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)10.12.48.0/20
network10.12.48.0/20
broadcast10.12.63.255
first host10.12.48.1
last host10.12.63.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.12.48.0/20
address00001010.00001100.00110000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001100.00110000.00000000
broadcast00001010.00001100.00111111.11111111
green = network part, grey = host part
hex0x0a0c3000
decimal168570880
reverse dns0.48.12.10.in-addr.arpa
ipv4-mapped::ffff:a0c:3000

/20 split into /28 · 256 subnets

close ×
#networkhost rangebroadcast
110.12.48.0/2810.12.48.1 – 10.12.48.1410.12.48.15
210.12.48.16/2810.12.48.17 – 10.12.48.3010.12.48.31
310.12.48.32/2810.12.48.33 – 10.12.48.4610.12.48.47
410.12.48.48/2810.12.48.49 – 10.12.48.6210.12.48.63
510.12.48.64/2810.12.48.65 – 10.12.48.7810.12.48.79
610.12.48.80/2810.12.48.81 – 10.12.48.9410.12.48.95
710.12.48.96/2810.12.48.97 – 10.12.48.11010.12.48.111
810.12.48.112/2810.12.48.113 – 10.12.48.12610.12.48.127
910.12.48.128/2810.12.48.129 – 10.12.48.14210.12.48.143
1010.12.48.144/2810.12.48.145 – 10.12.48.15810.12.48.159
1110.12.48.160/2810.12.48.161 – 10.12.48.17410.12.48.175
1210.12.48.176/2810.12.48.177 – 10.12.48.19010.12.48.191
1310.12.48.192/2810.12.48.193 – 10.12.48.20610.12.48.207
1410.12.48.208/2810.12.48.209 – 10.12.48.22210.12.48.223
1510.12.48.224/2810.12.48.225 – 10.12.48.23810.12.48.239
1610.12.48.240/2810.12.48.241 – 10.12.48.25410.12.48.255
1710.12.49.0/2810.12.49.1 – 10.12.49.1410.12.49.15
1810.12.49.16/2810.12.49.17 – 10.12.49.3010.12.49.31
1910.12.49.32/2810.12.49.33 – 10.12.49.4610.12.49.47
2010.12.49.48/2810.12.49.49 – 10.12.49.6210.12.49.63
2110.12.49.64/2810.12.49.65 – 10.12.49.7810.12.49.79
2210.12.49.80/2810.12.49.81 – 10.12.49.9410.12.49.95
2310.12.49.96/2810.12.49.97 – 10.12.49.11010.12.49.111
2410.12.49.112/2810.12.49.113 – 10.12.49.12610.12.49.127
2510.12.49.128/2810.12.49.129 – 10.12.49.14210.12.49.143
2610.12.49.144/2810.12.49.145 – 10.12.49.15810.12.49.159
2710.12.49.160/2810.12.49.161 – 10.12.49.17410.12.49.175
2810.12.49.176/2810.12.49.177 – 10.12.49.19010.12.49.191
2910.12.49.192/2810.12.49.193 – 10.12.49.20610.12.49.207
3010.12.49.208/2810.12.49.209 – 10.12.49.22210.12.49.223
3110.12.49.224/2810.12.49.225 – 10.12.49.23810.12.49.239
3210.12.49.240/2810.12.49.241 – 10.12.49.25410.12.49.255
3310.12.50.0/2810.12.50.1 – 10.12.50.1410.12.50.15
3410.12.50.16/2810.12.50.17 – 10.12.50.3010.12.50.31
3510.12.50.32/2810.12.50.33 – 10.12.50.4610.12.50.47
3610.12.50.48/2810.12.50.49 – 10.12.50.6210.12.50.63
3710.12.50.64/2810.12.50.65 – 10.12.50.7810.12.50.79
3810.12.50.80/2810.12.50.81 – 10.12.50.9410.12.50.95
3910.12.50.96/2810.12.50.97 – 10.12.50.11010.12.50.111
4010.12.50.112/2810.12.50.113 – 10.12.50.12610.12.50.127
4110.12.50.128/2810.12.50.129 – 10.12.50.14210.12.50.143
4210.12.50.144/2810.12.50.145 – 10.12.50.15810.12.50.159
4310.12.50.160/2810.12.50.161 – 10.12.50.17410.12.50.175
4410.12.50.176/2810.12.50.177 – 10.12.50.19010.12.50.191
