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)10.78.80.0/20
network10.78.80.0/20
broadcast10.78.95.255
first host10.78.80.1
last host10.78.95.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.78.80.0/20
address00001010.01001110.01010000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.01001110.01010000.00000000
broadcast00001010.01001110.01011111.11111111
green = network part, grey = host part
hex0x0a4e5000
decimal172904448
reverse dns0.80.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:5000

/20 split into /28 · 256 subnets

close ×
#networkhost rangebroadcast
110.78.80.0/2810.78.80.1 – 10.78.80.1410.78.80.15
210.78.80.16/2810.78.80.17 – 10.78.80.3010.78.80.31
310.78.80.32/2810.78.80.33 – 10.78.80.4610.78.80.47
410.78.80.48/2810.78.80.49 – 10.78.80.6210.78.80.63
510.78.80.64/2810.78.80.65 – 10.78.80.7810.78.80.79
610.78.80.80/2810.78.80.81 – 10.78.80.9410.78.80.95
710.78.80.96/2810.78.80.97 – 10.78.80.11010.78.80.111
810.78.80.112/2810.78.80.113 – 10.78.80.12610.78.80.127
910.78.80.128/2810.78.80.129 – 10.78.80.14210.78.80.143
1010.78.80.144/2810.78.80.145 – 10.78.80.15810.78.80.159
1110.78.80.160/2810.78.80.161 – 10.78.80.17410.78.80.175
1210.78.80.176/2810.78.80.177 – 10.78.80.19010.78.80.191
1310.78.80.192/2810.78.80.193 – 10.78.80.20610.78.80.207
1410.78.80.208/2810.78.80.209 – 10.78.80.22210.78.80.223
1510.78.80.224/2810.78.80.225 – 10.78.80.23810.78.80.239
1610.78.80.240/2810.78.80.241 – 10.78.80.25410.78.80.255
1710.78.81.0/2810.78.81.1 – 10.78.81.1410.78.81.15
1810.78.81.16/2810.78.81.17 – 10.78.81.3010.78.81.31
1910.78.81.32/2810.78.81.33 – 10.78.81.4610.78.81.47
2010.78.81.48/2810.78.81.49 – 10.78.81.6210.78.81.63
2110.78.81.64/2810.78.81.65 – 10.78.81.7810.78.81.79
2210.78.81.80/2810.78.81.81 – 10.78.81.9410.78.81.95
2310.78.81.96/2810.78.81.97 – 10.78.81.11010.78.81.111
2410.78.81.112/2810.78.81.113 – 10.78.81.12610.78.81.127
2510.78.81.128/2810.78.81.129 – 10.78.81.14210.78.81.143
2610.78.81.144/2810.78.81.145 – 10.78.81.15810.78.81.159
2710.78.81.160/2810.78.81.161 – 10.78.81.17410.78.81.175
2810.78.81.176/2810.78.81.177 – 10.78.81.19010.78.81.191
2910.78.81.192/2810.78.81.193 – 10.78.81.20610.78.81.207
3010.78.81.208/2810.78.81.209 – 10.78.81.22210.78.81.223
3110.78.81.224/2810.78.81.225 – 10.78.81.23810.78.81.239
3210.78.81.240/2810.78.81.241 – 10.78.81.25410.78.81.255
3310.78.82.0/2810.78.82.1 – 10.78.82.1410.78.82.15
3410.78.82.16/2810.78.82.17 – 10.78.82.3010.78.82.31
3510.78.82.32/2810.78.82.33 – 10.78.82.4610.78.82.47
3610.78.82.48/2810.78.82.49 – 10.78.82.6210.78.82.63
3710.78.82.64/2810.78.82.65 – 10.78.82.7810.78.82.79
3810.78.82.80/2810.78.82.81 – 10.78.82.9410.78.82.95
3910.78.82.96/2810.78.82.97 – 10.78.82.11010.78.82.111
4010.78.82.112/2810.78.82.113 – 10.78.82.12610.78.82.127
4110.78.82.128/2810.78.82.129 – 10.78.82.14210.78.82.143
4210.78.82.144/2810.78.82.145 – 10.78.82.15810.78.82.159
4310.78.82.160/2810.78.82.161 – 10.78.82.17410.78.82.175
4410.78.82.176/2810.78.82.177 – 10.78.82.19010.78.82.191
