810.7.3.17 – 10.7.3.3010.7.3.31
5110.7.3.32/2810.7.3.33 – 10.7.3.4610.7.3.47
5210.7.3.48/2810.7.3.49 – 10.7.3.6210.7.3.63
5310.7.3.64/2810.7.3.65 – 10.7.3.7810.7.3.79
5410.7.3.80/2810.7.3.81 – 10.7.3.9410.7.3.95
5510.7.3.96/2810.7.3.97 – 10.7.3.11010.7.3.111
5610.7.3.112/2810.7.3.113 – 10.7.3.12610.7.3.127
5710.7.3.128/2810.7.3.129 – 10.7.3.14210.7.3.143
5810.7.3.144/2810.7.3.145 – 10.7.3.15810.7.3.159
5910.7.3.160/2810.7.3.161 – 10.7.3.17410.7.3.175
6010.7.3.176/2810.7.3.177 – 10.7.3.19010.7.3.191
6110.7.3.192/2810.7.3.193 – 10.7.3.20610.7.3.207
6210.7.3.208/2810.7.3.209 – 10.7.3.22210.7.3.223
6310.7.3.224/2810.7.3.225 – 10.7.3.23810.7.3.239
6410.7.3.240/2810.7.3.241 – 10.7.3.25410.7.3.255
6510.7.4.0/2810.7.4.1 – 10.7.4.1410.7.4.15
6610.7.4.16/2810.7.4.17 – 10.7.4.3010.7.4.31
6710.7.4.32/2810.7.4.33 – 10.7.4.4610.7.4.47
6810.7.4.48/2810.7.4.49 – 10.7.4.6210.7.4.63
6910.7.4.64/2810.7.4.65 – 10.7.4.7810.7.4.79
7010.7.4.80/2810.7.4.81 – 10.7.4.9410.7.4.95
7110.7.4.96/2810.7.4.97 – 10.7.4.11010.7.4.111
7210.7.4.112/2810.7.4.113 – 10.7.4.12610.7.4.127
7310.7.4.128/2810.7.4.129 – 10.7.4.14210.7.4.143
7410.7.4.144/2810.7.4.145 – 10.7.4.15810.7.4.159
7510.7.4.160/2810.7.4.161 – 10.7.4.17410.7.4.175
7610.7.4.176/2810.7.4.177 – 10.7.4.19010.7.4.191
7710.7.4.192/2810.7.4.193 – 10.7.4.20610.7.4.207
7810.7.4.208/2810.7.4.209 – 10.7.4.22210.7.4.223
7910.7.4.224/2810.7.4.225 – 10.7.4.23810.7.4.239
8010.7.4.240/2810.7.4.241 – 10.7.4.25410.7.4.255
8110.7.5.0/2810.7.5.1 – 10.7.5.1410.7.5.15
8210.7.5.16/2810.7.5.17 – 10.7.5.3010.7.5.31
8310.7.5.32/2810.7.5.33 – 10.7.5.4610.7.5.47
8410.7.5.48/2810.7.5.49 – 10.7.5.6210.7.5.63
8510.7.5.64/2810.7.5.65 – 10.7.5.7810.7.5.79
8610.7.5.80/2810.7.5.81 – 10.7.5.9410.7.5.95
8710.7.5.96/2810.7.5.97 – 10.7.5.11010.7.5.111
8810.7.5.112/2810.7.5.113 – 10.7.5.12610.7.5.127
8910.7.5.128/2810.7.5.129 – 10.7.5.14210.7.5.143
9010.7.5.144/2810.7.5.145 – 10.7.5.15810.7.5.159
9110.7.5.160/2810.7.5.161 – 10.7.5.17410.7.5.175
9210.7.5.176/2810.7.5.177 – 10.7.5.19010.7.5.191
9310.7.5.192/2810.7.5.193 – 10.7.5.20610.7.5.207
9410.7.5.208/2810.7.5.209 – 10.7.5.22210.7.5.223
9510.7.5.224/2810.7.5.225 – 10.7.5.23810.7.5.239
9610.7.5.240/2810.7.5.241 – 10.7.5.25410.7.5.255
9710.7.6.0/2810.7.6.1 – 10.7.6.1410.7.6.15
9810.7.6.16/2810.7.6.17 – 10.7.6.3010.7.6.31
9910.7.6.32/2810.7.6.33 – 10.7.6.4610.7.6.47
10010.7.6.48/2810.7.6.49 – 10.7.6.6210.7.6.63
10110.7.6.64/2810.7.6.65 – 10.7.6.7810.7.6.79
10210.7.6.80/2810.7.6.81 – 10.7.6.9410.7.6.95
10310.7.6.96/2810.7.6.97 – 10.7.6.11010.7.6.111
10410.7.6.112/2810.7.6.113 – 10.7.6.12610.7.6.127
10510.7.6.128/2810.7.6.129 – 10.7.6.14210.7.6.143
10610.7.6.144/2810.7.6.145 – 10.7.6.15810.7.6.159
10710.7.6.160/2810.7.6.161 – 10.7.6.17410.7.6.175
10810.7.6.176/2810.7.6.177 – 10.7.6.19010.7.6.191