4510.12.50.192/2810.12.50.193 – 10.12.50.20610.12.50.207
4610.12.50.208/2810.12.50.209 – 10.12.50.22210.12.50.223
4710.12.50.224/2810.12.50.225 – 10.12.50.23810.12.50.239
4810.12.50.240/2810.12.50.241 – 10.12.50.25410.12.50.255
4910.12.51.0/2810.12.51.1 – 10.12.51.1410.12.51.15
5010.12.51.16/2810.12.51.17 – 10.12.51.3010.12.51.31
5110.12.51.32/2810.12.51.33 – 10.12.51.4610.12.51.47
5210.12.51.48/2810.12.51.49 – 10.12.51.6210.12.51.63
5310.12.51.64/2810.12.51.65 – 10.12.51.7810.12.51.79
5410.12.51.80/2810.12.51.81 – 10.12.51.9410.12.51.95
5510.12.51.96/2810.12.51.97 – 10.12.51.11010.12.51.111
5610.12.51.112/2810.12.51.113 – 10.12.51.12610.12.51.127
5710.12.51.128/2810.12.51.129 – 10.12.51.14210.12.51.143
5810.12.51.144/2810.12.51.145 – 10.12.51.15810.12.51.159
5910.12.51.160/2810.12.51.161 – 10.12.51.17410.12.51.175
6010.12.51.176/2810.12.51.177 – 10.12.51.19010.12.51.191
6110.12.51.192/2810.12.51.193 – 10.12.51.20610.12.51.207
6210.12.51.208/2810.12.51.209 – 10.12.51.22210.12.51.223
6310.12.51.224/2810.12.51.225 – 10.12.51.23810.12.51.239
6410.12.51.240/2810.12.51.241 – 10.12.51.25410.12.51.255
6510.12.52.0/2810.12.52.1 – 10.12.52.1410.12.52.15
6610.12.52.16/2810.12.52.17 – 10.12.52.3010.12.52.31
6710.12.52.32/2810.12.52.33 – 10.12.52.4610.12.52.47
6810.12.52.48/2810.12.52.49 – 10.12.52.6210.12.52.63
6910.12.52.64/2810.12.52.65 – 10.12.52.7810.12.52.79
7010.12.52.80/2810.12.52.81 – 10.12.52.9410.12.52.95
7110.12.52.96/2810.12.52.97 – 10.12.52.11010.12.52.111
7210.12.52.112/2810.12.52.113 – 10.12.52.12610.12.52.127
7310.12.52.128/2810.12.52.129 – 10.12.52.14210.12.52.143
7410.12.52.144/2810.12.52.145 – 10.12.52.15810.12.52.159
7510.12.52.160/2810.12.52.161 – 10.12.52.17410.12.52.175
7610.12.52.176/2810.12.52.177 – 10.12.52.19010.12.52.191
7710.12.52.192/2810.12.52.193 – 10.12.52.20610.12.52.207
7810.12.52.208/2810.12.52.209 – 10.12.52.22210.12.52.223
7910.12.52.224/2810.12.52.225 – 10.12.52.23810.12.52.239
8010.12.52.240/2810.12.52.241 – 10.12.52.25410.12.52.255
8110.12.53.0/2810.12.53.1 – 10.12.53.1410.12.53.15
8210.12.53.16/2810.12.53.17 – 10.12.53.3010.12.53.31
8310.12.53.32/2810.12.53.33 – 10.12.53.4610.12.53.47
8410.12.53.48/2810.12.53.49 – 10.12.53.6210.12.53.63
8510.12.53.64/2810.12.53.65 – 10.12.53.7810.12.53.79
8610.12.53.80/2810.12.53.81 – 10.12.53.9410.12.53.95
8710.12.53.96/2810.12.53.97 – 10.12.53.11010.12.53.111
8810.12.53.112/2810.12.53.113 – 10.12.53.12610.12.53.127
8910.12.53.128/2810.12.53.129 – 10.12.53.14210.12.53.143
9010.12.53.144/2810.12.53.145 – 10.12.53.15810.12.53.159
9110.12.53.160/2810.12.53.161 – 10.12.53.17410.12.53.175
9210.12.53.176/2810.12.53.177 – 10.12.53.19010.12.53.191
9310.12.53.192/2810.12.53.193 – 10.12.53.20610.12.53.207
9410.12.53.208/2810.12.53.209 – 10.12.53.22210.12.53.223
9510.12.53.224/2810.12.53.225 – 10.12.53.23810.12.53.239
9610.12.53.240/2810.12.53.241 – 10.12.53.25410.12.53.255
9710.12.54.0/2810.12.54.1 – 10.12.54.1410.12.54.15
9810.12.54.16/2810.12.54.17 – 10.12.54.3010.12.54.31
