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)10.78.0.0/17
network10.78.0.0/17
broadcast10.78.127.255
first host10.78.0.1
last host10.78.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.78.0.0/17
address00001010.01001110.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01001110.00000000.00000000
broadcast00001010.01001110.01111111.11111111
green = network part, grey = host part
hex0x0a4e0000
decimal172883968
reverse dns0.0.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:0

/17 split into /26 · 512 subnets

close ×
#networkhost rangebroadcast
110.78.0.0/2610.78.0.1 – 10.78.0.6210.78.0.63
210.78.0.64/2610.78.0.65 – 10.78.0.12610.78.0.127
310.78.0.128/2610.78.0.129 – 10.78.0.19010.78.0.191
410.78.0.192/2610.78.0.193 – 10.78.0.25410.78.0.255
510.78.1.0/2610.78.1.1 – 10.78.1.6210.78.1.63
610.78.1.64/2610.78.1.65 – 10.78.1.12610.78.1.127
710.78.1.128/2610.78.1.129 – 10.78.1.19010.78.1.191
810.78.1.192/2610.78.1.193 – 10.78.1.25410.78.1.255
910.78.2.0/2610.78.2.1 – 10.78.2.6210.78.2.63
1010.78.2.64/2610.78.2.65 – 10.78.2.12610.78.2.127
1110.78.2.128/2610.78.2.129 – 10.78.2.19010.78.2.191
1210.78.2.192/2610.78.2.193 – 10.78.2.25410.78.2.255
1310.78.3.0/2610.78.3.1 – 10.78.3.6210.78.3.63
1410.78.3.64/2610.78.3.65 – 10.78.3.12610.78.3.127
1510.78.3.128/2610.78.3.129 – 10.78.3.19010.78.3.191
1610.78.3.192/2610.78.3.193 – 10.78.3.25410.78.3.255
1710.78.4.0/2610.78.4.1 – 10.78.4.6210.78.4.63
1810.78.4.64/2610.78.4.65 – 10.78.4.12610.78.4.127
1910.78.4.128/2610.78.4.129 – 10.78.4.19010.78.4.191
2010.78.4.192/2610.78.4.193 – 10.78.4.25410.78.4.255
2110.78.5.0/2610.78.5.1 – 10.78.5.6210.78.5.63
2210.78.5.64/2610.78.5.65 – 10.78.5.12610.78.5.127
2310.78.5.128/2610.78.5.129 – 10.78.5.19010.78.5.191
2410.78.5.192/2610.78.5.193 – 10.78.5.25410.78.5.255
2510.78.6.0/2610.78.6.1 – 10.78.6.6210.78.6.63
2610.78.6.64/2610.78.6.65 – 10.78.6.12610.78.6.127
2710.78.6.128/2610.78.6.129 – 10.78.6.19010.78.6.191
2810.78.6.192/2610.78.6.193 – 10.78.6.25410.78.6.255
2910.78.7.0/2610.78.7.1 – 10.78.7.6210.78.7.63
3010.78.7.64/2610.78.7.65 – 10.78.7.12610.78.7.127
3110.78.7.128/2610.78.7.129 – 10.78.7.19010.78.7.191
3210.78.7.192/2610.78.7.193 – 10.78.7.25410.78.7.255
3310.78.8.0/2610.78.8.1 – 10.78.8.6210.78.8.63
3410.78.8.64/2610.78.8.65 – 10.78.8.12610.78.8.127
3510.78.8.128/2610.78.8.129 – 10.78.8.19010.78.8.191
3610.78.8.192/2610.78.8.193 – 10.78.8.25410.78.8.255
3710.78.9.0/2610.78.9.1 – 10.78.9.6210.78.9.63
3810.78.9.64/2610.78.9.65 – 10.78.9.12610.78.9.127
3910.78.9.128/2610.78.9.129 – 10.78.9.19010.78.9.191
4010.78.9.192/2610.78.9.193 – 10.78.9.25410.78.9.255
4110.78.10.0/2610.78.10.1 – 10.78.10.6210.78.10.63
4210.78.10.64/2610.78.10.65 – 10.78.10.12610.78.10.127
4310.78.10.128/2610.78.10.129 – 10.78.10.19010.78.10.191
4410.78.10.192/2610.78.10.193 – 10.78.10.25410.78.10.255
4510.78.11.0/2610.78.11.1 – 10.78.11.6210.78.11.63
4610.78.11.64/2610.78.11.65 – 10.78.11.12610.78.11.127
