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)10.6.192.0/21
network10.6.192.0/21
broadcast10.6.199.255
first host10.6.192.1
last host10.6.199.254
subnet mask255.255.248.0
wildcard0.0.7.255
addresses2,048
usable hosts2,046
classA
ipcalc 10.6.192.0/21
address00001010.00000110.11000000.00000000
subnet mask11111111.11111111.11111000.00000000
network00001010.00000110.11000000.00000000
broadcast00001010.00000110.11000111.11111111
green = network part, grey = host part
hex0x0a06c000
decimal168214528
reverse dns0.192.6.10.in-addr.arpa
ipv4-mapped::ffff:a06:c000

/21 split into /30 · 512 subnets

close ×
#networkhost rangebroadcast
110.6.192.0/3010.6.192.1 – 10.6.192.210.6.192.3
210.6.192.4/3010.6.192.5 – 10.6.192.610.6.192.7
310.6.192.8/3010.6.192.9 – 10.6.192.1010.6.192.11
410.6.192.12/3010.6.192.13 – 10.6.192.1410.6.192.15
510.6.192.16/3010.6.192.17 – 10.6.192.1810.6.192.19
610.6.192.20/3010.6.192.21 – 10.6.192.2210.6.192.23
710.6.192.24/3010.6.192.25 – 10.6.192.2610.6.192.27
810.6.192.28/3010.6.192.29 – 10.6.192.3010.6.192.31
910.6.192.32/3010.6.192.33 – 10.6.192.3410.6.192.35
1010.6.192.36/3010.6.192.37 – 10.6.192.3810.6.192.39
1110.6.192.40/3010.6.192.41 – 10.6.192.4210.6.192.43
1210.6.192.44/3010.6.192.45 – 10.6.192.4610.6.192.47
1310.6.192.48/3010.6.192.49 – 10.6.192.5010.6.192.51
1410.6.192.52/3010.6.192.53 – 10.6.192.5410.6.192.55
1510.6.192.56/3010.6.192.57 – 10.6.192.5810.6.192.59
1610.6.192.60/3010.6.192.61 – 10.6.192.6210.6.192.63
1710.6.192.64/3010.6.192.65 – 10.6.192.6610.6.192.67
1810.6.192.68/3010.6.192.69 – 10.6.192.7010.6.192.71
1910.6.192.72/3010.6.192.73 – 10.6.192.7410.6.192.75
2010.6.192.76/3010.6.192.77 – 10.6.192.7810.6.192.79
2110.6.192.80/3010.6.192.81 – 10.6.192.8210.6.192.83
2210.6.192.84/3010.6.192.85 – 10.6.192.8610.6.192.87
2310.6.192.88/3010.6.192.89 – 10.6.192.9010.6.192.91
2410.6.192.92/3010.6.192.93 – 10.6.192.9410.6.192.95
2510.6.192.96/3010.6.192.97 – 10.6.192.9810.6.192.99
2610.6.192.100/3010.6.192.101 – 10.6.192.10210.6.192.103
2710.6.192.104/3010.6.192.105 – 10.6.192.10610.6.192.107
2810.6.192.108/3010.6.192.109 – 10.6.192.11010.6.192.111
2910.6.192.112/3010.6.192.113 – 10.6.192.11410.6.192.115
3010.6.192.116/3010.6.192.117 – 10.6.192.11810.6.192.119
3110.6.192.120/3010.6.192.121 – 10.6.192.12210.6.192.123
3210.6.192.124/3010.6.192.125 – 10.6.192.12610.6.192.127
3310.6.192.128/3010.6.192.129 – 10.6.192.13010.6.192.131
3410.6.192.132/3010.6.192.133 – 10.6.192.13410.6.192.135
3510.6.192.136/3010.6.192.137 – 10.6.192.13810.6.192.139
