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)10.231.8.0/23
network10.231.8.0/23
broadcast10.231.9.255
first host10.231.8.1
last host10.231.9.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.231.8.0/23
address00001010.11100111.00001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.11100111.00001000.00000000
broadcast00001010.11100111.00001001.11111111
green = network part, grey = host part
hex0x0ae70800
decimal182913024
reverse dns0.8.231.10.in-addr.arpa
ipv4-mapped::ffff:ae7:800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.231.8.0/3010.231.8.1 – 10.231.8.210.231.8.3
210.231.8.4/3010.231.8.5 – 10.231.8.610.231.8.7
310.231.8.8/3010.231.8.9 – 10.231.8.1010.231.8.11
410.231.8.12/3010.231.8.13 – 10.231.8.1410.231.8.15
510.231.8.16/3010.231.8.17 – 10.231.8.1810.231.8.19
610.231.8.20/3010.231.8.21 – 10.231.8.2210.231.8.23
710.231.8.24/3010.231.8.25 – 10.231.8.2610.231.8.27
810.231.8.28/3010.231.8.29 – 10.231.8.3010.231.8.31
910.231.8.32/3010.231.8.33 – 10.231.8.3410.231.8.35
1010.231.8.36/3010.231.8.37 – 10.231.8.3810.231.8.39
1110.231.8.40/3010.231.8.41 – 10.231.8.4210.231.8.43
1210.231.8.44/3010.231.8.45 – 10.231.8.4610.231.8.47
1310.231.8.48/3010.231.8.49 – 10.231.8.5010.231.8.51
1410.231.8.52/3010.231.8.53 – 10.231.8.5410.231.8.55
1510.231.8.56/3010.231.8.57 – 10.231.8.5810.231.8.59
1610.231.8.60/3010.231.8.61 – 10.231.8.6210.231.8.63
1710.231.8.64/3010.231.8.65 – 10.231.8.6610.231.8.67
1810.231.8.68/3010.231.8.69 – 10.231.8.7010.231.8.71
1910.231.8.72/3010.231.8.73 – 10.231.8.7410.231.8.75
2010.231.8.76/3010.231.8.77 – 10.231.8.7810.231.8.79
2110.231.8.80/3010.231.8.81 – 10.231.8.8210.231.8.83
2210.231.8.84/3010.231.8.85 – 10.231.8.8610.231.8.87
2310.231.8.88/3010.231.8.89 – 10.231.8.9010.231.8.91
2410.231.8.92/3010.231.8.93 – 10.231.8.9410.231.8.95
2510.231.8.96/3010.231.8.97 – 10.231.8.9810.231.8.99
2610.231.8.100/3010.231.8.101 – 10.231.8.10210.231.8.103
2710.231.8.104/3010.231.8.105 – 10.231.8.10610.231.8.107
2810.231.8.108/3010.231.8.109 – 10.231.8.11010.231.8.111
2910.231.8.112/3010.231.8.113 – 10.231.8.11410.231.8.115
3010.231.8.116/3010.231.8.117 – 10.231.8.11810.231.8.119
3110.231.8.120/3010.231.8.121 – 10.231.8.12210.231.8.123
3210.231.8.124/3010.231.8.125 – 10.231.8.12610.231.8.127
3310.231.8.128/3010.231.8.129 – 10.231.8.13010.231.8.131
3410.231.8.132/3010.231.8.133 – 10.231.8.13410.231.8.135
3510.231.8.136/3010.231.8.137 – 10.231.8.13810.231.8.139
3610.231.8.140/3010.231.8.141 – 10.231.8.14210.231.8.143
3710.231.8.144/3010.231.8.145 – 10.231.8.14610.231.8.147
