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)10.65.232.0/23
network10.65.232.0/23
broadcast10.65.233.255
first host10.65.232.1
last host10.65.233.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.65.232.0/23
address00001010.01000001.11101000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000001.11101000.00000000
broadcast00001010.01000001.11101001.11111111
green = network part, grey = host part
hex0x0a41e800
decimal172091392
reverse dns0.232.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:e800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.65.232.0/3010.65.232.1 – 10.65.232.210.65.232.3
210.65.232.4/3010.65.232.5 – 10.65.232.610.65.232.7
310.65.232.8/3010.65.232.9 – 10.65.232.1010.65.232.11
410.65.232.12/3010.65.232.13 – 10.65.232.1410.65.232.15
510.65.232.16/3010.65.232.17 – 10.65.232.1810.65.232.19
610.65.232.20/3010.65.232.21 – 10.65.232.2210.65.232.23
710.65.232.24/3010.65.232.25 – 10.65.232.2610.65.232.27
810.65.232.28/3010.65.232.29 – 10.65.232.3010.65.232.31
910.65.232.32/3010.65.232.33 – 10.65.232.3410.65.232.35
1010.65.232.36/3010.65.232.37 – 10.65.232.3810.65.232.39
1110.65.232.40/3010.65.232.41 – 10.65.232.4210.65.232.43
1210.65.232.44/3010.65.232.45 – 10.65.232.4610.65.232.47
1310.65.232.48/3010.65.232.49 – 10.65.232.5010.65.232.51
1410.65.232.52/3010.65.232.53 – 10.65.232.5410.65.232.55
1510.65.232.56/3010.65.232.57 – 10.65.232.5810.65.232.59
1610.65.232.60/3010.65.232.61 – 10.65.232.6210.65.232.63
1710.65.232.64/3010.65.232.65 – 10.65.232.6610.65.232.67
1810.65.232.68/3010.65.232.69 – 10.65.232.7010.65.232.71
1910.65.232.72/3010.65.232.73 – 10.65.232.7410.65.232.75
2010.65.232.76/3010.65.232.77 – 10.65.232.7810.65.232.79
2110.65.232.80/3010.65.232.81 – 10.65.232.8210.65.232.83
2210.65.232.84/3010.65.232.85 – 10.65.232.8610.65.232.87
2310.65.232.88/3010.65.232.89 – 10.65.232.9010.65.232.91
2410.65.232.92/3010.65.232.93 – 10.65.232.9410.65.232.95
2510.65.232.96/3010.65.232.97 – 10.65.232.9810.65.232.99
2610.65.232.100/3010.65.232.101 – 10.65.232.10210.65.232.103
2710.65.232.104/3010.65.232.105 – 10.65.232.10610.65.232.107
2810.65.232.108/3010.65.232.109 – 10.65.232.11010.65.232.111
2910.65.232.112/3010.65.232.113 – 10.65.232.11410.65.232.115
3010.65.232.116/3010.65.232.117 – 10.65.232.11810.65.232.119
3110.65.232.120/3010.65.232.121 – 10.65.232.12210.65.232.123
3210.65.232.124/3010.65.232.125 – 10.65.232.12610.65.232.127
3310.65.232.128/3010.65.232.129 – 10.65.232.13010.65.232.131
3410.65.232.132/3010.65.232.133 – 10.65.232.13410.65.232.135
3510.65.232.136/3010.65.232.137 – 10.65.232.13810.65.232.139
3610.65.232.140/3010.65.232.141 – 10.65.232.14210.65.232.143
3710.65.232.144/3010.65.232.145 – 10.65.232.14610.65.232.147
3810.65.232.148/3010.65.232.149 – 10.65.232.15010.65.232.151