4510.78.82.192/2810.78.82.193 – 10.78.82.20610.78.82.207
4610.78.82.208/2810.78.82.209 – 10.78.82.22210.78.82.223
4710.78.82.224/2810.78.82.225 – 10.78.82.23810.78.82.239
4810.78.82.240/2810.78.82.241 – 10.78.82.25410.78.82.255
4910.78.83.0/2810.78.83.1 – 10.78.83.1410.78.83.15
5010.78.83.16/2810.78.83.17 – 10.78.83.3010.78.83.31
5110.78.83.32/2810.78.83.33 – 10.78.83.4610.78.83.47
5210.78.83.48/2810.78.83.49 – 10.78.83.6210.78.83.63
5310.78.83.64/2810.78.83.65 – 10.78.83.7810.78.83.79
5410.78.83.80/2810.78.83.81 – 10.78.83.9410.78.83.95
5510.78.83.96/2810.78.83.97 – 10.78.83.11010.78.83.111
5610.78.83.112/2810.78.83.113 – 10.78.83.12610.78.83.127
5710.78.83.128/2810.78.83.129 – 10.78.83.14210.78.83.143
5810.78.83.144/2810.78.83.145 – 10.78.83.15810.78.83.159
5910.78.83.160/2810.78.83.161 – 10.78.83.17410.78.83.175
6010.78.83.176/2810.78.83.177 – 10.78.83.19010.78.83.191
6110.78.83.192/2810.78.83.193 – 10.78.83.20610.78.83.207
6210.78.83.208/2810.78.83.209 – 10.78.83.22210.78.83.223
6310.78.83.224/2810.78.83.225 – 10.78.83.23810.78.83.239
6410.78.83.240/2810.78.83.241 – 10.78.83.25410.78.83.255
6510.78.84.0/2810.78.84.1 – 10.78.84.1410.78.84.15
6610.78.84.16/2810.78.84.17 – 10.78.84.3010.78.84.31
6710.78.84.32/2810.78.84.33 – 10.78.84.4610.78.84.47
6810.78.84.48/2810.78.84.49 – 10.78.84.6210.78.84.63
6910.78.84.64/2810.78.84.65 – 10.78.84.7810.78.84.79
7010.78.84.80/2810.78.84.81 – 10.78.84.9410.78.84.95
7110.78.84.96/2810.78.84.97 – 10.78.84.11010.78.84.111
7210.78.84.112/2810.78.84.113 – 10.78.84.12610.78.84.127
7310.78.84.128/2810.78.84.129 – 10.78.84.14210.78.84.143
7410.78.84.144/2810.78.84.145 – 10.78.84.15810.78.84.159
7510.78.84.160/2810.78.84.161 – 10.78.84.17410.78.84.175
7610.78.84.176/2810.78.84.177 – 10.78.84.19010.78.84.191
7710.78.84.192/2810.78.84.193 – 10.78.84.20610.78.84.207
7810.78.84.208/2810.78.84.209 – 10.78.84.22210.78.84.223
7910.78.84.224/2810.78.84.225 – 10.78.84.23810.78.84.239
8010.78.84.240/2810.78.84.241 – 10.78.84.25410.78.84.255
8110.78.85.0/2810.78.85.1 – 10.78.85.1410.78.85.15
8210.78.85.16/2810.78.85.17 – 10.78.85.3010.78.85.31
8310.78.85.32/2810.78.85.33 – 10.78.85.4610.78.85.47
8410.78.85.48/2810.78.85.49 – 10.78.85.6210.78.85.63
8510.78.85.64/2810.78.85.65 – 10.78.85.7810.78.85.79
8610.78.85.80/2810.78.85.81 – 10.78.85.9410.78.85.95
8710.78.85.96/2810.78.85.97 – 10.78.85.11010.78.85.111
8810.78.85.112/2810.78.85.113 – 10.78.85.12610.78.85.127
8910.78.85.128/2810.78.85.129 – 10.78.85.14210.78.85.143
9010.78.85.144/2810.78.85.145 – 10.78.85.15810.78.85.159
9110.78.85.160/2810.78.85.161 – 10.78.85.17410.78.85.175
9210.78.85.176/2810.78.85.177 – 10.78.85.19010.78.85.191
9310.78.85.192/2810.78.85.193 – 10.78.85.20610.78.85.207
9410.78.85.208/2810.78.85.209 – 10.78.85.22210.78.85.223
9510.78.85.224/2810.78.85.225 – 10.78.85.23810.78.85.239
9610.78.85.240/2810.78.85.241 – 10.78.85.25410.78.85.255
9710.78.86.0/2810.78.86.1 – 10.78.86.1410.78.86.15
9810.78.86.16/2810.78.86.17 – 10.78.86.3010.78.86.31
