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)10.3.88.0/21
network10.3.88.0/21
broadcast10.3.95.255
first host10.3.88.1
last host10.3.95.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.3.88.0/21
address00001010.00000011.01011000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000011.01011000.00000000
broadcast00001010.00000011.01011111.11111111
green = network part, grey = host part
hex0x0a035800
decimal167991296
reverse dns0.88.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:5800

/21 split into /29 · 256 subnets

close ×
#networkhost rangebroadcast
110.3.88.0/2910.3.88.1 – 10.3.88.610.3.88.7
210.3.88.8/2910.3.88.9 – 10.3.88.1410.3.88.15
310.3.88.16/2910.3.88.17 – 10.3.88.2210.3.88.23
410.3.88.24/2910.3.88.25 – 10.3.88.3010.3.88.31
510.3.88.32/2910.3.88.33 – 10.3.88.3810.3.88.39
610.3.88.40/2910.3.88.41 – 10.3.88.4610.3.88.47
710.3.88.48/2910.3.88.49 – 10.3.88.5410.3.88.55
810.3.88.56/2910.3.88.57 – 10.3.88.6210.3.88.63
910.3.88.64/2910.3.88.65 – 10.3.88.7010.3.88.71
1010.3.88.72/2910.3.88.73 – 10.3.88.7810.3.88.79
1110.3.88.80/2910.3.88.81 – 10.3.88.8610.3.88.87
1210.3.88.88/2910.3.88.89 – 10.3.88.9410.3.88.95
1310.3.88.96/2910.3.88.97 – 10.3.88.10210.3.88.103
1410.3.88.104/2910.3.88.105 – 10.3.88.11010.3.88.111
1510.3.88.112/2910.3.88.113 – 10.3.88.11810.3.88.119
1610.3.88.120/2910.3.88.121 – 10.3.88.12610.3.88.127
1710.3.88.128/2910.3.88.129 – 10.3.88.13410.3.88.135
1810.3.88.136/2910.3.88.137 – 10.3.88.14210.3.88.143
1910.3.88.144/2910.3.88.145 – 10.3.88.15010.3.88.151
2010.3.88.152/2910.3.88.153 – 10.3.88.15810.3.88.159
2110.3.88.160/2910.3.88.161 – 10.3.88.16610.3.88.167
2210.3.88.168/2910.3.88.169 – 10.3.88.17410.3.88.175
2310.3.88.176/2910.3.88.177 – 10.3.88.18210.3.88.183
2410.3.88.184/2910.3.88.185 – 10.3.88.19010.3.88.191
2510.3.88.192/2910.3.88.193 – 10.3.88.19810.3.88.199
2610.3.88.200/2910.3.88.201 – 10.3.88.20610.3.88.207
2710.3.88.208/2910.3.88.209 – 10.3.88.21410.3.88.215
2810.3.88.216/2910.3.88.217 – 10.3.88.22210.3.88.223
2910.3.88.224/2910.3.88.225 – 10.3.88.23010.3.88.231
3010.3.88.232/2910.3.88.233 – 10.3.88.23810.3.88.239
3110.3.88.240/2910.3.88.241 – 10.3.88.24610.3.88.247
3210.3.88.248/2910.3.88.249 – 10.3.88.25410.3.88.255
3310.3.89.0/2910.3.89.1 – 10.3.89.610.3.89.7
3410.3.89.8/2910.3.89.9 – 10.3.89.1410.3.89.15
3510.3.89.16/2910.3.89.17 – 10.3.89.2210.3.89.23
3610.3.89.24/2910.3.89.25 – 10.3.89.3010.3.89.31
3710.3.89.32/2910.3.89.33 – 10.3.89.3810.3.89.39
3810.3.89.40/2910.3.89.41 – 10.3.89.4610.3.89.47
3910.3.89.48/2910.3.89.49 – 10.3.89.5410.3.89.55
4010.3.89.56/2910.3.89.57 – 10.3.89.6210.3.89.63
4110.3.89.64/2910.3.89.65 – 10.3.89.7010.3.89.71
4210.3.89.72/2910.3.89.73 – 10.3.89.7810.3.89.79
4310.3.89.80/2910.3.89.81 – 10.3.89.8610.3.89.87
4410.3.89.88/2910.3.89.89 – 10.3.89.9410.3.89.95
