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)10.72.158.0/23
network10.72.158.0/23
broadcast10.72.159.255
first host10.72.158.1
last host10.72.159.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.72.158.0/23
address00001010.01001000.10011110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001000.10011110.00000000
broadcast00001010.01001000.10011111.11111111
green = network part, grey = host part
hex0x0a489e00
decimal172531200
reverse dns0.158.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:9e00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.158.0/3010.72.158.1 – 10.72.158.210.72.158.3
210.72.158.4/3010.72.158.5 – 10.72.158.610.72.158.7
310.72.158.8/3010.72.158.9 – 10.72.158.1010.72.158.11
410.72.158.12/3010.72.158.13 – 10.72.158.1410.72.158.15
510.72.158.16/3010.72.158.17 – 10.72.158.1810.72.158.19
610.72.158.20/3010.72.158.21 – 10.72.158.2210.72.158.23
710.72.158.24/3010.72.158.25 – 10.72.158.2610.72.158.27
810.72.158.28/3010.72.158.29 – 10.72.158.3010.72.158.31
910.72.158.32/3010.72.158.33 – 10.72.158.3410.72.158.35
1010.72.158.36/3010.72.158.37 – 10.72.158.3810.72.158.39
1110.72.158.40/3010.72.158.41 – 10.72.158.4210.72.158.43
1210.72.158.44/3010.72.158.45 – 10.72.158.4610.72.158.47
1310.72.158.48/3010.72.158.49 – 10.72.158.5010.72.158.51
1410.72.158.52/3010.72.158.53 – 10.72.158.5410.72.158.55
1510.72.158.56/3010.72.158.57 – 10.72.158.5810.72.158.59
1610.72.158.60/3010.72.158.61 – 10.72.158.6210.72.158.63
1710.72.158.64/3010.72.158.65 – 10.72.158.6610.72.158.67
1810.72.158.68/3010.72.158.69 – 10.72.158.7010.72.158.71
1910.72.158.72/3010.72.158.73 – 10.72.158.7410.72.158.75
2010.72.158.76/3010.72.158.77 – 10.72.158.7810.72.158.79
2110.72.158.80/3010.72.158.81 – 10.72.158.8210.72.158.83
2210.72.158.84/3010.72.158.85 – 10.72.158.8610.72.158.87
2310.72.158.88/3010.72.158.89 – 10.72.158.9010.72.158.91
2410.72.158.92/3010.72.158.93 – 10.72.158.9410.72.158.95
2510.72.158.96/3010.72.158.97 – 10.72.158.9810.72.158.99
2610.72.158.100/3010.72.158.101 – 10.72.158.10210.72.158.103
2710.72.158.104/3010.72.158.105 – 10.72.158.10610.72.158.107
2810.72.158.108/3010.72.158.109 – 10.72.158.11010.72.158.111
2910.72.158.112/3010.72.158.113 – 10.72.158.11410.72.158.115
3010.72.158.116/3010.72.158.117 – 10.72.158.11810.72.158.119
3110.72.158.120/3010.72.158.121 – 10.72.158.12210.72.158.123
3210.72.158.124/3010.72.158.125 – 10.72.158.12610.72.158.127
3310.72.158.128/3010.72.158.129 – 10.72.158.13010.72.158.131
3410.72.158.132/3010.72.158.133 – 10.72.158.13410.72.158.135
3510.72.158.136/3010.72.158.137 – 10.72.158.13810.72.158.139
3610.72.158.140/3010.72.158.141 – 10.72.158.14210.72.158.143
3710.72.158.144/3010.72.158.145 – 10.72.158.14610.72.158.147
3810.72.158.148/3010.72.158.149 – 10.72.158.15010.72.158.151
