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)10.201.80.0/20
network10.201.80.0/20
broadcast10.201.95.255
first host10.201.80.1
last host10.201.95.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.201.80.0/20
address00001010.11001001.01010000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.11001001.01010000.00000000
broadcast00001010.11001001.01011111.11111111
green = network part, grey = host part
hex0x0ac95000
decimal180965376
reverse dns0.80.201.10.in-addr.arpa
ipv4-mapped::ffff:ac9:5000

/20 split into /29 · 512 subnets

close ×
#networkhost rangebroadcast
110.201.80.0/2910.201.80.1 – 10.201.80.610.201.80.7
210.201.80.8/2910.201.80.9 – 10.201.80.1410.201.80.15
310.201.80.16/2910.201.80.17 – 10.201.80.2210.201.80.23
410.201.80.24/2910.201.80.25 – 10.201.80.3010.201.80.31
510.201.80.32/2910.201.80.33 – 10.201.80.3810.201.80.39
610.201.80.40/2910.201.80.41 – 10.201.80.4610.201.80.47
710.201.80.48/2910.201.80.49 – 10.201.80.5410.201.80.55
810.201.80.56/2910.201.80.57 – 10.201.80.6210.201.80.63
910.201.80.64/2910.201.80.65 – 10.201.80.7010.201.80.71
1010.201.80.72/2910.201.80.73 – 10.201.80.7810.201.80.79
1110.201.80.80/2910.201.80.81 – 10.201.80.8610.201.80.87
1210.201.80.88/2910.201.80.89 – 10.201.80.9410.201.80.95
1310.201.80.96/2910.201.80.97 – 10.201.80.10210.201.80.103
1410.201.80.104/2910.201.80.105 – 10.201.80.11010.201.80.111
1510.201.80.112/2910.201.80.113 – 10.201.80.11810.201.80.119
1610.201.80.120/2910.201.80.121 – 10.201.80.12610.201.80.127
1710.201.80.128/2910.201.80.129 – 10.201.80.13410.201.80.135
1810.201.80.136/2910.201.80.137 – 10.201.80.14210.201.80.143
1910.201.80.144/2910.201.80.145 – 10.201.80.15010.201.80.151
2010.201.80.152/2910.201.80.153 – 10.201.80.15810.201.80.159
2110.201.80.160/2910.201.80.161 – 10.201.80.16610.201.80.167
2210.201.80.168/2910.201.80.169 – 10.201.80.17410.201.80.175
2310.201.80.176/2910.201.80.177 – 10.201.80.18210.201.80.183
2410.201.80.184/2910.201.80.185 – 10.201.80.19010.201.80.191
2510.201.80.192/2910.201.80.193 – 10.201.80.19810.201.80.199
2610.201.80.200/2910.201.80.201 – 10.201.80.20610.201.80.207
2710.201.80.208/2910.201.80.209 – 10.201.80.21410.201.80.215
2810.201.80.216/2910.201.80.217 – 10.201.80.22210.201.80.223
2910.201.80.224/2910.201.80.225 – 10.201.80.23010.201.80.231
3010.201.80.232/2910.201.80.233 – 10.201.80.23810.201.80.239
3110.201.80.240/2910.201.80.241 – 10.201.80.24610.201.80.247
3210.201.80.248/2910.201.80.249 – 10.201.80.25410.201.80.255
3310.201.81.0/2910.201.81.1 – 10.201.81.610.201.81.7
3410.201.81.8/2910.201.81.9 – 10.201.81.1410.201.81.15
3510.201.81.16/2910.201.81.17 – 10.201.81.2210.201.81.23
3610.201.81.24/2910.201.81.25 – 10.201.81.3010.201.81.31
3710.201.81.32/2910.201.81.33 – 10.201.81.3810.201.81.39
