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)10.7.166.0/23
network10.7.166.0/23
broadcast10.7.167.255
first host10.7.166.1
last host10.7.167.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.7.166.0/23
address00001010.00000111.10100110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000111.10100110.00000000
broadcast00001010.00000111.10100111.11111111
green = network part, grey = host part
hex0x0a07a600
decimal168273408
reverse dns0.166.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:a600

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.166.0/3010.7.166.1 – 10.7.166.210.7.166.3
210.7.166.4/3010.7.166.5 – 10.7.166.610.7.166.7
310.7.166.8/3010.7.166.9 – 10.7.166.1010.7.166.11
410.7.166.12/3010.7.166.13 – 10.7.166.1410.7.166.15
510.7.166.16/3010.7.166.17 – 10.7.166.1810.7.166.19
610.7.166.20/3010.7.166.21 – 10.7.166.2210.7.166.23
710.7.166.24/3010.7.166.25 – 10.7.166.2610.7.166.27
810.7.166.28/3010.7.166.29 – 10.7.166.3010.7.166.31
910.7.166.32/3010.7.166.33 – 10.7.166.3410.7.166.35
1010.7.166.36/3010.7.166.37 – 10.7.166.3810.7.166.39
1110.7.166.40/3010.7.166.41 – 10.7.166.4210.7.166.43
1210.7.166.44/3010.7.166.45 – 10.7.166.4610.7.166.47
1310.7.166.48/3010.7.166.49 – 10.7.166.5010.7.166.51
1410.7.166.52/3010.7.166.53 – 10.7.166.5410.7.166.55
1510.7.166.56/3010.7.166.57 – 10.7.166.5810.7.166.59
1610.7.166.60/3010.7.166.61 – 10.7.166.6210.7.166.63
1710.7.166.64/3010.7.166.65 – 10.7.166.6610.7.166.67
1810.7.166.68/3010.7.166.69 – 10.7.166.7010.7.166.71
1910.7.166.72/3010.7.166.73 – 10.7.166.7410.7.166.75
2010.7.166.76/3010.7.166.77 – 10.7.166.7810.7.166.79
2110.7.166.80/3010.7.166.81 – 10.7.166.8210.7.166.83
2210.7.166.84/3010.7.166.85 – 10.7.166.8610.7.166.87
2310.7.166.88/3010.7.166.89 – 10.7.166.9010.7.166.91
2410.7.166.92/3010.7.166.93 – 10.7.166.9410.7.166.95
2510.7.166.96/3010.7.166.97 – 10.7.166.9810.7.166.99
2610.7.166.100/3010.7.166.101 – 10.7.166.10210.7.166.103
2710.7.166.104/3010.7.166.105 – 10.7.166.10610.7.166.107
2810.7.166.108/3010.7.166.109 – 10.7.166.11010.7.166.111
2910.7.166.112/3010.7.166.113 – 10.7.166.11410.7.166.115
3010.7.166.116/3010.7.166.117 – 10.7.166.11810.7.166.119
3110.7.166.120/3010.7.166.121 – 10.7.166.12210.7.166.123
3210.7.166.124/3010.7.166.125 – 10.7.166.12610.7.166.127
3310.7.166.128/3010.7.166.129 – 10.7.166.13010.7.166.131
3410.7.166.132/3010.7.166.133 – 10.7.166.13410.7.166.135
3510.7.166.136/3010.7.166.137 – 10.7.166.13810.7.166.139
3610.7.166.140/3010.7.166.141 – 10.7.166.14210.7.166.143
3710.7.166.144/3010.7.166.145 – 10.7.166.14610.7.166.147
