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
Try:192.168.1.10/2410.0.0.0/8172.16.5.4/20203.0.113.9/29
IPv6 calculator →
private IP (RFC 1918)10.166.36.0/23
network10.166.36.0/23
broadcast10.166.37.255
first host10.166.36.1
last host10.166.37.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.166.36.0/23
address00001010.10100110.00100100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100110.00100100.00000000
broadcast00001010.10100110.00100101.11111111
green = network part, grey = host part
hex0x0aa62400
decimal178660352
reverse dns0.36.166.10.in-addr.arpa
ipv4-mapped::ffff:aa6:2400

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.166.36.0/3010.166.36.1 – 10.166.36.210.166.36.3
210.166.36.4/3010.166.36.5 – 10.166.36.610.166.36.7
310.166.36.8/3010.166.36.9 – 10.166.36.1010.166.36.11
410.166.36.12/3010.166.36.13 – 10.166.36.1410.166.36.15
510.166.36.16/3010.166.36.17 – 10.166.36.1810.166.36.19
610.166.36.20/3010.166.36.21 – 10.166.36.2210.166.36.23
710.166.36.24/3010.166.36.25 – 10.166.36.2610.166.36.27
810.166.36.28/3010.166.36.29 – 10.166.36.3010.166.36.31
910.166.36.32/3010.166.36.33 – 10.166.36.3410.166.36.35
1010.166.36.36/3010.166.36.37 – 10.166.36.3810.166.36.39
1110.166.36.40/3010.166.36.41 – 10.166.36.4210.166.36.43
1210.166.36.44/3010.166.36.45 – 10.166.36.4610.166.36.47
1310.166.36.48/3010.166.36.49 – 10.166.36.5010.166.36.51
1410.166.36.52/3010.166.36.53 – 10.166.36.5410.166.36.55
1510.166.36.56/3010.166.36.57 – 10.166.36.5810.166.36.59
1610.166.36.60/3010.166.36.61 – 10.166.36.6210.166.36.63
1710.166.36.64/3010.166.36.65 – 10.166.36.6610.166.36.67
1810.166.36.68/3010.166.36.69 – 10.166.36.7010.166.36.71
1910.166.36.72/3010.166.36.73 – 10.166.36.7410.166.36.75
2010.166.36.76/3010.166.36.77 – 10.166.36.7810.166.36.79
2110.166.36.80/3010.166.36.81 – 10.166.36.8210.166.36.83
2210.166.36.84/3010.166.36.85 – 10.166.36.8610.166.36.87
2310.166.36.88/3010.166.36.89 – 10.166.36.9010.166.36.91
2410.166.36.92/3010.166.36.93 – 10.166.36.9410.166.36.95
2510.166.36.96/3010.166.36.97 – 10.166.36.9810.166.36.99
2610.166.36.100/3010.166.36.101 – 10.166.36.10210.166.36.103
2710.166.36.104/3010.166.36.105 – 10.166.36.10610.166.36.107
2810.166.36.108/3010.166.36.109 – 10.166.36.11010.166.36.111
2910.166.36.112/3010.166.36.113 – 10.166.36.11410.166.36.115
3010.166.36.116/3010.166.36.117 – 10.166.36.11810.166.36.119
3110.166.36.120/3010.166.36.121 – 10.166.36.12210.166.36.123
3210.166.36.124/3010.166.36.125 – 10.166.36.12610.166.36.127
3310.166.36.128/3010.166.36.129 – 10.166.36.13010.166.36.131
3410.166.36.132/3010.166.36.133 – 10.166.36.13410.166.36.135
3510.166.36.136/3010.166.36.137 – 10.166.36.13810.166.36.139
3610.166.36.140/3010.166.36.141 – 10.166.36.14210.166.36.143
3710.166.36.144/3010.166.36.145 – 10.166.36.14610.166.36.147
3810.166.36.148/3010.166.36.149 – 10.166.36.15010.166.36.151
3910.166.36.152/3010.166.36.153 – 10.166.36.15410.166.36.155
