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)10.13.208.0/20
network10.13.208.0/20
broadcast10.13.223.255
first host10.13.208.1
last host10.13.223.254
subnet mask255.255.240.0
wildcard0.0.15.255
addresses4,096
usable hosts4,094
classA
ipcalc 10.13.208.0/20
address00001010.00001101.11010000.00000000
subnet mask11111111.11111111.11110000.00000000
network00001010.00001101.11010000.00000000
broadcast00001010.00001101.11011111.11111111
green = network part, grey = host part
hex0x0a0dd000
decimal168677376
reverse dns0.208.13.10.in-addr.arpa
ipv4-mapped::ffff:a0d:d000

/20 split into /28 · 256 subnets

close ×
#networkhost rangebroadcast
110.13.208.0/2810.13.208.1 – 10.13.208.1410.13.208.15
210.13.208.16/2810.13.208.17 – 10.13.208.3010.13.208.31
310.13.208.32/2810.13.208.33 – 10.13.208.4610.13.208.47
410.13.208.48/2810.13.208.49 – 10.13.208.6210.13.208.63
510.13.208.64/2810.13.208.65 – 10.13.208.7810.13.208.79
610.13.208.80/2810.13.208.81 – 10.13.208.9410.13.208.95
710.13.208.96/2810.13.208.97 – 10.13.208.11010.13.208.111
810.13.208.112/2810.13.208.113 – 10.13.208.12610.13.208.127
910.13.208.128/2810.13.208.129 – 10.13.208.14210.13.208.143
1010.13.208.144/2810.13.208.145 – 10.13.208.15810.13.208.159
1110.13.208.160/2810.13.208.161 – 10.13.208.17410.13.208.175
1210.13.208.176/2810.13.208.177 – 10.13.208.19010.13.208.191
1310.13.208.192/2810.13.208.193 – 10.13.208.20610.13.208.207
1410.13.208.208/2810.13.208.209 – 10.13.208.22210.13.208.223
1510.13.208.224/2810.13.208.225 – 10.13.208.23810.13.208.239
1610.13.208.240/2810.13.208.241 – 10.13.208.25410.13.208.255
1710.13.209.0/2810.13.209.1 – 10.13.209.1410.13.209.15
1810.13.209.16/2810.13.209.17 – 10.13.209.3010.13.209.31
1910.13.209.32/2810.13.209.33 – 10.13.209.4610.13.209.47
2010.13.209.48/2810.13.209.49 – 10.13.209.6210.13.209.63
2110.13.209.64/2810.13.209.65 – 10.13.209.7810.13.209.79
2210.13.209.80/2810.13.209.81 – 10.13.209.9410.13.209.95
2310.13.209.96/2810.13.209.97 – 10.13.209.11010.13.209.111
2410.13.209.112/2810.13.209.113 – 10.13.209.12610.13.209.127
2510.13.209.128/2810.13.209.129 – 10.13.209.14210.13.209.143
2610.13.209.144/2810.13.209.145 – 10.13.209.15810.13.209.159
2710.13.209.160/2810.13.209.161 – 10.13.209.17410.13.209.175
2810.13.209.176/2810.13.209.177 – 10.13.209.19010.13.209.191
2910.13.209.192/2810.13.209.193 – 10.13.209.20610.13.209.207
3010.13.209.208/2810.13.209.209 – 10.13.209.22210.13.209.223
3110.13.209.224/2810.13.209.225 – 10.13.209.23810.13.209.239
3210.13.209.240/2810.13.209.241 – 10.13.209.25410.13.209.255
3310.13.210.0/2810.13.210.1 – 10.13.210.1410.13.210.15
3410.13.210.16/2810.13.210.17 – 10.13.210.3010.13.210.31