4510.3.89.96/2910.3.89.97 – 10.3.89.10210.3.89.103
4610.3.89.104/2910.3.89.105 – 10.3.89.11010.3.89.111
4710.3.89.112/2910.3.89.113 – 10.3.89.11810.3.89.119
4810.3.89.120/2910.3.89.121 – 10.3.89.12610.3.89.127
4910.3.89.128/2910.3.89.129 – 10.3.89.13410.3.89.135
5010.3.89.136/2910.3.89.137 – 10.3.89.14210.3.89.143
5110.3.89.144/2910.3.89.145 – 10.3.89.15010.3.89.151
5210.3.89.152/2910.3.89.153 – 10.3.89.15810.3.89.159
5310.3.89.160/2910.3.89.161 – 10.3.89.16610.3.89.167
5410.3.89.168/2910.3.89.169 – 10.3.89.17410.3.89.175
5510.3.89.176/2910.3.89.177 – 10.3.89.18210.3.89.183
5610.3.89.184/2910.3.89.185 – 10.3.89.19010.3.89.191
5710.3.89.192/2910.3.89.193 – 10.3.89.19810.3.89.199
5810.3.89.200/2910.3.89.201 – 10.3.89.20610.3.89.207
5910.3.89.208/2910.3.89.209 – 10.3.89.21410.3.89.215
6010.3.89.216/2910.3.89.217 – 10.3.89.22210.3.89.223
6110.3.89.224/2910.3.89.225 – 10.3.89.23010.3.89.231
6210.3.89.232/2910.3.89.233 – 10.3.89.23810.3.89.239
6310.3.89.240/2910.3.89.241 – 10.3.89.24610.3.89.247
6410.3.89.248/2910.3.89.249 – 10.3.89.25410.3.89.255
6510.3.90.0/2910.3.90.1 – 10.3.90.610.3.90.7
6610.3.90.8/2910.3.90.9 – 10.3.90.1410.3.90.15
6710.3.90.16/2910.3.90.17 – 10.3.90.2210.3.90.23
6810.3.90.24/2910.3.90.25 – 10.3.90.3010.3.90.31
6910.3.90.32/2910.3.90.33 – 10.3.90.3810.3.90.39
7010.3.90.40/2910.3.90.41 – 10.3.90.4610.3.90.47
7110.3.90.48/2910.3.90.49 – 10.3.90.5410.3.90.55
7210.3.90.56/2910.3.90.57 – 10.3.90.6210.3.90.63
7310.3.90.64/2910.3.90.65 – 10.3.90.7010.3.90.71
7410.3.90.72/2910.3.90.73 – 10.3.90.7810.3.90.79
7510.3.90.80/2910.3.90.81 – 10.3.90.8610.3.90.87
7610.3.90.88/2910.3.90.89 – 10.3.90.9410.3.90.95
7710.3.90.96/2910.3.90.97 – 10.3.90.10210.3.90.103
7810.3.90.104/2910.3.90.105 – 10.3.90.11010.3.90.111
7910.3.90.112/2910.3.90.113 – 10.3.90.11810.3.90.119
8010.3.90.120/2910.3.90.121 – 10.3.90.12610.3.90.127
8110.3.90.128/2910.3.90.129 – 10.3.90.13410.3.90.135
8210.3.90.136/2910.3.90.137 – 10.3.90.14210.3.90.143
8310.3.90.144/2910.3.90.145 – 10.3.90.15010.3.90.151
8410.3.90.152/2910.3.90.153 – 10.3.90.15810.3.90.159
8510.3.90.160/2910.3.90.161 – 10.3.90.16610.3.90.167
8610.3.90.168/2910.3.90.169 – 10.3.90.17410.3.90.175
8710.3.90.176/2910.3.90.177 – 10.3.90.18210.3.90.183
8810.3.90.184/2910.3.90.185 – 10.3.90.19010.3.90.191
8910.3.90.192/2910.3.90.193 – 10.3.90.19810.3.90.199
9010.3.90.200/2910.3.90.201 – 10.3.90.20610.3.90.207
9110.3.90.208/2910.3.90.209 – 10.3.90.21410.3.90.215
9210.3.90.216/2910.3.90.217 – 10.3.90.22210.3.90.223
9310.3.90.224/2910.3.90.225 – 10.3.90.23010.3.90.231
9410.3.90.232/2910.3.90.233 – 10.3.90.23810.3.90.239
9510.3.90.240/2910.3.90.241 – 10.3.90.24610.3.90.247
9610.3.90.248/2910.3.90.249 – 10.3.90.25410.3.90.255
9710.3.91.0/2910.3.91.1 – 10.3.91.610.3.91.7
9810.3.91.8/2910.3.91.9 – 10.3.91.1410.3.91.15
