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)10.42.128.0/18
network10.42.128.0/18
broadcast10.42.191.255
first host10.42.128.1
last host10.42.191.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.42.128.0/18
address00001010.00101010.10000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101010.10000000.00000000
broadcast00001010.00101010.10111111.11111111
green = network part, grey = host part
hex0x0a2a8000
decimal170557440
reverse dns0.128.42.10.in-addr.arpa
ipv4-mapped::ffff:a2a:8000

/18 split into /27 · 512 subnets

close ×
#networkhost rangebroadcast
110.42.128.0/2710.42.128.1 – 10.42.128.3010.42.128.31
210.42.128.32/2710.42.128.33 – 10.42.128.6210.42.128.63
310.42.128.64/2710.42.128.65 – 10.42.128.9410.42.128.95
410.42.128.96/2710.42.128.97 – 10.42.128.12610.42.128.127
510.42.128.128/2710.42.128.129 – 10.42.128.15810.42.128.159
610.42.128.160/2710.42.128.161 – 10.42.128.19010.42.128.191
710.42.128.192/2710.42.128.193 – 10.42.128.22210.42.128.223
810.42.128.224/2710.42.128.225 – 10.42.128.25410.42.128.255
910.42.129.0/2710.42.129.1 – 10.42.129.3010.42.129.31
1010.42.129.32/2710.42.129.33 – 10.42.129.6210.42.129.63
1110.42.129.64/2710.42.129.65 – 10.42.129.9410.42.129.95
1210.42.129.96/2710.42.129.97 – 10.42.129.12610.42.129.127
1310.42.129.128/2710.42.129.129 – 10.42.129.15810.42.129.159
1410.42.129.160/2710.42.129.161 – 10.42.129.19010.42.129.191
1510.42.129.192/2710.42.129.193 – 10.42.129.22210.42.129.223
1610.42.129.224/2710.42.129.225 – 10.42.129.25410.42.129.255
1710.42.130.0/2710.42.130.1 – 10.42.130.3010.42.130.31
1810.42.130.32/2710.42.130.33 – 10.42.130.6210.42.130.63
1910.42.130.64/2710.42.130.65 – 10.42.130.9410.42.130.95
2010.42.130.96/2710.42.130.97 – 10.42.130.12610.42.130.127
2110.42.130.128/2710.42.130.129 – 10.42.130.15810.42.130.159
2210.42.130.160/2710.42.130.161 – 10.42.130.19010.42.130.191
2310.42.130.192/2710.42.130.193 – 10.42.130.22210.42.130.223
2410.42.130.224/2710.42.130.225 – 10.42.130.25410.42.130.255
2510.42.131.0/2710.42.131.1 – 10.42.131.3010.42.131.31
2610.42.131.32/2710.42.131.33 – 10.42.131.6210.42.131.63
2710.42.131.64/2710.42.131.65 – 10.42.131.9410.42.131.95
2810.42.131.96/2710.42.131.97 – 10.42.131.12610.42.131.127
2910.42.131.128/2710.42.131.129 – 10.42.131.15810.42.131.159
3010.42.131.160/2710.42.131.161 – 10.42.131.19010.42.131.191
3110.42.131.192/2710.42.131.193 – 10.42.131.22210.42.131.223
3210.42.131.224/2710.42.131.225 – 10.42.131.25410.42.131.255
3310.42.132.0/2710.42.132.1 – 10.42.132.3010.42.132.31
3410.42.132.32/2710.42.132.33 – 10.42.132.6210.42.132.63
3510.42.132.64/2710.42.132.65 – 10.42.132.9410.42.132.95
3610.42.132.96/2710.42.132.97 – 10.42.132.12610.42.132.127
3710.42.132.128/2710.42.132.129 – 10.42.132.15810.42.132.159
3810.42.132.160/2710.42.132.161 – 10.42.132.19010.42.132.191
3910.42.132.192/2710.42.132.193 – 10.42.132.22210.42.132.223
4010.42.132.224/2710.42.132.225 – 10.42.132.25410.42.132.255
4110.42.133.0/2710.42.133.1 – 10.42.133.3010.42.133.31
4210.42.133.32/2710.42.133.33 – 10.42.133.6210.42.133.63
4310.42.133.64/2710.42.133.65 – 10.42.133.9410.42.133.95
4410.42.133.96/2710.42.133.97 – 10.42.133.12610.42.133.127