3610.6.192.140/3010.6.192.141 – 10.6.192.14210.6.192.143
3710.6.192.144/3010.6.192.145 – 10.6.192.14610.6.192.147
3810.6.192.148/3010.6.192.149 – 10.6.192.15010.6.192.151
3910.6.192.152/3010.6.192.153 – 10.6.192.15410.6.192.155
4010.6.192.156/3010.6.192.157 – 10.6.192.15810.6.192.159
4110.6.192.160/3010.6.192.161 – 10.6.192.16210.6.192.163
4210.6.192.164/3010.6.192.165 – 10.6.192.16610.6.192.167
4310.6.192.168/3010.6.192.169 – 10.6.192.17010.6.192.171
4410.6.192.172/3010.6.192.173 – 10.6.192.17410.6.192.175
4510.6.192.176/3010.6.192.177 – 10.6.192.17810.6.192.179
4610.6.192.180/3010.6.192.181 – 10.6.192.18210.6.192.183
4710.6.192.184/3010.6.192.185 – 10.6.192.18610.6.192.187
4810.6.192.188/3010.6.192.189 – 10.6.192.19010.6.192.191
4910.6.192.192/3010.6.192.193 – 10.6.192.19410.6.192.195
5010.6.192.196/3010.6.192.197 – 10.6.192.19810.6.192.199
5110.6.192.200/3010.6.192.201 – 10.6.192.20210.6.192.203
5210.6.192.204/3010.6.192.205 – 10.6.192.20610.6.192.207
5310.6.192.208/3010.6.192.209 – 10.6.192.21010.6.192.211
5410.6.192.212/3010.6.192.213 – 10.6.192.21410.6.192.215
5510.6.192.216/3010.6.192.217 – 10.6.192.21810.6.192.219
5610.6.192.220/3010.6.192.221 – 10.6.192.22210.6.192.223
5710.6.192.224/3010.6.192.225 – 10.6.192.22610.6.192.227
5810.6.192.228/3010.6.192.229 – 10.6.192.23010.6.192.231
5910.6.192.232/3010.6.192.233 – 10.6.192.23410.6.192.235
6010.6.192.236/3010.6.192.237 – 10.6.192.23810.6.192.239
6110.6.192.240/3010.6.192.241 – 10.6.192.24210.6.192.243
6210.6.192.244/3010.6.192.245 – 10.6.192.24610.6.192.247
6310.6.192.248/3010.6.192.249 – 10.6.192.25010.6.192.251
6410.6.192.252/3010.6.192.253 – 10.6.192.25410.6.192.255
6510.6.193.0/3010.6.193.1 – 10.6.193.210.6.193.3
6610.6.193.4/3010.6.193.5 – 10.6.193.610.6.193.7
6710.6.193.8/3010.6.193.9 – 10.6.193.1010.6.193.11
6810.6.193.12/3010.6.193.13 – 10.6.193.1410.6.193.15
6910.6.193.16/3010.6.193.17 – 10.6.193.1810.6.193.19
7010.6.193.20/3010.6.193.21 – 10.6.193.2210.6.193.23
7110.6.193.24/3010.6.193.25 – 10.6.193.2610.6.193.27
7210.6.193.28/3010.6.193.29 – 10.6.193.3010.6.193.31
7310.6.193.32/3010.6.193.33 – 10.6.193.3410.6.193.35
7410.6.193.36/3010.6.193.37 – 10.6.193.3810.6.193.39
7510.6.193.40/3010.6.193.41 – 10.6.193.4210.6.193.43
7610.6.193.44/3010.6.193.45 – 10.6.193.4610.6.193.47
7710.6.193.48/3010.6.193.49 – 10.6.193.5010.6.193.51
7810.6.193.52/3010.6.193.53 – 10.6.193.5410.6.193.55
7910.6.193.56/3010.6.193.57 – 10.6.193.5810.6.193.59
8010.6.193.60/3010.6.193.61 – 10.6.193.6210.6.193.63