3810.201.81.40/2910.201.81.41 – 10.201.81.4610.201.81.47
3910.201.81.48/2910.201.81.49 – 10.201.81.5410.201.81.55
4010.201.81.56/2910.201.81.57 – 10.201.81.6210.201.81.63
4110.201.81.64/2910.201.81.65 – 10.201.81.7010.201.81.71
4210.201.81.72/2910.201.81.73 – 10.201.81.7810.201.81.79
4310.201.81.80/2910.201.81.81 – 10.201.81.8610.201.81.87
4410.201.81.88/2910.201.81.89 – 10.201.81.9410.201.81.95
4510.201.81.96/2910.201.81.97 – 10.201.81.10210.201.81.103
4610.201.81.104/2910.201.81.105 – 10.201.81.11010.201.81.111
4710.201.81.112/2910.201.81.113 – 10.201.81.11810.201.81.119
4810.201.81.120/2910.201.81.121 – 10.201.81.12610.201.81.127
4910.201.81.128/2910.201.81.129 – 10.201.81.13410.201.81.135
5010.201.81.136/2910.201.81.137 – 10.201.81.14210.201.81.143
5110.201.81.144/2910.201.81.145 – 10.201.81.15010.201.81.151
5210.201.81.152/2910.201.81.153 – 10.201.81.15810.201.81.159
5310.201.81.160/2910.201.81.161 – 10.201.81.16610.201.81.167
5410.201.81.168/2910.201.81.169 – 10.201.81.17410.201.81.175
5510.201.81.176/2910.201.81.177 – 10.201.81.18210.201.81.183
5610.201.81.184/2910.201.81.185 – 10.201.81.19010.201.81.191
5710.201.81.192/2910.201.81.193 – 10.201.81.19810.201.81.199
5810.201.81.200/2910.201.81.201 – 10.201.81.20610.201.81.207
5910.201.81.208/2910.201.81.209 – 10.201.81.21410.201.81.215
6010.201.81.216/2910.201.81.217 – 10.201.81.22210.201.81.223
6110.201.81.224/2910.201.81.225 – 10.201.81.23010.201.81.231
6210.201.81.232/2910.201.81.233 – 10.201.81.23810.201.81.239
6310.201.81.240/2910.201.81.241 – 10.201.81.24610.201.81.247
6410.201.81.248/2910.201.81.249 – 10.201.81.25410.201.81.255
6510.201.82.0/2910.201.82.1 – 10.201.82.610.201.82.7
6610.201.82.8/2910.201.82.9 – 10.201.82.1410.201.82.15
6710.201.82.16/2910.201.82.17 – 10.201.82.2210.201.82.23
6810.201.82.24/2910.201.82.25 – 10.201.82.3010.201.82.31
6910.201.82.32/2910.201.82.33 – 10.201.82.3810.201.82.39
7010.201.82.40/2910.201.82.41 – 10.201.82.4610.201.82.47
7110.201.82.48/2910.201.82.49 – 10.201.82.5410.201.82.55
7210.201.82.56/2910.201.82.57 – 10.201.82.6210.201.82.63
7310.201.82.64/2910.201.82.65 – 10.201.82.7010.201.82.71
7410.201.82.72/2910.201.82.73 – 10.201.82.7810.201.82.79
7510.201.82.80/2910.201.82.81 – 10.201.82.8610.201.82.87
7610.201.82.88/2910.201.82.89 – 10.201.82.9410.201.82.95
7710.201.82.96/2910.201.82.97 – 10.201.82.10210.201.82.103
7810.201.82.104/2910.201.82.105 – 10.201.82.11010.201.82.111
7910.201.82.112/2910.201.82.113 – 10.201.82.11810.201.82.119
8010.201.82.120/2910.201.82.121 – 10.201.82.12610.201.82.127
8110.201.82.128/2910.201.82.129 – 10.201.82.13410.201.82.135
8210.201.82.136/2910.201.82.137 – 10.201.82.14210.201.82.143
8310.201.82.144/2910.201.82.145 – 10.201.82.15010.201.82.151