3910.72.158.152/3010.72.158.153 – 10.72.158.15410.72.158.155
4010.72.158.156/3010.72.158.157 – 10.72.158.15810.72.158.159
4110.72.158.160/3010.72.158.161 – 10.72.158.16210.72.158.163
4210.72.158.164/3010.72.158.165 – 10.72.158.16610.72.158.167
4310.72.158.168/3010.72.158.169 – 10.72.158.17010.72.158.171
4410.72.158.172/3010.72.158.173 – 10.72.158.17410.72.158.175
4510.72.158.176/3010.72.158.177 – 10.72.158.17810.72.158.179
4610.72.158.180/3010.72.158.181 – 10.72.158.18210.72.158.183
4710.72.158.184/3010.72.158.185 – 10.72.158.18610.72.158.187
4810.72.158.188/3010.72.158.189 – 10.72.158.19010.72.158.191
4910.72.158.192/3010.72.158.193 – 10.72.158.19410.72.158.195
5010.72.158.196/3010.72.158.197 – 10.72.158.19810.72.158.199
5110.72.158.200/3010.72.158.201 – 10.72.158.20210.72.158.203
5210.72.158.204/3010.72.158.205 – 10.72.158.20610.72.158.207
5310.72.158.208/3010.72.158.209 – 10.72.158.21010.72.158.211
5410.72.158.212/3010.72.158.213 – 10.72.158.21410.72.158.215
5510.72.158.216/3010.72.158.217 – 10.72.158.21810.72.158.219
5610.72.158.220/3010.72.158.221 – 10.72.158.22210.72.158.223
5710.72.158.224/3010.72.158.225 – 10.72.158.22610.72.158.227
5810.72.158.228/3010.72.158.229 – 10.72.158.23010.72.158.231
5910.72.158.232/3010.72.158.233 – 10.72.158.23410.72.158.235
6010.72.158.236/3010.72.158.237 – 10.72.158.23810.72.158.239
6110.72.158.240/3010.72.158.241 – 10.72.158.24210.72.158.243
6210.72.158.244/3010.72.158.245 – 10.72.158.24610.72.158.247
6310.72.158.248/3010.72.158.249 – 10.72.158.25010.72.158.251
6410.72.158.252/3010.72.158.253 – 10.72.158.25410.72.158.255
6510.72.159.0/3010.72.159.1 – 10.72.159.210.72.159.3
6610.72.159.4/3010.72.159.5 – 10.72.159.610.72.159.7
6710.72.159.8/3010.72.159.9 – 10.72.159.1010.72.159.11
6810.72.159.12/3010.72.159.13 – 10.72.159.1410.72.159.15
6910.72.159.16/3010.72.159.17 – 10.72.159.1810.72.159.19
7010.72.159.20/3010.72.159.21 – 10.72.159.2210.72.159.23
7110.72.159.24/3010.72.159.25 – 10.72.159.2610.72.159.27
7210.72.159.28/3010.72.159.29 – 10.72.159.3010.72.159.31
7310.72.159.32/3010.72.159.33 – 10.72.159.3410.72.159.35
7410.72.159.36/3010.72.159.37 – 10.72.159.3810.72.159.39
7510.72.159.40/3010.72.159.41 – 10.72.159.4210.72.159.43
7610.72.159.44/3010.72.159.45 – 10.72.159.4610.72.159.47
7710.72.159.48/3010.72.159.49 – 10.72.159.5010.72.159.51
7810.72.159.52/3010.72.159.53 – 10.72.159.5410.72.159.55
7910.72.159.56/3010.72.159.57 – 10.72.159.5810.72.159.59
8010.72.159.60/3010.72.159.61 – 10.72.159.6210.72.159.63
8110.72.159.64/3010.72.159.65 – 10.72.159.6610.72.159.67
8210.72.159.68/3010.72.159.69 – 10.72.159.7010.72.159.71
8310.72.159.72/3010.72.159.73 – 10.72.159.7410.72.159.75
8410.72.159.76/3010.72.159.77 – 10.72.159.7810.72.159.79