10910.7.6.192/2810.7.6.193 – 10.7.6.20610.7.6.207
11010.7.6.208/2810.7.6.209 – 10.7.6.22210.7.6.223
11110.7.6.224/2810.7.6.225 – 10.7.6.23810.7.6.239
11210.7.6.240/2810.7.6.241 – 10.7.6.25410.7.6.255
11310.7.7.0/2810.7.7.1 – 10.7.7.1410.7.7.15
11410.7.7.16/2810.7.7.17 – 10.7.7.3010.7.7.31
11510.7.7.32/2810.7.7.33 – 10.7.7.4610.7.7.47
11610.7.7.48/2810.7.7.49 – 10.7.7.6210.7.7.63
11710.7.7.64/2810.7.7.65 – 10.7.7.7810.7.7.79
11810.7.7.80/2810.7.7.81 – 10.7.7.9410.7.7.95
11910.7.7.96/2810.7.7.97 – 10.7.7.11010.7.7.111
12010.7.7.112/2810.7.7.113 – 10.7.7.12610.7.7.127
12110.7.7.128/2810.7.7.129 – 10.7.7.14210.7.7.143
12210.7.7.144/2810.7.7.145 – 10.7.7.15810.7.7.159
12310.7.7.160/2810.7.7.161 – 10.7.7.17410.7.7.175
12410.7.7.176/2810.7.7.177 – 10.7.7.19010.7.7.191
12510.7.7.192/2810.7.7.193 – 10.7.7.20610.7.7.207
12610.7.7.208/2810.7.7.209 – 10.7.7.22210.7.7.223
12710.7.7.224/2810.7.7.225 – 10.7.7.23810.7.7.239
12810.7.7.240/2810.7.7.241 – 10.7.7.25410.7.7.255
12910.7.8.0/2810.7.8.1 – 10.7.8.1410.7.8.15
13010.7.8.16/2810.7.8.17 – 10.7.8.3010.7.8.31
13110.7.8.32/2810.7.8.33 – 10.7.8.4610.7.8.47
13210.7.8.48/2810.7.8.49 – 10.7.8.6210.7.8.63
13310.7.8.64/2810.7.8.65 – 10.7.8.7810.7.8.79
13410.7.8.80/2810.7.8.81 – 10.7.8.9410.7.8.95
13510.7.8.96/2810.7.8.97 – 10.7.8.11010.7.8.111
13610.7.8.112/2810.7.8.113 – 10.7.8.12610.7.8.127
13710.7.8.128/2810.7.8.129 – 10.7.8.14210.7.8.143
13810.7.8.144/2810.7.8.145 – 10.7.8.15810.7.8.159
13910.7.8.160/2810.7.8.161 – 10.7.8.17410.7.8.175
14010.7.8.176/2810.7.8.177 – 10.7.8.19010.7.8.191
14110.7.8.192/2810.7.8.193 – 10.7.8.20610.7.8.207
14210.7.8.208/2810.7.8.209 – 10.7.8.22210.7.8.223
14310.7.8.224/2810.7.8.225 – 10.7.8.23810.7.8.239
14410.7.8.240/2810.7.8.241 – 10.7.8.25410.7.8.255
14510.7.9.0/2810.7.9.1 – 10.7.9.1410.7.9.15
14610.7.9.16/2810.7.9.17 – 10.7.9.3010.7.9.31
14710.7.9.32/2810.7.9.33 – 10.7.9.4610.7.9.47
14810.7.9.48/2810.7.9.49 – 10.7.9.6210.7.9.63
14910.7.9.64/2810.7.9.65 – 10.7.9.7810.7.9.79
15010.7.9.80/2810.7.9.81 – 10.7.9.9410.7.9.95
15110.7.9.96/2810.7.9.97 – 10.7.9.11010.7.9.111
15210.7.9.112/2810.7.9.113 – 10.7.9.12610.7.9.127
15310.7.9.128/2810.7.9.129 – 10.7.9.14210.7.9.143
15410.7.9.144/2810.7.9.145 – 10.7.9.15810.7.9.159
15510.7.9.160/2810.7.9.161 – 10.7.9.17410.7.9.175
15610.7.9.176/2810.7.9.177 – 10.7.9.19010.7.9.191
15710.7.9.192/2810.7.9.193 – 10.7.9.20610.7.9.207
15810.7.9.208/2810.7.9.209 – 10.7.9.22210.7.9.223
15910.7.9.224/2810.7.9.225 – 10.7.9.23810.7.9.239
16010.7.9.240/2810.7.9.241 – 10.7.9.25410.7.9.255
16110.7.10.0/2810.7.10.1 – 10.7.10.1410.7.10.15
16210.7.10.16/2810.7.10.17 – 10.7.10.3010.7.10.31
16310.7.10.32/2810.7.10.33 – 10.7.10.4610.7.10.47
16410.7.10.48/2810.7.10.49 – 10.7.10.6210.7.10.63
16510.7.10.64/2810.7.10.65 – 10.7.10.7810.7.10.79