8410.201.82.152/2910.201.82.153 – 10.201.82.15810.201.82.159
8510.201.82.160/2910.201.82.161 – 10.201.82.16610.201.82.167
8610.201.82.168/2910.201.82.169 – 10.201.82.17410.201.82.175
8710.201.82.176/2910.201.82.177 – 10.201.82.18210.201.82.183
8810.201.82.184/2910.201.82.185 – 10.201.82.19010.201.82.191
8910.201.82.192/2910.201.82.193 – 10.201.82.19810.201.82.199
9010.201.82.200/2910.201.82.201 – 10.201.82.20610.201.82.207
9110.201.82.208/2910.201.82.209 – 10.201.82.21410.201.82.215
9210.201.82.216/2910.201.82.217 – 10.201.82.22210.201.82.223
9310.201.82.224/2910.201.82.225 – 10.201.82.23010.201.82.231
9410.201.82.232/2910.201.82.233 – 10.201.82.23810.201.82.239
9510.201.82.240/2910.201.82.241 – 10.201.82.24610.201.82.247
9610.201.82.248/2910.201.82.249 – 10.201.82.25410.201.82.255
9710.201.83.0/2910.201.83.1 – 10.201.83.610.201.83.7
9810.201.83.8/2910.201.83.9 – 10.201.83.1410.201.83.15
9910.201.83.16/2910.201.83.17 – 10.201.83.2210.201.83.23
10010.201.83.24/2910.201.83.25 – 10.201.83.3010.201.83.31
10110.201.83.32/2910.201.83.33 – 10.201.83.3810.201.83.39
10210.201.83.40/2910.201.83.41 – 10.201.83.4610.201.83.47
10310.201.83.48/2910.201.83.49 – 10.201.83.5410.201.83.55
10410.201.83.56/2910.201.83.57 – 10.201.83.6210.201.83.63
10510.201.83.64/2910.201.83.65 – 10.201.83.7010.201.83.71
10610.201.83.72/2910.201.83.73 – 10.201.83.7810.201.83.79
10710.201.83.80/2910.201.83.81 – 10.201.83.8610.201.83.87
10810.201.83.88/2910.201.83.89 – 10.201.83.9410.201.83.95
10910.201.83.96/2910.201.83.97 – 10.201.83.10210.201.83.103
11010.201.83.104/2910.201.83.105 – 10.201.83.11010.201.83.111
11110.201.83.112/2910.201.83.113 – 10.201.83.11810.201.83.119
11210.201.83.120/2910.201.83.121 – 10.201.83.12610.201.83.127
11310.201.83.128/2910.201.83.129 – 10.201.83.13410.201.83.135
11410.201.83.136/2910.201.83.137 – 10.201.83.14210.201.83.143
11510.201.83.144/2910.201.83.145 – 10.201.83.15010.201.83.151
11610.201.83.152/2910.201.83.153 – 10.201.83.15810.201.83.159
11710.201.83.160/2910.201.83.161 – 10.201.83.16610.201.83.167
11810.201.83.168/2910.201.83.169 – 10.201.83.17410.201.83.175
11910.201.83.176/2910.201.83.177 – 10.201.83.18210.201.83.183
12010.201.83.184/2910.201.83.185 – 10.201.83.19010.201.83.191
12110.201.83.192/2910.201.83.193 – 10.201.83.19810.201.83.199
12210.201.83.200/2910.201.83.201 – 10.201.83.20610.201.83.207
12310.201.83.208/2910.201.83.209 – 10.201.83.21410.201.83.215
12410.201.83.216/2910.201.83.217 – 10.201.83.22210.201.83.223
12510.201.83.224/2910.201.83.225 – 10.201.83.23010.201.83.231
12610.201.83.232/2910.201.83.233 – 10.201.83.23810.201.83.239
12710.201.83.240/2910.201.83.241 – 10.201.83.24610.201.83.247
12810.201.83.248/2910.201.83.249 – 10.201.83.25410.201.83.255
12910.201.84.0/2910.201.84.1 – 10.201.84.610.201.84.7