4510.42.133.128/2710.42.133.129 – 10.42.133.15810.42.133.159
4610.42.133.160/2710.42.133.161 – 10.42.133.19010.42.133.191
4710.42.133.192/2710.42.133.193 – 10.42.133.22210.42.133.223
4810.42.133.224/2710.42.133.225 – 10.42.133.25410.42.133.255
4910.42.134.0/2710.42.134.1 – 10.42.134.3010.42.134.31
5010.42.134.32/2710.42.134.33 – 10.42.134.6210.42.134.63
5110.42.134.64/2710.42.134.65 – 10.42.134.9410.42.134.95
5210.42.134.96/2710.42.134.97 – 10.42.134.12610.42.134.127
5310.42.134.128/2710.42.134.129 – 10.42.134.15810.42.134.159
5410.42.134.160/2710.42.134.161 – 10.42.134.19010.42.134.191
5510.42.134.192/2710.42.134.193 – 10.42.134.22210.42.134.223
5610.42.134.224/2710.42.134.225 – 10.42.134.25410.42.134.255
5710.42.135.0/2710.42.135.1 – 10.42.135.3010.42.135.31
5810.42.135.32/2710.42.135.33 – 10.42.135.6210.42.135.63
5910.42.135.64/2710.42.135.65 – 10.42.135.9410.42.135.95
6010.42.135.96/2710.42.135.97 – 10.42.135.12610.42.135.127
6110.42.135.128/2710.42.135.129 – 10.42.135.15810.42.135.159
6210.42.135.160/2710.42.135.161 – 10.42.135.19010.42.135.191
6310.42.135.192/2710.42.135.193 – 10.42.135.22210.42.135.223
6410.42.135.224/2710.42.135.225 – 10.42.135.25410.42.135.255
6510.42.136.0/2710.42.136.1 – 10.42.136.3010.42.136.31
6610.42.136.32/2710.42.136.33 – 10.42.136.6210.42.136.63
6710.42.136.64/2710.42.136.65 – 10.42.136.9410.42.136.95
6810.42.136.96/2710.42.136.97 – 10.42.136.12610.42.136.127
6910.42.136.128/2710.42.136.129 – 10.42.136.15810.42.136.159
7010.42.136.160/2710.42.136.161 – 10.42.136.19010.42.136.191
7110.42.136.192/2710.42.136.193 – 10.42.136.22210.42.136.223
7210.42.136.224/2710.42.136.225 – 10.42.136.25410.42.136.255
7310.42.137.0/2710.42.137.1 – 10.42.137.3010.42.137.31
7410.42.137.32/2710.42.137.33 – 10.42.137.6210.42.137.63
7510.42.137.64/2710.42.137.65 – 10.42.137.9410.42.137.95
7610.42.137.96/2710.42.137.97 – 10.42.137.12610.42.137.127
7710.42.137.128/2710.42.137.129 – 10.42.137.15810.42.137.159
7810.42.137.160/2710.42.137.161 – 10.42.137.19010.42.137.191
7910.42.137.192/2710.42.137.193 – 10.42.137.22210.42.137.223
8010.42.137.224/2710.42.137.225 – 10.42.137.25410.42.137.255
8110.42.138.0/2710.42.138.1 – 10.42.138.3010.42.138.31
8210.42.138.32/2710.42.138.33 – 10.42.138.6210.42.138.63
8310.42.138.64/2710.42.138.65 – 10.42.138.9410.42.138.95
8410.42.138.96/2710.42.138.97 – 10.42.138.12610.42.138.127
8510.42.138.128/2710.42.138.129 – 10.42.138.15810.42.138.159
8610.42.138.160/2710.42.138.161 – 10.42.138.19010.42.138.191
8710.42.138.192/2710.42.138.193 – 10.42.138.22210.42.138.223
8810.42.138.224/2710.42.138.225 – 10.42.138.25410.42.138.255
8910.42.139.0/2710.42.139.1 – 10.42.139.3010.42.139.31
9010.42.139.32/2710.42.139.33 – 10.42.139.6210.42.139.63
9110.42.139.64/2710.42.139.65 – 10.42.139.9410.42.139.95
9210.42.139.96/2710.42.139.97 – 10.42.139.12610.42.139.127
9310.42.139.128/2710.42.139.129 – 10.42.139.15810.42.139.159
9410.42.139.160/2710.42.139.161 – 10.42.139.19010.42.139.191
9510.42.139.192/2710.42.139.193 – 10.42.139.22210.42.139.223
9610.42.139.224/2710.42.139.225 – 10.42.139.25410.42.139.255
9710.42.140.0/2710.42.140.1 – 10.42.140.3010.42.140.31
9810.42.140.32/2710.42.140.33 – 10.42.140.6210.42.140.63