16610.7.10.80/2810.7.10.81 – 10.7.10.9410.7.10.95
16710.7.10.96/2810.7.10.97 – 10.7.10.11010.7.10.111
16810.7.10.112/2810.7.10.113 – 10.7.10.12610.7.10.127
16910.7.10.128/2810.7.10.129 – 10.7.10.14210.7.10.143
17010.7.10.144/2810.7.10.145 – 10.7.10.15810.7.10.159
17110.7.10.160/2810.7.10.161 – 10.7.10.17410.7.10.175
17210.7.10.176/2810.7.10.177 – 10.7.10.19010.7.10.191
17310.7.10.192/2810.7.10.193 – 10.7.10.20610.7.10.207
17410.7.10.208/2810.7.10.209 – 10.7.10.22210.7.10.223
17510.7.10.224/2810.7.10.225 – 10.7.10.23810.7.10.239
17610.7.10.240/2810.7.10.241 – 10.7.10.25410.7.10.255
17710.7.11.0/2810.7.11.1 – 10.7.11.1410.7.11.15
17810.7.11.16/2810.7.11.17 – 10.7.11.3010.7.11.31
17910.7.11.32/2810.7.11.33 – 10.7.11.4610.7.11.47
18010.7.11.48/2810.7.11.49 – 10.7.11.6210.7.11.63
18110.7.11.64/2810.7.11.65 – 10.7.11.7810.7.11.79
18210.7.11.80/2810.7.11.81 – 10.7.11.9410.7.11.95
18310.7.11.96/2810.7.11.97 – 10.7.11.11010.7.11.111
18410.7.11.112/2810.7.11.113 – 10.7.11.12610.7.11.127
18510.7.11.128/2810.7.11.129 – 10.7.11.14210.7.11.143
18610.7.11.144/2810.7.11.145 – 10.7.11.15810.7.11.159
18710.7.11.160/2810.7.11.161 – 10.7.11.17410.7.11.175
18810.7.11.176/2810.7.11.177 – 10.7.11.19010.7.11.191
18910.7.11.192/2810.7.11.193 – 10.7.11.20610.7.11.207
19010.7.11.208/2810.7.11.209 – 10.7.11.22210.7.11.223
19110.7.11.224/2810.7.11.225 – 10.7.11.23810.7.11.239
19210.7.11.240/2810.7.11.241 – 10.7.11.25410.7.11.255
19310.7.12.0/2810.7.12.1 – 10.7.12.1410.7.12.15
19410.7.12.16/2810.7.12.17 – 10.7.12.3010.7.12.31
19510.7.12.32/2810.7.12.33 – 10.7.12.4610.7.12.47
19610.7.12.48/2810.7.12.49 – 10.7.12.6210.7.12.63
19710.7.12.64/2810.7.12.65 – 10.7.12.7810.7.12.79
19810.7.12.80/2810.7.12.81 – 10.7.12.9410.7.12.95
19910.7.12.96/2810.7.12.97 – 10.7.12.11010.7.12.111
20010.7.12.112/2810.7.12.113 – 10.7.12.12610.7.12.127
20110.7.12.128/2810.7.12.129 – 10.7.12.14210.7.12.143
20210.7.12.144/2810.7.12.145 – 10.7.12.15810.7.12.159
20310.7.12.160/2810.7.12.161 – 10.7.12.17410.7.12.175
20410.7.12.176/2810.7.12.177 – 10.7.12.19010.7.12.191
20510.7.12.192/2810.7.12.193 – 10.7.12.20610.7.12.207
20610.7.12.208/2810.7.12.209 – 10.7.12.22210.7.12.223
20710.7.12.224/2810.7.12.225 – 10.7.12.23810.7.12.239
20810.7.12.240/2810.7.12.241 – 10.7.12.25410.7.12.255
20910.7.13.0/2810.7.13.1 – 10.7.13.1410.7.13.15
21010.7.13.16/2810.7.13.17 – 10.7.13.3010.7.13.31
21110.7.13.32/2810.7.13.33 – 10.7.13.4610.7.13.47
21210.7.13.48/2810.7.13.49 – 10.7.13.6210.7.13.63
21310.7.13.64/2810.7.13.65 – 10.7.13.7810.7.13.79
21410.7.13.80/2810.7.13.81 – 10.7.13.9410.7.13.95
21510.7.13.96/2810.7.13.97 – 10.7.13.11010.7.13.111
21610.7.13.112/2810.7.13.113 – 10.7.13.12610.7.13.127
21710.7.13.128/2810.7.13.129 – 10.7.13.14210.7.13.143
21810.7.13.144/2810.7.13.145 – 10.7.13.15810.7.13.159