13010.201.84.8/2910.201.84.9 – 10.201.84.1410.201.84.15
13110.201.84.16/2910.201.84.17 – 10.201.84.2210.201.84.23
13210.201.84.24/2910.201.84.25 – 10.201.84.3010.201.84.31
13310.201.84.32/2910.201.84.33 – 10.201.84.3810.201.84.39
13410.201.84.40/2910.201.84.41 – 10.201.84.4610.201.84.47
13510.201.84.48/2910.201.84.49 – 10.201.84.5410.201.84.55
13610.201.84.56/2910.201.84.57 – 10.201.84.6210.201.84.63
13710.201.84.64/2910.201.84.65 – 10.201.84.7010.201.84.71
13810.201.84.72/2910.201.84.73 – 10.201.84.7810.201.84.79
13910.201.84.80/2910.201.84.81 – 10.201.84.8610.201.84.87
14010.201.84.88/2910.201.84.89 – 10.201.84.9410.201.84.95
14110.201.84.96/2910.201.84.97 – 10.201.84.10210.201.84.103
14210.201.84.104/2910.201.84.105 – 10.201.84.11010.201.84.111
14310.201.84.112/2910.201.84.113 – 10.201.84.11810.201.84.119
14410.201.84.120/2910.201.84.121 – 10.201.84.12610.201.84.127
14510.201.84.128/2910.201.84.129 – 10.201.84.13410.201.84.135
14610.201.84.136/2910.201.84.137 – 10.201.84.14210.201.84.143
14710.201.84.144/2910.201.84.145 – 10.201.84.15010.201.84.151
14810.201.84.152/2910.201.84.153 – 10.201.84.15810.201.84.159
14910.201.84.160/2910.201.84.161 – 10.201.84.16610.201.84.167
15010.201.84.168/2910.201.84.169 – 10.201.84.17410.201.84.175
15110.201.84.176/2910.201.84.177 – 10.201.84.18210.201.84.183
15210.201.84.184/2910.201.84.185 – 10.201.84.19010.201.84.191
15310.201.84.192/2910.201.84.193 – 10.201.84.19810.201.84.199
15410.201.84.200/2910.201.84.201 – 10.201.84.20610.201.84.207
15510.201.84.208/2910.201.84.209 – 10.201.84.21410.201.84.215
15610.201.84.216/2910.201.84.217 – 10.201.84.22210.201.84.223
15710.201.84.224/2910.201.84.225 – 10.201.84.23010.201.84.231
15810.201.84.232/2910.201.84.233 – 10.201.84.23810.201.84.239
15910.201.84.240/2910.201.84.241 – 10.201.84.24610.201.84.247
16010.201.84.248/2910.201.84.249 – 10.201.84.25410.201.84.255
16110.201.85.0/2910.201.85.1 – 10.201.85.610.201.85.7
16210.201.85.8/2910.201.85.9 – 10.201.85.1410.201.85.15
16310.201.85.16/2910.201.85.17 – 10.201.85.2210.201.85.23
16410.201.85.24/2910.201.85.25 – 10.201.85.3010.201.85.31
16510.201.85.32/2910.201.85.33 – 10.201.85.3810.201.85.39
16610.201.85.40/2910.201.85.41 – 10.201.85.4610.201.85.47
16710.201.85.48/2910.201.85.49 – 10.201.85.5410.201.85.55
16810.201.85.56/2910.201.85.57 – 10.201.85.6210.201.85.63
16910.201.85.64/2910.201.85.65 – 10.201.85.7010.201.85.71
17010.201.85.72/2910.201.85.73 – 10.201.85.7810.201.85.79
17110.201.85.80/2910.201.85.81 – 10.201.85.8610.201.85.87
17210.201.85.88/2910.201.85.89 – 10.201.85.9410.201.85.95
17310.201.85.96/2910.201.85.97 – 10.201.85.10210.201.85.103
17410.201.85.104/2910.201.85.105 – 10.201.85.11010.201.85.111
17510.201.85.112/2910.201.85.113 – 10.201.85.11810.201.85.119