8510.72.159.80/3010.72.159.81 – 10.72.159.8210.72.159.83
8610.72.159.84/3010.72.159.85 – 10.72.159.8610.72.159.87
8710.72.159.88/3010.72.159.89 – 10.72.159.9010.72.159.91
8810.72.159.92/3010.72.159.93 – 10.72.159.9410.72.159.95
8910.72.159.96/3010.72.159.97 – 10.72.159.9810.72.159.99
9010.72.159.100/3010.72.159.101 – 10.72.159.10210.72.159.103
9110.72.159.104/3010.72.159.105 – 10.72.159.10610.72.159.107
9210.72.159.108/3010.72.159.109 – 10.72.159.11010.72.159.111
9310.72.159.112/3010.72.159.113 – 10.72.159.11410.72.159.115
9410.72.159.116/3010.72.159.117 – 10.72.159.11810.72.159.119
9510.72.159.120/3010.72.159.121 – 10.72.159.12210.72.159.123
9610.72.159.124/3010.72.159.125 – 10.72.159.12610.72.159.127
9710.72.159.128/3010.72.159.129 – 10.72.159.13010.72.159.131
9810.72.159.132/3010.72.159.133 – 10.72.159.13410.72.159.135
9910.72.159.136/3010.72.159.137 – 10.72.159.13810.72.159.139
10010.72.159.140/3010.72.159.141 – 10.72.159.14210.72.159.143
10110.72.159.144/3010.72.159.145 – 10.72.159.14610.72.159.147
10210.72.159.148/3010.72.159.149 – 10.72.159.15010.72.159.151
10310.72.159.152/3010.72.159.153 – 10.72.159.15410.72.159.155
10410.72.159.156/3010.72.159.157 – 10.72.159.15810.72.159.159
10510.72.159.160/3010.72.159.161 – 10.72.159.16210.72.159.163
10610.72.159.164/3010.72.159.165 – 10.72.159.16610.72.159.167
10710.72.159.168/3010.72.159.169 – 10.72.159.17010.72.159.171
10810.72.159.172/3010.72.159.173 – 10.72.159.17410.72.159.175
10910.72.159.176/3010.72.159.177 – 10.72.159.17810.72.159.179
11010.72.159.180/3010.72.159.181 – 10.72.159.18210.72.159.183
11110.72.159.184/3010.72.159.185 – 10.72.159.18610.72.159.187
11210.72.159.188/3010.72.159.189 – 10.72.159.19010.72.159.191
11310.72.159.192/3010.72.159.193 – 10.72.159.19410.72.159.195
11410.72.159.196/3010.72.159.197 – 10.72.159.19810.72.159.199
11510.72.159.200/3010.72.159.201 – 10.72.159.20210.72.159.203
11610.72.159.204/3010.72.159.205 – 10.72.159.20610.72.159.207
11710.72.159.208/3010.72.159.209 – 10.72.159.21010.72.159.211
11810.72.159.212/3010.72.159.213 – 10.72.159.21410.72.159.215
11910.72.159.216/3010.72.159.217 – 10.72.159.21810.72.159.219
12010.72.159.220/3010.72.159.221 – 10.72.159.22210.72.159.223
12110.72.159.224/3010.72.159.225 – 10.72.159.22610.72.159.227
12210.72.159.228/3010.72.159.229 – 10.72.159.23010.72.159.231
12310.72.159.232/3010.72.159.233 – 10.72.159.23410.72.159.235
12410.72.159.236/3010.72.159.237 – 10.72.159.23810.72.159.239
12510.72.159.240/3010.72.159.241 – 10.72.159.24210.72.159.243
12610.72.159.244/3010.72.159.245 – 10.72.159.24610.72.159.247
12710.72.159.248/3010.72.159.249 – 10.72.159.25010.72.159.251
12810.72.159.252/3010.72.159.253 – 10.72.159.25410.72.159.255
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 →