9910.3.91.16/2910.3.91.17 – 10.3.91.2210.3.91.23
10010.3.91.24/2910.3.91.25 – 10.3.91.3010.3.91.31
10110.3.91.32/2910.3.91.33 – 10.3.91.3810.3.91.39
10210.3.91.40/2910.3.91.41 – 10.3.91.4610.3.91.47
10310.3.91.48/2910.3.91.49 – 10.3.91.5410.3.91.55
10410.3.91.56/2910.3.91.57 – 10.3.91.6210.3.91.63
10510.3.91.64/2910.3.91.65 – 10.3.91.7010.3.91.71
10610.3.91.72/2910.3.91.73 – 10.3.91.7810.3.91.79
10710.3.91.80/2910.3.91.81 – 10.3.91.8610.3.91.87
10810.3.91.88/2910.3.91.89 – 10.3.91.9410.3.91.95
10910.3.91.96/2910.3.91.97 – 10.3.91.10210.3.91.103
11010.3.91.104/2910.3.91.105 – 10.3.91.11010.3.91.111
11110.3.91.112/2910.3.91.113 – 10.3.91.11810.3.91.119
11210.3.91.120/2910.3.91.121 – 10.3.91.12610.3.91.127
11310.3.91.128/2910.3.91.129 – 10.3.91.13410.3.91.135
11410.3.91.136/2910.3.91.137 – 10.3.91.14210.3.91.143
11510.3.91.144/2910.3.91.145 – 10.3.91.15010.3.91.151
11610.3.91.152/2910.3.91.153 – 10.3.91.15810.3.91.159
11710.3.91.160/2910.3.91.161 – 10.3.91.16610.3.91.167
11810.3.91.168/2910.3.91.169 – 10.3.91.17410.3.91.175
11910.3.91.176/2910.3.91.177 – 10.3.91.18210.3.91.183
12010.3.91.184/2910.3.91.185 – 10.3.91.19010.3.91.191
12110.3.91.192/2910.3.91.193 – 10.3.91.19810.3.91.199
12210.3.91.200/2910.3.91.201 – 10.3.91.20610.3.91.207
12310.3.91.208/2910.3.91.209 – 10.3.91.21410.3.91.215
12410.3.91.216/2910.3.91.217 – 10.3.91.22210.3.91.223
12510.3.91.224/2910.3.91.225 – 10.3.91.23010.3.91.231
12610.3.91.232/2910.3.91.233 – 10.3.91.23810.3.91.239
12710.3.91.240/2910.3.91.241 – 10.3.91.24610.3.91.247
12810.3.91.248/2910.3.91.249 – 10.3.91.25410.3.91.255
12910.3.92.0/2910.3.92.1 – 10.3.92.610.3.92.7
13010.3.92.8/2910.3.92.9 – 10.3.92.1410.3.92.15
13110.3.92.16/2910.3.92.17 – 10.3.92.2210.3.92.23
13210.3.92.24/2910.3.92.25 – 10.3.92.3010.3.92.31
13310.3.92.32/2910.3.92.33 – 10.3.92.3810.3.92.39
13410.3.92.40/2910.3.92.41 – 10.3.92.4610.3.92.47
13510.3.92.48/2910.3.92.49 – 10.3.92.5410.3.92.55
13610.3.92.56/2910.3.92.57 – 10.3.92.6210.3.92.63
13710.3.92.64/2910.3.92.65 – 10.3.92.7010.3.92.71
13810.3.92.72/2910.3.92.73 – 10.3.92.7810.3.92.79
13910.3.92.80/2910.3.92.81 – 10.3.92.8610.3.92.87
14010.3.92.88/2910.3.92.89 – 10.3.92.9410.3.92.95
14110.3.92.96/2910.3.92.97 – 10.3.92.10210.3.92.103
14210.3.92.104/2910.3.92.105 – 10.3.92.11010.3.92.111
14310.3.92.112/2910.3.92.113 – 10.3.92.11810.3.92.119
14410.3.92.120/2910.3.92.121 – 10.3.92.12610.3.92.127
14510.3.92.128/2910.3.92.129 – 10.3.92.13410.3.92.135
14610.3.92.136/2910.3.92.137 – 10.3.92.14210.3.92.143
14710.3.92.144/2910.3.92.145 – 10.3.92.15010.3.92.151
14810.3.92.152/2910.3.92.153 – 10.3.92.15810.3.92.159
14910.3.92.160/2910.3.92.161 – 10.3.92.16610.3.92.167
15010.3.92.168/2910.3.92.169 – 10.3.92.17410.3.92.175
15110.3.92.176/2910.3.92.177 – 10.3.92.18210.3.92.183
