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)10.72.68.0/23
network10.72.68.0/23
broadcast10.72.69.255
first host10.72.68.1
last host10.72.69.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.72.68.0/23
address00001010.01001000.01000100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001000.01000100.00000000
broadcast00001010.01001000.01000101.11111111
green = network part, grey = host part
hex0x0a484400
decimal172508160
reverse dns0.68.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:4400

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.68.0/3010.72.68.1 – 10.72.68.210.72.68.3
210.72.68.4/3010.72.68.5 – 10.72.68.610.72.68.7
310.72.68.8/3010.72.68.9 – 10.72.68.1010.72.68.11
410.72.68.12/3010.72.68.13 – 10.72.68.1410.72.68.15
510.72.68.16/3010.72.68.17 – 10.72.68.1810.72.68.19
610.72.68.20/3010.72.68.21 – 10.72.68.2210.72.68.23
710.72.68.24/3010.72.68.25 – 10.72.68.2610.72.68.27
810.72.68.28/3010.72.68.29 – 10.72.68.3010.72.68.31
910.72.68.32/3010.72.68.33 – 10.72.68.3410.72.68.35
1010.72.68.36/3010.72.68.37 – 10.72.68.3810.72.68.39
1110.72.68.40/3010.72.68.41 – 10.72.68.4210.72.68.43
1210.72.68.44/3010.72.68.45 – 10.72.68.4610.72.68.47
1310.72.68.48/3010.72.68.49 – 10.72.68.5010.72.68.51
1410.72.68.52/3010.72.68.53 – 10.72.68.5410.72.68.55
1510.72.68.56/3010.72.68.57 – 10.72.68.5810.72.68.59
1610.72.68.60/3010.72.68.61 – 10.72.68.6210.72.68.63
1710.72.68.64/3010.72.68.65 – 10.72.68.6610.72.68.67
1810.72.68.68/3010.72.68.69 – 10.72.68.7010.72.68.71
1910.72.68.72/3010.72.68.73 – 10.72.68.7410.72.68.75
2010.72.68.76/3010.72.68.77 – 10.72.68.7810.72.68.79
2110.72.68.80/3010.72.68.81 – 10.72.68.8210.72.68.83
2210.72.68.84/3010.72.68.85 – 10.72.68.8610.72.68.87
2310.72.68.88/3010.72.68.89 – 10.72.68.9010.72.68.91
2410.72.68.92/3010.72.68.93 – 10.72.68.9410.72.68.95
2510.72.68.96/3010.72.68.97 – 10.72.68.9810.72.68.99
2610.72.68.100/3010.72.68.101 – 10.72.68.10210.72.68.103
2710.72.68.104/3010.72.68.105 – 10.72.68.10610.72.68.107
2810.72.68.108/3010.72.68.109 – 10.72.68.11010.72.68.111
2910.72.68.112/3010.72.68.113 – 10.72.68.11410.72.68.115
3010.72.68.116/3010.72.68.117 – 10.72.68.11810.72.68.119
3110.72.68.120/3010.72.68.121 – 10.72.68.12210.72.68.123
3210.72.68.124/3010.72.68.125 – 10.72.68.12610.72.68.127
3310.72.68.128/3010.72.68.129 – 10.72.68.13010.72.68.131
3410.72.68.132/3010.72.68.133 – 10.72.68.13410.72.68.135
3510.72.68.136/3010.72.68.137 – 10.72.68.13810.72.68.139
3610.72.68.140/3010.72.68.141 – 10.72.68.14210.72.68.143
3710.72.68.144/3010.72.68.145 – 10.72.68.14610.72.68.147
