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)10.40.0.0/13
network10.40.0.0/13
broadcast10.47.255.255
first host10.40.0.1
last host10.47.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.40.0.0/13
address00001010.00101000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00101000.00000000.00000000
broadcast00001010.00101111.11111111.11111111
green = network part, grey = host part
hex0x0a280000
decimal170393600
reverse dns0.0.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:0

/13 split into /26 · 8,192 subnets

close ×
#networkhost rangebroadcast
110.40.0.0/2610.40.0.1 – 10.40.0.6210.40.0.63
210.40.0.64/2610.40.0.65 – 10.40.0.12610.40.0.127
310.40.0.128/2610.40.0.129 – 10.40.0.19010.40.0.191
410.40.0.192/2610.40.0.193 – 10.40.0.25410.40.0.255
510.40.1.0/2610.40.1.1 – 10.40.1.6210.40.1.63
610.40.1.64/2610.40.1.65 – 10.40.1.12610.40.1.127
710.40.1.128/2610.40.1.129 – 10.40.1.19010.40.1.191
810.40.1.192/2610.40.1.193 – 10.40.1.25410.40.1.255
910.40.2.0/2610.40.2.1 – 10.40.2.6210.40.2.63
1010.40.2.64/2610.40.2.65 – 10.40.2.12610.40.2.127
1110.40.2.128/2610.40.2.129 – 10.40.2.19010.40.2.191
1210.40.2.192/2610.40.2.193 – 10.40.2.25410.40.2.255
1310.40.3.0/2610.40.3.1 – 10.40.3.6210.40.3.63
1410.40.3.64/2610.40.3.65 – 10.40.3.12610.40.3.127
1510.40.3.128/2610.40.3.129 – 10.40.3.19010.40.3.191
1610.40.3.192/2610.40.3.193 – 10.40.3.25410.40.3.255
1710.40.4.0/2610.40.4.1 – 10.40.4.6210.40.4.63
1810.40.4.64/2610.40.4.65 – 10.40.4.12610.40.4.127
1910.40.4.128/2610.40.4.129 – 10.40.4.19010.40.4.191
2010.40.4.192/2610.40.4.193 – 10.40.4.25410.40.4.255
2110.40.5.0/2610.40.5.1 – 10.40.5.6210.40.5.63
2210.40.5.64/2610.40.5.65 – 10.40.5.12610.40.5.127
2310.40.5.128/2610.40.5.129 – 10.40.5.19010.40.5.191
2410.40.5.192/2610.40.5.193 – 10.40.5.25410.40.5.255
2510.40.6.0/2610.40.6.1 – 10.40.6.6210.40.6.63
2610.40.6.64/2610.40.6.65 – 10.40.6.12610.40.6.127
2710.40.6.128/2610.40.6.129 – 10.40.6.19010.40.6.191
2810.40.6.192/2610.40.6.193 – 10.40.6.25410.40.6.255
2910.40.7.0/2610.40.7.1 – 10.40.7.6210.40.7.63
3010.40.7.64/2610.40.7.65 – 10.40.7.12610.40.7.127
3110.40.7.128/2610.40.7.129 – 10.40.7.19010.40.7.191
3210.40.7.192/2610.40.7.193 – 10.40.7.25410.40.7.255
3310.40.8.0/2610.40.8.1 – 10.40.8.6210.40.8.63
3410.40.8.64/2610.40.8.65 – 10.40.8.12610.40.8.127
3510.40.8.128/2610.40.8.129 – 10.40.8.19010.40.8.191
3610.40.8.192/2610.40.8.193 – 10.40.8.25410.40.8.255
3710.40.9.0/2610.40.9.1 – 10.40.9.6210.40.9.63
3810.40.9.64/2610.40.9.65 – 10.40.9.12610.40.9.127
3910.40.9.128/2610.40.9.129 – 10.40.9.19010.40.9.191
4010.40.9.192/2610.40.9.193 – 10.40.9.25410.40.9.255