3910.65.232.152/3010.65.232.153 – 10.65.232.15410.65.232.155
4010.65.232.156/3010.65.232.157 – 10.65.232.15810.65.232.159
4110.65.232.160/3010.65.232.161 – 10.65.232.16210.65.232.163
4210.65.232.164/3010.65.232.165 – 10.65.232.16610.65.232.167
4310.65.232.168/3010.65.232.169 – 10.65.232.17010.65.232.171
4410.65.232.172/3010.65.232.173 – 10.65.232.17410.65.232.175
4510.65.232.176/3010.65.232.177 – 10.65.232.17810.65.232.179
4610.65.232.180/3010.65.232.181 – 10.65.232.18210.65.232.183
4710.65.232.184/3010.65.232.185 – 10.65.232.18610.65.232.187
4810.65.232.188/3010.65.232.189 – 10.65.232.19010.65.232.191
4910.65.232.192/3010.65.232.193 – 10.65.232.19410.65.232.195
5010.65.232.196/3010.65.232.197 – 10.65.232.19810.65.232.199
5110.65.232.200/3010.65.232.201 – 10.65.232.20210.65.232.203
5210.65.232.204/3010.65.232.205 – 10.65.232.20610.65.232.207
5310.65.232.208/3010.65.232.209 – 10.65.232.21010.65.232.211
5410.65.232.212/3010.65.232.213 – 10.65.232.21410.65.232.215
5510.65.232.216/3010.65.232.217 – 10.65.232.21810.65.232.219
5610.65.232.220/3010.65.232.221 – 10.65.232.22210.65.232.223
5710.65.232.224/3010.65.232.225 – 10.65.232.22610.65.232.227
5810.65.232.228/3010.65.232.229 – 10.65.232.23010.65.232.231
5910.65.232.232/3010.65.232.233 – 10.65.232.23410.65.232.235
6010.65.232.236/3010.65.232.237 – 10.65.232.23810.65.232.239
6110.65.232.240/3010.65.232.241 – 10.65.232.24210.65.232.243
6210.65.232.244/3010.65.232.245 – 10.65.232.24610.65.232.247
6310.65.232.248/3010.65.232.249 – 10.65.232.25010.65.232.251
6410.65.232.252/3010.65.232.253 – 10.65.232.25410.65.232.255
6510.65.233.0/3010.65.233.1 – 10.65.233.210.65.233.3
6610.65.233.4/3010.65.233.5 – 10.65.233.610.65.233.7
6710.65.233.8/3010.65.233.9 – 10.65.233.1010.65.233.11
6810.65.233.12/3010.65.233.13 – 10.65.233.1410.65.233.15
6910.65.233.16/3010.65.233.17 – 10.65.233.1810.65.233.19
7010.65.233.20/3010.65.233.21 – 10.65.233.2210.65.233.23
7110.65.233.24/3010.65.233.25 – 10.65.233.2610.65.233.27
7210.65.233.28/3010.65.233.29 – 10.65.233.3010.65.233.31
7310.65.233.32/3010.65.233.33 – 10.65.233.3410.65.233.35
7410.65.233.36/3010.65.233.37 – 10.65.233.3810.65.233.39
7510.65.233.40/3010.65.233.41 – 10.65.233.4210.65.233.43
7610.65.233.44/3010.65.233.45 – 10.65.233.4610.65.233.47
7710.65.233.48/3010.65.233.49 – 10.65.233.5010.65.233.51
7810.65.233.52/3010.65.233.53 – 10.65.233.5410.65.233.55
7910.65.233.56/3010.65.233.57 – 10.65.233.5810.65.233.59
8010.65.233.60/3010.65.233.61 – 10.65.233.6210.65.233.63
8110.65.233.64/3010.65.233.65 – 10.65.233.6610.65.233.67
8210.65.233.68/3010.65.233.69 – 10.65.233.7010.65.233.71
8310.65.233.72/3010.65.233.73 – 10.65.233.7410.65.233.75
8410.65.233.76/3010.65.233.77 – 10.65.233.7810.65.233.79