17610.201.85.120/2910.201.85.121 – 10.201.85.12610.201.85.127
17710.201.85.128/2910.201.85.129 – 10.201.85.13410.201.85.135
17810.201.85.136/2910.201.85.137 – 10.201.85.14210.201.85.143
17910.201.85.144/2910.201.85.145 – 10.201.85.15010.201.85.151
18010.201.85.152/2910.201.85.153 – 10.201.85.15810.201.85.159
18110.201.85.160/2910.201.85.161 – 10.201.85.16610.201.85.167
18210.201.85.168/2910.201.85.169 – 10.201.85.17410.201.85.175
18310.201.85.176/2910.201.85.177 – 10.201.85.18210.201.85.183
18410.201.85.184/2910.201.85.185 – 10.201.85.19010.201.85.191
18510.201.85.192/2910.201.85.193 – 10.201.85.19810.201.85.199
18610.201.85.200/2910.201.85.201 – 10.201.85.20610.201.85.207
18710.201.85.208/2910.201.85.209 – 10.201.85.21410.201.85.215
18810.201.85.216/2910.201.85.217 – 10.201.85.22210.201.85.223
18910.201.85.224/2910.201.85.225 – 10.201.85.23010.201.85.231
19010.201.85.232/2910.201.85.233 – 10.201.85.23810.201.85.239
19110.201.85.240/2910.201.85.241 – 10.201.85.24610.201.85.247
19210.201.85.248/2910.201.85.249 – 10.201.85.25410.201.85.255
19310.201.86.0/2910.201.86.1 – 10.201.86.610.201.86.7
19410.201.86.8/2910.201.86.9 – 10.201.86.1410.201.86.15
19510.201.86.16/2910.201.86.17 – 10.201.86.2210.201.86.23
19610.201.86.24/2910.201.86.25 – 10.201.86.3010.201.86.31
19710.201.86.32/2910.201.86.33 – 10.201.86.3810.201.86.39
19810.201.86.40/2910.201.86.41 – 10.201.86.4610.201.86.47
19910.201.86.48/2910.201.86.49 – 10.201.86.5410.201.86.55
20010.201.86.56/2910.201.86.57 – 10.201.86.6210.201.86.63
20110.201.86.64/2910.201.86.65 – 10.201.86.7010.201.86.71
20210.201.86.72/2910.201.86.73 – 10.201.86.7810.201.86.79
20310.201.86.80/2910.201.86.81 – 10.201.86.8610.201.86.87
20410.201.86.88/2910.201.86.89 – 10.201.86.9410.201.86.95
20510.201.86.96/2910.201.86.97 – 10.201.86.10210.201.86.103
20610.201.86.104/2910.201.86.105 – 10.201.86.11010.201.86.111
20710.201.86.112/2910.201.86.113 – 10.201.86.11810.201.86.119
20810.201.86.120/2910.201.86.121 – 10.201.86.12610.201.86.127
20910.201.86.128/2910.201.86.129 – 10.201.86.13410.201.86.135
21010.201.86.136/2910.201.86.137 – 10.201.86.14210.201.86.143
21110.201.86.144/2910.201.86.145 – 10.201.86.15010.201.86.151
21210.201.86.152/2910.201.86.153 – 10.201.86.15810.201.86.159
21310.201.86.160/2910.201.86.161 – 10.201.86.16610.201.86.167
21410.201.86.168/2910.201.86.169 – 10.201.86.17410.201.86.175
21510.201.86.176/2910.201.86.177 – 10.201.86.18210.201.86.183
21610.201.86.184/2910.201.86.185 – 10.201.86.19010.201.86.191
21710.201.86.192/2910.201.86.193 – 10.201.86.19810.201.86.199
21810.201.86.200/2910.201.86.201 – 10.201.86.20610.201.86.207
21910.201.86.208/2910.201.86.209 – 10.201.86.21410.201.86.215
22010.201.86.216/2910.201.86.217 – 10.201.86.22210.201.86.223