4710.78.11.128/2610.78.11.129 – 10.78.11.19010.78.11.191
4810.78.11.192/2610.78.11.193 – 10.78.11.25410.78.11.255
4910.78.12.0/2610.78.12.1 – 10.78.12.6210.78.12.63
5010.78.12.64/2610.78.12.65 – 10.78.12.12610.78.12.127
5110.78.12.128/2610.78.12.129 – 10.78.12.19010.78.12.191
5210.78.12.192/2610.78.12.193 – 10.78.12.25410.78.12.255
5310.78.13.0/2610.78.13.1 – 10.78.13.6210.78.13.63
5410.78.13.64/2610.78.13.65 – 10.78.13.12610.78.13.127
5510.78.13.128/2610.78.13.129 – 10.78.13.19010.78.13.191
5610.78.13.192/2610.78.13.193 – 10.78.13.25410.78.13.255
5710.78.14.0/2610.78.14.1 – 10.78.14.6210.78.14.63
5810.78.14.64/2610.78.14.65 – 10.78.14.12610.78.14.127
5910.78.14.128/2610.78.14.129 – 10.78.14.19010.78.14.191
6010.78.14.192/2610.78.14.193 – 10.78.14.25410.78.14.255
6110.78.15.0/2610.78.15.1 – 10.78.15.6210.78.15.63
6210.78.15.64/2610.78.15.65 – 10.78.15.12610.78.15.127
6310.78.15.128/2610.78.15.129 – 10.78.15.19010.78.15.191
6410.78.15.192/2610.78.15.193 – 10.78.15.25410.78.15.255
6510.78.16.0/2610.78.16.1 – 10.78.16.6210.78.16.63
6610.78.16.64/2610.78.16.65 – 10.78.16.12610.78.16.127
6710.78.16.128/2610.78.16.129 – 10.78.16.19010.78.16.191
6810.78.16.192/2610.78.16.193 – 10.78.16.25410.78.16.255
6910.78.17.0/2610.78.17.1 – 10.78.17.6210.78.17.63
7010.78.17.64/2610.78.17.65 – 10.78.17.12610.78.17.127
7110.78.17.128/2610.78.17.129 – 10.78.17.19010.78.17.191
7210.78.17.192/2610.78.17.193 – 10.78.17.25410.78.17.255
7310.78.18.0/2610.78.18.1 – 10.78.18.6210.78.18.63
7410.78.18.64/2610.78.18.65 – 10.78.18.12610.78.18.127
7510.78.18.128/2610.78.18.129 – 10.78.18.19010.78.18.191
7610.78.18.192/2610.78.18.193 – 10.78.18.25410.78.18.255
7710.78.19.0/2610.78.19.1 – 10.78.19.6210.78.19.63
7810.78.19.64/2610.78.19.65 – 10.78.19.12610.78.19.127
7910.78.19.128/2610.78.19.129 – 10.78.19.19010.78.19.191
8010.78.19.192/2610.78.19.193 – 10.78.19.25410.78.19.255
8110.78.20.0/2610.78.20.1 – 10.78.20.6210.78.20.63
8210.78.20.64/2610.78.20.65 – 10.78.20.12610.78.20.127
8310.78.20.128/2610.78.20.129 – 10.78.20.19010.78.20.191
8410.78.20.192/2610.78.20.193 – 10.78.20.25410.78.20.255
8510.78.21.0/2610.78.21.1 – 10.78.21.6210.78.21.63
8610.78.21.64/2610.78.21.65 – 10.78.21.12610.78.21.127
8710.78.21.128/2610.78.21.129 – 10.78.21.19010.78.21.191
8810.78.21.192/2610.78.21.193 – 10.78.21.25410.78.21.255
8910.78.22.0/2610.78.22.1 – 10.78.22.6210.78.22.63
9010.78.22.64/2610.78.22.65 – 10.78.22.12610.78.22.127
9110.78.22.128/2610.78.22.129 – 10.78.22.19010.78.22.191
9210.78.22.192/2610.78.22.193 – 10.78.22.25410.78.22.255
9310.78.23.0/2610.78.23.1 – 10.78.23.6210.78.23.63
9410.78.23.64/2610.78.23.65 – 10.78.23.12610.78.23.127
9510.78.23.128/2610.78.23.129 – 10.78.23.19010.78.23.191
9610.78.23.192/2610.78.23.193 – 10.78.23.25410.78.23.255
9710.78.24.0/2610.78.24.1 – 10.78.24.6210.78.24.63
9810.78.24.64/2610.78.24.65 – 10.78.24.12610.78.24.127
9910.78.24.128/2610.78.24.129 – 10.78.24.19010.78.24.191
10010.78.24.192/2610.78.24.193 – 10.78.24.25410.78.24.255