8510.65.233.80/3010.65.233.81 – 10.65.233.8210.65.233.83
8610.65.233.84/3010.65.233.85 – 10.65.233.8610.65.233.87
8710.65.233.88/3010.65.233.89 – 10.65.233.9010.65.233.91
8810.65.233.92/3010.65.233.93 – 10.65.233.9410.65.233.95
8910.65.233.96/3010.65.233.97 – 10.65.233.9810.65.233.99
9010.65.233.100/3010.65.233.101 – 10.65.233.10210.65.233.103
9110.65.233.104/3010.65.233.105 – 10.65.233.10610.65.233.107
9210.65.233.108/3010.65.233.109 – 10.65.233.11010.65.233.111
9310.65.233.112/3010.65.233.113 – 10.65.233.11410.65.233.115
9410.65.233.116/3010.65.233.117 – 10.65.233.11810.65.233.119
9510.65.233.120/3010.65.233.121 – 10.65.233.12210.65.233.123
9610.65.233.124/3010.65.233.125 – 10.65.233.12610.65.233.127
9710.65.233.128/3010.65.233.129 – 10.65.233.13010.65.233.131
9810.65.233.132/3010.65.233.133 – 10.65.233.13410.65.233.135
9910.65.233.136/3010.65.233.137 – 10.65.233.13810.65.233.139
10010.65.233.140/3010.65.233.141 – 10.65.233.14210.65.233.143
10110.65.233.144/3010.65.233.145 – 10.65.233.14610.65.233.147
10210.65.233.148/3010.65.233.149 – 10.65.233.15010.65.233.151
10310.65.233.152/3010.65.233.153 – 10.65.233.15410.65.233.155
10410.65.233.156/3010.65.233.157 – 10.65.233.15810.65.233.159
10510.65.233.160/3010.65.233.161 – 10.65.233.16210.65.233.163
10610.65.233.164/3010.65.233.165 – 10.65.233.16610.65.233.167
10710.65.233.168/3010.65.233.169 – 10.65.233.17010.65.233.171
10810.65.233.172/3010.65.233.173 – 10.65.233.17410.65.233.175
10910.65.233.176/3010.65.233.177 – 10.65.233.17810.65.233.179
11010.65.233.180/3010.65.233.181 – 10.65.233.18210.65.233.183
11110.65.233.184/3010.65.233.185 – 10.65.233.18610.65.233.187
11210.65.233.188/3010.65.233.189 – 10.65.233.19010.65.233.191
11310.65.233.192/3010.65.233.193 – 10.65.233.19410.65.233.195
11410.65.233.196/3010.65.233.197 – 10.65.233.19810.65.233.199
11510.65.233.200/3010.65.233.201 – 10.65.233.20210.65.233.203
11610.65.233.204/3010.65.233.205 – 10.65.233.20610.65.233.207
11710.65.233.208/3010.65.233.209 – 10.65.233.21010.65.233.211
11810.65.233.212/3010.65.233.213 – 10.65.233.21410.65.233.215
11910.65.233.216/3010.65.233.217 – 10.65.233.21810.65.233.219
12010.65.233.220/3010.65.233.221 – 10.65.233.22210.65.233.223
12110.65.233.224/3010.65.233.225 – 10.65.233.22610.65.233.227
12210.65.233.228/3010.65.233.229 – 10.65.233.23010.65.233.231
12310.65.233.232/3010.65.233.233 – 10.65.233.23410.65.233.235
12410.65.233.236/3010.65.233.237 – 10.65.233.23810.65.233.239
12510.65.233.240/3010.65.233.241 – 10.65.233.24210.65.233.243
12610.65.233.244/3010.65.233.245 – 10.65.233.24610.65.233.247
12710.65.233.248/3010.65.233.249 – 10.65.233.25010.65.233.251
12810.65.233.252/3010.65.233.253 – 10.65.233.25410.65.233.255
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 →