8110.6.193.64/3010.6.193.65 – 10.6.193.6610.6.193.67
8210.6.193.68/3010.6.193.69 – 10.6.193.7010.6.193.71
8310.6.193.72/3010.6.193.73 – 10.6.193.7410.6.193.75
8410.6.193.76/3010.6.193.77 – 10.6.193.7810.6.193.79
8510.6.193.80/3010.6.193.81 – 10.6.193.8210.6.193.83
8610.6.193.84/3010.6.193.85 – 10.6.193.8610.6.193.87
8710.6.193.88/3010.6.193.89 – 10.6.193.9010.6.193.91
8810.6.193.92/3010.6.193.93 – 10.6.193.9410.6.193.95
8910.6.193.96/3010.6.193.97 – 10.6.193.9810.6.193.99
9010.6.193.100/3010.6.193.101 – 10.6.193.10210.6.193.103
9110.6.193.104/3010.6.193.105 – 10.6.193.10610.6.193.107
9210.6.193.108/3010.6.193.109 – 10.6.193.11010.6.193.111
9310.6.193.112/3010.6.193.113 – 10.6.193.11410.6.193.115
9410.6.193.116/3010.6.193.117 – 10.6.193.11810.6.193.119
9510.6.193.120/3010.6.193.121 – 10.6.193.12210.6.193.123
9610.6.193.124/3010.6.193.125 – 10.6.193.12610.6.193.127
9710.6.193.128/3010.6.193.129 – 10.6.193.13010.6.193.131
9810.6.193.132/3010.6.193.133 – 10.6.193.13410.6.193.135
9910.6.193.136/3010.6.193.137 – 10.6.193.13810.6.193.139
10010.6.193.140/3010.6.193.141 – 10.6.193.14210.6.193.143
10110.6.193.144/3010.6.193.145 – 10.6.193.14610.6.193.147
10210.6.193.148/3010.6.193.149 – 10.6.193.15010.6.193.151
10310.6.193.152/3010.6.193.153 – 10.6.193.15410.6.193.155
10410.6.193.156/3010.6.193.157 – 10.6.193.15810.6.193.159
10510.6.193.160/3010.6.193.161 – 10.6.193.16210.6.193.163
10610.6.193.164/3010.6.193.165 – 10.6.193.16610.6.193.167
10710.6.193.168/3010.6.193.169 – 10.6.193.17010.6.193.171
10810.6.193.172/3010.6.193.173 – 10.6.193.17410.6.193.175
10910.6.193.176/3010.6.193.177 – 10.6.193.17810.6.193.179
11010.6.193.180/3010.6.193.181 – 10.6.193.18210.6.193.183
11110.6.193.184/3010.6.193.185 – 10.6.193.18610.6.193.187
11210.6.193.188/3010.6.193.189 – 10.6.193.19010.6.193.191
11310.6.193.192/3010.6.193.193 – 10.6.193.19410.6.193.195
11410.6.193.196/3010.6.193.197 – 10.6.193.19810.6.193.199
11510.6.193.200/3010.6.193.201 – 10.6.193.20210.6.193.203
11610.6.193.204/3010.6.193.205 – 10.6.193.20610.6.193.207
11710.6.193.208/3010.6.193.209 – 10.6.193.21010.6.193.211
11810.6.193.212/3010.6.193.213 – 10.6.193.21410.6.193.215
11910.6.193.216/3010.6.193.217 – 10.6.193.21810.6.193.219
12010.6.193.220/3010.6.193.221 – 10.6.193.22210.6.193.223
12110.6.193.224/3010.6.193.225 – 10.6.193.22610.6.193.227
12210.6.193.228/3010.6.193.229 – 10.6.193.23010.6.193.231
12310.6.193.232/3010.6.193.233 – 10.6.193.23410.6.193.235
12410.6.193.236/3010.6.193.237 – 10.6.193.23810.6.193.239
