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)10.42.0.0/18
network10.42.0.0/18
broadcast10.42.63.255
first host10.42.0.1
last host10.42.63.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.42.0.0/18
address00001010.00101010.00000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101010.00000000.00000000
broadcast00001010.00101010.00111111.11111111
green = network part, grey = host part
hex0x0a2a0000
decimal170524672
reverse dns0.0.42.10.in-addr.arpa
ipv4-mapped::ffff:a2a:0

/18 split into /28 · 1,024 subnets

close ×
#networkhost rangebroadcast
110.42.0.0/2810.42.0.1 – 10.42.0.1410.42.0.15
210.42.0.16/2810.42.0.17 – 10.42.0.3010.42.0.31
310.42.0.32/2810.42.0.33 – 10.42.0.4610.42.0.47
410.42.0.48/2810.42.0.49 – 10.42.0.6210.42.0.63
510.42.0.64/2810.42.0.65 – 10.42.0.7810.42.0.79
610.42.0.80/2810.42.0.81 – 10.42.0.9410.42.0.95
710.42.0.96/2810.42.0.97 – 10.42.0.11010.42.0.111
810.42.0.112/2810.42.0.113 – 10.42.0.12610.42.0.127
910.42.0.128/2810.42.0.129 – 10.42.0.14210.42.0.143
1010.42.0.144/2810.42.0.145 – 10.42.0.15810.42.0.159
1110.42.0.160/2810.42.0.161 – 10.42.0.17410.42.0.175
1210.42.0.176/2810.42.0.177 – 10.42.0.19010.42.0.191
1310.42.0.192/2810.42.0.193 – 10.42.0.20610.42.0.207
1410.42.0.208/2810.42.0.209 – 10.42.0.22210.42.0.223
1510.42.0.224/2810.42.0.225 – 10.42.0.23810.42.0.239
1610.42.0.240/2810.42.0.241 – 10.42.0.25410.42.0.255
1710.42.1.0/2810.42.1.1 – 10.42.1.1410.42.1.15
1810.42.1.16/2810.42.1.17 – 10.42.1.3010.42.1.31
1910.42.1.32/2810.42.1.33 – 10.42.1.4610.42.1.47
2010.42.1.48/2810.42.1.49 – 10.42.1.6210.42.1.63
2110.42.1.64/2810.42.1.65 – 10.42.1.7810.42.1.79
2210.42.1.80/2810.42.1.81 – 10.42.1.9410.42.1.95
2310.42.1.96/2810.42.1.97 – 10.42.1.11010.42.1.111
2410.42.1.112/2810.42.1.113 – 10.42.1.12610.42.1.127
2510.42.1.128/2810.42.1.129 – 10.42.1.14210.42.1.143
2610.42.1.144/2810.42.1.145 – 10.42.1.15810.42.1.159
2710.42.1.160/2810.42.1.161 – 10.42.1.17410.42.1.175
2810.42.1.176/2810.42.1.177 – 10.42.1.19010.42.1.191
2910.42.1.192/2810.42.1.193 – 10.42.1.20610.42.1.207
3010.42.1.208/2810.42.1.209 – 10.42.1.22210.42.1.223
3110.42.1.224/2810.42.1.225 – 10.42.1.23810.42.1.239
3210.42.1.240/2810.42.1.241 – 10.42.1.25410.42.1.255
3310.42.2.0/2810.42.2.1 – 10.42.2.1410.42.2.15
3410.42.2.16/2810.42.2.17 – 10.42.2.3010.42.2.31
3510.42.2.32/2810.42.2.33 – 10.42.2.4610.42.2.47
3610.42.2.48/2810.42.2.49 – 10.42.2.6210.42.2.63
3710.42.2.64/2810.42.2.65 – 10.42.2.7810.42.2.79
3810.42.2.80/2810.42.2.81 – 10.42.2.9410.42.2.95
3910.42.2.96/2810.42.2.97 – 10.42.2.11010.42.2.111
4010.42.2.112/2810.42.2.113 – 10.42.2.12610.42.2.127
4110.42.2.128/2810.42.2.129 – 10.42.2.14210.42.2.143
4210.42.2.144/2810.42.2.145 – 10.42.2.15810.42.2.159
4310.42.2.160/2810.42.2.161 – 10.42.2.17410.42.2.175
4410.42.2.176/2810.42.2.177 – 10.42.2.19010.42.2.191
4510.42.2.192/2810.42.2.193 – 10.42.2.20610.42.2.207