3510.13.210.32/2810.13.210.33 – 10.13.210.4610.13.210.47
3610.13.210.48/2810.13.210.49 – 10.13.210.6210.13.210.63
3710.13.210.64/2810.13.210.65 – 10.13.210.7810.13.210.79
3810.13.210.80/2810.13.210.81 – 10.13.210.9410.13.210.95
3910.13.210.96/2810.13.210.97 – 10.13.210.11010.13.210.111
4010.13.210.112/2810.13.210.113 – 10.13.210.12610.13.210.127
4110.13.210.128/2810.13.210.129 – 10.13.210.14210.13.210.143
4210.13.210.144/2810.13.210.145 – 10.13.210.15810.13.210.159
4310.13.210.160/2810.13.210.161 – 10.13.210.17410.13.210.175
4410.13.210.176/2810.13.210.177 – 10.13.210.19010.13.210.191
4510.13.210.192/2810.13.210.193 – 10.13.210.20610.13.210.207
4610.13.210.208/2810.13.210.209 – 10.13.210.22210.13.210.223
4710.13.210.224/2810.13.210.225 – 10.13.210.23810.13.210.239
4810.13.210.240/2810.13.210.241 – 10.13.210.25410.13.210.255
4910.13.211.0/2810.13.211.1 – 10.13.211.1410.13.211.15
5010.13.211.16/2810.13.211.17 – 10.13.211.3010.13.211.31
5110.13.211.32/2810.13.211.33 – 10.13.211.4610.13.211.47
5210.13.211.48/2810.13.211.49 – 10.13.211.6210.13.211.63
5310.13.211.64/2810.13.211.65 – 10.13.211.7810.13.211.79
5410.13.211.80/2810.13.211.81 – 10.13.211.9410.13.211.95
5510.13.211.96/2810.13.211.97 – 10.13.211.11010.13.211.111
5610.13.211.112/2810.13.211.113 – 10.13.211.12610.13.211.127
5710.13.211.128/2810.13.211.129 – 10.13.211.14210.13.211.143
5810.13.211.144/2810.13.211.145 – 10.13.211.15810.13.211.159
5910.13.211.160/2810.13.211.161 – 10.13.211.17410.13.211.175
6010.13.211.176/2810.13.211.177 – 10.13.211.19010.13.211.191
6110.13.211.192/2810.13.211.193 – 10.13.211.20610.13.211.207
6210.13.211.208/2810.13.211.209 – 10.13.211.22210.13.211.223
6310.13.211.224/2810.13.211.225 – 10.13.211.23810.13.211.239
6410.13.211.240/2810.13.211.241 – 10.13.211.25410.13.211.255
6510.13.212.0/2810.13.212.1 – 10.13.212.1410.13.212.15
6610.13.212.16/2810.13.212.17 – 10.13.212.3010.13.212.31
6710.13.212.32/2810.13.212.33 – 10.13.212.4610.13.212.47
6810.13.212.48/2810.13.212.49 – 10.13.212.6210.13.212.63
6910.13.212.64/2810.13.212.65 – 10.13.212.7810.13.212.79
7010.13.212.80/2810.13.212.81 – 10.13.212.9410.13.212.95
7110.13.212.96/2810.13.212.97 – 10.13.212.11010.13.212.111
7210.13.212.112/2810.13.212.113 – 10.13.212.12610.13.212.127
7310.13.212.128/2810.13.212.129 – 10.13.212.14210.13.212.143
7410.13.212.144/2810.13.212.145 – 10.13.212.15810.13.212.159
7510.13.212.160/2810.13.212.161 – 10.13.212.17410.13.212.175
7610.13.212.176/2810.13.212.177 – 10.13.212.19010.13.212.191
7710.13.212.192/2810.13.212.193 – 10.13.212.20610.13.212.207
7810.13.212.208/2810.13.212.209 – 10.13.212.22210.13.212.223
7910.13.212.224/2810.13.212.225 – 10.13.212.23810.13.212.239