12510.6.193.240/3010.6.193.241 – 10.6.193.24210.6.193.243
12610.6.193.244/3010.6.193.245 – 10.6.193.24610.6.193.247
12710.6.193.248/3010.6.193.249 – 10.6.193.25010.6.193.251
12810.6.193.252/3010.6.193.253 – 10.6.193.25410.6.193.255
12910.6.194.0/3010.6.194.1 – 10.6.194.210.6.194.3
13010.6.194.4/3010.6.194.5 – 10.6.194.610.6.194.7
13110.6.194.8/3010.6.194.9 – 10.6.194.1010.6.194.11
13210.6.194.12/3010.6.194.13 – 10.6.194.1410.6.194.15
13310.6.194.16/3010.6.194.17 – 10.6.194.1810.6.194.19
13410.6.194.20/3010.6.194.21 – 10.6.194.2210.6.194.23
13510.6.194.24/3010.6.194.25 – 10.6.194.2610.6.194.27
13610.6.194.28/3010.6.194.29 – 10.6.194.3010.6.194.31
13710.6.194.32/3010.6.194.33 – 10.6.194.3410.6.194.35
13810.6.194.36/3010.6.194.37 – 10.6.194.3810.6.194.39
13910.6.194.40/3010.6.194.41 – 10.6.194.4210.6.194.43
14010.6.194.44/3010.6.194.45 – 10.6.194.4610.6.194.47
14110.6.194.48/3010.6.194.49 – 10.6.194.5010.6.194.51
14210.6.194.52/3010.6.194.53 – 10.6.194.5410.6.194.55
14310.6.194.56/3010.6.194.57 – 10.6.194.5810.6.194.59
14410.6.194.60/3010.6.194.61 – 10.6.194.6210.6.194.63
14510.6.194.64/3010.6.194.65 – 10.6.194.6610.6.194.67
14610.6.194.68/3010.6.194.69 – 10.6.194.7010.6.194.71
14710.6.194.72/3010.6.194.73 – 10.6.194.7410.6.194.75
14810.6.194.76/3010.6.194.77 – 10.6.194.7810.6.194.79
14910.6.194.80/3010.6.194.81 – 10.6.194.8210.6.194.83
15010.6.194.84/3010.6.194.85 – 10.6.194.8610.6.194.87
15110.6.194.88/3010.6.194.89 – 10.6.194.9010.6.194.91
15210.6.194.92/3010.6.194.93 – 10.6.194.9410.6.194.95
15310.6.194.96/3010.6.194.97 – 10.6.194.9810.6.194.99
15410.6.194.100/3010.6.194.101 – 10.6.194.10210.6.194.103
15510.6.194.104/3010.6.194.105 – 10.6.194.10610.6.194.107
15610.6.194.108/3010.6.194.109 – 10.6.194.11010.6.194.111
15710.6.194.112/3010.6.194.113 – 10.6.194.11410.6.194.115
15810.6.194.116/3010.6.194.117 – 10.6.194.11810.6.194.119
15910.6.194.120/3010.6.194.121 – 10.6.194.12210.6.194.123
16010.6.194.124/3010.6.194.125 – 10.6.194.12610.6.194.127
16110.6.194.128/3010.6.194.129 – 10.6.194.13010.6.194.131
16210.6.194.132/3010.6.194.133 – 10.6.194.13410.6.194.135
16310.6.194.136/3010.6.194.137 – 10.6.194.13810.6.194.139
16410.6.194.140/3010.6.194.141 – 10.6.194.14210.6.194.143
16510.6.194.144/3010.6.194.145 – 10.6.194.14610.6.194.147
16610.6.194.148/3010.6.194.149 – 10.6.194.15010.6.194.151
16710.6.194.152/3010.6.194.153 – 10.6.194.15410.6.194.155
16810.6.194.156/3010.6.194.157 – 10.6.194.15810.6.194.159
16910.6.194.160/3010.6.194.161 – 10.6.194.16210.6.194.163
17010.6.194.164/3010.6.194.165 – 10.6.194.16610.6.194.167