4610.42.2.208/2810.42.2.209 – 10.42.2.22210.42.2.223
4710.42.2.224/2810.42.2.225 – 10.42.2.23810.42.2.239
4810.42.2.240/2810.42.2.241 – 10.42.2.25410.42.2.255
4910.42.3.0/2810.42.3.1 – 10.42.3.1410.42.3.15
5010.42.3.16/2810.42.3.17 – 10.42.3.3010.42.3.31
5110.42.3.32/2810.42.3.33 – 10.42.3.4610.42.3.47
5210.42.3.48/2810.42.3.49 – 10.42.3.6210.42.3.63
5310.42.3.64/2810.42.3.65 – 10.42.3.7810.42.3.79
5410.42.3.80/2810.42.3.81 – 10.42.3.9410.42.3.95
5510.42.3.96/2810.42.3.97 – 10.42.3.11010.42.3.111
5610.42.3.112/2810.42.3.113 – 10.42.3.12610.42.3.127
5710.42.3.128/2810.42.3.129 – 10.42.3.14210.42.3.143
5810.42.3.144/2810.42.3.145 – 10.42.3.15810.42.3.159
5910.42.3.160/2810.42.3.161 – 10.42.3.17410.42.3.175
6010.42.3.176/2810.42.3.177 – 10.42.3.19010.42.3.191
6110.42.3.192/2810.42.3.193 – 10.42.3.20610.42.3.207
6210.42.3.208/2810.42.3.209 – 10.42.3.22210.42.3.223
6310.42.3.224/2810.42.3.225 – 10.42.3.23810.42.3.239
6410.42.3.240/2810.42.3.241 – 10.42.3.25410.42.3.255
6510.42.4.0/2810.42.4.1 – 10.42.4.1410.42.4.15
6610.42.4.16/2810.42.4.17 – 10.42.4.3010.42.4.31
6710.42.4.32/2810.42.4.33 – 10.42.4.4610.42.4.47
6810.42.4.48/2810.42.4.49 – 10.42.4.6210.42.4.63
6910.42.4.64/2810.42.4.65 – 10.42.4.7810.42.4.79
7010.42.4.80/2810.42.4.81 – 10.42.4.9410.42.4.95
7110.42.4.96/2810.42.4.97 – 10.42.4.11010.42.4.111
7210.42.4.112/2810.42.4.113 – 10.42.4.12610.42.4.127
7310.42.4.128/2810.42.4.129 – 10.42.4.14210.42.4.143
7410.42.4.144/2810.42.4.145 – 10.42.4.15810.42.4.159
7510.42.4.160/2810.42.4.161 – 10.42.4.17410.42.4.175
7610.42.4.176/2810.42.4.177 – 10.42.4.19010.42.4.191
7710.42.4.192/2810.42.4.193 – 10.42.4.20610.42.4.207
7810.42.4.208/2810.42.4.209 – 10.42.4.22210.42.4.223
7910.42.4.224/2810.42.4.225 – 10.42.4.23810.42.4.239
8010.42.4.240/2810.42.4.241 – 10.42.4.25410.42.4.255
8110.42.5.0/2810.42.5.1 – 10.42.5.1410.42.5.15
8210.42.5.16/2810.42.5.17 – 10.42.5.3010.42.5.31
8310.42.5.32/2810.42.5.33 – 10.42.5.4610.42.5.47
8410.42.5.48/2810.42.5.49 – 10.42.5.6210.42.5.63
8510.42.5.64/2810.42.5.65 – 10.42.5.7810.42.5.79
8610.42.5.80/2810.42.5.81 – 10.42.5.9410.42.5.95
8710.42.5.96/2810.42.5.97 – 10.42.5.11010.42.5.111
8810.42.5.112/2810.42.5.113 – 10.42.5.12610.42.5.127
8910.42.5.128/2810.42.5.129 – 10.42.5.14210.42.5.143
9010.42.5.144/2810.42.5.145 – 10.42.5.15810.42.5.159
9110.42.5.160/2810.42.5.161 – 10.42.5.17410.42.5.175
9210.42.5.176/2810.42.5.177 – 10.42.5.19010.42.5.191
9310.42.5.192/2810.42.5.193 – 10.42.5.20610.42.5.207
9410.42.5.208/2810.42.5.209 – 10.42.5.22210.42.5.223
9510.42.5.224/2810.42.5.225 – 10.42.5.23810.42.5.239
9610.42.5.240/2810.42.5.241 – 10.42.5.25410.42.5.255
9710.42.6.0/2810.42.6.1 – 10.42.6.1410.42.6.15
9810.42.6.16/2810.42.6.17 – 10.42.6.3010.42.6.31
9910.42.6.32/2810.42.6.33 – 10.42.6.4610.42.6.47
10010.42.6.48/2810.42.6.49 – 10.42.6.6210.42.6.63
10110.42.6.64/2810.42.6.65 – 10.42.6.7810.42.6.79
10210.42.6.80/2810.42.6.81 – 10.42.6.9410.42.6.95