22110.201.86.224/2910.201.86.225 – 10.201.86.23010.201.86.231
22210.201.86.232/2910.201.86.233 – 10.201.86.23810.201.86.239
22310.201.86.240/2910.201.86.241 – 10.201.86.24610.201.86.247
22410.201.86.248/2910.201.86.249 – 10.201.86.25410.201.86.255
22510.201.87.0/2910.201.87.1 – 10.201.87.610.201.87.7
22610.201.87.8/2910.201.87.9 – 10.201.87.1410.201.87.15
22710.201.87.16/2910.201.87.17 – 10.201.87.2210.201.87.23
22810.201.87.24/2910.201.87.25 – 10.201.87.3010.201.87.31
22910.201.87.32/2910.201.87.33 – 10.201.87.3810.201.87.39
23010.201.87.40/2910.201.87.41 – 10.201.87.4610.201.87.47
23110.201.87.48/2910.201.87.49 – 10.201.87.5410.201.87.55
23210.201.87.56/2910.201.87.57 – 10.201.87.6210.201.87.63
23310.201.87.64/2910.201.87.65 – 10.201.87.7010.201.87.71
23410.201.87.72/2910.201.87.73 – 10.201.87.7810.201.87.79
23510.201.87.80/2910.201.87.81 – 10.201.87.8610.201.87.87
23610.201.87.88/2910.201.87.89 – 10.201.87.9410.201.87.95
23710.201.87.96/2910.201.87.97 – 10.201.87.10210.201.87.103
23810.201.87.104/2910.201.87.105 – 10.201.87.11010.201.87.111
23910.201.87.112/2910.201.87.113 – 10.201.87.11810.201.87.119
24010.201.87.120/2910.201.87.121 – 10.201.87.12610.201.87.127
24110.201.87.128/2910.201.87.129 – 10.201.87.13410.201.87.135
24210.201.87.136/2910.201.87.137 – 10.201.87.14210.201.87.143
24310.201.87.144/2910.201.87.145 – 10.201.87.15010.201.87.151
24410.201.87.152/2910.201.87.153 – 10.201.87.15810.201.87.159
24510.201.87.160/2910.201.87.161 – 10.201.87.16610.201.87.167
24610.201.87.168/2910.201.87.169 – 10.201.87.17410.201.87.175
24710.201.87.176/2910.201.87.177 – 10.201.87.18210.201.87.183
24810.201.87.184/2910.201.87.185 – 10.201.87.19010.201.87.191
24910.201.87.192/2910.201.87.193 – 10.201.87.19810.201.87.199
25010.201.87.200/2910.201.87.201 – 10.201.87.20610.201.87.207
25110.201.87.208/2910.201.87.209 – 10.201.87.21410.201.87.215
25210.201.87.216/2910.201.87.217 – 10.201.87.22210.201.87.223
25310.201.87.224/2910.201.87.225 – 10.201.87.23010.201.87.231
25410.201.87.232/2910.201.87.233 – 10.201.87.23810.201.87.239
25510.201.87.240/2910.201.87.241 – 10.201.87.24610.201.87.247
25610.201.87.248/2910.201.87.249 – 10.201.87.25410.201.87.255

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 /20
/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-
/20255.255.240.04,0964,0941
/21255.255.248.02,0482,0462 split →
/22255.255.252.01,0241,0224 split →
/23255.255.254.05125108 split →
/24255.255.255.025625416 split →
/25255.255.255.12812812632 split →
/26255.255.255.192646264 split →
/27255.255.255.2243230128 split →
/28255.255.255.2401614256 split →
/29255.255.255.24886512 split →
/30255.255.255.252421,024 split →
/31255.255.255.254222,048 split →
/32255.255.255.255114,096 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 →