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)10.166.80.0/23
network10.166.80.0/23
broadcast10.166.81.255
first host10.166.80.1
last host10.166.81.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.166.80.0/23
address00001010.10100110.01010000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10100110.01010000.00000000
broadcast00001010.10100110.01010001.11111111
green = network part, grey = host part
hex0x0aa65000
decimal178671616
reverse dns0.80.166.10.in-addr.arpa
ipv4-mapped::ffff:aa6:5000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.166.80.0/3010.166.80.1 – 10.166.80.210.166.80.3
210.166.80.4/3010.166.80.5 – 10.166.80.610.166.80.7
310.166.80.8/3010.166.80.9 – 10.166.80.1010.166.80.11
410.166.80.12/3010.166.80.13 – 10.166.80.1410.166.80.15
510.166.80.16/3010.166.80.17 – 10.166.80.1810.166.80.19
610.166.80.20/3010.166.80.21 – 10.166.80.2210.166.80.23
710.166.80.24/3010.166.80.25 – 10.166.80.2610.166.80.27
810.166.80.28/3010.166.80.29 – 10.166.80.3010.166.80.31
910.166.80.32/3010.166.80.33 – 10.166.80.3410.166.80.35
1010.166.80.36/3010.166.80.37 – 10.166.80.3810.166.80.39
1110.166.80.40/3010.166.80.41 – 10.166.80.4210.166.80.43
1210.166.80.44/3010.166.80.45 – 10.166.80.4610.166.80.47
1310.166.80.48/3010.166.80.49 – 10.166.80.5010.166.80.51
1410.166.80.52/3010.166.80.53 – 10.166.80.5410.166.80.55
1510.166.80.56/3010.166.80.57 – 10.166.80.5810.166.80.59
1610.166.80.60/3010.166.80.61 – 10.166.80.6210.166.80.63
1710.166.80.64/3010.166.80.65 – 10.166.80.6610.166.80.67
1810.166.80.68/3010.166.80.69 – 10.166.80.7010.166.80.71
1910.166.80.72/3010.166.80.73 – 10.166.80.7410.166.80.75
2010.166.80.76/3010.166.80.77 – 10.166.80.7810.166.80.79
2110.166.80.80/3010.166.80.81 – 10.166.80.8210.166.80.83
2210.166.80.84/3010.166.80.85 – 10.166.80.8610.166.80.87
2310.166.80.88/3010.166.80.89 – 10.166.80.9010.166.80.91
2410.166.80.92/3010.166.80.93 – 10.166.80.9410.166.80.95
2510.166.80.96/3010.166.80.97 – 10.166.80.9810.166.80.99
2610.166.80.100/3010.166.80.101 – 10.166.80.10210.166.80.103
2710.166.80.104/3010.166.80.105 – 10.166.80.10610.166.80.107
2810.166.80.108/3010.166.80.109 – 10.166.80.11010.166.80.111
2910.166.80.112/3010.166.80.113 – 10.166.80.11410.166.80.115
3010.166.80.116/3010.166.80.117 – 10.166.80.11810.166.80.119
3110.166.80.120/3010.166.80.121 – 10.166.80.12210.166.80.123
3210.166.80.124/3010.166.80.125 – 10.166.80.12610.166.80.127
3310.166.80.128/3010.166.80.129 – 10.166.80.13010.166.80.131
3410.166.80.132/3010.166.80.133 – 10.166.80.13410.166.80.135
3510.166.80.136/3010.166.80.137 – 10.166.80.13810.166.80.139
3610.166.80.140/3010.166.80.141 – 10.166.80.14210.166.80.143
3710.166.80.144/3010.166.80.145 – 10.166.80.14610.166.80.147
3810.166.80.148/3010.166.80.149 – 10.166.80.15010.166.80.151