4010.166.36.156/3010.166.36.157 – 10.166.36.15810.166.36.159
4110.166.36.160/3010.166.36.161 – 10.166.36.16210.166.36.163
4210.166.36.164/3010.166.36.165 – 10.166.36.16610.166.36.167
4310.166.36.168/3010.166.36.169 – 10.166.36.17010.166.36.171
4410.166.36.172/3010.166.36.173 – 10.166.36.17410.166.36.175
4510.166.36.176/3010.166.36.177 – 10.166.36.17810.166.36.179
4610.166.36.180/3010.166.36.181 – 10.166.36.18210.166.36.183
4710.166.36.184/3010.166.36.185 – 10.166.36.18610.166.36.187
4810.166.36.188/3010.166.36.189 – 10.166.36.19010.166.36.191
4910.166.36.192/3010.166.36.193 – 10.166.36.19410.166.36.195
5010.166.36.196/3010.166.36.197 – 10.166.36.19810.166.36.199
5110.166.36.200/3010.166.36.201 – 10.166.36.20210.166.36.203
5210.166.36.204/3010.166.36.205 – 10.166.36.20610.166.36.207
5310.166.36.208/3010.166.36.209 – 10.166.36.21010.166.36.211
5410.166.36.212/3010.166.36.213 – 10.166.36.21410.166.36.215
5510.166.36.216/3010.166.36.217 – 10.166.36.21810.166.36.219
5610.166.36.220/3010.166.36.221 – 10.166.36.22210.166.36.223
5710.166.36.224/3010.166.36.225 – 10.166.36.22610.166.36.227
5810.166.36.228/3010.166.36.229 – 10.166.36.23010.166.36.231
5910.166.36.232/3010.166.36.233 – 10.166.36.23410.166.36.235
6010.166.36.236/3010.166.36.237 – 10.166.36.23810.166.36.239
6110.166.36.240/3010.166.36.241 – 10.166.36.24210.166.36.243
6210.166.36.244/3010.166.36.245 – 10.166.36.24610.166.36.247
6310.166.36.248/3010.166.36.249 – 10.166.36.25010.166.36.251
6410.166.36.252/3010.166.36.253 – 10.166.36.25410.166.36.255
6510.166.37.0/3010.166.37.1 – 10.166.37.210.166.37.3
6610.166.37.4/3010.166.37.5 – 10.166.37.610.166.37.7
6710.166.37.8/3010.166.37.9 – 10.166.37.1010.166.37.11
6810.166.37.12/3010.166.37.13 – 10.166.37.1410.166.37.15
6910.166.37.16/3010.166.37.17 – 10.166.37.1810.166.37.19
7010.166.37.20/3010.166.37.21 – 10.166.37.2210.166.37.23
7110.166.37.24/3010.166.37.25 – 10.166.37.2610.166.37.27
7210.166.37.28/3010.166.37.29 – 10.166.37.3010.166.37.31
7310.166.37.32/3010.166.37.33 – 10.166.37.3410.166.37.35
7410.166.37.36/3010.166.37.37 – 10.166.37.3810.166.37.39
7510.166.37.40/3010.166.37.41 – 10.166.37.4210.166.37.43
7610.166.37.44/3010.166.37.45 – 10.166.37.4610.166.37.47
7710.166.37.48/3010.166.37.49 – 10.166.37.5010.166.37.51
7810.166.37.52/3010.166.37.53 – 10.166.37.5410.166.37.55
7910.166.37.56/3010.166.37.57 – 10.166.37.5810.166.37.59
8010.166.37.60/3010.166.37.61 – 10.166.37.6210.166.37.63
8110.166.37.64/3010.166.37.65 – 10.166.37.6610.166.37.67
8210.166.37.68/3010.166.37.69 – 10.166.37.7010.166.37.71
8310.166.37.72/3010.166.37.73 – 10.166.37.7410.166.37.75
8410.166.37.76/3010.166.37.77 – 10.166.37.7810.166.37.79
8510.166.37.80/3010.166.37.81 – 10.166.37.8210.166.37.83
8610.166.37.84/3010.166.37.85 – 10.166.37.8610.166.37.87
8710.166.37.88/3010.166.37.89 – 10.166.37.9010.166.37.91
8810.166.37.92/3010.166.37.93 – 10.166.37.9410.166.37.95
8910.166.37.96/3010.166.37.97 – 10.166.37.9810.166.37.99