8010.13.212.240/2810.13.212.241 – 10.13.212.25410.13.212.255
8110.13.213.0/2810.13.213.1 – 10.13.213.1410.13.213.15
8210.13.213.16/2810.13.213.17 – 10.13.213.3010.13.213.31
8310.13.213.32/2810.13.213.33 – 10.13.213.4610.13.213.47
8410.13.213.48/2810.13.213.49 – 10.13.213.6210.13.213.63
8510.13.213.64/2810.13.213.65 – 10.13.213.7810.13.213.79
8610.13.213.80/2810.13.213.81 – 10.13.213.9410.13.213.95
8710.13.213.96/2810.13.213.97 – 10.13.213.11010.13.213.111
8810.13.213.112/2810.13.213.113 – 10.13.213.12610.13.213.127
8910.13.213.128/2810.13.213.129 – 10.13.213.14210.13.213.143
9010.13.213.144/2810.13.213.145 – 10.13.213.15810.13.213.159
9110.13.213.160/2810.13.213.161 – 10.13.213.17410.13.213.175
9210.13.213.176/2810.13.213.177 – 10.13.213.19010.13.213.191
9310.13.213.192/2810.13.213.193 – 10.13.213.20610.13.213.207
9410.13.213.208/2810.13.213.209 – 10.13.213.22210.13.213.223
9510.13.213.224/2810.13.213.225 – 10.13.213.23810.13.213.239
9610.13.213.240/2810.13.213.241 – 10.13.213.25410.13.213.255
9710.13.214.0/2810.13.214.1 – 10.13.214.1410.13.214.15
9810.13.214.16/2810.13.214.17 – 10.13.214.3010.13.214.31
9910.13.214.32/2810.13.214.33 – 10.13.214.4610.13.214.47
10010.13.214.48/2810.13.214.49 – 10.13.214.6210.13.214.63
10110.13.214.64/2810.13.214.65 – 10.13.214.7810.13.214.79
10210.13.214.80/2810.13.214.81 – 10.13.214.9410.13.214.95
10310.13.214.96/2810.13.214.97 – 10.13.214.11010.13.214.111
10410.13.214.112/2810.13.214.113 – 10.13.214.12610.13.214.127
10510.13.214.128/2810.13.214.129 – 10.13.214.14210.13.214.143
10610.13.214.144/2810.13.214.145 – 10.13.214.15810.13.214.159
10710.13.214.160/2810.13.214.161 – 10.13.214.17410.13.214.175
10810.13.214.176/2810.13.214.177 – 10.13.214.19010.13.214.191
10910.13.214.192/2810.13.214.193 – 10.13.214.20610.13.214.207
11010.13.214.208/2810.13.214.209 – 10.13.214.22210.13.214.223
11110.13.214.224/2810.13.214.225 – 10.13.214.23810.13.214.239
11210.13.214.240/2810.13.214.241 – 10.13.214.25410.13.214.255
11310.13.215.0/2810.13.215.1 – 10.13.215.1410.13.215.15
11410.13.215.16/2810.13.215.17 – 10.13.215.3010.13.215.31
11510.13.215.32/2810.13.215.33 – 10.13.215.4610.13.215.47
11610.13.215.48/2810.13.215.49 – 10.13.215.6210.13.215.63
11710.13.215.64/2810.13.215.65 – 10.13.215.7810.13.215.79
11810.13.215.80/2810.13.215.81 – 10.13.215.9410.13.215.95
11910.13.215.96/2810.13.215.97 – 10.13.215.11010.13.215.111
12010.13.215.112/2810.13.215.113 – 10.13.215.12610.13.215.127
12110.13.215.128/2810.13.215.129 – 10.13.215.14210.13.215.143
12210.13.215.144/2810.13.215.145 – 10.13.215.15810.13.215.159
12310.13.215.160/2810.13.215.161 – 10.13.215.17410.13.215.175
12410.13.215.176/2810.13.215.177 – 10.13.215.19010.13.215.191