9910.42.140.64/2710.42.140.65 – 10.42.140.9410.42.140.95
10010.42.140.96/2710.42.140.97 – 10.42.140.12610.42.140.127
10110.42.140.128/2710.42.140.129 – 10.42.140.15810.42.140.159
10210.42.140.160/2710.42.140.161 – 10.42.140.19010.42.140.191
10310.42.140.192/2710.42.140.193 – 10.42.140.22210.42.140.223
10410.42.140.224/2710.42.140.225 – 10.42.140.25410.42.140.255
10510.42.141.0/2710.42.141.1 – 10.42.141.3010.42.141.31
10610.42.141.32/2710.42.141.33 – 10.42.141.6210.42.141.63
10710.42.141.64/2710.42.141.65 – 10.42.141.9410.42.141.95
10810.42.141.96/2710.42.141.97 – 10.42.141.12610.42.141.127
10910.42.141.128/2710.42.141.129 – 10.42.141.15810.42.141.159
11010.42.141.160/2710.42.141.161 – 10.42.141.19010.42.141.191
11110.42.141.192/2710.42.141.193 – 10.42.141.22210.42.141.223
11210.42.141.224/2710.42.141.225 – 10.42.141.25410.42.141.255
11310.42.142.0/2710.42.142.1 – 10.42.142.3010.42.142.31
11410.42.142.32/2710.42.142.33 – 10.42.142.6210.42.142.63
11510.42.142.64/2710.42.142.65 – 10.42.142.9410.42.142.95
11610.42.142.96/2710.42.142.97 – 10.42.142.12610.42.142.127
11710.42.142.128/2710.42.142.129 – 10.42.142.15810.42.142.159
11810.42.142.160/2710.42.142.161 – 10.42.142.19010.42.142.191
11910.42.142.192/2710.42.142.193 – 10.42.142.22210.42.142.223
12010.42.142.224/2710.42.142.225 – 10.42.142.25410.42.142.255
12110.42.143.0/2710.42.143.1 – 10.42.143.3010.42.143.31
12210.42.143.32/2710.42.143.33 – 10.42.143.6210.42.143.63
12310.42.143.64/2710.42.143.65 – 10.42.143.9410.42.143.95
12410.42.143.96/2710.42.143.97 – 10.42.143.12610.42.143.127
12510.42.143.128/2710.42.143.129 – 10.42.143.15810.42.143.159
12610.42.143.160/2710.42.143.161 – 10.42.143.19010.42.143.191
12710.42.143.192/2710.42.143.193 – 10.42.143.22210.42.143.223
12810.42.143.224/2710.42.143.225 – 10.42.143.25410.42.143.255
12910.42.144.0/2710.42.144.1 – 10.42.144.3010.42.144.31
13010.42.144.32/2710.42.144.33 – 10.42.144.6210.42.144.63
13110.42.144.64/2710.42.144.65 – 10.42.144.9410.42.144.95
13210.42.144.96/2710.42.144.97 – 10.42.144.12610.42.144.127
13310.42.144.128/2710.42.144.129 – 10.42.144.15810.42.144.159
13410.42.144.160/2710.42.144.161 – 10.42.144.19010.42.144.191
13510.42.144.192/2710.42.144.193 – 10.42.144.22210.42.144.223
13610.42.144.224/2710.42.144.225 – 10.42.144.25410.42.144.255
13710.42.145.0/2710.42.145.1 – 10.42.145.3010.42.145.31
13810.42.145.32/2710.42.145.33 – 10.42.145.6210.42.145.63
13910.42.145.64/2710.42.145.65 – 10.42.145.9410.42.145.95
14010.42.145.96/2710.42.145.97 – 10.42.145.12610.42.145.127
14110.42.145.128/2710.42.145.129 – 10.42.145.15810.42.145.159
14210.42.145.160/2710.42.145.161 – 10.42.145.19010.42.145.191
14310.42.145.192/2710.42.145.193 – 10.42.145.22210.42.145.223
14410.42.145.224/2710.42.145.225 – 10.42.145.25410.42.145.255
14510.42.146.0/2710.42.146.1 – 10.42.146.3010.42.146.31
14610.42.146.32/2710.42.146.33 – 10.42.146.6210.42.146.63
14710.42.146.64/2710.42.146.65 – 10.42.146.9410.42.146.95
14810.42.146.96/2710.42.146.97 – 10.42.146.12610.42.146.127
14910.42.146.128/2710.42.146.129 – 10.42.146.15810.42.146.159
15010.42.146.160/2710.42.146.161 – 10.42.146.19010.42.146.191
15110.42.146.192/2710.42.146.193 – 10.42.146.22210.42.146.223