9910.12.54.32/2810.12.54.33 – 10.12.54.4610.12.54.47
10010.12.54.48/2810.12.54.49 – 10.12.54.6210.12.54.63
10110.12.54.64/2810.12.54.65 – 10.12.54.7810.12.54.79
10210.12.54.80/2810.12.54.81 – 10.12.54.9410.12.54.95
10310.12.54.96/2810.12.54.97 – 10.12.54.11010.12.54.111
10410.12.54.112/2810.12.54.113 – 10.12.54.12610.12.54.127
10510.12.54.128/2810.12.54.129 – 10.12.54.14210.12.54.143
10610.12.54.144/2810.12.54.145 – 10.12.54.15810.12.54.159
10710.12.54.160/2810.12.54.161 – 10.12.54.17410.12.54.175
10810.12.54.176/2810.12.54.177 – 10.12.54.19010.12.54.191
10910.12.54.192/2810.12.54.193 – 10.12.54.20610.12.54.207
11010.12.54.208/2810.12.54.209 – 10.12.54.22210.12.54.223
11110.12.54.224/2810.12.54.225 – 10.12.54.23810.12.54.239
11210.12.54.240/2810.12.54.241 – 10.12.54.25410.12.54.255
11310.12.55.0/2810.12.55.1 – 10.12.55.1410.12.55.15
11410.12.55.16/2810.12.55.17 – 10.12.55.3010.12.55.31
11510.12.55.32/2810.12.55.33 – 10.12.55.4610.12.55.47
11610.12.55.48/2810.12.55.49 – 10.12.55.6210.12.55.63
11710.12.55.64/2810.12.55.65 – 10.12.55.7810.12.55.79
11810.12.55.80/2810.12.55.81 – 10.12.55.9410.12.55.95
11910.12.55.96/2810.12.55.97 – 10.12.55.11010.12.55.111
12010.12.55.112/2810.12.55.113 – 10.12.55.12610.12.55.127
12110.12.55.128/2810.12.55.129 – 10.12.55.14210.12.55.143
12210.12.55.144/2810.12.55.145 – 10.12.55.15810.12.55.159
12310.12.55.160/2810.12.55.161 – 10.12.55.17410.12.55.175
12410.12.55.176/2810.12.55.177 – 10.12.55.19010.12.55.191
12510.12.55.192/2810.12.55.193 – 10.12.55.20610.12.55.207
12610.12.55.208/2810.12.55.209 – 10.12.55.22210.12.55.223
12710.12.55.224/2810.12.55.225 – 10.12.55.23810.12.55.239
12810.12.55.240/2810.12.55.241 – 10.12.55.25410.12.55.255
12910.12.56.0/2810.12.56.1 – 10.12.56.1410.12.56.15
13010.12.56.16/2810.12.56.17 – 10.12.56.3010.12.56.31
13110.12.56.32/2810.12.56.33 – 10.12.56.4610.12.56.47
13210.12.56.48/2810.12.56.49 – 10.12.56.6210.12.56.63
13310.12.56.64/2810.12.56.65 – 10.12.56.7810.12.56.79
13410.12.56.80/2810.12.56.81 – 10.12.56.9410.12.56.95
13510.12.56.96/2810.12.56.97 – 10.12.56.11010.12.56.111
13610.12.56.112/2810.12.56.113 – 10.12.56.12610.12.56.127
13710.12.56.128/2810.12.56.129 – 10.12.56.14210.12.56.143
13810.12.56.144/2810.12.56.145 – 10.12.56.15810.12.56.159
13910.12.56.160/2810.12.56.161 – 10.12.56.17410.12.56.175
14010.12.56.176/2810.12.56.177 – 10.12.56.19010.12.56.191
14110.12.56.192/2810.12.56.193 – 10.12.56.20610.12.56.207
14210.12.56.208/2810.12.56.209 – 10.12.56.22210.12.56.223
14310.12.56.224/2810.12.56.225 – 10.12.56.23810.12.56.239
14410.12.56.240/2810.12.56.241 – 10.12.56.25410.12.56.255
14510.12.57.0/2810.12.57.1 – 10.12.57.1410.12.57.15
14610.12.57.16/2810.12.57.17 – 10.12.57.3010.12.57.31
14710.12.57.32/2810.12.57.33 – 10.12.57.4610.12.57.47
14810.12.57.48/2810.12.57.49 – 10.12.57.6210.12.57.63
14910.12.57.64/2810.12.57.65 – 10.12.57.7810.12.57.79
15010.12.57.80/2810.12.57.81 – 10.12.57.9410.12.57.95
15110.12.57.96/2810.12.57.97 – 10.12.57.11010.12.57.111
