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)10.72.38.0/23
network10.72.38.0/23
broadcast10.72.39.255
first host10.72.38.1
last host10.72.39.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.72.38.0/23
address00001010.01001000.00100110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001000.00100110.00000000
broadcast00001010.01001000.00100111.11111111
green = network part, grey = host part
hex0x0a482600
decimal172500480
reverse dns0.38.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:2600

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.38.0/3010.72.38.1 – 10.72.38.210.72.38.3
210.72.38.4/3010.72.38.5 – 10.72.38.610.72.38.7
310.72.38.8/3010.72.38.9 – 10.72.38.1010.72.38.11
410.72.38.12/3010.72.38.13 – 10.72.38.1410.72.38.15
510.72.38.16/3010.72.38.17 – 10.72.38.1810.72.38.19
610.72.38.20/3010.72.38.21 – 10.72.38.2210.72.38.23
710.72.38.24/3010.72.38.25 – 10.72.38.2610.72.38.27
810.72.38.28/3010.72.38.29 – 10.72.38.3010.72.38.31
910.72.38.32/3010.72.38.33 – 10.72.38.3410.72.38.35
1010.72.38.36/3010.72.38.37 – 10.72.38.3810.72.38.39
1110.72.38.40/3010.72.38.41 – 10.72.38.4210.72.38.43
1210.72.38.44/3010.72.38.45 – 10.72.38.4610.72.38.47
1310.72.38.48/3010.72.38.49 – 10.72.38.5010.72.38.51
1410.72.38.52/3010.72.38.53 – 10.72.38.5410.72.38.55
1510.72.38.56/3010.72.38.57 – 10.72.38.5810.72.38.59
1610.72.38.60/3010.72.38.61 – 10.72.38.6210.72.38.63
1710.72.38.64/3010.72.38.65 – 10.72.38.6610.72.38.67
1810.72.38.68/3010.72.38.69 – 10.72.38.7010.72.38.71
1910.72.38.72/3010.72.38.73 – 10.72.38.7410.72.38.75
2010.72.38.76/3010.72.38.77 – 10.72.38.7810.72.38.79
2110.72.38.80/3010.72.38.81 – 10.72.38.8210.72.38.83
2210.72.38.84/3010.72.38.85 – 10.72.38.8610.72.38.87
2310.72.38.88/3010.72.38.89 – 10.72.38.9010.72.38.91
2410.72.38.92/3010.72.38.93 – 10.72.38.9410.72.38.95
2510.72.38.96/3010.72.38.97 – 10.72.38.9810.72.38.99
2610.72.38.100/3010.72.38.101 – 10.72.38.10210.72.38.103
2710.72.38.104/3010.72.38.105 – 10.72.38.10610.72.38.107
2810.72.38.108/3010.72.38.109 – 10.72.38.11010.72.38.111
2910.72.38.112/3010.72.38.113 – 10.72.38.11410.72.38.115
3010.72.38.116/3010.72.38.117 – 10.72.38.11810.72.38.119
3110.72.38.120/3010.72.38.121 – 10.72.38.12210.72.38.123
3210.72.38.124/3010.72.38.125 – 10.72.38.12610.72.38.127
3310.72.38.128/3010.72.38.129 – 10.72.38.13010.72.38.131
3410.72.38.132/3010.72.38.133 – 10.72.38.13410.72.38.135
3510.72.38.136/3010.72.38.137 – 10.72.38.13810.72.38.139
3610.72.38.140/3010.72.38.141 – 10.72.38.14210.72.38.143
3710.72.38.144/3010.72.38.145 – 10.72.38.14610.72.38.147