15210.3.92.184/2910.3.92.185 – 10.3.92.19010.3.92.191
15310.3.92.192/2910.3.92.193 – 10.3.92.19810.3.92.199
15410.3.92.200/2910.3.92.201 – 10.3.92.20610.3.92.207
15510.3.92.208/2910.3.92.209 – 10.3.92.21410.3.92.215
15610.3.92.216/2910.3.92.217 – 10.3.92.22210.3.92.223
15710.3.92.224/2910.3.92.225 – 10.3.92.23010.3.92.231
15810.3.92.232/2910.3.92.233 – 10.3.92.23810.3.92.239
15910.3.92.240/2910.3.92.241 – 10.3.92.24610.3.92.247
16010.3.92.248/2910.3.92.249 – 10.3.92.25410.3.92.255
16110.3.93.0/2910.3.93.1 – 10.3.93.610.3.93.7
16210.3.93.8/2910.3.93.9 – 10.3.93.1410.3.93.15
16310.3.93.16/2910.3.93.17 – 10.3.93.2210.3.93.23
16410.3.93.24/2910.3.93.25 – 10.3.93.3010.3.93.31
16510.3.93.32/2910.3.93.33 – 10.3.93.3810.3.93.39
16610.3.93.40/2910.3.93.41 – 10.3.93.4610.3.93.47
16710.3.93.48/2910.3.93.49 – 10.3.93.5410.3.93.55
16810.3.93.56/2910.3.93.57 – 10.3.93.6210.3.93.63
16910.3.93.64/2910.3.93.65 – 10.3.93.7010.3.93.71
17010.3.93.72/2910.3.93.73 – 10.3.93.7810.3.93.79
17110.3.93.80/2910.3.93.81 – 10.3.93.8610.3.93.87
17210.3.93.88/2910.3.93.89 – 10.3.93.9410.3.93.95
17310.3.93.96/2910.3.93.97 – 10.3.93.10210.3.93.103
17410.3.93.104/2910.3.93.105 – 10.3.93.11010.3.93.111
17510.3.93.112/2910.3.93.113 – 10.3.93.11810.3.93.119
17610.3.93.120/2910.3.93.121 – 10.3.93.12610.3.93.127
17710.3.93.128/2910.3.93.129 – 10.3.93.13410.3.93.135
17810.3.93.136/2910.3.93.137 – 10.3.93.14210.3.93.143
17910.3.93.144/2910.3.93.145 – 10.3.93.15010.3.93.151
18010.3.93.152/2910.3.93.153 – 10.3.93.15810.3.93.159
18110.3.93.160/2910.3.93.161 – 10.3.93.16610.3.93.167
18210.3.93.168/2910.3.93.169 – 10.3.93.17410.3.93.175
18310.3.93.176/2910.3.93.177 – 10.3.93.18210.3.93.183
18410.3.93.184/2910.3.93.185 – 10.3.93.19010.3.93.191
18510.3.93.192/2910.3.93.193 – 10.3.93.19810.3.93.199
18610.3.93.200/2910.3.93.201 – 10.3.93.20610.3.93.207
18710.3.93.208/2910.3.93.209 – 10.3.93.21410.3.93.215
18810.3.93.216/2910.3.93.217 – 10.3.93.22210.3.93.223
18910.3.93.224/2910.3.93.225 – 10.3.93.23010.3.93.231
19010.3.93.232/2910.3.93.233 – 10.3.93.23810.3.93.239
19110.3.93.240/2910.3.93.241 – 10.3.93.24610.3.93.247
19210.3.93.248/2910.3.93.249 – 10.3.93.25410.3.93.255
19310.3.94.0/2910.3.94.1 – 10.3.94.610.3.94.7
19410.3.94.8/2910.3.94.9 – 10.3.94.1410.3.94.15
19510.3.94.16/2910.3.94.17 – 10.3.94.2210.3.94.23
19610.3.94.24/2910.3.94.25 – 10.3.94.3010.3.94.31
19710.3.94.32/2910.3.94.33 – 10.3.94.3810.3.94.39
19810.3.94.40/2910.3.94.41 – 10.3.94.4610.3.94.47
19910.3.94.48/2910.3.94.49 – 10.3.94.5410.3.94.55
20010.3.94.56/2910.3.94.57 – 10.3.94.6210.3.94.63
20110.3.94.64/2910.3.94.65 – 10.3.94.7010.3.94.71
20210.3.94.72/2910.3.94.73 – 10.3.94.7810.3.94.79
20310.3.94.80/2910.3.94.81 – 10.3.94.8610.3.94.87
20410.3.94.88/2910.3.94.89 – 10.3.94.9410.3.94.95