17110.6.194.168/3010.6.194.169 – 10.6.194.17010.6.194.171
17210.6.194.172/3010.6.194.173 – 10.6.194.17410.6.194.175
17310.6.194.176/3010.6.194.177 – 10.6.194.17810.6.194.179
17410.6.194.180/3010.6.194.181 – 10.6.194.18210.6.194.183
17510.6.194.184/3010.6.194.185 – 10.6.194.18610.6.194.187
17610.6.194.188/3010.6.194.189 – 10.6.194.19010.6.194.191
17710.6.194.192/3010.6.194.193 – 10.6.194.19410.6.194.195
17810.6.194.196/3010.6.194.197 – 10.6.194.19810.6.194.199
17910.6.194.200/3010.6.194.201 – 10.6.194.20210.6.194.203
18010.6.194.204/3010.6.194.205 – 10.6.194.20610.6.194.207
18110.6.194.208/3010.6.194.209 – 10.6.194.21010.6.194.211
18210.6.194.212/3010.6.194.213 – 10.6.194.21410.6.194.215
18310.6.194.216/3010.6.194.217 – 10.6.194.21810.6.194.219
18410.6.194.220/3010.6.194.221 – 10.6.194.22210.6.194.223
18510.6.194.224/3010.6.194.225 – 10.6.194.22610.6.194.227
18610.6.194.228/3010.6.194.229 – 10.6.194.23010.6.194.231
18710.6.194.232/3010.6.194.233 – 10.6.194.23410.6.194.235
18810.6.194.236/3010.6.194.237 – 10.6.194.23810.6.194.239
18910.6.194.240/3010.6.194.241 – 10.6.194.24210.6.194.243
19010.6.194.244/3010.6.194.245 – 10.6.194.24610.6.194.247
19110.6.194.248/3010.6.194.249 – 10.6.194.25010.6.194.251
19210.6.194.252/3010.6.194.253 – 10.6.194.25410.6.194.255
19310.6.195.0/3010.6.195.1 – 10.6.195.210.6.195.3
19410.6.195.4/3010.6.195.5 – 10.6.195.610.6.195.7
19510.6.195.8/3010.6.195.9 – 10.6.195.1010.6.195.11
19610.6.195.12/3010.6.195.13 – 10.6.195.1410.6.195.15
19710.6.195.16/3010.6.195.17 – 10.6.195.1810.6.195.19
19810.6.195.20/3010.6.195.21 – 10.6.195.2210.6.195.23
19910.6.195.24/3010.6.195.25 – 10.6.195.2610.6.195.27
20010.6.195.28/3010.6.195.29 – 10.6.195.3010.6.195.31
20110.6.195.32/3010.6.195.33 – 10.6.195.3410.6.195.35
20210.6.195.36/3010.6.195.37 – 10.6.195.3810.6.195.39
20310.6.195.40/3010.6.195.41 – 10.6.195.4210.6.195.43
20410.6.195.44/3010.6.195.45 – 10.6.195.4610.6.195.47
20510.6.195.48/3010.6.195.49 – 10.6.195.5010.6.195.51
20610.6.195.52/3010.6.195.53 – 10.6.195.5410.6.195.55
20710.6.195.56/3010.6.195.57 – 10.6.195.5810.6.195.59
20810.6.195.60/3010.6.195.61 – 10.6.195.6210.6.195.63
20910.6.195.64/3010.6.195.65 – 10.6.195.6610.6.195.67
21010.6.195.68/3010.6.195.69 – 10.6.195.7010.6.195.71
21110.6.195.72/3010.6.195.73 – 10.6.195.7410.6.195.75
21210.6.195.76/3010.6.195.77 – 10.6.195.7810.6.195.79
21310.6.195.80/3010.6.195.81 – 10.6.195.8210.6.195.83
21410.6.195.84/3010.6.195.85 – 10.6.195.8610.6.195.87