15210.12.57.112/2810.12.57.113 – 10.12.57.12610.12.57.127
15310.12.57.128/2810.12.57.129 – 10.12.57.14210.12.57.143
15410.12.57.144/2810.12.57.145 – 10.12.57.15810.12.57.159
15510.12.57.160/2810.12.57.161 – 10.12.57.17410.12.57.175
15610.12.57.176/2810.12.57.177 – 10.12.57.19010.12.57.191
15710.12.57.192/2810.12.57.193 – 10.12.57.20610.12.57.207
15810.12.57.208/2810.12.57.209 – 10.12.57.22210.12.57.223
15910.12.57.224/2810.12.57.225 – 10.12.57.23810.12.57.239
16010.12.57.240/2810.12.57.241 – 10.12.57.25410.12.57.255
16110.12.58.0/2810.12.58.1 – 10.12.58.1410.12.58.15
16210.12.58.16/2810.12.58.17 – 10.12.58.3010.12.58.31
16310.12.58.32/2810.12.58.33 – 10.12.58.4610.12.58.47
16410.12.58.48/2810.12.58.49 – 10.12.58.6210.12.58.63
16510.12.58.64/2810.12.58.65 – 10.12.58.7810.12.58.79
16610.12.58.80/2810.12.58.81 – 10.12.58.9410.12.58.95
16710.12.58.96/2810.12.58.97 – 10.12.58.11010.12.58.111
16810.12.58.112/2810.12.58.113 – 10.12.58.12610.12.58.127
16910.12.58.128/2810.12.58.129 – 10.12.58.14210.12.58.143
17010.12.58.144/2810.12.58.145 – 10.12.58.15810.12.58.159
17110.12.58.160/2810.12.58.161 – 10.12.58.17410.12.58.175
17210.12.58.176/2810.12.58.177 – 10.12.58.19010.12.58.191
17310.12.58.192/2810.12.58.193 – 10.12.58.20610.12.58.207
17410.12.58.208/2810.12.58.209 – 10.12.58.22210.12.58.223
17510.12.58.224/2810.12.58.225 – 10.12.58.23810.12.58.239
17610.12.58.240/2810.12.58.241 – 10.12.58.25410.12.58.255
17710.12.59.0/2810.12.59.1 – 10.12.59.1410.12.59.15
17810.12.59.16/2810.12.59.17 – 10.12.59.3010.12.59.31
17910.12.59.32/2810.12.59.33 – 10.12.59.4610.12.59.47
18010.12.59.48/2810.12.59.49 – 10.12.59.6210.12.59.63
18110.12.59.64/2810.12.59.65 – 10.12.59.7810.12.59.79
18210.12.59.80/2810.12.59.81 – 10.12.59.9410.12.59.95
18310.12.59.96/2810.12.59.97 – 10.12.59.11010.12.59.111
18410.12.59.112/2810.12.59.113 – 10.12.59.12610.12.59.127
18510.12.59.128/2810.12.59.129 – 10.12.59.14210.12.59.143
18610.12.59.144/2810.12.59.145 – 10.12.59.15810.12.59.159
18710.12.59.160/2810.12.59.161 – 10.12.59.17410.12.59.175
18810.12.59.176/2810.12.59.177 – 10.12.59.19010.12.59.191
18910.12.59.192/2810.12.59.193 – 10.12.59.20610.12.59.207
19010.12.59.208/2810.12.59.209 – 10.12.59.22210.12.59.223
19110.12.59.224/2810.12.59.225 – 10.12.59.23810.12.59.239
19210.12.59.240/2810.12.59.241 – 10.12.59.25410.12.59.255
19310.12.60.0/2810.12.60.1 – 10.12.60.1410.12.60.15
19410.12.60.16/2810.12.60.17 – 10.12.60.3010.12.60.31
19510.12.60.32/2810.12.60.33 – 10.12.60.4610.12.60.47
19610.12.60.48/2810.12.60.49 – 10.12.60.6210.12.60.63
19710.12.60.64/2810.12.60.65 – 10.12.60.7810.12.60.79
19810.12.60.80/2810.12.60.81 – 10.12.60.9410.12.60.95
19910.12.60.96/2810.12.60.97 – 10.12.60.11010.12.60.111
20010.12.60.112/2810.12.60.113 – 10.12.60.12610.12.60.127
20110.12.60.128/2810.12.60.129 – 10.12.60.14210.12.60.143
20210.12.60.144/2810.12.60.145 – 10.12.60.15810.12.60.159
20310.12.60.160/2810.12.60.161 – 10.12.60.17410.12.60.175
20410.12.60.176/2810.12.60.177 – 10.12.60.19010.12.60.191