3810.231.8.148/3010.231.8.149 – 10.231.8.15010.231.8.151
3910.231.8.152/3010.231.8.153 – 10.231.8.15410.231.8.155
4010.231.8.156/3010.231.8.157 – 10.231.8.15810.231.8.159
4110.231.8.160/3010.231.8.161 – 10.231.8.16210.231.8.163
4210.231.8.164/3010.231.8.165 – 10.231.8.16610.231.8.167
4310.231.8.168/3010.231.8.169 – 10.231.8.17010.231.8.171
4410.231.8.172/3010.231.8.173 – 10.231.8.17410.231.8.175
4510.231.8.176/3010.231.8.177 – 10.231.8.17810.231.8.179
4610.231.8.180/3010.231.8.181 – 10.231.8.18210.231.8.183
4710.231.8.184/3010.231.8.185 – 10.231.8.18610.231.8.187
4810.231.8.188/3010.231.8.189 – 10.231.8.19010.231.8.191
4910.231.8.192/3010.231.8.193 – 10.231.8.19410.231.8.195
5010.231.8.196/3010.231.8.197 – 10.231.8.19810.231.8.199
5110.231.8.200/3010.231.8.201 – 10.231.8.20210.231.8.203
5210.231.8.204/3010.231.8.205 – 10.231.8.20610.231.8.207
5310.231.8.208/3010.231.8.209 – 10.231.8.21010.231.8.211
5410.231.8.212/3010.231.8.213 – 10.231.8.21410.231.8.215
5510.231.8.216/3010.231.8.217 – 10.231.8.21810.231.8.219
5610.231.8.220/3010.231.8.221 – 10.231.8.22210.231.8.223
5710.231.8.224/3010.231.8.225 – 10.231.8.22610.231.8.227
5810.231.8.228/3010.231.8.229 – 10.231.8.23010.231.8.231
5910.231.8.232/3010.231.8.233 – 10.231.8.23410.231.8.235
6010.231.8.236/3010.231.8.237 – 10.231.8.23810.231.8.239
6110.231.8.240/3010.231.8.241 – 10.231.8.24210.231.8.243
6210.231.8.244/3010.231.8.245 – 10.231.8.24610.231.8.247
6310.231.8.248/3010.231.8.249 – 10.231.8.25010.231.8.251
6410.231.8.252/3010.231.8.253 – 10.231.8.25410.231.8.255
6510.231.9.0/3010.231.9.1 – 10.231.9.210.231.9.3
6610.231.9.4/3010.231.9.5 – 10.231.9.610.231.9.7
6710.231.9.8/3010.231.9.9 – 10.231.9.1010.231.9.11
6810.231.9.12/3010.231.9.13 – 10.231.9.1410.231.9.15
6910.231.9.16/3010.231.9.17 – 10.231.9.1810.231.9.19
7010.231.9.20/3010.231.9.21 – 10.231.9.2210.231.9.23
7110.231.9.24/3010.231.9.25 – 10.231.9.2610.231.9.27
7210.231.9.28/3010.231.9.29 – 10.231.9.3010.231.9.31
7310.231.9.32/3010.231.9.33 – 10.231.9.3410.231.9.35
7410.231.9.36/3010.231.9.37 – 10.231.9.3810.231.9.39
7510.231.9.40/3010.231.9.41 – 10.231.9.4210.231.9.43
7610.231.9.44/3010.231.9.45 – 10.231.9.4610.231.9.47
7710.231.9.48/3010.231.9.49 – 10.231.9.5010.231.9.51
7810.231.9.52/3010.231.9.53 – 10.231.9.5410.231.9.55
7910.231.9.56/3010.231.9.57 – 10.231.9.5810.231.9.59
8010.231.9.60/3010.231.9.61 – 10.231.9.6210.231.9.63
8110.231.9.64/3010.231.9.65 – 10.231.9.6610.231.9.67
8210.231.9.68/3010.231.9.69 – 10.231.9.7010.231.9.71
8310.231.9.72/3010.231.9.73 – 10.231.9.7410.231.9.75
8410.231.9.76/3010.231.9.77 – 10.231.9.7810.231.9.79