9910.78.86.32/2810.78.86.33 – 10.78.86.4610.78.86.47
10010.78.86.48/2810.78.86.49 – 10.78.86.6210.78.86.63
10110.78.86.64/2810.78.86.65 – 10.78.86.7810.78.86.79
10210.78.86.80/2810.78.86.81 – 10.78.86.9410.78.86.95
10310.78.86.96/2810.78.86.97 – 10.78.86.11010.78.86.111
10410.78.86.112/2810.78.86.113 – 10.78.86.12610.78.86.127
10510.78.86.128/2810.78.86.129 – 10.78.86.14210.78.86.143
10610.78.86.144/2810.78.86.145 – 10.78.86.15810.78.86.159
10710.78.86.160/2810.78.86.161 – 10.78.86.17410.78.86.175
10810.78.86.176/2810.78.86.177 – 10.78.86.19010.78.86.191
10910.78.86.192/2810.78.86.193 – 10.78.86.20610.78.86.207
11010.78.86.208/2810.78.86.209 – 10.78.86.22210.78.86.223
11110.78.86.224/2810.78.86.225 – 10.78.86.23810.78.86.239
11210.78.86.240/2810.78.86.241 – 10.78.86.25410.78.86.255
11310.78.87.0/2810.78.87.1 – 10.78.87.1410.78.87.15
11410.78.87.16/2810.78.87.17 – 10.78.87.3010.78.87.31
11510.78.87.32/2810.78.87.33 – 10.78.87.4610.78.87.47
11610.78.87.48/2810.78.87.49 – 10.78.87.6210.78.87.63
11710.78.87.64/2810.78.87.65 – 10.78.87.7810.78.87.79
11810.78.87.80/2810.78.87.81 – 10.78.87.9410.78.87.95
11910.78.87.96/2810.78.87.97 – 10.78.87.11010.78.87.111
12010.78.87.112/2810.78.87.113 – 10.78.87.12610.78.87.127
12110.78.87.128/2810.78.87.129 – 10.78.87.14210.78.87.143
12210.78.87.144/2810.78.87.145 – 10.78.87.15810.78.87.159
12310.78.87.160/2810.78.87.161 – 10.78.87.17410.78.87.175
12410.78.87.176/2810.78.87.177 – 10.78.87.19010.78.87.191
12510.78.87.192/2810.78.87.193 – 10.78.87.20610.78.87.207
12610.78.87.208/2810.78.87.209 – 10.78.87.22210.78.87.223
12710.78.87.224/2810.78.87.225 – 10.78.87.23810.78.87.239
12810.78.87.240/2810.78.87.241 – 10.78.87.25410.78.87.255
12910.78.88.0/2810.78.88.1 – 10.78.88.1410.78.88.15
13010.78.88.16/2810.78.88.17 – 10.78.88.3010.78.88.31
13110.78.88.32/2810.78.88.33 – 10.78.88.4610.78.88.47
13210.78.88.48/2810.78.88.49 – 10.78.88.6210.78.88.63
13310.78.88.64/2810.78.88.65 – 10.78.88.7810.78.88.79
13410.78.88.80/2810.78.88.81 – 10.78.88.9410.78.88.95
13510.78.88.96/2810.78.88.97 – 10.78.88.11010.78.88.111
13610.78.88.112/2810.78.88.113 – 10.78.88.12610.78.88.127
13710.78.88.128/2810.78.88.129 – 10.78.88.14210.78.88.143
13810.78.88.144/2810.78.88.145 – 10.78.88.15810.78.88.159
13910.78.88.160/2810.78.88.161 – 10.78.88.17410.78.88.175
14010.78.88.176/2810.78.88.177 – 10.78.88.19010.78.88.191
14110.78.88.192/2810.78.88.193 – 10.78.88.20610.78.88.207
14210.78.88.208/2810.78.88.209 – 10.78.88.22210.78.88.223
14310.78.88.224/2810.78.88.225 – 10.78.88.23810.78.88.239
14410.78.88.240/2810.78.88.241 – 10.78.88.25410.78.88.255
14510.78.89.0/2810.78.89.1 – 10.78.89.1410.78.89.15
14610.78.89.16/2810.78.89.17 – 10.78.89.3010.78.89.31
14710.78.89.32/2810.78.89.33 – 10.78.89.4610.78.89.47
14810.78.89.48/2810.78.89.49 – 10.78.89.6210.78.89.63
14910.78.89.64/2810.78.89.65 – 10.78.89.7810.78.89.79
15010.78.89.80/2810.78.89.81 – 10.78.89.9410.78.89.95
15110.78.89.96/2810.78.89.97 – 10.78.89.11010.78.89.111