10110.78.25.0/2610.78.25.1 – 10.78.25.6210.78.25.63
10210.78.25.64/2610.78.25.65 – 10.78.25.12610.78.25.127
10310.78.25.128/2610.78.25.129 – 10.78.25.19010.78.25.191
10410.78.25.192/2610.78.25.193 – 10.78.25.25410.78.25.255
10510.78.26.0/2610.78.26.1 – 10.78.26.6210.78.26.63
10610.78.26.64/2610.78.26.65 – 10.78.26.12610.78.26.127
10710.78.26.128/2610.78.26.129 – 10.78.26.19010.78.26.191
10810.78.26.192/2610.78.26.193 – 10.78.26.25410.78.26.255
10910.78.27.0/2610.78.27.1 – 10.78.27.6210.78.27.63
11010.78.27.64/2610.78.27.65 – 10.78.27.12610.78.27.127
11110.78.27.128/2610.78.27.129 – 10.78.27.19010.78.27.191
11210.78.27.192/2610.78.27.193 – 10.78.27.25410.78.27.255
11310.78.28.0/2610.78.28.1 – 10.78.28.6210.78.28.63
11410.78.28.64/2610.78.28.65 – 10.78.28.12610.78.28.127
11510.78.28.128/2610.78.28.129 – 10.78.28.19010.78.28.191
11610.78.28.192/2610.78.28.193 – 10.78.28.25410.78.28.255
11710.78.29.0/2610.78.29.1 – 10.78.29.6210.78.29.63
11810.78.29.64/2610.78.29.65 – 10.78.29.12610.78.29.127
11910.78.29.128/2610.78.29.129 – 10.78.29.19010.78.29.191
12010.78.29.192/2610.78.29.193 – 10.78.29.25410.78.29.255
12110.78.30.0/2610.78.30.1 – 10.78.30.6210.78.30.63
12210.78.30.64/2610.78.30.65 – 10.78.30.12610.78.30.127
12310.78.30.128/2610.78.30.129 – 10.78.30.19010.78.30.191
12410.78.30.192/2610.78.30.193 – 10.78.30.25410.78.30.255
12510.78.31.0/2610.78.31.1 – 10.78.31.6210.78.31.63
12610.78.31.64/2610.78.31.65 – 10.78.31.12610.78.31.127
12710.78.31.128/2610.78.31.129 – 10.78.31.19010.78.31.191
12810.78.31.192/2610.78.31.193 – 10.78.31.25410.78.31.255
12910.78.32.0/2610.78.32.1 – 10.78.32.6210.78.32.63
13010.78.32.64/2610.78.32.65 – 10.78.32.12610.78.32.127
13110.78.32.128/2610.78.32.129 – 10.78.32.19010.78.32.191
13210.78.32.192/2610.78.32.193 – 10.78.32.25410.78.32.255
13310.78.33.0/2610.78.33.1 – 10.78.33.6210.78.33.63
13410.78.33.64/2610.78.33.65 – 10.78.33.12610.78.33.127
13510.78.33.128/2610.78.33.129 – 10.78.33.19010.78.33.191
13610.78.33.192/2610.78.33.193 – 10.78.33.25410.78.33.255
13710.78.34.0/2610.78.34.1 – 10.78.34.6210.78.34.63
13810.78.34.64/2610.78.34.65 – 10.78.34.12610.78.34.127
13910.78.34.128/2610.78.34.129 – 10.78.34.19010.78.34.191
14010.78.34.192/2610.78.34.193 – 10.78.34.25410.78.34.255
14110.78.35.0/2610.78.35.1 – 10.78.35.6210.78.35.63
14210.78.35.64/2610.78.35.65 – 10.78.35.12610.78.35.127
14310.78.35.128/2610.78.35.129 – 10.78.35.19010.78.35.191
14410.78.35.192/2610.78.35.193 – 10.78.35.25410.78.35.255
14510.78.36.0/2610.78.36.1 – 10.78.36.6210.78.36.63
14610.78.36.64/2610.78.36.65 – 10.78.36.12610.78.36.127
14710.78.36.128/2610.78.36.129 – 10.78.36.19010.78.36.191
14810.78.36.192/2610.78.36.193 – 10.78.36.25410.78.36.255
14910.78.37.0/2610.78.37.1 – 10.78.37.6210.78.37.63
15010.78.37.64/2610.78.37.65 – 10.78.37.12610.78.37.127
15110.78.37.128/2610.78.37.129 – 10.78.37.19010.78.37.191
15210.78.37.192/2610.78.37.193 – 10.78.37.25410.78.37.255
15310.78.38.0/2610.78.38.1 – 10.78.38.6210.78.38.63