21510.6.195.88/3010.6.195.89 – 10.6.195.9010.6.195.91
21610.6.195.92/3010.6.195.93 – 10.6.195.9410.6.195.95
21710.6.195.96/3010.6.195.97 – 10.6.195.9810.6.195.99
21810.6.195.100/3010.6.195.101 – 10.6.195.10210.6.195.103
21910.6.195.104/3010.6.195.105 – 10.6.195.10610.6.195.107
22010.6.195.108/3010.6.195.109 – 10.6.195.11010.6.195.111
22110.6.195.112/3010.6.195.113 – 10.6.195.11410.6.195.115
22210.6.195.116/3010.6.195.117 – 10.6.195.11810.6.195.119
22310.6.195.120/3010.6.195.121 – 10.6.195.12210.6.195.123
22410.6.195.124/3010.6.195.125 – 10.6.195.12610.6.195.127
22510.6.195.128/3010.6.195.129 – 10.6.195.13010.6.195.131
22610.6.195.132/3010.6.195.133 – 10.6.195.13410.6.195.135
22710.6.195.136/3010.6.195.137 – 10.6.195.13810.6.195.139
22810.6.195.140/3010.6.195.141 – 10.6.195.14210.6.195.143
22910.6.195.144/3010.6.195.145 – 10.6.195.14610.6.195.147
23010.6.195.148/3010.6.195.149 – 10.6.195.15010.6.195.151
23110.6.195.152/3010.6.195.153 – 10.6.195.15410.6.195.155
23210.6.195.156/3010.6.195.157 – 10.6.195.15810.6.195.159
23310.6.195.160/3010.6.195.161 – 10.6.195.16210.6.195.163
23410.6.195.164/3010.6.195.165 – 10.6.195.16610.6.195.167
23510.6.195.168/3010.6.195.169 – 10.6.195.17010.6.195.171
23610.6.195.172/3010.6.195.173 – 10.6.195.17410.6.195.175
23710.6.195.176/3010.6.195.177 – 10.6.195.17810.6.195.179
23810.6.195.180/3010.6.195.181 – 10.6.195.18210.6.195.183
23910.6.195.184/3010.6.195.185 – 10.6.195.18610.6.195.187
24010.6.195.188/3010.6.195.189 – 10.6.195.19010.6.195.191
24110.6.195.192/3010.6.195.193 – 10.6.195.19410.6.195.195
24210.6.195.196/3010.6.195.197 – 10.6.195.19810.6.195.199
24310.6.195.200/3010.6.195.201 – 10.6.195.20210.6.195.203
24410.6.195.204/3010.6.195.205 – 10.6.195.20610.6.195.207
24510.6.195.208/3010.6.195.209 – 10.6.195.21010.6.195.211
24610.6.195.212/3010.6.195.213 – 10.6.195.21410.6.195.215
24710.6.195.216/3010.6.195.217 – 10.6.195.21810.6.195.219
24810.6.195.220/3010.6.195.221 – 10.6.195.22210.6.195.223
24910.6.195.224/3010.6.195.225 – 10.6.195.22610.6.195.227
25010.6.195.228/3010.6.195.229 – 10.6.195.23010.6.195.231
25110.6.195.232/3010.6.195.233 – 10.6.195.23410.6.195.235
25210.6.195.236/3010.6.195.237 – 10.6.195.23810.6.195.239
25310.6.195.240/3010.6.195.241 – 10.6.195.24210.6.195.243
25410.6.195.244/3010.6.195.245 – 10.6.195.24610.6.195.247
25510.6.195.248/3010.6.195.249 – 10.6.195.25010.6.195.251
25610.6.195.252/3010.6.195.253 – 10.6.195.25410.6.195.255

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 /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 →