3810.72.68.148/3010.72.68.149 – 10.72.68.15010.72.68.151
3910.72.68.152/3010.72.68.153 – 10.72.68.15410.72.68.155
4010.72.68.156/3010.72.68.157 – 10.72.68.15810.72.68.159
4110.72.68.160/3010.72.68.161 – 10.72.68.16210.72.68.163
4210.72.68.164/3010.72.68.165 – 10.72.68.16610.72.68.167
4310.72.68.168/3010.72.68.169 – 10.72.68.17010.72.68.171
4410.72.68.172/3010.72.68.173 – 10.72.68.17410.72.68.175
4510.72.68.176/3010.72.68.177 – 10.72.68.17810.72.68.179
4610.72.68.180/3010.72.68.181 – 10.72.68.18210.72.68.183
4710.72.68.184/3010.72.68.185 – 10.72.68.18610.72.68.187
4810.72.68.188/3010.72.68.189 – 10.72.68.19010.72.68.191
4910.72.68.192/3010.72.68.193 – 10.72.68.19410.72.68.195
5010.72.68.196/3010.72.68.197 – 10.72.68.19810.72.68.199
5110.72.68.200/3010.72.68.201 – 10.72.68.20210.72.68.203
5210.72.68.204/3010.72.68.205 – 10.72.68.20610.72.68.207
5310.72.68.208/3010.72.68.209 – 10.72.68.21010.72.68.211
5410.72.68.212/3010.72.68.213 – 10.72.68.21410.72.68.215
5510.72.68.216/3010.72.68.217 – 10.72.68.21810.72.68.219
5610.72.68.220/3010.72.68.221 – 10.72.68.22210.72.68.223
5710.72.68.224/3010.72.68.225 – 10.72.68.22610.72.68.227
5810.72.68.228/3010.72.68.229 – 10.72.68.23010.72.68.231
5910.72.68.232/3010.72.68.233 – 10.72.68.23410.72.68.235
6010.72.68.236/3010.72.68.237 – 10.72.68.23810.72.68.239
6110.72.68.240/3010.72.68.241 – 10.72.68.24210.72.68.243
6210.72.68.244/3010.72.68.245 – 10.72.68.24610.72.68.247
6310.72.68.248/3010.72.68.249 – 10.72.68.25010.72.68.251
6410.72.68.252/3010.72.68.253 – 10.72.68.25410.72.68.255
6510.72.69.0/3010.72.69.1 – 10.72.69.210.72.69.3
6610.72.69.4/3010.72.69.5 – 10.72.69.610.72.69.7
6710.72.69.8/3010.72.69.9 – 10.72.69.1010.72.69.11
6810.72.69.12/3010.72.69.13 – 10.72.69.1410.72.69.15
6910.72.69.16/3010.72.69.17 – 10.72.69.1810.72.69.19
7010.72.69.20/3010.72.69.21 – 10.72.69.2210.72.69.23
7110.72.69.24/3010.72.69.25 – 10.72.69.2610.72.69.27
7210.72.69.28/3010.72.69.29 – 10.72.69.3010.72.69.31
7310.72.69.32/3010.72.69.33 – 10.72.69.3410.72.69.35
7410.72.69.36/3010.72.69.37 – 10.72.69.3810.72.69.39
7510.72.69.40/3010.72.69.41 – 10.72.69.4210.72.69.43
7610.72.69.44/3010.72.69.45 – 10.72.69.4610.72.69.47
7710.72.69.48/3010.72.69.49 – 10.72.69.5010.72.69.51
7810.72.69.52/3010.72.69.53 – 10.72.69.5410.72.69.55
7910.72.69.56/3010.72.69.57 – 10.72.69.5810.72.69.59
8010.72.69.60/3010.72.69.61 – 10.72.69.6210.72.69.63
8110.72.69.64/3010.72.69.65 – 10.72.69.6610.72.69.67
8210.72.69.68/3010.72.69.69 – 10.72.69.7010.72.69.71
8310.72.69.72/3010.72.69.73 – 10.72.69.7410.72.69.75
8410.72.69.76/3010.72.69.77 – 10.72.69.7810.72.69.79