4110.40.10.0/2610.40.10.1 – 10.40.10.6210.40.10.63
4210.40.10.64/2610.40.10.65 – 10.40.10.12610.40.10.127
4310.40.10.128/2610.40.10.129 – 10.40.10.19010.40.10.191
4410.40.10.192/2610.40.10.193 – 10.40.10.25410.40.10.255
4510.40.11.0/2610.40.11.1 – 10.40.11.6210.40.11.63
4610.40.11.64/2610.40.11.65 – 10.40.11.12610.40.11.127
4710.40.11.128/2610.40.11.129 – 10.40.11.19010.40.11.191
4810.40.11.192/2610.40.11.193 – 10.40.11.25410.40.11.255
4910.40.12.0/2610.40.12.1 – 10.40.12.6210.40.12.63
5010.40.12.64/2610.40.12.65 – 10.40.12.12610.40.12.127
5110.40.12.128/2610.40.12.129 – 10.40.12.19010.40.12.191
5210.40.12.192/2610.40.12.193 – 10.40.12.25410.40.12.255
5310.40.13.0/2610.40.13.1 – 10.40.13.6210.40.13.63
5410.40.13.64/2610.40.13.65 – 10.40.13.12610.40.13.127
5510.40.13.128/2610.40.13.129 – 10.40.13.19010.40.13.191
5610.40.13.192/2610.40.13.193 – 10.40.13.25410.40.13.255
5710.40.14.0/2610.40.14.1 – 10.40.14.6210.40.14.63
5810.40.14.64/2610.40.14.65 – 10.40.14.12610.40.14.127
5910.40.14.128/2610.40.14.129 – 10.40.14.19010.40.14.191
6010.40.14.192/2610.40.14.193 – 10.40.14.25410.40.14.255
6110.40.15.0/2610.40.15.1 – 10.40.15.6210.40.15.63
6210.40.15.64/2610.40.15.65 – 10.40.15.12610.40.15.127
6310.40.15.128/2610.40.15.129 – 10.40.15.19010.40.15.191
6410.40.15.192/2610.40.15.193 – 10.40.15.25410.40.15.255
6510.40.16.0/2610.40.16.1 – 10.40.16.6210.40.16.63
6610.40.16.64/2610.40.16.65 – 10.40.16.12610.40.16.127
6710.40.16.128/2610.40.16.129 – 10.40.16.19010.40.16.191
6810.40.16.192/2610.40.16.193 – 10.40.16.25410.40.16.255
6910.40.17.0/2610.40.17.1 – 10.40.17.6210.40.17.63
7010.40.17.64/2610.40.17.65 – 10.40.17.12610.40.17.127
7110.40.17.128/2610.40.17.129 – 10.40.17.19010.40.17.191
7210.40.17.192/2610.40.17.193 – 10.40.17.25410.40.17.255
7310.40.18.0/2610.40.18.1 – 10.40.18.6210.40.18.63
7410.40.18.64/2610.40.18.65 – 10.40.18.12610.40.18.127
7510.40.18.128/2610.40.18.129 – 10.40.18.19010.40.18.191
7610.40.18.192/2610.40.18.193 – 10.40.18.25410.40.18.255
7710.40.19.0/2610.40.19.1 – 10.40.19.6210.40.19.63
7810.40.19.64/2610.40.19.65 – 10.40.19.12610.40.19.127
7910.40.19.128/2610.40.19.129 – 10.40.19.19010.40.19.191
8010.40.19.192/2610.40.19.193 – 10.40.19.25410.40.19.255
8110.40.20.0/2610.40.20.1 – 10.40.20.6210.40.20.63
8210.40.20.64/2610.40.20.65 – 10.40.20.12610.40.20.127
8310.40.20.128/2610.40.20.129 – 10.40.20.19010.40.20.191
8410.40.20.192/2610.40.20.193 – 10.40.20.25410.40.20.255
8510.40.21.0/2610.40.21.1 – 10.40.21.6210.40.21.63
8610.40.21.64/2610.40.21.65 – 10.40.21.12610.40.21.127
8710.40.21.128/2610.40.21.129 – 10.40.21.19010.40.21.191