20510.12.60.192/2810.12.60.193 – 10.12.60.20610.12.60.207
20610.12.60.208/2810.12.60.209 – 10.12.60.22210.12.60.223
20710.12.60.224/2810.12.60.225 – 10.12.60.23810.12.60.239
20810.12.60.240/2810.12.60.241 – 10.12.60.25410.12.60.255
20910.12.61.0/2810.12.61.1 – 10.12.61.1410.12.61.15
21010.12.61.16/2810.12.61.17 – 10.12.61.3010.12.61.31
21110.12.61.32/2810.12.61.33 – 10.12.61.4610.12.61.47
21210.12.61.48/2810.12.61.49 – 10.12.61.6210.12.61.63
21310.12.61.64/2810.12.61.65 – 10.12.61.7810.12.61.79
21410.12.61.80/2810.12.61.81 – 10.12.61.9410.12.61.95
21510.12.61.96/2810.12.61.97 – 10.12.61.11010.12.61.111
21610.12.61.112/2810.12.61.113 – 10.12.61.12610.12.61.127
21710.12.61.128/2810.12.61.129 – 10.12.61.14210.12.61.143
21810.12.61.144/2810.12.61.145 – 10.12.61.15810.12.61.159
21910.12.61.160/2810.12.61.161 – 10.12.61.17410.12.61.175
22010.12.61.176/2810.12.61.177 – 10.12.61.19010.12.61.191
22110.12.61.192/2810.12.61.193 – 10.12.61.20610.12.61.207
22210.12.61.208/2810.12.61.209 – 10.12.61.22210.12.61.223
22310.12.61.224/2810.12.61.225 – 10.12.61.23810.12.61.239
22410.12.61.240/2810.12.61.241 – 10.12.61.25410.12.61.255
22510.12.62.0/2810.12.62.1 – 10.12.62.1410.12.62.15
22610.12.62.16/2810.12.62.17 – 10.12.62.3010.12.62.31
22710.12.62.32/2810.12.62.33 – 10.12.62.4610.12.62.47
22810.12.62.48/2810.12.62.49 – 10.12.62.6210.12.62.63
22910.12.62.64/2810.12.62.65 – 10.12.62.7810.12.62.79
23010.12.62.80/2810.12.62.81 – 10.12.62.9410.12.62.95
23110.12.62.96/2810.12.62.97 – 10.12.62.11010.12.62.111
23210.12.62.112/2810.12.62.113 – 10.12.62.12610.12.62.127
23310.12.62.128/2810.12.62.129 – 10.12.62.14210.12.62.143
23410.12.62.144/2810.12.62.145 – 10.12.62.15810.12.62.159
23510.12.62.160/2810.12.62.161 – 10.12.62.17410.12.62.175
23610.12.62.176/2810.12.62.177 – 10.12.62.19010.12.62.191
23710.12.62.192/2810.12.62.193 – 10.12.62.20610.12.62.207
23810.12.62.208/2810.12.62.209 – 10.12.62.22210.12.62.223
23910.12.62.224/2810.12.62.225 – 10.12.62.23810.12.62.239
24010.12.62.240/2810.12.62.241 – 10.12.62.25410.12.62.255
24110.12.63.0/2810.12.63.1 – 10.12.63.1410.12.63.15
24210.12.63.16/2810.12.63.17 – 10.12.63.3010.12.63.31
24310.12.63.32/2810.12.63.33 – 10.12.63.4610.12.63.47
24410.12.63.48/2810.12.63.49 – 10.12.63.6210.12.63.63
24510.12.63.64/2810.12.63.65 – 10.12.63.7810.12.63.79
24610.12.63.80/2810.12.63.81 – 10.12.63.9410.12.63.95
24710.12.63.96/2810.12.63.97 – 10.12.63.11010.12.63.111
24810.12.63.112/2810.12.63.113 – 10.12.63.12610.12.63.127
24910.12.63.128/2810.12.63.129 – 10.12.63.14210.12.63.143
25010.12.63.144/2810.12.63.145 – 10.12.63.15810.12.63.159
25110.12.63.160/2810.12.63.161 – 10.12.63.17410.12.63.175
25210.12.63.176/2810.12.63.177 – 10.12.63.19010.12.63.191
25310.12.63.192/2810.12.63.193 – 10.12.63.20610.12.63.207
25410.12.63.208/2810.12.63.209 – 10.12.63.22210.12.63.223
25510.12.63.224/2810.12.63.225 – 10.12.63.23810.12.63.239
25610.12.63.240/2810.12.63.241 – 10.12.63.25410.12.63.255
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 →