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
private IP (RFC 1918)10.128.0.0/9
network10.128.0.0/9
broadcast10.255.255.255
first host10.128.0.1
last host10.255.255.254
subnet mask255.128.0.0
wildcard0.127.255.255
addresses8,388,608
usable hosts8,388,606
classA
ipcalc 10.128.0.0/9
address00001010.10000000.00000000.00000000
subnet mask11111111.10000000.00000000.00000000
network00001010.10000000.00000000.00000000
broadcast00001010.11111111.11111111.11111111
green = network part, grey = host part
hex0x0a800000
decimal176160768
reverse dns0.0.128.10.in-addr.arpa
ipv4-mapped::ffff:a80:0

/9 split into /27 · 262,144 subnets

close ×
#networkhost rangebroadcast
110.128.0.0/2710.128.0.1 – 10.128.0.3010.128.0.31
210.128.0.32/2710.128.0.33 – 10.128.0.6210.128.0.63
310.128.0.64/2710.128.0.65 – 10.128.0.9410.128.0.95
410.128.0.96/2710.128.0.97 – 10.128.0.12610.128.0.127
510.128.0.128/2710.128.0.129 – 10.128.0.15810.128.0.159
610.128.0.160/2710.128.0.161 – 10.128.0.19010.128.0.191
710.128.0.192/2710.128.0.193 – 10.128.0.22210.128.0.223
810.128.0.224/2710.128.0.225 – 10.128.0.25410.128.0.255
910.128.1.0/2710.128.1.1 – 10.128.1.3010.128.1.31
1010.128.1.32/2710.128.1.33 – 10.128.1.6210.128.1.63
1110.128.1.64/2710.128.1.65 – 10.128.1.9410.128.1.95
1210.128.1.96/2710.128.1.97 – 10.128.1.12610.128.1.127
1310.128.1.128/2710.128.1.129 – 10.128.1.15810.128.1.159
1410.128.1.160/2710.128.1.161 – 10.128.1.19010.128.1.191
1510.128.1.192/2710.128.1.193 – 10.128.1.22210.128.1.223
1610.128.1.224/2710.128.1.225 – 10.128.1.25410.128.1.255
1710.128.2.0/2710.128.2.1 – 10.128.2.3010.128.2.31
1810.128.2.32/2710.128.2.33 – 10.128.2.6210.128.2.63
1910.128.2.64/2710.128.2.65 – 10.128.2.9410.128.2.95
2010.128.2.96/2710.128.2.97 – 10.128.2.12610.128.2.127
2110.128.2.128/2710.128.2.129 – 10.128.2.15810.128.2.159
2210.128.2.160/2710.128.2.161 – 10.128.2.19010.128.2.191
2310.128.2.192/2710.128.2.193 – 10.128.2.22210.128.2.223
2410.128.2.224/2710.128.2.225 – 10.128.2.25410.128.2.255
2510.128.3.0/2710.128.3.1 – 10.128.3.3010.128.3.31
2610.128.3.32/2710.128.3.33 – 10.128.3.6210.128.3.63
2710.128.3.64/2710.128.3.65 – 10.128.3.9410.128.3.95
2810.128.3.96/2710.128.3.97 – 10.128.3.12610.128.3.127
2910.128.3.128/2710.128.3.129 – 10.128.3.15810.128.3.159
3010.128.3.160/2710.128.3.161 – 10.128.3.19010.128.3.191
3110.128.3.192/2710.128.3.193 – 10.128.3.22210.128.3.223
3210.128.3.224/2710.128.3.225 – 10.128.3.25410.128.3.255
3310.128.4.0/2710.128.4.1 – 10.128.4.3010.128.4.31
3410.128.4.32/2710.128.4.33 – 10.128.4.6210.128.4.63
3510.128.4.64/2710.128.4.65 – 10.128.4.9410.128.4.95
3610.128.4.96/2710.128.4.97 – 10.128.4.12610.128.4.127
3710.128.4.128/2710.128.4.129 – 10.128.4.15810.128.4.159
3810.128.4.160/2710.128.4.161 – 10.128.4.19010.128.4.191
3910.128.4.192/2710.128.4.193 – 10.128.4.22210.128.4.223