8810.40.21.192/2610.40.21.193 – 10.40.21.25410.40.21.255
8910.40.22.0/2610.40.22.1 – 10.40.22.6210.40.22.63
9010.40.22.64/2610.40.22.65 – 10.40.22.12610.40.22.127
9110.40.22.128/2610.40.22.129 – 10.40.22.19010.40.22.191
9210.40.22.192/2610.40.22.193 – 10.40.22.25410.40.22.255
9310.40.23.0/2610.40.23.1 – 10.40.23.6210.40.23.63
9410.40.23.64/2610.40.23.65 – 10.40.23.12610.40.23.127
9510.40.23.128/2610.40.23.129 – 10.40.23.19010.40.23.191
9610.40.23.192/2610.40.23.193 – 10.40.23.25410.40.23.255
9710.40.24.0/2610.40.24.1 – 10.40.24.6210.40.24.63
9810.40.24.64/2610.40.24.65 – 10.40.24.12610.40.24.127
9910.40.24.128/2610.40.24.129 – 10.40.24.19010.40.24.191
10010.40.24.192/2610.40.24.193 – 10.40.24.25410.40.24.255
10110.40.25.0/2610.40.25.1 – 10.40.25.6210.40.25.63
10210.40.25.64/2610.40.25.65 – 10.40.25.12610.40.25.127
10310.40.25.128/2610.40.25.129 – 10.40.25.19010.40.25.191
10410.40.25.192/2610.40.25.193 – 10.40.25.25410.40.25.255
10510.40.26.0/2610.40.26.1 – 10.40.26.6210.40.26.63
10610.40.26.64/2610.40.26.65 – 10.40.26.12610.40.26.127
10710.40.26.128/2610.40.26.129 – 10.40.26.19010.40.26.191
10810.40.26.192/2610.40.26.193 – 10.40.26.25410.40.26.255
10910.40.27.0/2610.40.27.1 – 10.40.27.6210.40.27.63
11010.40.27.64/2610.40.27.65 – 10.40.27.12610.40.27.127
11110.40.27.128/2610.40.27.129 – 10.40.27.19010.40.27.191
11210.40.27.192/2610.40.27.193 – 10.40.27.25410.40.27.255
11310.40.28.0/2610.40.28.1 – 10.40.28.6210.40.28.63
11410.40.28.64/2610.40.28.65 – 10.40.28.12610.40.28.127
11510.40.28.128/2610.40.28.129 – 10.40.28.19010.40.28.191
11610.40.28.192/2610.40.28.193 – 10.40.28.25410.40.28.255
11710.40.29.0/2610.40.29.1 – 10.40.29.6210.40.29.63
11810.40.29.64/2610.40.29.65 – 10.40.29.12610.40.29.127
11910.40.29.128/2610.40.29.129 – 10.40.29.19010.40.29.191
12010.40.29.192/2610.40.29.193 – 10.40.29.25410.40.29.255
12110.40.30.0/2610.40.30.1 – 10.40.30.6210.40.30.63
12210.40.30.64/2610.40.30.65 – 10.40.30.12610.40.30.127
12310.40.30.128/2610.40.30.129 – 10.40.30.19010.40.30.191
12410.40.30.192/2610.40.30.193 – 10.40.30.25410.40.30.255
12510.40.31.0/2610.40.31.1 – 10.40.31.6210.40.31.63
12610.40.31.64/2610.40.31.65 – 10.40.31.12610.40.31.127
12710.40.31.128/2610.40.31.129 – 10.40.31.19010.40.31.191
12810.40.31.192/2610.40.31.193 – 10.40.31.25410.40.31.255
12910.40.32.0/2610.40.32.1 – 10.40.32.6210.40.32.63
13010.40.32.64/2610.40.32.65 – 10.40.32.12610.40.32.127
13110.40.32.128/2610.40.32.129 – 10.40.32.19010.40.32.191
13210.40.32.192/2610.40.32.193 – 10.40.32.25410.40.32.255
13310.40.33.0/2610.40.33.1 – 10.40.33.6210.40.33.63
13410.40.33.64/2610.40.33.65 – 10.40.33.12610.40.33.127