9010.166.37.100/3010.166.37.101 – 10.166.37.10210.166.37.103
9110.166.37.104/3010.166.37.105 – 10.166.37.10610.166.37.107
9210.166.37.108/3010.166.37.109 – 10.166.37.11010.166.37.111
9310.166.37.112/3010.166.37.113 – 10.166.37.11410.166.37.115
9410.166.37.116/3010.166.37.117 – 10.166.37.11810.166.37.119
9510.166.37.120/3010.166.37.121 – 10.166.37.12210.166.37.123
9610.166.37.124/3010.166.37.125 – 10.166.37.12610.166.37.127
9710.166.37.128/3010.166.37.129 – 10.166.37.13010.166.37.131
9810.166.37.132/3010.166.37.133 – 10.166.37.13410.166.37.135
9910.166.37.136/3010.166.37.137 – 10.166.37.13810.166.37.139
10010.166.37.140/3010.166.37.141 – 10.166.37.14210.166.37.143
10110.166.37.144/3010.166.37.145 – 10.166.37.14610.166.37.147
10210.166.37.148/3010.166.37.149 – 10.166.37.15010.166.37.151
10310.166.37.152/3010.166.37.153 – 10.166.37.15410.166.37.155
10410.166.37.156/3010.166.37.157 – 10.166.37.15810.166.37.159
10510.166.37.160/3010.166.37.161 – 10.166.37.16210.166.37.163
10610.166.37.164/3010.166.37.165 – 10.166.37.16610.166.37.167
10710.166.37.168/3010.166.37.169 – 10.166.37.17010.166.37.171
10810.166.37.172/3010.166.37.173 – 10.166.37.17410.166.37.175
10910.166.37.176/3010.166.37.177 – 10.166.37.17810.166.37.179
11010.166.37.180/3010.166.37.181 – 10.166.37.18210.166.37.183
11110.166.37.184/3010.166.37.185 – 10.166.37.18610.166.37.187
11210.166.37.188/3010.166.37.189 – 10.166.37.19010.166.37.191
11310.166.37.192/3010.166.37.193 – 10.166.37.19410.166.37.195
11410.166.37.196/3010.166.37.197 – 10.166.37.19810.166.37.199
11510.166.37.200/3010.166.37.201 – 10.166.37.20210.166.37.203
11610.166.37.204/3010.166.37.205 – 10.166.37.20610.166.37.207
11710.166.37.208/3010.166.37.209 – 10.166.37.21010.166.37.211
11810.166.37.212/3010.166.37.213 – 10.166.37.21410.166.37.215
11910.166.37.216/3010.166.37.217 – 10.166.37.21810.166.37.219
12010.166.37.220/3010.166.37.221 – 10.166.37.22210.166.37.223
12110.166.37.224/3010.166.37.225 – 10.166.37.22610.166.37.227
12210.166.37.228/3010.166.37.229 – 10.166.37.23010.166.37.231
12310.166.37.232/3010.166.37.233 – 10.166.37.23410.166.37.235
12410.166.37.236/3010.166.37.237 – 10.166.37.23810.166.37.239
12510.166.37.240/3010.166.37.241 – 10.166.37.24210.166.37.243
12610.166.37.244/3010.166.37.245 – 10.166.37.24610.166.37.247
12710.166.37.248/3010.166.37.249 – 10.166.37.25010.166.37.251
12810.166.37.252/3010.166.37.253 – 10.166.37.25410.166.37.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /23
/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-
/21255.255.248.02,0482,046-
/22255.255.252.01,0241,022-
/23255.255.254.05125101
/24255.255.255.02562542 split →
/25255.255.255.1281281264 split →
/26255.255.255.19264628 split →
/27255.255.255.224323016 split →
/28255.255.255.240161432 split →
/29255.255.255.2488664 split →
/30255.255.255.25242128 split →
/31255.255.255.25422256 split →
/32255.255.255.25511512 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 →