4010.128.4.224/2710.128.4.225 – 10.128.4.25410.128.4.255
4110.128.5.0/2710.128.5.1 – 10.128.5.3010.128.5.31
4210.128.5.32/2710.128.5.33 – 10.128.5.6210.128.5.63
4310.128.5.64/2710.128.5.65 – 10.128.5.9410.128.5.95
4410.128.5.96/2710.128.5.97 – 10.128.5.12610.128.5.127
4510.128.5.128/2710.128.5.129 – 10.128.5.15810.128.5.159
4610.128.5.160/2710.128.5.161 – 10.128.5.19010.128.5.191
4710.128.5.192/2710.128.5.193 – 10.128.5.22210.128.5.223
4810.128.5.224/2710.128.5.225 – 10.128.5.25410.128.5.255
4910.128.6.0/2710.128.6.1 – 10.128.6.3010.128.6.31
5010.128.6.32/2710.128.6.33 – 10.128.6.6210.128.6.63
5110.128.6.64/2710.128.6.65 – 10.128.6.9410.128.6.95
5210.128.6.96/2710.128.6.97 – 10.128.6.12610.128.6.127
5310.128.6.128/2710.128.6.129 – 10.128.6.15810.128.6.159
5410.128.6.160/2710.128.6.161 – 10.128.6.19010.128.6.191
5510.128.6.192/2710.128.6.193 – 10.128.6.22210.128.6.223
5610.128.6.224/2710.128.6.225 – 10.128.6.25410.128.6.255
5710.128.7.0/2710.128.7.1 – 10.128.7.3010.128.7.31
5810.128.7.32/2710.128.7.33 – 10.128.7.6210.128.7.63
5910.128.7.64/2710.128.7.65 – 10.128.7.9410.128.7.95
6010.128.7.96/2710.128.7.97 – 10.128.7.12610.128.7.127
6110.128.7.128/2710.128.7.129 – 10.128.7.15810.128.7.159
6210.128.7.160/2710.128.7.161 – 10.128.7.19010.128.7.191
6310.128.7.192/2710.128.7.193 – 10.128.7.22210.128.7.223
6410.128.7.224/2710.128.7.225 – 10.128.7.25410.128.7.255
6510.128.8.0/2710.128.8.1 – 10.128.8.3010.128.8.31
6610.128.8.32/2710.128.8.33 – 10.128.8.6210.128.8.63
6710.128.8.64/2710.128.8.65 – 10.128.8.9410.128.8.95
6810.128.8.96/2710.128.8.97 – 10.128.8.12610.128.8.127
6910.128.8.128/2710.128.8.129 – 10.128.8.15810.128.8.159
7010.128.8.160/2710.128.8.161 – 10.128.8.19010.128.8.191
7110.128.8.192/2710.128.8.193 – 10.128.8.22210.128.8.223
7210.128.8.224/2710.128.8.225 – 10.128.8.25410.128.8.255
7310.128.9.0/2710.128.9.1 – 10.128.9.3010.128.9.31
7410.128.9.32/2710.128.9.33 – 10.128.9.6210.128.9.63
7510.128.9.64/2710.128.9.65 – 10.128.9.9410.128.9.95
7610.128.9.96/2710.128.9.97 – 10.128.9.12610.128.9.127
7710.128.9.128/2710.128.9.129 – 10.128.9.15810.128.9.159
7810.128.9.160/2710.128.9.161 – 10.128.9.19010.128.9.191
7910.128.9.192/2710.128.9.193 – 10.128.9.22210.128.9.223
8010.128.9.224/2710.128.9.225 – 10.128.9.25410.128.9.255
8110.128.10.0/2710.128.10.1 – 10.128.10.3010.128.10.31
8210.128.10.32/2710.128.10.33 – 10.128.10.6210.128.10.63
8310.128.10.64/2710.128.10.65 – 10.128.10.9410.128.10.95
8410.128.10.96/2710.128.10.97 – 10.128.10.12610.128.10.127
8510.128.10.128/2710.128.10.129 – 10.128.10.15810.128.10.159
8610.128.10.160/2710.128.10.161 – 10.128.10.19010.128.10.191
8710.128.10.192/2710.128.10.193 – 10.128.10.22210.128.10.223
8810.128.10.224/2710.128.10.225 – 10.128.10.25410.128.10.255
8910.128.11.0/2710.128.11.1 – 10.128.11.3010.128.11.31