3810.72.38.148/3010.72.38.149 – 10.72.38.15010.72.38.151
3910.72.38.152/3010.72.38.153 – 10.72.38.15410.72.38.155
4010.72.38.156/3010.72.38.157 – 10.72.38.15810.72.38.159
4110.72.38.160/3010.72.38.161 – 10.72.38.16210.72.38.163
4210.72.38.164/3010.72.38.165 – 10.72.38.16610.72.38.167
4310.72.38.168/3010.72.38.169 – 10.72.38.17010.72.38.171
4410.72.38.172/3010.72.38.173 – 10.72.38.17410.72.38.175
4510.72.38.176/3010.72.38.177 – 10.72.38.17810.72.38.179
4610.72.38.180/3010.72.38.181 – 10.72.38.18210.72.38.183
4710.72.38.184/3010.72.38.185 – 10.72.38.18610.72.38.187
4810.72.38.188/3010.72.38.189 – 10.72.38.19010.72.38.191
4910.72.38.192/3010.72.38.193 – 10.72.38.19410.72.38.195
5010.72.38.196/3010.72.38.197 – 10.72.38.19810.72.38.199
5110.72.38.200/3010.72.38.201 – 10.72.38.20210.72.38.203
5210.72.38.204/3010.72.38.205 – 10.72.38.20610.72.38.207
5310.72.38.208/3010.72.38.209 – 10.72.38.21010.72.38.211
5410.72.38.212/3010.72.38.213 – 10.72.38.21410.72.38.215
5510.72.38.216/3010.72.38.217 – 10.72.38.21810.72.38.219
5610.72.38.220/3010.72.38.221 – 10.72.38.22210.72.38.223
5710.72.38.224/3010.72.38.225 – 10.72.38.22610.72.38.227
5810.72.38.228/3010.72.38.229 – 10.72.38.23010.72.38.231
5910.72.38.232/3010.72.38.233 – 10.72.38.23410.72.38.235
6010.72.38.236/3010.72.38.237 – 10.72.38.23810.72.38.239
6110.72.38.240/3010.72.38.241 – 10.72.38.24210.72.38.243
6210.72.38.244/3010.72.38.245 – 10.72.38.24610.72.38.247
6310.72.38.248/3010.72.38.249 – 10.72.38.25010.72.38.251
6410.72.38.252/3010.72.38.253 – 10.72.38.25410.72.38.255
6510.72.39.0/3010.72.39.1 – 10.72.39.210.72.39.3
6610.72.39.4/3010.72.39.5 – 10.72.39.610.72.39.7
6710.72.39.8/3010.72.39.9 – 10.72.39.1010.72.39.11
6810.72.39.12/3010.72.39.13 – 10.72.39.1410.72.39.15
6910.72.39.16/3010.72.39.17 – 10.72.39.1810.72.39.19
7010.72.39.20/3010.72.39.21 – 10.72.39.2210.72.39.23
7110.72.39.24/3010.72.39.25 – 10.72.39.2610.72.39.27
7210.72.39.28/3010.72.39.29 – 10.72.39.3010.72.39.31
7310.72.39.32/3010.72.39.33 – 10.72.39.3410.72.39.35
7410.72.39.36/3010.72.39.37 – 10.72.39.3810.72.39.39
7510.72.39.40/3010.72.39.41 – 10.72.39.4210.72.39.43
7610.72.39.44/3010.72.39.45 – 10.72.39.4610.72.39.47
7710.72.39.48/3010.72.39.49 – 10.72.39.5010.72.39.51
7810.72.39.52/3010.72.39.53 – 10.72.39.5410.72.39.55
7910.72.39.56/3010.72.39.57 – 10.72.39.5810.72.39.59
8010.72.39.60/3010.72.39.61 – 10.72.39.6210.72.39.63
8110.72.39.64/3010.72.39.65 – 10.72.39.6610.72.39.67
8210.72.39.68/3010.72.39.69 – 10.72.39.7010.72.39.71
8310.72.39.72/3010.72.39.73 – 10.72.39.7410.72.39.75
8410.72.39.76/3010.72.39.77 – 10.72.39.7810.72.39.79