15210.42.146.224/2710.42.146.225 – 10.42.146.25410.42.146.255
15310.42.147.0/2710.42.147.1 – 10.42.147.3010.42.147.31
15410.42.147.32/2710.42.147.33 – 10.42.147.6210.42.147.63
15510.42.147.64/2710.42.147.65 – 10.42.147.9410.42.147.95
15610.42.147.96/2710.42.147.97 – 10.42.147.12610.42.147.127
15710.42.147.128/2710.42.147.129 – 10.42.147.15810.42.147.159
15810.42.147.160/2710.42.147.161 – 10.42.147.19010.42.147.191
15910.42.147.192/2710.42.147.193 – 10.42.147.22210.42.147.223
16010.42.147.224/2710.42.147.225 – 10.42.147.25410.42.147.255
16110.42.148.0/2710.42.148.1 – 10.42.148.3010.42.148.31
16210.42.148.32/2710.42.148.33 – 10.42.148.6210.42.148.63
16310.42.148.64/2710.42.148.65 – 10.42.148.9410.42.148.95
16410.42.148.96/2710.42.148.97 – 10.42.148.12610.42.148.127
16510.42.148.128/2710.42.148.129 – 10.42.148.15810.42.148.159
16610.42.148.160/2710.42.148.161 – 10.42.148.19010.42.148.191
16710.42.148.192/2710.42.148.193 – 10.42.148.22210.42.148.223
16810.42.148.224/2710.42.148.225 – 10.42.148.25410.42.148.255
16910.42.149.0/2710.42.149.1 – 10.42.149.3010.42.149.31
17010.42.149.32/2710.42.149.33 – 10.42.149.6210.42.149.63
17110.42.149.64/2710.42.149.65 – 10.42.149.9410.42.149.95
17210.42.149.96/2710.42.149.97 – 10.42.149.12610.42.149.127
17310.42.149.128/2710.42.149.129 – 10.42.149.15810.42.149.159
17410.42.149.160/2710.42.149.161 – 10.42.149.19010.42.149.191
17510.42.149.192/2710.42.149.193 – 10.42.149.22210.42.149.223
17610.42.149.224/2710.42.149.225 – 10.42.149.25410.42.149.255
17710.42.150.0/2710.42.150.1 – 10.42.150.3010.42.150.31
17810.42.150.32/2710.42.150.33 – 10.42.150.6210.42.150.63
17910.42.150.64/2710.42.150.65 – 10.42.150.9410.42.150.95
18010.42.150.96/2710.42.150.97 – 10.42.150.12610.42.150.127
18110.42.150.128/2710.42.150.129 – 10.42.150.15810.42.150.159
18210.42.150.160/2710.42.150.161 – 10.42.150.19010.42.150.191
18310.42.150.192/2710.42.150.193 – 10.42.150.22210.42.150.223
18410.42.150.224/2710.42.150.225 – 10.42.150.25410.42.150.255
18510.42.151.0/2710.42.151.1 – 10.42.151.3010.42.151.31
18610.42.151.32/2710.42.151.33 – 10.42.151.6210.42.151.63
18710.42.151.64/2710.42.151.65 – 10.42.151.9410.42.151.95
18810.42.151.96/2710.42.151.97 – 10.42.151.12610.42.151.127
18910.42.151.128/2710.42.151.129 – 10.42.151.15810.42.151.159
19010.42.151.160/2710.42.151.161 – 10.42.151.19010.42.151.191
19110.42.151.192/2710.42.151.193 – 10.42.151.22210.42.151.223
19210.42.151.224/2710.42.151.225 – 10.42.151.25410.42.151.255
19310.42.152.0/2710.42.152.1 – 10.42.152.3010.42.152.31
19410.42.152.32/2710.42.152.33 – 10.42.152.6210.42.152.63
19510.42.152.64/2710.42.152.65 – 10.42.152.9410.42.152.95
19610.42.152.96/2710.42.152.97 – 10.42.152.12610.42.152.127
19710.42.152.128/2710.42.152.129 – 10.42.152.15810.42.152.159
19810.42.152.160/2710.42.152.161 – 10.42.152.19010.42.152.191
19910.42.152.192/2710.42.152.193 – 10.42.152.22210.42.152.223
20010.42.152.224/2710.42.152.225 – 10.42.152.25410.42.152.255
20110.42.153.0/2710.42.153.1 – 10.42.153.3010.42.153.31
20210.42.153.32/2710.42.153.33 – 10.42.153.6210.42.153.63
20310.42.153.64/2710.42.153.65 – 10.42.153.9410.42.153.95
20410.42.153.96/2710.42.153.97 – 10.42.153.12610.42.153.127