12510.13.215.192/2810.13.215.193 – 10.13.215.20610.13.215.207
12610.13.215.208/2810.13.215.209 – 10.13.215.22210.13.215.223
12710.13.215.224/2810.13.215.225 – 10.13.215.23810.13.215.239
12810.13.215.240/2810.13.215.241 – 10.13.215.25410.13.215.255
12910.13.216.0/2810.13.216.1 – 10.13.216.1410.13.216.15
13010.13.216.16/2810.13.216.17 – 10.13.216.3010.13.216.31
13110.13.216.32/2810.13.216.33 – 10.13.216.4610.13.216.47
13210.13.216.48/2810.13.216.49 – 10.13.216.6210.13.216.63
13310.13.216.64/2810.13.216.65 – 10.13.216.7810.13.216.79
13410.13.216.80/2810.13.216.81 – 10.13.216.9410.13.216.95
13510.13.216.96/2810.13.216.97 – 10.13.216.11010.13.216.111
13610.13.216.112/2810.13.216.113 – 10.13.216.12610.13.216.127
13710.13.216.128/2810.13.216.129 – 10.13.216.14210.13.216.143
13810.13.216.144/2810.13.216.145 – 10.13.216.15810.13.216.159
13910.13.216.160/2810.13.216.161 – 10.13.216.17410.13.216.175
14010.13.216.176/2810.13.216.177 – 10.13.216.19010.13.216.191
14110.13.216.192/2810.13.216.193 – 10.13.216.20610.13.216.207
14210.13.216.208/2810.13.216.209 – 10.13.216.22210.13.216.223
14310.13.216.224/2810.13.216.225 – 10.13.216.23810.13.216.239
14410.13.216.240/2810.13.216.241 – 10.13.216.25410.13.216.255
14510.13.217.0/2810.13.217.1 – 10.13.217.1410.13.217.15
14610.13.217.16/2810.13.217.17 – 10.13.217.3010.13.217.31
14710.13.217.32/2810.13.217.33 – 10.13.217.4610.13.217.47
14810.13.217.48/2810.13.217.49 – 10.13.217.6210.13.217.63
14910.13.217.64/2810.13.217.65 – 10.13.217.7810.13.217.79
15010.13.217.80/2810.13.217.81 – 10.13.217.9410.13.217.95
15110.13.217.96/2810.13.217.97 – 10.13.217.11010.13.217.111
15210.13.217.112/2810.13.217.113 – 10.13.217.12610.13.217.127
15310.13.217.128/2810.13.217.129 – 10.13.217.14210.13.217.143
15410.13.217.144/2810.13.217.145 – 10.13.217.15810.13.217.159
15510.13.217.160/2810.13.217.161 – 10.13.217.17410.13.217.175
15610.13.217.176/2810.13.217.177 – 10.13.217.19010.13.217.191
15710.13.217.192/2810.13.217.193 – 10.13.217.20610.13.217.207
15810.13.217.208/2810.13.217.209 – 10.13.217.22210.13.217.223
15910.13.217.224/2810.13.217.225 – 10.13.217.23810.13.217.239
16010.13.217.240/2810.13.217.241 – 10.13.217.25410.13.217.255
16110.13.218.0/2810.13.218.1 – 10.13.218.1410.13.218.15
16210.13.218.16/2810.13.218.17 – 10.13.218.3010.13.218.31
16310.13.218.32/2810.13.218.33 – 10.13.218.4610.13.218.47
16410.13.218.48/2810.13.218.49 – 10.13.218.6210.13.218.63
16510.13.218.64/2810.13.218.65 – 10.13.218.7810.13.218.79
16610.13.218.80/2810.13.218.81 – 10.13.218.9410.13.218.95
16710.13.218.96/2810.13.218.97 – 10.13.218.11010.13.218.111
16810.13.218.112/2810.13.218.113 – 10.13.218.12610.13.218.127
16910.13.218.128/2810.13.218.129 – 10.13.218.14210.13.218.143