10310.42.6.96/2810.42.6.97 – 10.42.6.11010.42.6.111
10410.42.6.112/2810.42.6.113 – 10.42.6.12610.42.6.127
10510.42.6.128/2810.42.6.129 – 10.42.6.14210.42.6.143
10610.42.6.144/2810.42.6.145 – 10.42.6.15810.42.6.159
10710.42.6.160/2810.42.6.161 – 10.42.6.17410.42.6.175
10810.42.6.176/2810.42.6.177 – 10.42.6.19010.42.6.191
10910.42.6.192/2810.42.6.193 – 10.42.6.20610.42.6.207
11010.42.6.208/2810.42.6.209 – 10.42.6.22210.42.6.223
11110.42.6.224/2810.42.6.225 – 10.42.6.23810.42.6.239
11210.42.6.240/2810.42.6.241 – 10.42.6.25410.42.6.255
11310.42.7.0/2810.42.7.1 – 10.42.7.1410.42.7.15
11410.42.7.16/2810.42.7.17 – 10.42.7.3010.42.7.31
11510.42.7.32/2810.42.7.33 – 10.42.7.4610.42.7.47
11610.42.7.48/2810.42.7.49 – 10.42.7.6210.42.7.63
11710.42.7.64/2810.42.7.65 – 10.42.7.7810.42.7.79
11810.42.7.80/2810.42.7.81 – 10.42.7.9410.42.7.95
11910.42.7.96/2810.42.7.97 – 10.42.7.11010.42.7.111
12010.42.7.112/2810.42.7.113 – 10.42.7.12610.42.7.127
12110.42.7.128/2810.42.7.129 – 10.42.7.14210.42.7.143
12210.42.7.144/2810.42.7.145 – 10.42.7.15810.42.7.159
12310.42.7.160/2810.42.7.161 – 10.42.7.17410.42.7.175
12410.42.7.176/2810.42.7.177 – 10.42.7.19010.42.7.191
12510.42.7.192/2810.42.7.193 – 10.42.7.20610.42.7.207
12610.42.7.208/2810.42.7.209 – 10.42.7.22210.42.7.223
12710.42.7.224/2810.42.7.225 – 10.42.7.23810.42.7.239
12810.42.7.240/2810.42.7.241 – 10.42.7.25410.42.7.255
12910.42.8.0/2810.42.8.1 – 10.42.8.1410.42.8.15
13010.42.8.16/2810.42.8.17 – 10.42.8.3010.42.8.31
13110.42.8.32/2810.42.8.33 – 10.42.8.4610.42.8.47
13210.42.8.48/2810.42.8.49 – 10.42.8.6210.42.8.63
13310.42.8.64/2810.42.8.65 – 10.42.8.7810.42.8.79
13410.42.8.80/2810.42.8.81 – 10.42.8.9410.42.8.95
13510.42.8.96/2810.42.8.97 – 10.42.8.11010.42.8.111
13610.42.8.112/2810.42.8.113 – 10.42.8.12610.42.8.127
13710.42.8.128/2810.42.8.129 – 10.42.8.14210.42.8.143
13810.42.8.144/2810.42.8.145 – 10.42.8.15810.42.8.159
13910.42.8.160/2810.42.8.161 – 10.42.8.17410.42.8.175
14010.42.8.176/2810.42.8.177 – 10.42.8.19010.42.8.191
14110.42.8.192/2810.42.8.193 – 10.42.8.20610.42.8.207
14210.42.8.208/2810.42.8.209 – 10.42.8.22210.42.8.223
14310.42.8.224/2810.42.8.225 – 10.42.8.23810.42.8.239
14410.42.8.240/2810.42.8.241 – 10.42.8.25410.42.8.255
14510.42.9.0/2810.42.9.1 – 10.42.9.1410.42.9.15
14610.42.9.16/2810.42.9.17 – 10.42.9.3010.42.9.31
14710.42.9.32/2810.42.9.33 – 10.42.9.4610.42.9.47
14810.42.9.48/2810.42.9.49 – 10.42.9.6210.42.9.63
14910.42.9.64/2810.42.9.65 – 10.42.9.7810.42.9.79
15010.42.9.80/2810.42.9.81 – 10.42.9.9410.42.9.95
15110.42.9.96/2810.42.9.97 – 10.42.9.11010.42.9.111
15210.42.9.112/2810.42.9.113 – 10.42.9.12610.42.9.127
15310.42.9.128/2810.42.9.129 – 10.42.9.14210.42.9.143
15410.42.9.144/2810.42.9.145 – 10.42.9.15810.42.9.159
15510.42.9.160/2810.42.9.161 – 10.42.9.17410.42.9.175
15610.42.9.176/2810.42.9.177 – 10.42.9.19010.42.9.191
15710.42.9.192/2810.42.9.193 – 10.42.9.20610.42.9.207