15210.78.89.112/2810.78.89.113 – 10.78.89.12610.78.89.127
15310.78.89.128/2810.78.89.129 – 10.78.89.14210.78.89.143
15410.78.89.144/2810.78.89.145 – 10.78.89.15810.78.89.159
15510.78.89.160/2810.78.89.161 – 10.78.89.17410.78.89.175
15610.78.89.176/2810.78.89.177 – 10.78.89.19010.78.89.191
15710.78.89.192/2810.78.89.193 – 10.78.89.20610.78.89.207
15810.78.89.208/2810.78.89.209 – 10.78.89.22210.78.89.223
15910.78.89.224/2810.78.89.225 – 10.78.89.23810.78.89.239
16010.78.89.240/2810.78.89.241 – 10.78.89.25410.78.89.255
16110.78.90.0/2810.78.90.1 – 10.78.90.1410.78.90.15
16210.78.90.16/2810.78.90.17 – 10.78.90.3010.78.90.31
16310.78.90.32/2810.78.90.33 – 10.78.90.4610.78.90.47
16410.78.90.48/2810.78.90.49 – 10.78.90.6210.78.90.63
16510.78.90.64/2810.78.90.65 – 10.78.90.7810.78.90.79
16610.78.90.80/2810.78.90.81 – 10.78.90.9410.78.90.95
16710.78.90.96/2810.78.90.97 – 10.78.90.11010.78.90.111
16810.78.90.112/2810.78.90.113 – 10.78.90.12610.78.90.127
16910.78.90.128/2810.78.90.129 – 10.78.90.14210.78.90.143
17010.78.90.144/2810.78.90.145 – 10.78.90.15810.78.90.159
17110.78.90.160/2810.78.90.161 – 10.78.90.17410.78.90.175
17210.78.90.176/2810.78.90.177 – 10.78.90.19010.78.90.191
17310.78.90.192/2810.78.90.193 – 10.78.90.20610.78.90.207
17410.78.90.208/2810.78.90.209 – 10.78.90.22210.78.90.223
17510.78.90.224/2810.78.90.225 – 10.78.90.23810.78.90.239
17610.78.90.240/2810.78.90.241 – 10.78.90.25410.78.90.255
17710.78.91.0/2810.78.91.1 – 10.78.91.1410.78.91.15
17810.78.91.16/2810.78.91.17 – 10.78.91.3010.78.91.31
17910.78.91.32/2810.78.91.33 – 10.78.91.4610.78.91.47
18010.78.91.48/2810.78.91.49 – 10.78.91.6210.78.91.63
18110.78.91.64/2810.78.91.65 – 10.78.91.7810.78.91.79
18210.78.91.80/2810.78.91.81 – 10.78.91.9410.78.91.95
18310.78.91.96/2810.78.91.97 – 10.78.91.11010.78.91.111
18410.78.91.112/2810.78.91.113 – 10.78.91.12610.78.91.127
18510.78.91.128/2810.78.91.129 – 10.78.91.14210.78.91.143
18610.78.91.144/2810.78.91.145 – 10.78.91.15810.78.91.159
18710.78.91.160/2810.78.91.161 – 10.78.91.17410.78.91.175
18810.78.91.176/2810.78.91.177 – 10.78.91.19010.78.91.191
18910.78.91.192/2810.78.91.193 – 10.78.91.20610.78.91.207
19010.78.91.208/2810.78.91.209 – 10.78.91.22210.78.91.223
19110.78.91.224/2810.78.91.225 – 10.78.91.23810.78.91.239
19210.78.91.240/2810.78.91.241 – 10.78.91.25410.78.91.255
19310.78.92.0/2810.78.92.1 – 10.78.92.1410.78.92.15
19410.78.92.16/2810.78.92.17 – 10.78.92.3010.78.92.31
19510.78.92.32/2810.78.92.33 – 10.78.92.4610.78.92.47
19610.78.92.48/2810.78.92.49 – 10.78.92.6210.78.92.63
19710.78.92.64/2810.78.92.65 – 10.78.92.7810.78.92.79
19810.78.92.80/2810.78.92.81 – 10.78.92.9410.78.92.95
19910.78.92.96/2810.78.92.97 – 10.78.92.11010.78.92.111
20010.78.92.112/2810.78.92.113 – 10.78.92.12610.78.92.127
20110.78.92.128/2810.78.92.129 – 10.78.92.14210.78.92.143
20210.78.92.144/2810.78.92.145 – 10.78.92.15810.78.92.159
20310.78.92.160/2810.78.92.161 – 10.78.92.17410.78.92.175
20410.78.92.176/2810.78.92.177 – 10.78.92.19010.78.92.191