13510.40.33.128/2610.40.33.129 – 10.40.33.19010.40.33.191
13610.40.33.192/2610.40.33.193 – 10.40.33.25410.40.33.255
13710.40.34.0/2610.40.34.1 – 10.40.34.6210.40.34.63
13810.40.34.64/2610.40.34.65 – 10.40.34.12610.40.34.127
13910.40.34.128/2610.40.34.129 – 10.40.34.19010.40.34.191
14010.40.34.192/2610.40.34.193 – 10.40.34.25410.40.34.255
14110.40.35.0/2610.40.35.1 – 10.40.35.6210.40.35.63
14210.40.35.64/2610.40.35.65 – 10.40.35.12610.40.35.127
14310.40.35.128/2610.40.35.129 – 10.40.35.19010.40.35.191
14410.40.35.192/2610.40.35.193 – 10.40.35.25410.40.35.255
14510.40.36.0/2610.40.36.1 – 10.40.36.6210.40.36.63
14610.40.36.64/2610.40.36.65 – 10.40.36.12610.40.36.127
14710.40.36.128/2610.40.36.129 – 10.40.36.19010.40.36.191
14810.40.36.192/2610.40.36.193 – 10.40.36.25410.40.36.255
14910.40.37.0/2610.40.37.1 – 10.40.37.6210.40.37.63
15010.40.37.64/2610.40.37.65 – 10.40.37.12610.40.37.127
15110.40.37.128/2610.40.37.129 – 10.40.37.19010.40.37.191
15210.40.37.192/2610.40.37.193 – 10.40.37.25410.40.37.255
15310.40.38.0/2610.40.38.1 – 10.40.38.6210.40.38.63
15410.40.38.64/2610.40.38.65 – 10.40.38.12610.40.38.127
15510.40.38.128/2610.40.38.129 – 10.40.38.19010.40.38.191
15610.40.38.192/2610.40.38.193 – 10.40.38.25410.40.38.255
15710.40.39.0/2610.40.39.1 – 10.40.39.6210.40.39.63
15810.40.39.64/2610.40.39.65 – 10.40.39.12610.40.39.127
15910.40.39.128/2610.40.39.129 – 10.40.39.19010.40.39.191
16010.40.39.192/2610.40.39.193 – 10.40.39.25410.40.39.255
16110.40.40.0/2610.40.40.1 – 10.40.40.6210.40.40.63
16210.40.40.64/2610.40.40.65 – 10.40.40.12610.40.40.127
16310.40.40.128/2610.40.40.129 – 10.40.40.19010.40.40.191
16410.40.40.192/2610.40.40.193 – 10.40.40.25410.40.40.255
16510.40.41.0/2610.40.41.1 – 10.40.41.6210.40.41.63
16610.40.41.64/2610.40.41.65 – 10.40.41.12610.40.41.127
16710.40.41.128/2610.40.41.129 – 10.40.41.19010.40.41.191
16810.40.41.192/2610.40.41.193 – 10.40.41.25410.40.41.255
16910.40.42.0/2610.40.42.1 – 10.40.42.6210.40.42.63
17010.40.42.64/2610.40.42.65 – 10.40.42.12610.40.42.127
17110.40.42.128/2610.40.42.129 – 10.40.42.19010.40.42.191
17210.40.42.192/2610.40.42.193 – 10.40.42.25410.40.42.255
17310.40.43.0/2610.40.43.1 – 10.40.43.6210.40.43.63
17410.40.43.64/2610.40.43.65 – 10.40.43.12610.40.43.127
17510.40.43.128/2610.40.43.129 – 10.40.43.19010.40.43.191
17610.40.43.192/2610.40.43.193 – 10.40.43.25410.40.43.255
17710.40.44.0/2610.40.44.1 – 10.40.44.6210.40.44.63
17810.40.44.64/2610.40.44.65 – 10.40.44.12610.40.44.127
17910.40.44.128/2610.40.44.129 – 10.40.44.19010.40.44.191
18010.40.44.192/2610.40.44.193 – 10.40.44.25410.40.44.255