15410.78.38.64/2610.78.38.65 – 10.78.38.12610.78.38.127
15510.78.38.128/2610.78.38.129 – 10.78.38.19010.78.38.191
15610.78.38.192/2610.78.38.193 – 10.78.38.25410.78.38.255
15710.78.39.0/2610.78.39.1 – 10.78.39.6210.78.39.63
15810.78.39.64/2610.78.39.65 – 10.78.39.12610.78.39.127
15910.78.39.128/2610.78.39.129 – 10.78.39.19010.78.39.191
16010.78.39.192/2610.78.39.193 – 10.78.39.25410.78.39.255
16110.78.40.0/2610.78.40.1 – 10.78.40.6210.78.40.63
16210.78.40.64/2610.78.40.65 – 10.78.40.12610.78.40.127
16310.78.40.128/2610.78.40.129 – 10.78.40.19010.78.40.191
16410.78.40.192/2610.78.40.193 – 10.78.40.25410.78.40.255
16510.78.41.0/2610.78.41.1 – 10.78.41.6210.78.41.63
16610.78.41.64/2610.78.41.65 – 10.78.41.12610.78.41.127
16710.78.41.128/2610.78.41.129 – 10.78.41.19010.78.41.191
16810.78.41.192/2610.78.41.193 – 10.78.41.25410.78.41.255
16910.78.42.0/2610.78.42.1 – 10.78.42.6210.78.42.63
17010.78.42.64/2610.78.42.65 – 10.78.42.12610.78.42.127
17110.78.42.128/2610.78.42.129 – 10.78.42.19010.78.42.191
17210.78.42.192/2610.78.42.193 – 10.78.42.25410.78.42.255
17310.78.43.0/2610.78.43.1 – 10.78.43.6210.78.43.63
17410.78.43.64/2610.78.43.65 – 10.78.43.12610.78.43.127
17510.78.43.128/2610.78.43.129 – 10.78.43.19010.78.43.191
17610.78.43.192/2610.78.43.193 – 10.78.43.25410.78.43.255
17710.78.44.0/2610.78.44.1 – 10.78.44.6210.78.44.63
17810.78.44.64/2610.78.44.65 – 10.78.44.12610.78.44.127
17910.78.44.128/2610.78.44.129 – 10.78.44.19010.78.44.191
18010.78.44.192/2610.78.44.193 – 10.78.44.25410.78.44.255
18110.78.45.0/2610.78.45.1 – 10.78.45.6210.78.45.63
18210.78.45.64/2610.78.45.65 – 10.78.45.12610.78.45.127
18310.78.45.128/2610.78.45.129 – 10.78.45.19010.78.45.191
18410.78.45.192/2610.78.45.193 – 10.78.45.25410.78.45.255
18510.78.46.0/2610.78.46.1 – 10.78.46.6210.78.46.63
18610.78.46.64/2610.78.46.65 – 10.78.46.12610.78.46.127
18710.78.46.128/2610.78.46.129 – 10.78.46.19010.78.46.191
18810.78.46.192/2610.78.46.193 – 10.78.46.25410.78.46.255
18910.78.47.0/2610.78.47.1 – 10.78.47.6210.78.47.63
19010.78.47.64/2610.78.47.65 – 10.78.47.12610.78.47.127
19110.78.47.128/2610.78.47.129 – 10.78.47.19010.78.47.191
19210.78.47.192/2610.78.47.193 – 10.78.47.25410.78.47.255
19310.78.48.0/2610.78.48.1 – 10.78.48.6210.78.48.63
19410.78.48.64/2610.78.48.65 – 10.78.48.12610.78.48.127
19510.78.48.128/2610.78.48.129 – 10.78.48.19010.78.48.191
19610.78.48.192/2610.78.48.193 – 10.78.48.25410.78.48.255
19710.78.49.0/2610.78.49.1 – 10.78.49.6210.78.49.63
19810.78.49.64/2610.78.49.65 – 10.78.49.12610.78.49.127
19910.78.49.128/2610.78.49.129 – 10.78.49.19010.78.49.191
20010.78.49.192/2610.78.49.193 – 10.78.49.25410.78.49.255
20110.78.50.0/2610.78.50.1 – 10.78.50.6210.78.50.63
20210.78.50.64/2610.78.50.65 – 10.78.50.12610.78.50.127
20310.78.50.128/2610.78.50.129 – 10.78.50.19010.78.50.191
20410.78.50.192/2610.78.50.193 – 10.78.50.25410.78.50.255
20510.78.51.0/2610.78.51.1 – 10.78.51.6210.78.51.63