8510.72.69.80/3010.72.69.81 – 10.72.69.8210.72.69.83
8610.72.69.84/3010.72.69.85 – 10.72.69.8610.72.69.87
8710.72.69.88/3010.72.69.89 – 10.72.69.9010.72.69.91
8810.72.69.92/3010.72.69.93 – 10.72.69.9410.72.69.95
8910.72.69.96/3010.72.69.97 – 10.72.69.9810.72.69.99
9010.72.69.100/3010.72.69.101 – 10.72.69.10210.72.69.103
9110.72.69.104/3010.72.69.105 – 10.72.69.10610.72.69.107
9210.72.69.108/3010.72.69.109 – 10.72.69.11010.72.69.111
9310.72.69.112/3010.72.69.113 – 10.72.69.11410.72.69.115
9410.72.69.116/3010.72.69.117 – 10.72.69.11810.72.69.119
9510.72.69.120/3010.72.69.121 – 10.72.69.12210.72.69.123
9610.72.69.124/3010.72.69.125 – 10.72.69.12610.72.69.127
9710.72.69.128/3010.72.69.129 – 10.72.69.13010.72.69.131
9810.72.69.132/3010.72.69.133 – 10.72.69.13410.72.69.135
9910.72.69.136/3010.72.69.137 – 10.72.69.13810.72.69.139
10010.72.69.140/3010.72.69.141 – 10.72.69.14210.72.69.143
10110.72.69.144/3010.72.69.145 – 10.72.69.14610.72.69.147
10210.72.69.148/3010.72.69.149 – 10.72.69.15010.72.69.151
10310.72.69.152/3010.72.69.153 – 10.72.69.15410.72.69.155
10410.72.69.156/3010.72.69.157 – 10.72.69.15810.72.69.159
10510.72.69.160/3010.72.69.161 – 10.72.69.16210.72.69.163
10610.72.69.164/3010.72.69.165 – 10.72.69.16610.72.69.167
10710.72.69.168/3010.72.69.169 – 10.72.69.17010.72.69.171
10810.72.69.172/3010.72.69.173 – 10.72.69.17410.72.69.175
10910.72.69.176/3010.72.69.177 – 10.72.69.17810.72.69.179
11010.72.69.180/3010.72.69.181 – 10.72.69.18210.72.69.183
11110.72.69.184/3010.72.69.185 – 10.72.69.18610.72.69.187
11210.72.69.188/3010.72.69.189 – 10.72.69.19010.72.69.191
11310.72.69.192/3010.72.69.193 – 10.72.69.19410.72.69.195
11410.72.69.196/3010.72.69.197 – 10.72.69.19810.72.69.199
11510.72.69.200/3010.72.69.201 – 10.72.69.20210.72.69.203
11610.72.69.204/3010.72.69.205 – 10.72.69.20610.72.69.207
11710.72.69.208/3010.72.69.209 – 10.72.69.21010.72.69.211
11810.72.69.212/3010.72.69.213 – 10.72.69.21410.72.69.215
11910.72.69.216/3010.72.69.217 – 10.72.69.21810.72.69.219
12010.72.69.220/3010.72.69.221 – 10.72.69.22210.72.69.223
12110.72.69.224/3010.72.69.225 – 10.72.69.22610.72.69.227
12210.72.69.228/3010.72.69.229 – 10.72.69.23010.72.69.231
12310.72.69.232/3010.72.69.233 – 10.72.69.23410.72.69.235
12410.72.69.236/3010.72.69.237 – 10.72.69.23810.72.69.239
12510.72.69.240/3010.72.69.241 – 10.72.69.24210.72.69.243
12610.72.69.244/3010.72.69.245 – 10.72.69.24610.72.69.247
12710.72.69.248/3010.72.69.249 – 10.72.69.25010.72.69.251
12810.72.69.252/3010.72.69.253 – 10.72.69.25410.72.69.255
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 →