20510.3.94.96/2910.3.94.97 – 10.3.94.10210.3.94.103
20610.3.94.104/2910.3.94.105 – 10.3.94.11010.3.94.111
20710.3.94.112/2910.3.94.113 – 10.3.94.11810.3.94.119
20810.3.94.120/2910.3.94.121 – 10.3.94.12610.3.94.127
20910.3.94.128/2910.3.94.129 – 10.3.94.13410.3.94.135
21010.3.94.136/2910.3.94.137 – 10.3.94.14210.3.94.143
21110.3.94.144/2910.3.94.145 – 10.3.94.15010.3.94.151
21210.3.94.152/2910.3.94.153 – 10.3.94.15810.3.94.159
21310.3.94.160/2910.3.94.161 – 10.3.94.16610.3.94.167
21410.3.94.168/2910.3.94.169 – 10.3.94.17410.3.94.175
21510.3.94.176/2910.3.94.177 – 10.3.94.18210.3.94.183
21610.3.94.184/2910.3.94.185 – 10.3.94.19010.3.94.191
21710.3.94.192/2910.3.94.193 – 10.3.94.19810.3.94.199
21810.3.94.200/2910.3.94.201 – 10.3.94.20610.3.94.207
21910.3.94.208/2910.3.94.209 – 10.3.94.21410.3.94.215
22010.3.94.216/2910.3.94.217 – 10.3.94.22210.3.94.223
22110.3.94.224/2910.3.94.225 – 10.3.94.23010.3.94.231
22210.3.94.232/2910.3.94.233 – 10.3.94.23810.3.94.239
22310.3.94.240/2910.3.94.241 – 10.3.94.24610.3.94.247
22410.3.94.248/2910.3.94.249 – 10.3.94.25410.3.94.255
22510.3.95.0/2910.3.95.1 – 10.3.95.610.3.95.7
22610.3.95.8/2910.3.95.9 – 10.3.95.1410.3.95.15
22710.3.95.16/2910.3.95.17 – 10.3.95.2210.3.95.23
22810.3.95.24/2910.3.95.25 – 10.3.95.3010.3.95.31
22910.3.95.32/2910.3.95.33 – 10.3.95.3810.3.95.39
23010.3.95.40/2910.3.95.41 – 10.3.95.4610.3.95.47
23110.3.95.48/2910.3.95.49 – 10.3.95.5410.3.95.55
23210.3.95.56/2910.3.95.57 – 10.3.95.6210.3.95.63
23310.3.95.64/2910.3.95.65 – 10.3.95.7010.3.95.71
23410.3.95.72/2910.3.95.73 – 10.3.95.7810.3.95.79
23510.3.95.80/2910.3.95.81 – 10.3.95.8610.3.95.87
23610.3.95.88/2910.3.95.89 – 10.3.95.9410.3.95.95
23710.3.95.96/2910.3.95.97 – 10.3.95.10210.3.95.103
23810.3.95.104/2910.3.95.105 – 10.3.95.11010.3.95.111
23910.3.95.112/2910.3.95.113 – 10.3.95.11810.3.95.119
24010.3.95.120/2910.3.95.121 – 10.3.95.12610.3.95.127
24110.3.95.128/2910.3.95.129 – 10.3.95.13410.3.95.135
24210.3.95.136/2910.3.95.137 – 10.3.95.14210.3.95.143
24310.3.95.144/2910.3.95.145 – 10.3.95.15010.3.95.151
24410.3.95.152/2910.3.95.153 – 10.3.95.15810.3.95.159
24510.3.95.160/2910.3.95.161 – 10.3.95.16610.3.95.167
24610.3.95.168/2910.3.95.169 – 10.3.95.17410.3.95.175
24710.3.95.176/2910.3.95.177 – 10.3.95.18210.3.95.183
24810.3.95.184/2910.3.95.185 – 10.3.95.19010.3.95.191
24910.3.95.192/2910.3.95.193 – 10.3.95.19810.3.95.199
25010.3.95.200/2910.3.95.201 – 10.3.95.20610.3.95.207
25110.3.95.208/2910.3.95.209 – 10.3.95.21410.3.95.215
25210.3.95.216/2910.3.95.217 – 10.3.95.22210.3.95.223
25310.3.95.224/2910.3.95.225 – 10.3.95.23010.3.95.231
25410.3.95.232/2910.3.95.233 – 10.3.95.23810.3.95.239
25510.3.95.240/2910.3.95.241 – 10.3.95.24610.3.95.247
25610.3.95.248/2910.3.95.249 – 10.3.95.25410.3.95.255
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 →