3810.7.166.148/3010.7.166.149 – 10.7.166.15010.7.166.151
3910.7.166.152/3010.7.166.153 – 10.7.166.15410.7.166.155
4010.7.166.156/3010.7.166.157 – 10.7.166.15810.7.166.159
4110.7.166.160/3010.7.166.161 – 10.7.166.16210.7.166.163
4210.7.166.164/3010.7.166.165 – 10.7.166.16610.7.166.167
4310.7.166.168/3010.7.166.169 – 10.7.166.17010.7.166.171
4410.7.166.172/3010.7.166.173 – 10.7.166.17410.7.166.175
4510.7.166.176/3010.7.166.177 – 10.7.166.17810.7.166.179
4610.7.166.180/3010.7.166.181 – 10.7.166.18210.7.166.183
4710.7.166.184/3010.7.166.185 – 10.7.166.18610.7.166.187
4810.7.166.188/3010.7.166.189 – 10.7.166.19010.7.166.191
4910.7.166.192/3010.7.166.193 – 10.7.166.19410.7.166.195
5010.7.166.196/3010.7.166.197 – 10.7.166.19810.7.166.199
5110.7.166.200/3010.7.166.201 – 10.7.166.20210.7.166.203
5210.7.166.204/3010.7.166.205 – 10.7.166.20610.7.166.207
5310.7.166.208/3010.7.166.209 – 10.7.166.21010.7.166.211
5410.7.166.212/3010.7.166.213 – 10.7.166.21410.7.166.215
5510.7.166.216/3010.7.166.217 – 10.7.166.21810.7.166.219
5610.7.166.220/3010.7.166.221 – 10.7.166.22210.7.166.223
5710.7.166.224/3010.7.166.225 – 10.7.166.22610.7.166.227
5810.7.166.228/3010.7.166.229 – 10.7.166.23010.7.166.231
5910.7.166.232/3010.7.166.233 – 10.7.166.23410.7.166.235
6010.7.166.236/3010.7.166.237 – 10.7.166.23810.7.166.239
6110.7.166.240/3010.7.166.241 – 10.7.166.24210.7.166.243
6210.7.166.244/3010.7.166.245 – 10.7.166.24610.7.166.247
6310.7.166.248/3010.7.166.249 – 10.7.166.25010.7.166.251
6410.7.166.252/3010.7.166.253 – 10.7.166.25410.7.166.255
6510.7.167.0/3010.7.167.1 – 10.7.167.210.7.167.3
6610.7.167.4/3010.7.167.5 – 10.7.167.610.7.167.7
6710.7.167.8/3010.7.167.9 – 10.7.167.1010.7.167.11
6810.7.167.12/3010.7.167.13 – 10.7.167.1410.7.167.15
6910.7.167.16/3010.7.167.17 – 10.7.167.1810.7.167.19
7010.7.167.20/3010.7.167.21 – 10.7.167.2210.7.167.23
7110.7.167.24/3010.7.167.25 – 10.7.167.2610.7.167.27
7210.7.167.28/3010.7.167.29 – 10.7.167.3010.7.167.31
7310.7.167.32/3010.7.167.33 – 10.7.167.3410.7.167.35
7410.7.167.36/3010.7.167.37 – 10.7.167.3810.7.167.39
7510.7.167.40/3010.7.167.41 – 10.7.167.4210.7.167.43
7610.7.167.44/3010.7.167.45 – 10.7.167.4610.7.167.47
7710.7.167.48/3010.7.167.49 – 10.7.167.5010.7.167.51
7810.7.167.52/3010.7.167.53 – 10.7.167.5410.7.167.55
7910.7.167.56/3010.7.167.57 – 10.7.167.5810.7.167.59
8010.7.167.60/3010.7.167.61 – 10.7.167.6210.7.167.63
8110.7.167.64/3010.7.167.65 – 10.7.167.6610.7.167.67
8210.7.167.68/3010.7.167.69 – 10.7.167.7010.7.167.71
8310.7.167.72/3010.7.167.73 – 10.7.167.7410.7.167.75
8410.7.167.76/3010.7.167.77 – 10.7.167.7810.7.167.79