18110.40.45.0/2610.40.45.1 – 10.40.45.6210.40.45.63
18210.40.45.64/2610.40.45.65 – 10.40.45.12610.40.45.127
18310.40.45.128/2610.40.45.129 – 10.40.45.19010.40.45.191
18410.40.45.192/2610.40.45.193 – 10.40.45.25410.40.45.255
18510.40.46.0/2610.40.46.1 – 10.40.46.6210.40.46.63
18610.40.46.64/2610.40.46.65 – 10.40.46.12610.40.46.127
18710.40.46.128/2610.40.46.129 – 10.40.46.19010.40.46.191
18810.40.46.192/2610.40.46.193 – 10.40.46.25410.40.46.255
18910.40.47.0/2610.40.47.1 – 10.40.47.6210.40.47.63
19010.40.47.64/2610.40.47.65 – 10.40.47.12610.40.47.127
19110.40.47.128/2610.40.47.129 – 10.40.47.19010.40.47.191
19210.40.47.192/2610.40.47.193 – 10.40.47.25410.40.47.255
19310.40.48.0/2610.40.48.1 – 10.40.48.6210.40.48.63
19410.40.48.64/2610.40.48.65 – 10.40.48.12610.40.48.127
19510.40.48.128/2610.40.48.129 – 10.40.48.19010.40.48.191
19610.40.48.192/2610.40.48.193 – 10.40.48.25410.40.48.255
19710.40.49.0/2610.40.49.1 – 10.40.49.6210.40.49.63
19810.40.49.64/2610.40.49.65 – 10.40.49.12610.40.49.127
19910.40.49.128/2610.40.49.129 – 10.40.49.19010.40.49.191
20010.40.49.192/2610.40.49.193 – 10.40.49.25410.40.49.255
20110.40.50.0/2610.40.50.1 – 10.40.50.6210.40.50.63
20210.40.50.64/2610.40.50.65 – 10.40.50.12610.40.50.127
20310.40.50.128/2610.40.50.129 – 10.40.50.19010.40.50.191
20410.40.50.192/2610.40.50.193 – 10.40.50.25410.40.50.255
20510.40.51.0/2610.40.51.1 – 10.40.51.6210.40.51.63
20610.40.51.64/2610.40.51.65 – 10.40.51.12610.40.51.127
20710.40.51.128/2610.40.51.129 – 10.40.51.19010.40.51.191
20810.40.51.192/2610.40.51.193 – 10.40.51.25410.40.51.255
20910.40.52.0/2610.40.52.1 – 10.40.52.6210.40.52.63
21010.40.52.64/2610.40.52.65 – 10.40.52.12610.40.52.127
21110.40.52.128/2610.40.52.129 – 10.40.52.19010.40.52.191
21210.40.52.192/2610.40.52.193 – 10.40.52.25410.40.52.255
21310.40.53.0/2610.40.53.1 – 10.40.53.6210.40.53.63
21410.40.53.64/2610.40.53.65 – 10.40.53.12610.40.53.127
21510.40.53.128/2610.40.53.129 – 10.40.53.19010.40.53.191
21610.40.53.192/2610.40.53.193 – 10.40.53.25410.40.53.255
21710.40.54.0/2610.40.54.1 – 10.40.54.6210.40.54.63
21810.40.54.64/2610.40.54.65 – 10.40.54.12610.40.54.127
21910.40.54.128/2610.40.54.129 – 10.40.54.19010.40.54.191
22010.40.54.192/2610.40.54.193 – 10.40.54.25410.40.54.255
22110.40.55.0/2610.40.55.1 – 10.40.55.6210.40.55.63
22210.40.55.64/2610.40.55.65 – 10.40.55.12610.40.55.127
22310.40.55.128/2610.40.55.129 – 10.40.55.19010.40.55.191
22410.40.55.192/2610.40.55.193 – 10.40.55.25410.40.55.255
22510.40.56.0/2610.40.56.1 – 10.40.56.6210.40.56.63
22610.40.56.64/2610.40.56.65 – 10.40.56.12610.40.56.127