3910.166.80.152/3010.166.80.153 – 10.166.80.15410.166.80.155
4010.166.80.156/3010.166.80.157 – 10.166.80.15810.166.80.159
4110.166.80.160/3010.166.80.161 – 10.166.80.16210.166.80.163
4210.166.80.164/3010.166.80.165 – 10.166.80.16610.166.80.167
4310.166.80.168/3010.166.80.169 – 10.166.80.17010.166.80.171
4410.166.80.172/3010.166.80.173 – 10.166.80.17410.166.80.175
4510.166.80.176/3010.166.80.177 – 10.166.80.17810.166.80.179
4610.166.80.180/3010.166.80.181 – 10.166.80.18210.166.80.183
4710.166.80.184/3010.166.80.185 – 10.166.80.18610.166.80.187
4810.166.80.188/3010.166.80.189 – 10.166.80.19010.166.80.191
4910.166.80.192/3010.166.80.193 – 10.166.80.19410.166.80.195
5010.166.80.196/3010.166.80.197 – 10.166.80.19810.166.80.199
5110.166.80.200/3010.166.80.201 – 10.166.80.20210.166.80.203
5210.166.80.204/3010.166.80.205 – 10.166.80.20610.166.80.207
5310.166.80.208/3010.166.80.209 – 10.166.80.21010.166.80.211
5410.166.80.212/3010.166.80.213 – 10.166.80.21410.166.80.215
5510.166.80.216/3010.166.80.217 – 10.166.80.21810.166.80.219
5610.166.80.220/3010.166.80.221 – 10.166.80.22210.166.80.223
5710.166.80.224/3010.166.80.225 – 10.166.80.22610.166.80.227
5810.166.80.228/3010.166.80.229 – 10.166.80.23010.166.80.231
5910.166.80.232/3010.166.80.233 – 10.166.80.23410.166.80.235
6010.166.80.236/3010.166.80.237 – 10.166.80.23810.166.80.239
6110.166.80.240/3010.166.80.241 – 10.166.80.24210.166.80.243
6210.166.80.244/3010.166.80.245 – 10.166.80.24610.166.80.247
6310.166.80.248/3010.166.80.249 – 10.166.80.25010.166.80.251
6410.166.80.252/3010.166.80.253 – 10.166.80.25410.166.80.255
6510.166.81.0/3010.166.81.1 – 10.166.81.210.166.81.3
6610.166.81.4/3010.166.81.5 – 10.166.81.610.166.81.7
6710.166.81.8/3010.166.81.9 – 10.166.81.1010.166.81.11
6810.166.81.12/3010.166.81.13 – 10.166.81.1410.166.81.15
6910.166.81.16/3010.166.81.17 – 10.166.81.1810.166.81.19
7010.166.81.20/3010.166.81.21 – 10.166.81.2210.166.81.23
7110.166.81.24/3010.166.81.25 – 10.166.81.2610.166.81.27
7210.166.81.28/3010.166.81.29 – 10.166.81.3010.166.81.31
7310.166.81.32/3010.166.81.33 – 10.166.81.3410.166.81.35
7410.166.81.36/3010.166.81.37 – 10.166.81.3810.166.81.39
7510.166.81.40/3010.166.81.41 – 10.166.81.4210.166.81.43
7610.166.81.44/3010.166.81.45 – 10.166.81.4610.166.81.47
7710.166.81.48/3010.166.81.49 – 10.166.81.5010.166.81.51
7810.166.81.52/3010.166.81.53 – 10.166.81.5410.166.81.55
7910.166.81.56/3010.166.81.57 – 10.166.81.5810.166.81.59
8010.166.81.60/3010.166.81.61 – 10.166.81.6210.166.81.63
8110.166.81.64/3010.166.81.65 – 10.166.81.6610.166.81.67
8210.166.81.68/3010.166.81.69 – 10.166.81.7010.166.81.71
8310.166.81.72/3010.166.81.73 – 10.166.81.7410.166.81.75
8410.166.81.76/3010.166.81.77 – 10.166.81.7810.166.81.79