15810.42.9.208/2810.42.9.209 – 10.42.9.22210.42.9.223
15910.42.9.224/2810.42.9.225 – 10.42.9.23810.42.9.239
16010.42.9.240/2810.42.9.241 – 10.42.9.25410.42.9.255
16110.42.10.0/2810.42.10.1 – 10.42.10.1410.42.10.15
16210.42.10.16/2810.42.10.17 – 10.42.10.3010.42.10.31
16310.42.10.32/2810.42.10.33 – 10.42.10.4610.42.10.47
16410.42.10.48/2810.42.10.49 – 10.42.10.6210.42.10.63
16510.42.10.64/2810.42.10.65 – 10.42.10.7810.42.10.79
16610.42.10.80/2810.42.10.81 – 10.42.10.9410.42.10.95
16710.42.10.96/2810.42.10.97 – 10.42.10.11010.42.10.111
16810.42.10.112/2810.42.10.113 – 10.42.10.12610.42.10.127
16910.42.10.128/2810.42.10.129 – 10.42.10.14210.42.10.143
17010.42.10.144/2810.42.10.145 – 10.42.10.15810.42.10.159
17110.42.10.160/2810.42.10.161 – 10.42.10.17410.42.10.175
17210.42.10.176/2810.42.10.177 – 10.42.10.19010.42.10.191
17310.42.10.192/2810.42.10.193 – 10.42.10.20610.42.10.207
17410.42.10.208/2810.42.10.209 – 10.42.10.22210.42.10.223
17510.42.10.224/2810.42.10.225 – 10.42.10.23810.42.10.239
17610.42.10.240/2810.42.10.241 – 10.42.10.25410.42.10.255
17710.42.11.0/2810.42.11.1 – 10.42.11.1410.42.11.15
17810.42.11.16/2810.42.11.17 – 10.42.11.3010.42.11.31
17910.42.11.32/2810.42.11.33 – 10.42.11.4610.42.11.47
18010.42.11.48/2810.42.11.49 – 10.42.11.6210.42.11.63
18110.42.11.64/2810.42.11.65 – 10.42.11.7810.42.11.79
18210.42.11.80/2810.42.11.81 – 10.42.11.9410.42.11.95
18310.42.11.96/2810.42.11.97 – 10.42.11.11010.42.11.111
18410.42.11.112/2810.42.11.113 – 10.42.11.12610.42.11.127
18510.42.11.128/2810.42.11.129 – 10.42.11.14210.42.11.143
18610.42.11.144/2810.42.11.145 – 10.42.11.15810.42.11.159
18710.42.11.160/2810.42.11.161 – 10.42.11.17410.42.11.175
18810.42.11.176/2810.42.11.177 – 10.42.11.19010.42.11.191
18910.42.11.192/2810.42.11.193 – 10.42.11.20610.42.11.207
19010.42.11.208/2810.42.11.209 – 10.42.11.22210.42.11.223
19110.42.11.224/2810.42.11.225 – 10.42.11.23810.42.11.239
19210.42.11.240/2810.42.11.241 – 10.42.11.25410.42.11.255
19310.42.12.0/2810.42.12.1 – 10.42.12.1410.42.12.15
19410.42.12.16/2810.42.12.17 – 10.42.12.3010.42.12.31
19510.42.12.32/2810.42.12.33 – 10.42.12.4610.42.12.47
19610.42.12.48/2810.42.12.49 – 10.42.12.6210.42.12.63
19710.42.12.64/2810.42.12.65 – 10.42.12.7810.42.12.79
19810.42.12.80/2810.42.12.81 – 10.42.12.9410.42.12.95
19910.42.12.96/2810.42.12.97 – 10.42.12.11010.42.12.111
20010.42.12.112/2810.42.12.113 – 10.42.12.12610.42.12.127
20110.42.12.128/2810.42.12.129 – 10.42.12.14210.42.12.143
20210.42.12.144/2810.42.12.145 – 10.42.12.15810.42.12.159
20310.42.12.160/2810.42.12.161 – 10.42.12.17410.42.12.175
20410.42.12.176/2810.42.12.177 – 10.42.12.19010.42.12.191
20510.42.12.192/2810.42.12.193 – 10.42.12.20610.42.12.207
20610.42.12.208/2810.42.12.209 – 10.42.12.22210.42.12.223
20710.42.12.224/2810.42.12.225 – 10.42.12.23810.42.12.239
20810.42.12.240/2810.42.12.241 – 10.42.12.25410.42.12.255