22710.40.56.128/2610.40.56.129 – 10.40.56.19010.40.56.191
22810.40.56.192/2610.40.56.193 – 10.40.56.25410.40.56.255
22910.40.57.0/2610.40.57.1 – 10.40.57.6210.40.57.63
23010.40.57.64/2610.40.57.65 – 10.40.57.12610.40.57.127
23110.40.57.128/2610.40.57.129 – 10.40.57.19010.40.57.191
23210.40.57.192/2610.40.57.193 – 10.40.57.25410.40.57.255
23310.40.58.0/2610.40.58.1 – 10.40.58.6210.40.58.63
23410.40.58.64/2610.40.58.65 – 10.40.58.12610.40.58.127
23510.40.58.128/2610.40.58.129 – 10.40.58.19010.40.58.191
23610.40.58.192/2610.40.58.193 – 10.40.58.25410.40.58.255
23710.40.59.0/2610.40.59.1 – 10.40.59.6210.40.59.63
23810.40.59.64/2610.40.59.65 – 10.40.59.12610.40.59.127
23910.40.59.128/2610.40.59.129 – 10.40.59.19010.40.59.191
24010.40.59.192/2610.40.59.193 – 10.40.59.25410.40.59.255
24110.40.60.0/2610.40.60.1 – 10.40.60.6210.40.60.63
24210.40.60.64/2610.40.60.65 – 10.40.60.12610.40.60.127
24310.40.60.128/2610.40.60.129 – 10.40.60.19010.40.60.191
24410.40.60.192/2610.40.60.193 – 10.40.60.25410.40.60.255
24510.40.61.0/2610.40.61.1 – 10.40.61.6210.40.61.63
24610.40.61.64/2610.40.61.65 – 10.40.61.12610.40.61.127
24710.40.61.128/2610.40.61.129 – 10.40.61.19010.40.61.191
24810.40.61.192/2610.40.61.193 – 10.40.61.25410.40.61.255
24910.40.62.0/2610.40.62.1 – 10.40.62.6210.40.62.63
25010.40.62.64/2610.40.62.65 – 10.40.62.12610.40.62.127
25110.40.62.128/2610.40.62.129 – 10.40.62.19010.40.62.191
25210.40.62.192/2610.40.62.193 – 10.40.62.25410.40.62.255
25310.40.63.0/2610.40.63.1 – 10.40.63.6210.40.63.63
25410.40.63.64/2610.40.63.65 – 10.40.63.12610.40.63.127
25510.40.63.128/2610.40.63.129 – 10.40.63.19010.40.63.191
25610.40.63.192/2610.40.63.193 – 10.40.63.25410.40.63.255

showing 256 of 8,192

01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /13
/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-
/13255.248.0.0524,288524,2861
/14255.252.0.0262,144262,1422 split →
/15255.254.0.0131,072131,0704 split →
/16255.255.0.065,53665,5348 split →
/17255.255.128.032,76832,76616 split →
/18255.255.192.016,38416,38232 split →
/19255.255.224.08,1928,19064 split →
/20255.255.240.04,0964,094128 split →
/21255.255.248.02,0482,046256 split →
/22255.255.252.01,0241,022512 split →
/23255.255.254.05125101,024 split →
/24255.255.255.02562542,048 split →
/25255.255.255.1281281264,096 split →
/26255.255.255.19264628,192 split →
/27255.255.255.224323016,384 split →
/28255.255.255.240161432,768 split →
/29255.255.255.2488665,536 split →
/30255.255.255.25242131,072 split →
/31255.255.255.25422262,144 split →
/32255.255.255.25511524,288 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 →