8510.72.39.80/3010.72.39.81 – 10.72.39.8210.72.39.83
8610.72.39.84/3010.72.39.85 – 10.72.39.8610.72.39.87
8710.72.39.88/3010.72.39.89 – 10.72.39.9010.72.39.91
8810.72.39.92/3010.72.39.93 – 10.72.39.9410.72.39.95
8910.72.39.96/3010.72.39.97 – 10.72.39.9810.72.39.99
9010.72.39.100/3010.72.39.101 – 10.72.39.10210.72.39.103
9110.72.39.104/3010.72.39.105 – 10.72.39.10610.72.39.107
9210.72.39.108/3010.72.39.109 – 10.72.39.11010.72.39.111
9310.72.39.112/3010.72.39.113 – 10.72.39.11410.72.39.115
9410.72.39.116/3010.72.39.117 – 10.72.39.11810.72.39.119
9510.72.39.120/3010.72.39.121 – 10.72.39.12210.72.39.123
9610.72.39.124/3010.72.39.125 – 10.72.39.12610.72.39.127
9710.72.39.128/3010.72.39.129 – 10.72.39.13010.72.39.131
9810.72.39.132/3010.72.39.133 – 10.72.39.13410.72.39.135
9910.72.39.136/3010.72.39.137 – 10.72.39.13810.72.39.139
10010.72.39.140/3010.72.39.141 – 10.72.39.14210.72.39.143
10110.72.39.144/3010.72.39.145 – 10.72.39.14610.72.39.147
10210.72.39.148/3010.72.39.149 – 10.72.39.15010.72.39.151
10310.72.39.152/3010.72.39.153 – 10.72.39.15410.72.39.155
10410.72.39.156/3010.72.39.157 – 10.72.39.15810.72.39.159
10510.72.39.160/3010.72.39.161 – 10.72.39.16210.72.39.163
10610.72.39.164/3010.72.39.165 – 10.72.39.16610.72.39.167
10710.72.39.168/3010.72.39.169 – 10.72.39.17010.72.39.171
10810.72.39.172/3010.72.39.173 – 10.72.39.17410.72.39.175
10910.72.39.176/3010.72.39.177 – 10.72.39.17810.72.39.179
11010.72.39.180/3010.72.39.181 – 10.72.39.18210.72.39.183
11110.72.39.184/3010.72.39.185 – 10.72.39.18610.72.39.187
11210.72.39.188/3010.72.39.189 – 10.72.39.19010.72.39.191
11310.72.39.192/3010.72.39.193 – 10.72.39.19410.72.39.195
11410.72.39.196/3010.72.39.197 – 10.72.39.19810.72.39.199
11510.72.39.200/3010.72.39.201 – 10.72.39.20210.72.39.203
11610.72.39.204/3010.72.39.205 – 10.72.39.20610.72.39.207
11710.72.39.208/3010.72.39.209 – 10.72.39.21010.72.39.211
11810.72.39.212/3010.72.39.213 – 10.72.39.21410.72.39.215
11910.72.39.216/3010.72.39.217 – 10.72.39.21810.72.39.219
12010.72.39.220/3010.72.39.221 – 10.72.39.22210.72.39.223
12110.72.39.224/3010.72.39.225 – 10.72.39.22610.72.39.227
12210.72.39.228/3010.72.39.229 – 10.72.39.23010.72.39.231
12310.72.39.232/3010.72.39.233 – 10.72.39.23410.72.39.235
12410.72.39.236/3010.72.39.237 – 10.72.39.23810.72.39.239
12510.72.39.240/3010.72.39.241 – 10.72.39.24210.72.39.243
12610.72.39.244/3010.72.39.245 – 10.72.39.24610.72.39.247
12710.72.39.248/3010.72.39.249 – 10.72.39.25010.72.39.251
12810.72.39.252/3010.72.39.253 – 10.72.39.25410.72.39.255
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 →