9010.128.11.32/2710.128.11.33 – 10.128.11.6210.128.11.63
9110.128.11.64/2710.128.11.65 – 10.128.11.9410.128.11.95
9210.128.11.96/2710.128.11.97 – 10.128.11.12610.128.11.127
9310.128.11.128/2710.128.11.129 – 10.128.11.15810.128.11.159
9410.128.11.160/2710.128.11.161 – 10.128.11.19010.128.11.191
9510.128.11.192/2710.128.11.193 – 10.128.11.22210.128.11.223
9610.128.11.224/2710.128.11.225 – 10.128.11.25410.128.11.255
9710.128.12.0/2710.128.12.1 – 10.128.12.3010.128.12.31
9810.128.12.32/2710.128.12.33 – 10.128.12.6210.128.12.63
9910.128.12.64/2710.128.12.65 – 10.128.12.9410.128.12.95
10010.128.12.96/2710.128.12.97 – 10.128.12.12610.128.12.127
10110.128.12.128/2710.128.12.129 – 10.128.12.15810.128.12.159
10210.128.12.160/2710.128.12.161 – 10.128.12.19010.128.12.191
10310.128.12.192/2710.128.12.193 – 10.128.12.22210.128.12.223
10410.128.12.224/2710.128.12.225 – 10.128.12.25410.128.12.255
10510.128.13.0/2710.128.13.1 – 10.128.13.3010.128.13.31
10610.128.13.32/2710.128.13.33 – 10.128.13.6210.128.13.63
10710.128.13.64/2710.128.13.65 – 10.128.13.9410.128.13.95
10810.128.13.96/2710.128.13.97 – 10.128.13.12610.128.13.127
10910.128.13.128/2710.128.13.129 – 10.128.13.15810.128.13.159
11010.128.13.160/2710.128.13.161 – 10.128.13.19010.128.13.191
11110.128.13.192/2710.128.13.193 – 10.128.13.22210.128.13.223
11210.128.13.224/2710.128.13.225 – 10.128.13.25410.128.13.255
11310.128.14.0/2710.128.14.1 – 10.128.14.3010.128.14.31
11410.128.14.32/2710.128.14.33 – 10.128.14.6210.128.14.63
11510.128.14.64/2710.128.14.65 – 10.128.14.9410.128.14.95
11610.128.14.96/2710.128.14.97 – 10.128.14.12610.128.14.127
11710.128.14.128/2710.128.14.129 – 10.128.14.15810.128.14.159
11810.128.14.160/2710.128.14.161 – 10.128.14.19010.128.14.191
11910.128.14.192/2710.128.14.193 – 10.128.14.22210.128.14.223
12010.128.14.224/2710.128.14.225 – 10.128.14.25410.128.14.255
12110.128.15.0/2710.128.15.1 – 10.128.15.3010.128.15.31
12210.128.15.32/2710.128.15.33 – 10.128.15.6210.128.15.63
12310.128.15.64/2710.128.15.65 – 10.128.15.9410.128.15.95
12410.128.15.96/2710.128.15.97 – 10.128.15.12610.128.15.127
12510.128.15.128/2710.128.15.129 – 10.128.15.15810.128.15.159
12610.128.15.160/2710.128.15.161 – 10.128.15.19010.128.15.191
12710.128.15.192/2710.128.15.193 – 10.128.15.22210.128.15.223
12810.128.15.224/2710.128.15.225 – 10.128.15.25410.128.15.255
12910.128.16.0/2710.128.16.1 – 10.128.16.3010.128.16.31
13010.128.16.32/2710.128.16.33 – 10.128.16.6210.128.16.63
13110.128.16.64/2710.128.16.65 – 10.128.16.9410.128.16.95
13210.128.16.96/2710.128.16.97 – 10.128.16.12610.128.16.127
13310.128.16.128/2710.128.16.129 – 10.128.16.15810.128.16.159
13410.128.16.160/2710.128.16.161 – 10.128.16.19010.128.16.191
13510.128.16.192/2710.128.16.193 – 10.128.16.22210.128.16.223
13610.128.16.224/2710.128.16.225 – 10.128.16.25410.128.16.255
13710.128.17.0/2710.128.17.1 – 10.128.17.3010.128.17.31
13810.128.17.32/2710.128.17.33 – 10.128.17.6210.128.17.63
13910.128.17.64/2710.128.17.65 – 10.128.17.9410.128.17.95
14010.128.17.96/2710.128.17.97 – 10.128.17.12610.128.17.127
14110.128.17.128/2710.128.17.129 – 10.128.17.15810.128.17.159
14210.128.17.160/2710.128.17.161 – 10.128.17.19010.128.17.191
14310.128.17.192/2710.128.17.193 – 10.128.17.22210.128.17.223
14410.128.17.224/2710.128.17.225 – 10.128.17.25410.128.17.255
14510.128.18.0/2710.128.18.1 – 10.128.18.3010.128.18.31
14610.128.18.32/2710.128.18.33 – 10.128.18.6210.128.18.63
14710.128.18.64/2710.128.18.65 – 10.128.18.9410.128.18.95
14810.128.18.96/2710.128.18.97 – 10.128.18.12610.128.18.127
14910.128.18.128/2710.128.18.129 – 10.128.18.15810.128.18.159
15010.128.18.160/2710.128.18.161 – 10.128.18.19010.128.18.191
15110.128.18.192/2710.128.18.193 – 10.128.18.22210.128.18.223
15210.128.18.224/2710.128.18.225 – 10.128.18.25410.128.18.255
15310.128.19.0/2710.128.19.1 – 10.128.19.3010.128.19.31
15410.128.19.32/2710.128.19.33 – 10.128.19.6210.128.19.63
15510.128.19.64/2710.128.19.65 – 10.128.19.9410.128.19.95
15610.128.19.96/2710.128.19.97 – 10.128.19.12610.128.19.127
15710.128.19.128/2710.128.19.129 – 10.128.19.15810.128.19.159
15810.128.19.160/2710.128.19.161 – 10.128.19.19010.128.19.191
15910.128.19.192/2710.128.19.193 – 10.128.19.22210.128.19.223
16010.128.19.224/2710.128.19.225 – 10.128.19.25410.128.19.255
16110.128.20.0/2710.128.20.1 – 10.128.20.3010.128.20.31
16210.128.20.32/2710.128.20.33 – 10.128.20.6210.128.20.63
16310.128.20.64/2710.128.20.65 – 10.128.20.9410.128.20.95
16410.128.20.96/2710.128.20.97 – 10.128.20.12610.128.20.127
16510.128.20.128/2710.128.20.129 – 10.128.20.15810.128.20.159
16610.128.20.160/2710.128.20.161 – 10.128.20.19010.128.20.191
16710.128.20.192/2710.128.20.193 – 10.128.20.22210.128.20.223
16810.128.20.224/2710.128.20.225 – 10.128.20.25410.128.20.255
16910.128.21.0/2710.128.21.1 – 10.128.21.3010.128.21.31
17010.128.21.32/2710.128.21.33 – 10.128.21.6210.128.21.63
17110.128.21.64/2710.128.21.65 – 10.128.21.9410.128.21.95
17210.128.21.96/2710.128.21.97 – 10.128.21.12610.128.21.127
17310.128.21.128/2710.128.21.129 – 10.128.21.15810.128.21.159
17410.128.21.160/2710.128.21.161 – 10.128.21.19010.128.21.191
17510.128.21.192/2710.128.21.193 – 10.128.21.22210.128.21.223
17610.128.21.224/2710.128.21.225 – 10.128.21.25410.128.21.255
17710.128.22.0/2710.128.22.1 – 10.128.22.3010.128.22.31
17810.128.22.32/2710.128.22.33 – 10.128.22.6210.128.22.63
17910.128.22.64/2710.128.22.65 – 10.128.22.9410.128.22.95
18010.128.22.96/2710.128.22.97 – 10.128.22.12610.128.22.127
18110.128.22.128/2710.128.22.129 – 10.128.22.15810.128.22.159
18210.128.22.160/2710.128.22.161 – 10.128.22.19010.128.22.191
18310.128.22.192/2710.128.22.193 – 10.128.22.22210.128.22.223
18410.128.22.224/2710.128.22.225 – 10.128.22.25410.128.22.255
18510.128.23.0/2710.128.23.1 – 10.128.23.3010.128.23.31
18610.128.23.32/2710.128.23.33 – 10.128.23.6210.128.23.63
18710.128.23.64/2710.128.23.65 – 10.128.23.9410.128.23.95
18810.128.23.96/2710.128.23.97 – 10.128.23.12610.128.23.127
18910.128.23.128/2710.128.23.129 – 10.128.23.15810.128.23.159
19010.128.23.160/2710.128.23.161 – 10.128.23.19010.128.23.191
19110.128.23.192/2710.128.23.193 – 10.128.23.22210.128.23.223
19210.128.23.224/2710.128.23.225 – 10.128.23.25410.128.23.255
19310.128.24.0/2710.128.24.1 – 10.128.24.3010.128.24.31
19410.128.24.32/2710.128.24.33 – 10.128.24.6210.128.24.63
19510.128.24.64/2710.128.24.65 – 10.128.24.9410.128.24.95
19610.128.24.96/2710.128.24.97 – 10.128.24.12610.128.24.127
19710.128.24.128/2710.128.24.129 – 10.128.24.15810.128.24.159
19810.128.24.160/2710.128.24.161 – 10.128.24.19010.128.24.191
19910.128.24.192/2710.128.24.193 – 10.128.24.22210.128.24.223
20010.128.24.224/2710.128.24.225 – 10.128.24.25410.128.24.255
20110.128.25.0/2710.128.25.1 – 10.128.25.3010.128.25.31
20210.128.25.32/2710.128.25.33 – 10.128.25.6210.128.25.63
20310.128.25.64/2710.128.25.65 – 10.128.25.9410.128.25.95
20410.128.25.96/2710.128.25.97 – 10.128.25.12610.128.25.127
20510.128.25.128/2710.128.25.129 – 10.128.25.15810.128.25.159
20610.128.25.160/2710.128.25.161 – 10.128.25.19010.128.25.191
20710.128.25.192/2710.128.25.193 – 10.128.25.22210.128.25.223
20810.128.25.224/2710.128.25.225 – 10.128.25.25410.128.25.255
20910.128.26.0/2710.128.26.1 – 10.128.26.3010.128.26.31
21010.128.26.32/2710.128.26.33 – 10.128.26.6210.128.26.63
21110.128.26.64/2710.128.26.65 – 10.128.26.9410.128.26.95
21210.128.26.96/2710.128.26.97 – 10.128.26.12610.128.26.127
21310.128.26.128/2710.128.26.129 – 10.128.26.15810.128.26.159
21410.128.26.160/2710.128.26.161 – 10.128.26.19010.128.26.191
21510.128.26.192/2710.128.26.193 – 10.128.26.22210.128.26.223
21610.128.26.224/2710.128.26.225 – 10.128.26.25410.128.26.255
21710.128.27.0/2710.128.27.1 – 10.128.27.3010.128.27.31
21810.128.27.32/2710.128.27.33 – 10.128.27.6210.128.27.63
21910.128.27.64/2710.128.27.65 – 10.128.27.9410.128.27.95
22010.128.27.96/2710.128.27.97 – 10.128.27.12610.128.27.127
22110.128.27.128/2710.128.27.129 – 10.128.27.15810.128.27.159
22210.128.27.160/2710.128.27.161 – 10.128.27.19010.128.27.191
22310.128.27.192/2710.128.27.193 – 10.128.27.22210.128.27.223
22410.128.27.224/2710.128.27.225 – 10.128.27.25410.128.27.255
22510.128.28.0/2710.128.28.1 – 10.128.28.3010.128.28.31
22610.128.28.32/2710.128.28.33 – 10.128.28.6210.128.28.63
22710.128.28.64/2710.128.28.65 – 10.128.28.9410.128.28.95
22810.128.28.96/2710.128.28.97 – 10.128.28.12610.128.28.127