20510.42.153.128/2710.42.153.129 – 10.42.153.15810.42.153.159
20610.42.153.160/2710.42.153.161 – 10.42.153.19010.42.153.191
20710.42.153.192/2710.42.153.193 – 10.42.153.22210.42.153.223
20810.42.153.224/2710.42.153.225 – 10.42.153.25410.42.153.255
20910.42.154.0/2710.42.154.1 – 10.42.154.3010.42.154.31
21010.42.154.32/2710.42.154.33 – 10.42.154.6210.42.154.63
21110.42.154.64/2710.42.154.65 – 10.42.154.9410.42.154.95
21210.42.154.96/2710.42.154.97 – 10.42.154.12610.42.154.127
21310.42.154.128/2710.42.154.129 – 10.42.154.15810.42.154.159
21410.42.154.160/2710.42.154.161 – 10.42.154.19010.42.154.191
21510.42.154.192/2710.42.154.193 – 10.42.154.22210.42.154.223
21610.42.154.224/2710.42.154.225 – 10.42.154.25410.42.154.255
21710.42.155.0/2710.42.155.1 – 10.42.155.3010.42.155.31
21810.42.155.32/2710.42.155.33 – 10.42.155.6210.42.155.63
21910.42.155.64/2710.42.155.65 – 10.42.155.9410.42.155.95
22010.42.155.96/2710.42.155.97 – 10.42.155.12610.42.155.127
22110.42.155.128/2710.42.155.129 – 10.42.155.15810.42.155.159
22210.42.155.160/2710.42.155.161 – 10.42.155.19010.42.155.191
22310.42.155.192/2710.42.155.193 – 10.42.155.22210.42.155.223
22410.42.155.224/2710.42.155.225 – 10.42.155.25410.42.155.255
22510.42.156.0/2710.42.156.1 – 10.42.156.3010.42.156.31
22610.42.156.32/2710.42.156.33 – 10.42.156.6210.42.156.63
22710.42.156.64/2710.42.156.65 – 10.42.156.9410.42.156.95
22810.42.156.96/2710.42.156.97 – 10.42.156.12610.42.156.127
22910.42.156.128/2710.42.156.129 – 10.42.156.15810.42.156.159
23010.42.156.160/2710.42.156.161 – 10.42.156.19010.42.156.191
23110.42.156.192/2710.42.156.193 – 10.42.156.22210.42.156.223
23210.42.156.224/2710.42.156.225 – 10.42.156.25410.42.156.255
23310.42.157.0/2710.42.157.1 – 10.42.157.3010.42.157.31
23410.42.157.32/2710.42.157.33 – 10.42.157.6210.42.157.63
23510.42.157.64/2710.42.157.65 – 10.42.157.9410.42.157.95
23610.42.157.96/2710.42.157.97 – 10.42.157.12610.42.157.127
23710.42.157.128/2710.42.157.129 – 10.42.157.15810.42.157.159
23810.42.157.160/2710.42.157.161 – 10.42.157.19010.42.157.191
23910.42.157.192/2710.42.157.193 – 10.42.157.22210.42.157.223
24010.42.157.224/2710.42.157.225 – 10.42.157.25410.42.157.255
24110.42.158.0/2710.42.158.1 – 10.42.158.3010.42.158.31
24210.42.158.32/2710.42.158.33 – 10.42.158.6210.42.158.63
24310.42.158.64/2710.42.158.65 – 10.42.158.9410.42.158.95
24410.42.158.96/2710.42.158.97 – 10.42.158.12610.42.158.127
24510.42.158.128/2710.42.158.129 – 10.42.158.15810.42.158.159
24610.42.158.160/2710.42.158.161 – 10.42.158.19010.42.158.191
24710.42.158.192/2710.42.158.193 – 10.42.158.22210.42.158.223
24810.42.158.224/2710.42.158.225 – 10.42.158.25410.42.158.255
24910.42.159.0/2710.42.159.1 – 10.42.159.3010.42.159.31
25010.42.159.32/2710.42.159.33 – 10.42.159.6210.42.159.63
25110.42.159.64/2710.42.159.65 – 10.42.159.9410.42.159.95
25210.42.159.96/2710.42.159.97 – 10.42.159.12610.42.159.127
25310.42.159.128/2710.42.159.129 – 10.42.159.15810.42.159.159
25410.42.159.160/2710.42.159.161 – 10.42.159.19010.42.159.191
25510.42.159.192/2710.42.159.193 – 10.42.159.22210.42.159.223
25610.42.159.224/2710.42.159.225 – 10.42.159.25410.42.159.255

showing 256 of 512

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 →