8510.7.167.80/3010.7.167.81 – 10.7.167.8210.7.167.83
8610.7.167.84/3010.7.167.85 – 10.7.167.8610.7.167.87
8710.7.167.88/3010.7.167.89 – 10.7.167.9010.7.167.91
8810.7.167.92/3010.7.167.93 – 10.7.167.9410.7.167.95
8910.7.167.96/3010.7.167.97 – 10.7.167.9810.7.167.99
9010.7.167.100/3010.7.167.101 – 10.7.167.10210.7.167.103
9110.7.167.104/3010.7.167.105 – 10.7.167.10610.7.167.107
9210.7.167.108/3010.7.167.109 – 10.7.167.11010.7.167.111
9310.7.167.112/3010.7.167.113 – 10.7.167.11410.7.167.115
9410.7.167.116/3010.7.167.117 – 10.7.167.11810.7.167.119
9510.7.167.120/3010.7.167.121 – 10.7.167.12210.7.167.123
9610.7.167.124/3010.7.167.125 – 10.7.167.12610.7.167.127
9710.7.167.128/3010.7.167.129 – 10.7.167.13010.7.167.131
9810.7.167.132/3010.7.167.133 – 10.7.167.13410.7.167.135
9910.7.167.136/3010.7.167.137 – 10.7.167.13810.7.167.139
10010.7.167.140/3010.7.167.141 – 10.7.167.14210.7.167.143
10110.7.167.144/3010.7.167.145 – 10.7.167.14610.7.167.147
10210.7.167.148/3010.7.167.149 – 10.7.167.15010.7.167.151
10310.7.167.152/3010.7.167.153 – 10.7.167.15410.7.167.155
10410.7.167.156/3010.7.167.157 – 10.7.167.15810.7.167.159
10510.7.167.160/3010.7.167.161 – 10.7.167.16210.7.167.163
10610.7.167.164/3010.7.167.165 – 10.7.167.16610.7.167.167
10710.7.167.168/3010.7.167.169 – 10.7.167.17010.7.167.171
10810.7.167.172/3010.7.167.173 – 10.7.167.17410.7.167.175
10910.7.167.176/3010.7.167.177 – 10.7.167.17810.7.167.179
11010.7.167.180/3010.7.167.181 – 10.7.167.18210.7.167.183
11110.7.167.184/3010.7.167.185 – 10.7.167.18610.7.167.187
11210.7.167.188/3010.7.167.189 – 10.7.167.19010.7.167.191
11310.7.167.192/3010.7.167.193 – 10.7.167.19410.7.167.195
11410.7.167.196/3010.7.167.197 – 10.7.167.19810.7.167.199
11510.7.167.200/3010.7.167.201 – 10.7.167.20210.7.167.203
11610.7.167.204/3010.7.167.205 – 10.7.167.20610.7.167.207
11710.7.167.208/3010.7.167.209 – 10.7.167.21010.7.167.211
11810.7.167.212/3010.7.167.213 – 10.7.167.21410.7.167.215
11910.7.167.216/3010.7.167.217 – 10.7.167.21810.7.167.219
12010.7.167.220/3010.7.167.221 – 10.7.167.22210.7.167.223
12110.7.167.224/3010.7.167.225 – 10.7.167.22610.7.167.227
12210.7.167.228/3010.7.167.229 – 10.7.167.23010.7.167.231
12310.7.167.232/3010.7.167.233 – 10.7.167.23410.7.167.235
12410.7.167.236/3010.7.167.237 – 10.7.167.23810.7.167.239
12510.7.167.240/3010.7.167.241 – 10.7.167.24210.7.167.243
12610.7.167.244/3010.7.167.245 – 10.7.167.24610.7.167.247
12710.7.167.248/3010.7.167.249 – 10.7.167.25010.7.167.251
12810.7.167.252/3010.7.167.253 – 10.7.167.25410.7.167.255
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 →