20910.42.13.0/2810.42.13.1 – 10.42.13.1410.42.13.15
21010.42.13.16/2810.42.13.17 – 10.42.13.3010.42.13.31
21110.42.13.32/2810.42.13.33 – 10.42.13.4610.42.13.47
21210.42.13.48/2810.42.13.49 – 10.42.13.6210.42.13.63
21310.42.13.64/2810.42.13.65 – 10.42.13.7810.42.13.79
21410.42.13.80/2810.42.13.81 – 10.42.13.9410.42.13.95
21510.42.13.96/2810.42.13.97 – 10.42.13.11010.42.13.111
21610.42.13.112/2810.42.13.113 – 10.42.13.12610.42.13.127
21710.42.13.128/2810.42.13.129 – 10.42.13.14210.42.13.143
21810.42.13.144/2810.42.13.145 – 10.42.13.15810.42.13.159
21910.42.13.160/2810.42.13.161 – 10.42.13.17410.42.13.175
22010.42.13.176/2810.42.13.177 – 10.42.13.19010.42.13.191
22110.42.13.192/2810.42.13.193 – 10.42.13.20610.42.13.207
22210.42.13.208/2810.42.13.209 – 10.42.13.22210.42.13.223
22310.42.13.224/2810.42.13.225 – 10.42.13.23810.42.13.239
22410.42.13.240/2810.42.13.241 – 10.42.13.25410.42.13.255
22510.42.14.0/2810.42.14.1 – 10.42.14.1410.42.14.15
22610.42.14.16/2810.42.14.17 – 10.42.14.3010.42.14.31
22710.42.14.32/2810.42.14.33 – 10.42.14.4610.42.14.47
22810.42.14.48/2810.42.14.49 – 10.42.14.6210.42.14.63
22910.42.14.64/2810.42.14.65 – 10.42.14.7810.42.14.79
23010.42.14.80/2810.42.14.81 – 10.42.14.9410.42.14.95
23110.42.14.96/2810.42.14.97 – 10.42.14.11010.42.14.111
23210.42.14.112/2810.42.14.113 – 10.42.14.12610.42.14.127
23310.42.14.128/2810.42.14.129 – 10.42.14.14210.42.14.143
23410.42.14.144/2810.42.14.145 – 10.42.14.15810.42.14.159
23510.42.14.160/2810.42.14.161 – 10.42.14.17410.42.14.175
23610.42.14.176/2810.42.14.177 – 10.42.14.19010.42.14.191
23710.42.14.192/2810.42.14.193 – 10.42.14.20610.42.14.207
23810.42.14.208/2810.42.14.209 – 10.42.14.22210.42.14.223
23910.42.14.224/2810.42.14.225 – 10.42.14.23810.42.14.239
24010.42.14.240/2810.42.14.241 – 10.42.14.25410.42.14.255
24110.42.15.0/2810.42.15.1 – 10.42.15.1410.42.15.15
24210.42.15.16/2810.42.15.17 – 10.42.15.3010.42.15.31
24310.42.15.32/2810.42.15.33 – 10.42.15.4610.42.15.47
24410.42.15.48/2810.42.15.49 – 10.42.15.6210.42.15.63
24510.42.15.64/2810.42.15.65 – 10.42.15.7810.42.15.79
24610.42.15.80/2810.42.15.81 – 10.42.15.9410.42.15.95
24710.42.15.96/2810.42.15.97 – 10.42.15.11010.42.15.111
24810.42.15.112/2810.42.15.113 – 10.42.15.12610.42.15.127
24910.42.15.128/2810.42.15.129 – 10.42.15.14210.42.15.143
25010.42.15.144/2810.42.15.145 – 10.42.15.15810.42.15.159
25110.42.15.160/2810.42.15.161 – 10.42.15.17410.42.15.175
25210.42.15.176/2810.42.15.177 – 10.42.15.19010.42.15.191
25310.42.15.192/2810.42.15.193 – 10.42.15.20610.42.15.207
25410.42.15.208/2810.42.15.209 – 10.42.15.22210.42.15.223
25510.42.15.224/2810.42.15.225 – 10.42.15.23810.42.15.239
25610.42.15.240/2810.42.15.241 – 10.42.15.25410.42.15.255

showing 256 of 1,024

01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /18
/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-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →