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)10.7.40.0/21
network10.7.40.0/21
broadcast10.7.47.255
first host10.7.40.1
last host10.7.47.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.7.40.0/21
address00001010.00000111.00101000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000111.00101000.00000000
broadcast00001010.00000111.00101111.11111111
green = network part, grey = host part
hex0x0a072800
decimal168241152
reverse dns0.40.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:2800

/21 split into /29 · 256 subnets

close ×
#networkhost rangebroadcast
110.7.40.0/2910.7.40.1 – 10.7.40.610.7.40.7
210.7.40.8/2910.7.40.9 – 10.7.40.1410.7.40.15
310.7.40.16/2910.7.40.17 – 10.7.40.2210.7.40.23
410.7.40.24/2910.7.40.25 – 10.7.40.3010.7.40.31
510.7.40.32/2910.7.40.33 – 10.7.40.3810.7.40.39
610.7.40.40/2910.7.40.41 – 10.7.40.4610.7.40.47
710.7.40.48/2910.7.40.49 – 10.7.40.5410.7.40.55
810.7.40.56/2910.7.40.57 – 10.7.40.6210.7.40.63
910.7.40.64/2910.7.40.65 – 10.7.40.7010.7.40.71
1010.7.40.72/2910.7.40.73 – 10.7.40.7810.7.40.79
1110.7.40.80/2910.7.40.81 – 10.7.40.8610.7.40.87
1210.7.40.88/2910.7.40.89 – 10.7.40.9410.7.40.95
1310.7.40.96/2910.7.40.97 – 10.7.40.10210.7.40.103
1410.7.40.104/2910.7.40.105 – 10.7.40.11010.7.40.111
1510.7.40.112/2910.7.40.113 – 10.7.40.11810.7.40.119
1610.7.40.120/2910.7.40.121 – 10.7.40.12610.7.40.127
1710.7.40.128/2910.7.40.129 – 10.7.40.13410.7.40.135
1810.7.40.136/2910.7.40.137 – 10.7.40.14210.7.40.143
1910.7.40.144/2910.7.40.145 – 10.7.40.15010.7.40.151
2010.7.40.152/2910.7.40.153 – 10.7.40.15810.7.40.159
2110.7.40.160/2910.7.40.161 – 10.7.40.16610.7.40.167
2210.7.40.168/2910.7.40.169 – 10.7.40.17410.7.40.175
2310.7.40.176/2910.7.40.177 – 10.7.40.18210.7.40.183
2410.7.40.184/2910.7.40.185 – 10.7.40.19010.7.40.191
2510.7.40.192/2910.7.40.193 – 10.7.40.19810.7.40.199
2610.7.40.200/2910.7.40.201 – 10.7.40.20610.7.40.207
2710.7.40.208/2910.7.40.209 – 10.7.40.21410.7.40.215
2810.7.40.216/2910.7.40.217 – 10.7.40.22210.7.40.223
2910.7.40.224/2910.7.40.225 – 10.7.40.23010.7.40.231
3010.7.40.232/2910.7.40.233 – 10.7.40.23810.7.40.239
3110.7.40.240/2910.7.40.241 – 10.7.40.24610.7.40.247
3210.7.40.248/2910.7.40.249 – 10.7.40.25410.7.40.255
3310.7.41.0/2910.7.41.1 – 10.7.41.610.7.41.7
3410.7.41.8/2910.7.41.9 – 10.7.41.1410.7.41.15
3510.7.41.16/2910.7.41.17 – 10.7.41.2210.7.41.23
3610.7.41.24/2910.7.41.25 – 10.7.41.3010.7.41.31
3710.7.41.32/2910.7.41.33 – 10.7.41.3810.7.41.39
3810.7.41.40/2910.7.41.41 – 10.7.41.4610.7.41.47
3910.7.41.48/2910.7.41.49 – 10.7.41.5410.7.41.55
4010.7.41.56/2910.7.41.57 – 10.7.41.6210.7.41.63
4110.7.41.64/2910.7.41.65 – 10.7.41.7010.7.41.71
4210.7.41.72/2910.7.41.73 – 10.7.41.7810.7.41.79
4310.7.41.80/2910.7.41.81 – 10.7.41.8610.7.41.87
4410.7.41.88/2910.7.41.89 – 10.7.41.9410.7.41.95
4510.7.41.96/2910.7.41.97 – 10.7.41.10210.7.41.103
4610.7.41.104/2910.7.41.105 – 10.7.41.11010.7.41.111
4710.7.41.112/2910.7.41.113 – 10.7.41.11810.7.41.119
4810.7.41.120/2910.7.41.121 – 10.7.41.12610.7.41.127
4910.7.41.128/2910.7.41.129 – 10.7.41.13410.7.41.135
5010.7.41.136/2910.7.41.137 – 10.7.41.14210.7.41.143
5110.7.41.144/2910.7.41.145 – 10.7.41.15010.7.41.151
5210.7.41.152/2910.7.41.153 – 10.7.41.15810.7.41.159
5310.7.41.160/2910.7.41.161 – 10.7.41.16610.7.41.167
5410.7.41.168/2910.7.41.169 – 10.7.41.17410.7.41.175
5510.7.41.176/2910.7.41.177 – 10.7.41.18210.7.41.183
5610.7.41.184/2910.7.41.185 – 10.7.41.19010.7.41.191
5710.7.41.192/2910.7.41.193 – 10.7.41.19810.7.41.199
5810.7.41.200/2910.7.41.201 – 10.7.41.20610.7.41.207
5910.7.41.208/2910.7.41.209 – 10.7.41.21410.7.41.215
6010.7.41.216/2910.7.41.217 – 10.7.41.22210.7.41.223
6110.7.41.224/2910.7.41.225 – 10.7.41.23010.7.41.231
6210.7.41.232/2910.7.41.233 – 10.7.41.23810.7.41.239
6310.7.41.240/2910.7.41.241 – 10.7.41.24610.7.41.247
6410.7.41.248/2910.7.41.249 – 10.7.41.25410.7.41.255
6510.7.42.0/2910.7.42.1 – 10.7.42.610.7.42.7
6610.7.42.8/2910.7.42.9 – 10.7.42.1410.7.42.15
6710.7.42.16/2910.7.42.17 – 10.7.42.2210.7.42.23
6810.7.42.24/2910.7.42.25 – 10.7.42.3010.7.42.31
6910.7.42.32/2910.7.42.33 – 10.7.42.3810.7.42.39
7010.7.42.40/2910.7.42.41 – 10.7.42.4610.7.42.47
7110.7.42.48/2910.7.42.49 – 10.7.42.5410.7.42.55
7210.7.42.56/2910.7.42.57 – 10.7.42.6210.7.42.63
7310.7.42.64/2910.7.42.65 – 10.7.42.7010.7.42.71
7410.7.42.72/2910.7.42.73 – 10.7.42.7810.7.42.79
7510.7.42.80/2910.7.42.81 – 10.7.42.8610.7.42.87
7610.7.42.88/2910.7.42.89 – 10.7.42.9410.7.42.95
7710.7.42.96/2910.7.42.97 – 10.7.42.10210.7.42.103
7810.7.42.104/2910.7.42.105 – 10.7.42.11010.7.42.111
7910.7.42.112/2910.7.42.113 – 10.7.42.11810.7.42.119
8010.7.42.120/2910.7.42.121 – 10.7.42.12610.7.42.127
8110.7.42.128/2910.7.42.129 – 10.7.42.13410.7.42.135
8210.7.42.136/2910.7.42.137 – 10.7.42.14210.7.42.143
8310.7.42.144/2910.7.42.145 – 10.7.42.15010.7.42.151
8410.7.42.152/2910.7.42.153 – 10.7.42.15810.7.42.159
8510.7.42.160/2910.7.42.161 – 10.7.42.16610.7.42.167
8610.7.42.168/2910.7.42.169 – 10.7.42.17410.7.42.175
8710.7.42.176/2910.7.42.177 – 10.7.42.18210.7.42.183
8810.7.42.184/2910.7.42.185 – 10.7.42.19010.7.42.191
8910.7.42.192/2910.7.42.193 – 10.7.42.19810.7.42.199
9010.7.42.200/2910.7.42.201 – 10.7.42.20610.7.42.207
9110.7.42.208/2910.7.42.209 – 10.7.42.21410.7.42.215
9210.7.42.216/2910.7.42.217 – 10.7.42.22210.7.42.223
9310.7.42.224/2910.7.42.225 – 10.7.42.23010.7.42.231
9410.7.42.232/2910.7.42.233 – 10.7.42.23810.7.42.239
9510.7.42.240/2910.7.42.241 – 10.7.42.24610.7.42.247
9610.7.42.248/2910.7.42.249 – 10.7.42.25410.7.42.255
9710.7.43.0/2910.7.43.1 – 10.7.43.610.7.43.7
9810.7.43.8/2910.7.43.9 – 10.7.43.1410.7.43.15
9910.7.43.16/2910.7.43.17 – 10.7.43.2210.7.43.23
10010.7.43.24/2910.7.43.25 – 10.7.43.3010.7.43.31
10110.7.43.32/2910.7.43.33 – 10.7.43.3810.7.43.39
10210.7.43.40/2910.7.43.41 – 10.7.43.4610.7.43.47
10310.7.43.48/2910.7.43.49 – 10.7.43.5410.7.43.55
10410.7.43.56/2910.7.43.57 – 10.7.43.6210.7.43.63
10510.7.43.64/2910.7.43.65 – 10.7.43.7010.7.43.71
10610.7.43.72/2910.7.43.73 – 10.7.43.7810.7.43.79
10710.7.43.80/2910.7.43.81 – 10.7.43.8610.7.43.87
10810.7.43.88/2910.7.43.89 – 10.7.43.9410.7.43.95
10910.7.43.96/2910.7.43.97 – 10.7.43.10210.7.43.103
11010.7.43.104/2910.7.43.105 – 10.7.43.11010.7.43.111
11110.7.43.112/2910.7.43.113 – 10.7.43.11810.7.43.119
11210.7.43.120/2910.7.43.121 – 10.7.43.12610.7.43.127
11310.7.43.128/2910.7.43.129 – 10.7.43.13410.7.43.135
11410.7.43.136/2910.7.43.137 – 10.7.43.14210.7.43.143
11510.7.43.144/2910.7.43.145 – 10.7.43.15010.7.43.151
11610.7.43.152/2910.7.43.153 – 10.7.43.15810.7.43.159
11710.7.43.160/2910.7.43.161 – 10.7.43.16610.7.43.167
11810.7.43.168/2910.7.43.169 – 10.7.43.17410.7.43.175
11910.7.43.176/2910.7.43.177 – 10.7.43.18210.7.43.183
12010.7.43.184/2910.7.43.185 – 10.7.43.19010.7.43.191
12110.7.43.192/2910.7.43.193 – 10.7.43.19810.7.43.199
12210.7.43.200/2910.7.43.201 – 10.7.43.20610.7.43.207
12310.7.43.208/2910.7.43.209 – 10.7.43.21410.7.43.215
12410.7.43.216/2910.7.43.217 – 10.7.43.22210.7.43.223
12510.7.43.224/2910.7.43.225 – 10.7.43.23010.7.43.231
12610.7.43.232/2910.7.43.233 – 10.7.43.23810.7.43.239
12710.7.43.240/2910.7.43.241 – 10.7.43.24610.7.43.247
12810.7.43.248/2910.7.43.249 – 10.7.43.25410.7.43.255
12910.7.44.0/2910.7.44.1 – 10.7.44.610.7.44.7
13010.7.44.8/2910.7.44.9 – 10.7.44.1410.7.44.15
13110.7.44.16/2910.7.44.17 – 10.7.44.2210.7.44.23
13210.7.44.24/2910.7.44.25 – 10.7.44.3010.7.44.31
13310.7.44.32/2910.7.44.33 – 10.7.44.3810.7.44.39
13410.7.44.40/2910.7.44.41 – 10.7.44.4610.7.44.47
13510.7.44.48/2910.7.44.49 – 10.7.44.5410.7.44.55
13610.7.44.56/2910.7.44.57 – 10.7.44.6210.7.44.63
13710.7.44.64/2910.7.44.65 – 10.7.44.7010.7.44.71
13810.7.44.72/2910.7.44.73 – 10.7.44.7810.7.44.79
13910.7.44.80/2910.7.44.81 – 10.7.44.8610.7.44.87
14010.7.44.88/2910.7.44.89 – 10.7.44.9410.7.44.95
14110.7.44.96/2910.7.44.97 – 10.7.44.10210.7.44.103
14210.7.44.104/2910.7.44.105 – 10.7.44.11010.7.44.111
14310.7.44.112/2910.7.44.113 – 10.7.44.11810.7.44.119
14410.7.44.120/2910.7.44.121 – 10.7.44.12610.7.44.127
14510.7.44.128/2910.7.44.129 – 10.7.44.13410.7.44.135
14610.7.44.136/2910.7.44.137 – 10.7.44.14210.7.44.143
14710.7.44.144/2910.7.44.145 – 10.7.44.15010.7.44.151
14810.7.44.152/2910.7.44.153 – 10.7.44.15810.7.44.159
14910.7.44.160/2910.7.44.161 – 10.7.44.16610.7.44.167
15010.7.44.168/2910.7.44.169 – 10.7.44.17410.7.44.175
15110.7.44.176/2910.7.44.177 – 10.7.44.18210.7.44.183
15210.7.44.184/2910.7.44.185 – 10.7.44.19010.7.44.191
15310.7.44.192/2910.7.44.193 – 10.7.44.19810.7.44.199
15410.7.44.200/2910.7.44.201 – 10.7.44.20610.7.44.207
15510.7.44.208/2910.7.44.209 – 10.7.44.21410.7.44.215
15610.7.44.216/2910.7.44.217 – 10.7.44.22210.7.44.223
15710.7.44.224/2910.7.44.225 – 10.7.44.23010.7.44.231
15810.7.44.232/2910.7.44.233 – 10.7.44.23810.7.44.239
15910.7.44.240/2910.7.44.241 – 10.7.44.24610.7.44.247
16010.7.44.248/2910.7.44.249 – 10.7.44.25410.7.44.255
16110.7.45.0/2910.7.45.1 – 10.7.45.610.7.45.7
16210.7.45.8/2910.7.45.9 – 10.7.45.1410.7.45.15
16310.7.45.16/2910.7.45.17 – 10.7.45.2210.7.45.23
16410.7.45.24/2910.7.45.25 – 10.7.45.3010.7.45.31
16510.7.45.32/2910.7.45.33 – 10.7.45.3810.7.45.39
16610.7.45.40/2910.7.45.41 – 10.7.45.4610.7.45.47
16710.7.45.48/2910.7.45.49 – 10.7.45.5410.7.45.55
16810.7.45.56/2910.7.45.57 – 10.7.45.6210.7.45.63
16910.7.45.64/2910.7.45.65 – 10.7.45.7010.7.45.71
17010.7.45.72/2910.7.45.73 – 10.7.45.7810.7.45.79
17110.7.45.80/2910.7.45.81 – 10.7.45.8610.7.45.87
17210.7.45.88/2910.7.45.89 – 10.7.45.9410.7.45.95
17310.7.45.96/2910.7.45.97 – 10.7.45.10210.7.45.103
17410.7.45.104/2910.7.45.105 – 10.7.45.11010.7.45.111
17510.7.45.112/2910.7.45.113 – 10.7.45.11810.7.45.119
17610.7.45.120/2910.7.45.121 – 10.7.45.12610.7.45.127
17710.7.45.128/2910.7.45.129 – 10.7.45.13410.7.45.135
17810.7.45.136/2910.7.45.137 – 10.7.45.14210.7.45.143
17910.7.45.144/2910.7.45.145 – 10.7.45.15010.7.45.151
18010.7.45.152/2910.7.45.153 – 10.7.45.15810.7.45.159
18110.7.45.160/2910.7.45.161 – 10.7.45.16610.7.45.167
18210.7.45.168/2910.7.45.169 – 10.7.45.17410.7.45.175
18310.7.45.176/2910.7.45.177 – 10.7.45.18210.7.45.183
18410.7.45.184/2910.7.45.185 – 10.7.45.19010.7.45.191
18510.7.45.192/2910.7.45.193 – 10.7.45.19810.7.45.199
18610.7.45.200/2910.7.45.201 – 10.7.45.20610.7.45.207
18710.7.45.208/2910.7.45.209 – 10.7.45.21410.7.45.215
18810.7.45.216/2910.7.45.217 – 10.7.45.22210.7.45.223
18910.7.45.224/2910.7.45.225 – 10.7.45.23010.7.45.231
19010.7.45.232/2910.7.45.233 – 10.7.45.23810.7.45.239
19110.7.45.240/2910.7.45.241 – 10.7.45.24610.7.45.247
19210.7.45.248/2910.7.45.249 – 10.7.45.25410.7.45.255
19310.7.46.0/2910.7.46.1 – 10.7.46.610.7.46.7
19410.7.46.8/2910.7.46.9 – 10.7.46.1410.7.46.15
19510.7.46.16/2910.7.46.17 – 10.7.46.2210.7.46.23
19610.7.46.24/2910.7.46.25 – 10.7.46.3010.7.46.31
19710.7.46.32/2910.7.46.33 – 10.7.46.3810.7.46.39
19810.7.46.40/2910.7.46.41 – 10.7.46.4610.7.46.47
19910.7.46.48/2910.7.46.49 – 10.7.46.5410.7.46.55
20010.7.46.56/2910.7.46.57 – 10.7.46.6210.7.46.63
20110.7.46.64/2910.7.46.65 – 10.7.46.7010.7.46.71
20210.7.46.72/2910.7.46.73 – 10.7.46.7810.7.46.79
20310.7.46.80/2910.7.46.81 – 10.7.46.8610.7.46.87
20410.7.46.88/2910.7.46.89 – 10.7.46.9410.7.46.95
20510.7.46.96/2910.7.46.97 – 10.7.46.10210.7.46.103
20610.7.46.104/2910.7.46.105 – 10.7.46.11010.7.46.111
20710.7.46.112/2910.7.46.113 – 10.7.46.11810.7.46.119
20810.7.46.120/2910.7.46.121 – 10.7.46.12610.7.46.127
20910.7.46.128/2910.7.46.129 – 10.7.46.13410.7.46.135
21010.7.46.136/2910.7.46.137 – 10.7.46.14210.7.46.143
21110.7.46.144/2910.7.46.145 – 10.7.46.15010.7.46.151
21210.7.46.152/2910.7.46.153 – 10.7.46.15810.7.46.159
21310.7.46.160/2910.7.46.161 – 10.7.46.16610.7.46.167
21410.7.46.168/2910.7.46.169 – 10.7.46.17410.7.46.175
21510.7.46.176/2910.7.46.177 – 10.7.46.18210.7.46.183
21610.7.46.184/2910.7.46.185 – 10.7.46.19010.7.46.191
21710.7.46.192/2910.7.46.193 – 10.7.46.19810.7.46.199
21810.7.46.200/2910.7.46.201 – 10.7.46.20610.7.46.207
21910.7.46.208/2910.7.46.209 – 10.7.46.21410.7.46.215
22010.7.46.216/2910.7.46.217 – 10.7.46.22210.7.46.223
22110.7.46.224/2910.7.46.225 – 10.7.46.23010.7.46.231
22210.7.46.232/2910.7.46.233 – 10.7.46.23810.7.46.239
22310.7.46.240/2910.7.46.241 – 10.7.46.24610.7.46.247
22410.7.46.248/2910.7.46.249 – 10.7.46.25410.7.46.255
22510.7.47.0/2910.7.47.1 – 10.7.47.610.7.47.7
22610.7.47.8/2910.7.47.9 – 10.7.47.1410.7.47.15
22710.7.47.16/2910.7.47.17 – 10.7.47.2210.7.47.23
22810.7.47.24/2910.7.47.25 – 10.7.47.3010.7.47.31
22910.7.47.32/2910.7.47.33 – 10.7.47.3810.7.47.39
23010.7.47.40/2910.7.47.41 – 10.7.47.4610.7.47.47
23110.7.47.48/2910.7.47.49 – 10.7.47.5410.7.47.55
23210.7.47.56/2910.7.47.57 – 10.7.47.6210.7.47.63
23310.7.47.64/2910.7.47.65 – 10.7.47.7010.7.47.71
23410.7.47.72/2910.7.47.73 – 10.7.47.7810.7.47.79
23510.7.47.80/2910.7.47.81 – 10.7.47.8610.7.47.87
23610.7.47.88/2910.7.47.89 – 10.7.47.9410.7.47.95
23710.7.47.96/2910.7.47.97 – 10.7.47.10210.7.47.103
23810.7.47.104/2910.7.47.105 – 10.7.47.11010.7.47.111
23910.7.47.112/2910.7.47.113 – 10.7.47.11810.7.47.119
24010.7.47.120/2910.7.47.121 – 10.7.47.12610.7.47.127
24110.7.47.128/2910.7.47.129 – 10.7.47.13410.7.47.135
24210.7.47.136/2910.7.47.137 – 10.7.47.14210.7.47.143
24310.7.47.144/2910.7.47.145 – 10.7.47.15010.7.47.151
24410.7.47.152/2910.7.47.153 – 10.7.47.15810.7.47.159
24510.7.47.160/2910.7.47.161 – 10.7.47.16610.7.47.167
24610.7.47.168/2910.7.47.169 – 10.7.47.17410.7.47.175
24710.7.47.176/2910.7.47.177 – 10.7.47.18210.7.47.183
24810.7.47.184/2910.7.47.185 – 10.7.47.19010.7.47.191
24910.7.47.192/2910.7.47.193 – 10.7.47.19810.7.47.199
25010.7.47.200/2910.7.47.201 – 10.7.47.20610.7.47.207
25110.7.47.208/2910.7.47.209 – 10.7.47.21410.7.47.215
25210.7.47.216/2910.7.47.217 – 10.7.47.22210.7.47.223
25310.7.47.224/2910.7.47.225 – 10.7.47.23010.7.47.231
25410.7.47.232/2910.7.47.233 – 10.7.47.23810.7.47.239
25510.7.47.240/2910.7.47.241 – 10.7.47.24610.7.47.247
25610.7.47.248/2910.7.47.249 – 10.7.47.25410.7.47.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /21
/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-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,190-
/20255.255.240.04,0964,094-
/21255.255.248.02,0482,0461
/22255.255.252.01,0241,0222 split →
/23255.255.254.05125104 split →
/24255.255.255.02562548 split →
/25255.255.255.12812812616 split →
/26255.255.255.192646232 split →
/27255.255.255.224323064 split →
/28255.255.255.2401614128 split →
/29255.255.255.24886256 split →
/30255.255.255.25242512 split →
/31255.255.255.254221,024 split →
/32255.255.255.255112,048 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 →