20610.78.51.64/2610.78.51.65 – 10.78.51.12610.78.51.127
20710.78.51.128/2610.78.51.129 – 10.78.51.19010.78.51.191
20810.78.51.192/2610.78.51.193 – 10.78.51.25410.78.51.255
20910.78.52.0/2610.78.52.1 – 10.78.52.6210.78.52.63
21010.78.52.64/2610.78.52.65 – 10.78.52.12610.78.52.127
21110.78.52.128/2610.78.52.129 – 10.78.52.19010.78.52.191
21210.78.52.192/2610.78.52.193 – 10.78.52.25410.78.52.255
21310.78.53.0/2610.78.53.1 – 10.78.53.6210.78.53.63
21410.78.53.64/2610.78.53.65 – 10.78.53.12610.78.53.127
21510.78.53.128/2610.78.53.129 – 10.78.53.19010.78.53.191
21610.78.53.192/2610.78.53.193 – 10.78.53.25410.78.53.255
21710.78.54.0/2610.78.54.1 – 10.78.54.6210.78.54.63
21810.78.54.64/2610.78.54.65 – 10.78.54.12610.78.54.127
21910.78.54.128/2610.78.54.129 – 10.78.54.19010.78.54.191
22010.78.54.192/2610.78.54.193 – 10.78.54.25410.78.54.255
22110.78.55.0/2610.78.55.1 – 10.78.55.6210.78.55.63
22210.78.55.64/2610.78.55.65 – 10.78.55.12610.78.55.127
22310.78.55.128/2610.78.55.129 – 10.78.55.19010.78.55.191
22410.78.55.192/2610.78.55.193 – 10.78.55.25410.78.55.255
22510.78.56.0/2610.78.56.1 – 10.78.56.6210.78.56.63
22610.78.56.64/2610.78.56.65 – 10.78.56.12610.78.56.127
22710.78.56.128/2610.78.56.129 – 10.78.56.19010.78.56.191
22810.78.56.192/2610.78.56.193 – 10.78.56.25410.78.56.255
22910.78.57.0/2610.78.57.1 – 10.78.57.6210.78.57.63
23010.78.57.64/2610.78.57.65 – 10.78.57.12610.78.57.127
23110.78.57.128/2610.78.57.129 – 10.78.57.19010.78.57.191
23210.78.57.192/2610.78.57.193 – 10.78.57.25410.78.57.255
23310.78.58.0/2610.78.58.1 – 10.78.58.6210.78.58.63
23410.78.58.64/2610.78.58.65 – 10.78.58.12610.78.58.127
23510.78.58.128/2610.78.58.129 – 10.78.58.19010.78.58.191
23610.78.58.192/2610.78.58.193 – 10.78.58.25410.78.58.255
23710.78.59.0/2610.78.59.1 – 10.78.59.6210.78.59.63
23810.78.59.64/2610.78.59.65 – 10.78.59.12610.78.59.127
23910.78.59.128/2610.78.59.129 – 10.78.59.19010.78.59.191
24010.78.59.192/2610.78.59.193 – 10.78.59.25410.78.59.255
24110.78.60.0/2610.78.60.1 – 10.78.60.6210.78.60.63
24210.78.60.64/2610.78.60.65 – 10.78.60.12610.78.60.127
24310.78.60.128/2610.78.60.129 – 10.78.60.19010.78.60.191
24410.78.60.192/2610.78.60.193 – 10.78.60.25410.78.60.255
24510.78.61.0/2610.78.61.1 – 10.78.61.6210.78.61.63
24610.78.61.64/2610.78.61.65 – 10.78.61.12610.78.61.127
24710.78.61.128/2610.78.61.129 – 10.78.61.19010.78.61.191
24810.78.61.192/2610.78.61.193 – 10.78.61.25410.78.61.255
24910.78.62.0/2610.78.62.1 – 10.78.62.6210.78.62.63
25010.78.62.64/2610.78.62.65 – 10.78.62.12610.78.62.127
25110.78.62.128/2610.78.62.129 – 10.78.62.19010.78.62.191
25210.78.62.192/2610.78.62.193 – 10.78.62.25410.78.62.255
25310.78.63.0/2610.78.63.1 – 10.78.63.6210.78.63.63
25410.78.63.64/2610.78.63.65 – 10.78.63.12610.78.63.127
25510.78.63.128/2610.78.63.129 – 10.78.63.19010.78.63.191
25610.78.63.192/2610.78.63.193 – 10.78.63.25410.78.63.255

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 /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 →