17010.13.218.144/2810.13.218.145 – 10.13.218.15810.13.218.159
17110.13.218.160/2810.13.218.161 – 10.13.218.17410.13.218.175
17210.13.218.176/2810.13.218.177 – 10.13.218.19010.13.218.191
17310.13.218.192/2810.13.218.193 – 10.13.218.20610.13.218.207
17410.13.218.208/2810.13.218.209 – 10.13.218.22210.13.218.223
17510.13.218.224/2810.13.218.225 – 10.13.218.23810.13.218.239
17610.13.218.240/2810.13.218.241 – 10.13.218.25410.13.218.255
17710.13.219.0/2810.13.219.1 – 10.13.219.1410.13.219.15
17810.13.219.16/2810.13.219.17 – 10.13.219.3010.13.219.31
17910.13.219.32/2810.13.219.33 – 10.13.219.4610.13.219.47
18010.13.219.48/2810.13.219.49 – 10.13.219.6210.13.219.63
18110.13.219.64/2810.13.219.65 – 10.13.219.7810.13.219.79
18210.13.219.80/2810.13.219.81 – 10.13.219.9410.13.219.95
18310.13.219.96/2810.13.219.97 – 10.13.219.11010.13.219.111
18410.13.219.112/2810.13.219.113 – 10.13.219.12610.13.219.127
18510.13.219.128/2810.13.219.129 – 10.13.219.14210.13.219.143
18610.13.219.144/2810.13.219.145 – 10.13.219.15810.13.219.159
18710.13.219.160/2810.13.219.161 – 10.13.219.17410.13.219.175
18810.13.219.176/2810.13.219.177 – 10.13.219.19010.13.219.191
18910.13.219.192/2810.13.219.193 – 10.13.219.20610.13.219.207
19010.13.219.208/2810.13.219.209 – 10.13.219.22210.13.219.223
19110.13.219.224/2810.13.219.225 – 10.13.219.23810.13.219.239
19210.13.219.240/2810.13.219.241 – 10.13.219.25410.13.219.255
19310.13.220.0/2810.13.220.1 – 10.13.220.1410.13.220.15
19410.13.220.16/2810.13.220.17 – 10.13.220.3010.13.220.31
19510.13.220.32/2810.13.220.33 – 10.13.220.4610.13.220.47
19610.13.220.48/2810.13.220.49 – 10.13.220.6210.13.220.63
19710.13.220.64/2810.13.220.65 – 10.13.220.7810.13.220.79
19810.13.220.80/2810.13.220.81 – 10.13.220.9410.13.220.95
19910.13.220.96/2810.13.220.97 – 10.13.220.11010.13.220.111
20010.13.220.112/2810.13.220.113 – 10.13.220.12610.13.220.127
20110.13.220.128/2810.13.220.129 – 10.13.220.14210.13.220.143
20210.13.220.144/2810.13.220.145 – 10.13.220.15810.13.220.159
20310.13.220.160/2810.13.220.161 – 10.13.220.17410.13.220.175
20410.13.220.176/2810.13.220.177 – 10.13.220.19010.13.220.191
20510.13.220.192/2810.13.220.193 – 10.13.220.20610.13.220.207
20610.13.220.208/2810.13.220.209 – 10.13.220.22210.13.220.223
20710.13.220.224/2810.13.220.225 – 10.13.220.23810.13.220.239
20810.13.220.240/2810.13.220.241 – 10.13.220.25410.13.220.255
20910.13.221.0/2810.13.221.1 – 10.13.221.1410.13.221.15
21010.13.221.16/2810.13.221.17 – 10.13.221.3010.13.221.31
21110.13.221.32/2810.13.221.33 – 10.13.221.4610.13.221.47
21210.13.221.48/2810.13.221.49 – 10.13.221.6210.13.221.63
21310.13.221.64/2810.13.221.65 – 10.13.221.7810.13.221.79