21910.7.13.160/2810.7.13.161 – 10.7.13.17410.7.13.175
22010.7.13.176/2810.7.13.177 – 10.7.13.19010.7.13.191
22110.7.13.192/2810.7.13.193 – 10.7.13.20610.7.13.207
22210.7.13.208/2810.7.13.209 – 10.7.13.22210.7.13.223
22310.7.13.224/2810.7.13.225 – 10.7.13.23810.7.13.239
22410.7.13.240/2810.7.13.241 – 10.7.13.25410.7.13.255
22510.7.14.0/2810.7.14.1 – 10.7.14.1410.7.14.15
22610.7.14.16/2810.7.14.17 – 10.7.14.3010.7.14.31
22710.7.14.32/2810.7.14.33 – 10.7.14.4610.7.14.47
22810.7.14.48/2810.7.14.49 – 10.7.14.6210.7.14.63
22910.7.14.64/2810.7.14.65 – 10.7.14.7810.7.14.79
23010.7.14.80/2810.7.14.81 – 10.7.14.9410.7.14.95
23110.7.14.96/2810.7.14.97 – 10.7.14.11010.7.14.111
23210.7.14.112/2810.7.14.113 – 10.7.14.12610.7.14.127
23310.7.14.128/2810.7.14.129 – 10.7.14.14210.7.14.143
23410.7.14.144/2810.7.14.145 – 10.7.14.15810.7.14.159
23510.7.14.160/2810.7.14.161 – 10.7.14.17410.7.14.175
23610.7.14.176/2810.7.14.177 – 10.7.14.19010.7.14.191
23710.7.14.192/2810.7.14.193 – 10.7.14.20610.7.14.207
23810.7.14.208/2810.7.14.209 – 10.7.14.22210.7.14.223
23910.7.14.224/2810.7.14.225 – 10.7.14.23810.7.14.239
24010.7.14.240/2810.7.14.241 – 10.7.14.25410.7.14.255
24110.7.15.0/2810.7.15.1 – 10.7.15.1410.7.15.15
24210.7.15.16/2810.7.15.17 – 10.7.15.3010.7.15.31
24310.7.15.32/2810.7.15.33 – 10.7.15.4610.7.15.47
24410.7.15.48/2810.7.15.49 – 10.7.15.6210.7.15.63
24510.7.15.64/2810.7.15.65 – 10.7.15.7810.7.15.79
24610.7.15.80/2810.7.15.81 – 10.7.15.9410.7.15.95
24710.7.15.96/2810.7.15.97 – 10.7.15.11010.7.15.111
24810.7.15.112/2810.7.15.113 – 10.7.15.12610.7.15.127
24910.7.15.128/2810.7.15.129 – 10.7.15.14210.7.15.143
25010.7.15.144/2810.7.15.145 – 10.7.15.15810.7.15.159
25110.7.15.160/2810.7.15.161 – 10.7.15.17410.7.15.175
25210.7.15.176/2810.7.15.177 – 10.7.15.19010.7.15.191
25310.7.15.192/2810.7.15.193 – 10.7.15.20610.7.15.207
25410.7.15.208/2810.7.15.209 – 10.7.15.22210.7.15.223
25510.7.15.224/2810.7.15.225 – 10.7.15.23810.7.15.239
25610.7.15.240/2810.7.15.241 – 10.7.15.25410.7.15.255

showing 256 of 2,048

01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /17
/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-
/17255.255.128.032,76832,7661
/18255.255.192.016,38416,3822 split →
/19255.255.224.08,1928,1904 split →
/20255.255.240.04,0964,0948 split →
/21255.255.248.02,0482,04616 split →
/22255.255.252.01,0241,02232 split →
/23255.255.254.051251064 split →
/24255.255.255.0256254128 split →
/25255.255.255.128128126256 split →
/26255.255.255.1926462512 split →
/27255.255.255.22432301,024 split →
/28255.255.255.24016142,048 split →
/29255.255.255.248864,096 split →
/30255.255.255.252428,192 split →
/31255.255.255.2542216,384 split →
/32255.255.255.2551132,768 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 →