8510.166.81.80/3010.166.81.81 – 10.166.81.8210.166.81.83
8610.166.81.84/3010.166.81.85 – 10.166.81.8610.166.81.87
8710.166.81.88/3010.166.81.89 – 10.166.81.9010.166.81.91
8810.166.81.92/3010.166.81.93 – 10.166.81.9410.166.81.95
8910.166.81.96/3010.166.81.97 – 10.166.81.9810.166.81.99
9010.166.81.100/3010.166.81.101 – 10.166.81.10210.166.81.103
9110.166.81.104/3010.166.81.105 – 10.166.81.10610.166.81.107
9210.166.81.108/3010.166.81.109 – 10.166.81.11010.166.81.111
9310.166.81.112/3010.166.81.113 – 10.166.81.11410.166.81.115
9410.166.81.116/3010.166.81.117 – 10.166.81.11810.166.81.119
9510.166.81.120/3010.166.81.121 – 10.166.81.12210.166.81.123
9610.166.81.124/3010.166.81.125 – 10.166.81.12610.166.81.127
9710.166.81.128/3010.166.81.129 – 10.166.81.13010.166.81.131
9810.166.81.132/3010.166.81.133 – 10.166.81.13410.166.81.135
9910.166.81.136/3010.166.81.137 – 10.166.81.13810.166.81.139
10010.166.81.140/3010.166.81.141 – 10.166.81.14210.166.81.143
10110.166.81.144/3010.166.81.145 – 10.166.81.14610.166.81.147
10210.166.81.148/3010.166.81.149 – 10.166.81.15010.166.81.151
10310.166.81.152/3010.166.81.153 – 10.166.81.15410.166.81.155
10410.166.81.156/3010.166.81.157 – 10.166.81.15810.166.81.159
10510.166.81.160/3010.166.81.161 – 10.166.81.16210.166.81.163
10610.166.81.164/3010.166.81.165 – 10.166.81.16610.166.81.167
10710.166.81.168/3010.166.81.169 – 10.166.81.17010.166.81.171
10810.166.81.172/3010.166.81.173 – 10.166.81.17410.166.81.175
10910.166.81.176/3010.166.81.177 – 10.166.81.17810.166.81.179
11010.166.81.180/3010.166.81.181 – 10.166.81.18210.166.81.183
11110.166.81.184/3010.166.81.185 – 10.166.81.18610.166.81.187
11210.166.81.188/3010.166.81.189 – 10.166.81.19010.166.81.191
11310.166.81.192/3010.166.81.193 – 10.166.81.19410.166.81.195
11410.166.81.196/3010.166.81.197 – 10.166.81.19810.166.81.199
11510.166.81.200/3010.166.81.201 – 10.166.81.20210.166.81.203
11610.166.81.204/3010.166.81.205 – 10.166.81.20610.166.81.207
11710.166.81.208/3010.166.81.209 – 10.166.81.21010.166.81.211
11810.166.81.212/3010.166.81.213 – 10.166.81.21410.166.81.215
11910.166.81.216/3010.166.81.217 – 10.166.81.21810.166.81.219
12010.166.81.220/3010.166.81.221 – 10.166.81.22210.166.81.223
12110.166.81.224/3010.166.81.225 – 10.166.81.22610.166.81.227
12210.166.81.228/3010.166.81.229 – 10.166.81.23010.166.81.231
12310.166.81.232/3010.166.81.233 – 10.166.81.23410.166.81.235
12410.166.81.236/3010.166.81.237 – 10.166.81.23810.166.81.239
12510.166.81.240/3010.166.81.241 – 10.166.81.24210.166.81.243
12610.166.81.244/3010.166.81.245 – 10.166.81.24610.166.81.247
12710.166.81.248/3010.166.81.249 – 10.166.81.25010.166.81.251
12810.166.81.252/3010.166.81.253 – 10.166.81.25410.166.81.255
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 →