22910.128.28.128/2710.128.28.129 – 10.128.28.15810.128.28.159
23010.128.28.160/2710.128.28.161 – 10.128.28.19010.128.28.191
23110.128.28.192/2710.128.28.193 – 10.128.28.22210.128.28.223
23210.128.28.224/2710.128.28.225 – 10.128.28.25410.128.28.255
23310.128.29.0/2710.128.29.1 – 10.128.29.3010.128.29.31
23410.128.29.32/2710.128.29.33 – 10.128.29.6210.128.29.63
23510.128.29.64/2710.128.29.65 – 10.128.29.9410.128.29.95
23610.128.29.96/2710.128.29.97 – 10.128.29.12610.128.29.127
23710.128.29.128/2710.128.29.129 – 10.128.29.15810.128.29.159
23810.128.29.160/2710.128.29.161 – 10.128.29.19010.128.29.191
23910.128.29.192/2710.128.29.193 – 10.128.29.22210.128.29.223
24010.128.29.224/2710.128.29.225 – 10.128.29.25410.128.29.255
24110.128.30.0/2710.128.30.1 – 10.128.30.3010.128.30.31
24210.128.30.32/2710.128.30.33 – 10.128.30.6210.128.30.63
24310.128.30.64/2710.128.30.65 – 10.128.30.9410.128.30.95
24410.128.30.96/2710.128.30.97 – 10.128.30.12610.128.30.127
24510.128.30.128/2710.128.30.129 – 10.128.30.15810.128.30.159
24610.128.30.160/2710.128.30.161 – 10.128.30.19010.128.30.191
24710.128.30.192/2710.128.30.193 – 10.128.30.22210.128.30.223
24810.128.30.224/2710.128.30.225 – 10.128.30.25410.128.30.255
24910.128.31.0/2710.128.31.1 – 10.128.31.3010.128.31.31
25010.128.31.32/2710.128.31.33 – 10.128.31.6210.128.31.63
25110.128.31.64/2710.128.31.65 – 10.128.31.9410.128.31.95
25210.128.31.96/2710.128.31.97 – 10.128.31.12610.128.31.127
25310.128.31.128/2710.128.31.129 – 10.128.31.15810.128.31.159
25410.128.31.160/2710.128.31.161 – 10.128.31.19010.128.31.191
25510.128.31.192/2710.128.31.193 – 10.128.31.22210.128.31.223
25610.128.31.224/2710.128.31.225 – 10.128.31.25410.128.31.255

showing 256 of 262,144

01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /9
/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-
/9255.128.0.08,388,6088,388,6061
/10255.192.0.04,194,3044,194,3022 split →
/11255.224.0.02,097,1522,097,1504 split →
/12255.240.0.01,048,5761,048,5748 split →
/13255.248.0.0524,288524,28616 split →
/14255.252.0.0262,144262,14232 split →
/15255.254.0.0131,072131,07064 split →
/16255.255.0.065,53665,534128 split →
/17255.255.128.032,76832,766256 split →
/18255.255.192.016,38416,382512 split →
/19255.255.224.08,1928,1901,024 split →
/20255.255.240.04,0964,0942,048 split →
/21255.255.248.02,0482,0464,096 split →
/22255.255.252.01,0241,0228,192 split →
/23255.255.254.051251016,384 split →
/24255.255.255.025625432,768 split →
/25255.255.255.12812812665,536 split →
/26255.255.255.1926462131,072 split →
/27255.255.255.2243230262,144 split →
/28255.255.255.2401614524,288 split →
/29255.255.255.248861,048,576 split →
/30255.255.255.252422,097,152 split →
/31255.255.255.254224,194,304 split →
/32255.255.255.255118,388,608 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 →