21410.13.221.80/2810.13.221.81 – 10.13.221.9410.13.221.95
21510.13.221.96/2810.13.221.97 – 10.13.221.11010.13.221.111
21610.13.221.112/2810.13.221.113 – 10.13.221.12610.13.221.127
21710.13.221.128/2810.13.221.129 – 10.13.221.14210.13.221.143
21810.13.221.144/2810.13.221.145 – 10.13.221.15810.13.221.159
21910.13.221.160/2810.13.221.161 – 10.13.221.17410.13.221.175
22010.13.221.176/2810.13.221.177 – 10.13.221.19010.13.221.191
22110.13.221.192/2810.13.221.193 – 10.13.221.20610.13.221.207
22210.13.221.208/2810.13.221.209 – 10.13.221.22210.13.221.223
22310.13.221.224/2810.13.221.225 – 10.13.221.23810.13.221.239
22410.13.221.240/2810.13.221.241 – 10.13.221.25410.13.221.255
22510.13.222.0/2810.13.222.1 – 10.13.222.1410.13.222.15
22610.13.222.16/2810.13.222.17 – 10.13.222.3010.13.222.31
22710.13.222.32/2810.13.222.33 – 10.13.222.4610.13.222.47
22810.13.222.48/2810.13.222.49 – 10.13.222.6210.13.222.63
22910.13.222.64/2810.13.222.65 – 10.13.222.7810.13.222.79
23010.13.222.80/2810.13.222.81 – 10.13.222.9410.13.222.95
23110.13.222.96/2810.13.222.97 – 10.13.222.11010.13.222.111
23210.13.222.112/2810.13.222.113 – 10.13.222.12610.13.222.127
23310.13.222.128/2810.13.222.129 – 10.13.222.14210.13.222.143
23410.13.222.144/2810.13.222.145 – 10.13.222.15810.13.222.159
23510.13.222.160/2810.13.222.161 – 10.13.222.17410.13.222.175
23610.13.222.176/2810.13.222.177 – 10.13.222.19010.13.222.191
23710.13.222.192/2810.13.222.193 – 10.13.222.20610.13.222.207
23810.13.222.208/2810.13.222.209 – 10.13.222.22210.13.222.223
23910.13.222.224/2810.13.222.225 – 10.13.222.23810.13.222.239
24010.13.222.240/2810.13.222.241 – 10.13.222.25410.13.222.255
24110.13.223.0/2810.13.223.1 – 10.13.223.1410.13.223.15
24210.13.223.16/2810.13.223.17 – 10.13.223.3010.13.223.31
24310.13.223.32/2810.13.223.33 – 10.13.223.4610.13.223.47
24410.13.223.48/2810.13.223.49 – 10.13.223.6210.13.223.63
24510.13.223.64/2810.13.223.65 – 10.13.223.7810.13.223.79
24610.13.223.80/2810.13.223.81 – 10.13.223.9410.13.223.95
24710.13.223.96/2810.13.223.97 – 10.13.223.11010.13.223.111
24810.13.223.112/2810.13.223.113 – 10.13.223.12610.13.223.127
24910.13.223.128/2810.13.223.129 – 10.13.223.14210.13.223.143
25010.13.223.144/2810.13.223.145 – 10.13.223.15810.13.223.159
25110.13.223.160/2810.13.223.161 – 10.13.223.17410.13.223.175
25210.13.223.176/2810.13.223.177 – 10.13.223.19010.13.223.191
25310.13.223.192/2810.13.223.193 – 10.13.223.20610.13.223.207
25410.13.223.208/2810.13.223.209 – 10.13.223.22210.13.223.223
25510.13.223.224/2810.13.223.225 – 10.13.223.23810.13.223.239
25610.13.223.240/2810.13.223.241 – 10.13.223.25410.13.223.255
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 →