8510.231.9.80/3010.231.9.81 – 10.231.9.8210.231.9.83
8610.231.9.84/3010.231.9.85 – 10.231.9.8610.231.9.87
8710.231.9.88/3010.231.9.89 – 10.231.9.9010.231.9.91
8810.231.9.92/3010.231.9.93 – 10.231.9.9410.231.9.95
8910.231.9.96/3010.231.9.97 – 10.231.9.9810.231.9.99
9010.231.9.100/3010.231.9.101 – 10.231.9.10210.231.9.103
9110.231.9.104/3010.231.9.105 – 10.231.9.10610.231.9.107
9210.231.9.108/3010.231.9.109 – 10.231.9.11010.231.9.111
9310.231.9.112/3010.231.9.113 – 10.231.9.11410.231.9.115
9410.231.9.116/3010.231.9.117 – 10.231.9.11810.231.9.119
9510.231.9.120/3010.231.9.121 – 10.231.9.12210.231.9.123
9610.231.9.124/3010.231.9.125 – 10.231.9.12610.231.9.127
9710.231.9.128/3010.231.9.129 – 10.231.9.13010.231.9.131
9810.231.9.132/3010.231.9.133 – 10.231.9.13410.231.9.135
9910.231.9.136/3010.231.9.137 – 10.231.9.13810.231.9.139
10010.231.9.140/3010.231.9.141 – 10.231.9.14210.231.9.143
10110.231.9.144/3010.231.9.145 – 10.231.9.14610.231.9.147
10210.231.9.148/3010.231.9.149 – 10.231.9.15010.231.9.151
10310.231.9.152/3010.231.9.153 – 10.231.9.15410.231.9.155
10410.231.9.156/3010.231.9.157 – 10.231.9.15810.231.9.159
10510.231.9.160/3010.231.9.161 – 10.231.9.16210.231.9.163
10610.231.9.164/3010.231.9.165 – 10.231.9.16610.231.9.167
10710.231.9.168/3010.231.9.169 – 10.231.9.17010.231.9.171
10810.231.9.172/3010.231.9.173 – 10.231.9.17410.231.9.175
10910.231.9.176/3010.231.9.177 – 10.231.9.17810.231.9.179
11010.231.9.180/3010.231.9.181 – 10.231.9.18210.231.9.183
11110.231.9.184/3010.231.9.185 – 10.231.9.18610.231.9.187
11210.231.9.188/3010.231.9.189 – 10.231.9.19010.231.9.191
11310.231.9.192/3010.231.9.193 – 10.231.9.19410.231.9.195
11410.231.9.196/3010.231.9.197 – 10.231.9.19810.231.9.199
11510.231.9.200/3010.231.9.201 – 10.231.9.20210.231.9.203
11610.231.9.204/3010.231.9.205 – 10.231.9.20610.231.9.207
11710.231.9.208/3010.231.9.209 – 10.231.9.21010.231.9.211
11810.231.9.212/3010.231.9.213 – 10.231.9.21410.231.9.215
11910.231.9.216/3010.231.9.217 – 10.231.9.21810.231.9.219
12010.231.9.220/3010.231.9.221 – 10.231.9.22210.231.9.223
12110.231.9.224/3010.231.9.225 – 10.231.9.22610.231.9.227
12210.231.9.228/3010.231.9.229 – 10.231.9.23010.231.9.231
12310.231.9.232/3010.231.9.233 – 10.231.9.23410.231.9.235
12410.231.9.236/3010.231.9.237 – 10.231.9.23810.231.9.239
12510.231.9.240/3010.231.9.241 – 10.231.9.24210.231.9.243
12610.231.9.244/3010.231.9.245 – 10.231.9.24610.231.9.247
12710.231.9.248/3010.231.9.249 – 10.231.9.25010.231.9.251
12810.231.9.252/3010.231.9.253 – 10.231.9.25410.231.9.255
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 →