20510.78.92.192/2810.78.92.193 – 10.78.92.20610.78.92.207
20610.78.92.208/2810.78.92.209 – 10.78.92.22210.78.92.223
20710.78.92.224/2810.78.92.225 – 10.78.92.23810.78.92.239
20810.78.92.240/2810.78.92.241 – 10.78.92.25410.78.92.255
20910.78.93.0/2810.78.93.1 – 10.78.93.1410.78.93.15
21010.78.93.16/2810.78.93.17 – 10.78.93.3010.78.93.31
21110.78.93.32/2810.78.93.33 – 10.78.93.4610.78.93.47
21210.78.93.48/2810.78.93.49 – 10.78.93.6210.78.93.63
21310.78.93.64/2810.78.93.65 – 10.78.93.7810.78.93.79
21410.78.93.80/2810.78.93.81 – 10.78.93.9410.78.93.95
21510.78.93.96/2810.78.93.97 – 10.78.93.11010.78.93.111
21610.78.93.112/2810.78.93.113 – 10.78.93.12610.78.93.127
21710.78.93.128/2810.78.93.129 – 10.78.93.14210.78.93.143
21810.78.93.144/2810.78.93.145 – 10.78.93.15810.78.93.159
21910.78.93.160/2810.78.93.161 – 10.78.93.17410.78.93.175
22010.78.93.176/2810.78.93.177 – 10.78.93.19010.78.93.191
22110.78.93.192/2810.78.93.193 – 10.78.93.20610.78.93.207
22210.78.93.208/2810.78.93.209 – 10.78.93.22210.78.93.223
22310.78.93.224/2810.78.93.225 – 10.78.93.23810.78.93.239
22410.78.93.240/2810.78.93.241 – 10.78.93.25410.78.93.255
22510.78.94.0/2810.78.94.1 – 10.78.94.1410.78.94.15
22610.78.94.16/2810.78.94.17 – 10.78.94.3010.78.94.31
22710.78.94.32/2810.78.94.33 – 10.78.94.4610.78.94.47
22810.78.94.48/2810.78.94.49 – 10.78.94.6210.78.94.63
22910.78.94.64/2810.78.94.65 – 10.78.94.7810.78.94.79
23010.78.94.80/2810.78.94.81 – 10.78.94.9410.78.94.95
23110.78.94.96/2810.78.94.97 – 10.78.94.11010.78.94.111
23210.78.94.112/2810.78.94.113 – 10.78.94.12610.78.94.127
23310.78.94.128/2810.78.94.129 – 10.78.94.14210.78.94.143
23410.78.94.144/2810.78.94.145 – 10.78.94.15810.78.94.159
23510.78.94.160/2810.78.94.161 – 10.78.94.17410.78.94.175
23610.78.94.176/2810.78.94.177 – 10.78.94.19010.78.94.191
23710.78.94.192/2810.78.94.193 – 10.78.94.20610.78.94.207
23810.78.94.208/2810.78.94.209 – 10.78.94.22210.78.94.223
23910.78.94.224/2810.78.94.225 – 10.78.94.23810.78.94.239
24010.78.94.240/2810.78.94.241 – 10.78.94.25410.78.94.255
24110.78.95.0/2810.78.95.1 – 10.78.95.1410.78.95.15
24210.78.95.16/2810.78.95.17 – 10.78.95.3010.78.95.31
24310.78.95.32/2810.78.95.33 – 10.78.95.4610.78.95.47
24410.78.95.48/2810.78.95.49 – 10.78.95.6210.78.95.63
24510.78.95.64/2810.78.95.65 – 10.78.95.7810.78.95.79
24610.78.95.80/2810.78.95.81 – 10.78.95.9410.78.95.95
24710.78.95.96/2810.78.95.97 – 10.78.95.11010.78.95.111
24810.78.95.112/2810.78.95.113 – 10.78.95.12610.78.95.127
24910.78.95.128/2810.78.95.129 – 10.78.95.14210.78.95.143
25010.78.95.144/2810.78.95.145 – 10.78.95.15810.78.95.159
25110.78.95.160/2810.78.95.161 – 10.78.95.17410.78.95.175
25210.78.95.176/2810.78.95.177 – 10.78.95.19010.78.95.191
25310.78.95.192/2810.78.95.193 – 10.78.95.20610.78.95.207
25410.78.95.208/2810.78.95.209 – 10.78.95.22210.78.95.223
25510.78.95.224/2810.78.95.225 – 10.78.95.23810.78.95.239
25610.78.95.240/2810.78.95.241 – 10.78.95.25410.78.95.255
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 →