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)10.72.48.0/23
network10.72.48.0/23
broadcast10.72.49.255
first host10.72.48.1
last host10.72.49.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.72.48.0/23
address00001010.01001000.00110000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001000.00110000.00000000
broadcast00001010.01001000.00110001.11111111
green = network part, grey = host part
hex0x0a483000
decimal172503040
reverse dns0.48.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:3000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.48.0/3010.72.48.1 – 10.72.48.210.72.48.3
210.72.48.4/3010.72.48.5 – 10.72.48.610.72.48.7
310.72.48.8/3010.72.48.9 – 10.72.48.1010.72.48.11
410.72.48.12/3010.72.48.13 – 10.72.48.1410.72.48.15
510.72.48.16/3010.72.48.17 – 10.72.48.1810.72.48.19
610.72.48.20/3010.72.48.21 – 10.72.48.2210.72.48.23
710.72.48.24/3010.72.48.25 – 10.72.48.2610.72.48.27
810.72.48.28/3010.72.48.29 – 10.72.48.3010.72.48.31
910.72.48.32/3010.72.48.33 – 10.72.48.3410.72.48.35
1010.72.48.36/3010.72.48.37 – 10.72.48.3810.72.48.39
1110.72.48.40/3010.72.48.41 – 10.72.48.4210.72.48.43
1210.72.48.44/3010.72.48.45 – 10.72.48.4610.72.48.47
1310.72.48.48/3010.72.48.49 – 10.72.48.5010.72.48.51
1410.72.48.52/3010.72.48.53 – 10.72.48.5410.72.48.55
1510.72.48.56/3010.72.48.57 – 10.72.48.5810.72.48.59
1610.72.48.60/3010.72.48.61 – 10.72.48.6210.72.48.63
1710.72.48.64/3010.72.48.65 – 10.72.48.6610.72.48.67
1810.72.48.68/3010.72.48.69 – 10.72.48.7010.72.48.71
1910.72.48.72/3010.72.48.73 – 10.72.48.7410.72.48.75
2010.72.48.76/3010.72.48.77 – 10.72.48.7810.72.48.79
2110.72.48.80/3010.72.48.81 – 10.72.48.8210.72.48.83
2210.72.48.84/3010.72.48.85 – 10.72.48.8610.72.48.87
2310.72.48.88/3010.72.48.89 – 10.72.48.9010.72.48.91
2410.72.48.92/3010.72.48.93 – 10.72.48.9410.72.48.95
2510.72.48.96/3010.72.48.97 – 10.72.48.9810.72.48.99
2610.72.48.100/3010.72.48.101 – 10.72.48.10210.72.48.103
2710.72.48.104/3010.72.48.105 – 10.72.48.10610.72.48.107
2810.72.48.108/3010.72.48.109 – 10.72.48.11010.72.48.111
2910.72.48.112/3010.72.48.113 – 10.72.48.11410.72.48.115
3010.72.48.116/3010.72.48.117 – 10.72.48.11810.72.48.119
3110.72.48.120/3010.72.48.121 – 10.72.48.12210.72.48.123
3210.72.48.124/3010.72.48.125 – 10.72.48.12610.72.48.127
3310.72.48.128/3010.72.48.129 – 10.72.48.13010.72.48.131
3410.72.48.132/3010.72.48.133 – 10.72.48.13410.72.48.135
3510.72.48.136/3010.72.48.137 – 10.72.48.13810.72.48.139
3610.72.48.140/3010.72.48.141 – 10.72.48.14210.72.48.143
3710.72.48.144/3010.72.48.145 – 10.72.48.14610.72.48.147
3810.72.48.148/3010.72.48.149 – 10.72.48.15010.72.48.151
3910.72.48.152/3010.72.48.153 – 10.72.48.15410.72.48.155
4010.72.48.156/3010.72.48.157 – 10.72.48.15810.72.48.159
4110.72.48.160/3010.72.48.161 – 10.72.48.16210.72.48.163
4210.72.48.164/3010.72.48.165 – 10.72.48.16610.72.48.167
4310.72.48.168/3010.72.48.169 – 10.72.48.17010.72.48.171
4410.72.48.172/3010.72.48.173 – 10.72.48.17410.72.48.175
4510.72.48.176/3010.72.48.177 – 10.72.48.17810.72.48.179
4610.72.48.180/3010.72.48.181 – 10.72.48.18210.72.48.183
4710.72.48.184/3010.72.48.185 – 10.72.48.18610.72.48.187
4810.72.48.188/3010.72.48.189 – 10.72.48.19010.72.48.191
4910.72.48.192/3010.72.48.193 – 10.72.48.19410.72.48.195
5010.72.48.196/3010.72.48.197 – 10.72.48.19810.72.48.199
5110.72.48.200/3010.72.48.201 – 10.72.48.20210.72.48.203
5210.72.48.204/3010.72.48.205 – 10.72.48.20610.72.48.207
5310.72.48.208/3010.72.48.209 – 10.72.48.21010.72.48.211
5410.72.48.212/3010.72.48.213 – 10.72.48.21410.72.48.215
5510.72.48.216/3010.72.48.217 – 10.72.48.21810.72.48.219
5610.72.48.220/3010.72.48.221 – 10.72.48.22210.72.48.223
5710.72.48.224/3010.72.48.225 – 10.72.48.22610.72.48.227
5810.72.48.228/3010.72.48.229 – 10.72.48.23010.72.48.231
5910.72.48.232/3010.72.48.233 – 10.72.48.23410.72.48.235
6010.72.48.236/3010.72.48.237 – 10.72.48.23810.72.48.239
6110.72.48.240/3010.72.48.241 – 10.72.48.24210.72.48.243
6210.72.48.244/3010.72.48.245 – 10.72.48.24610.72.48.247
6310.72.48.248/3010.72.48.249 – 10.72.48.25010.72.48.251
6410.72.48.252/3010.72.48.253 – 10.72.48.25410.72.48.255
6510.72.49.0/3010.72.49.1 – 10.72.49.210.72.49.3
6610.72.49.4/3010.72.49.5 – 10.72.49.610.72.49.7
6710.72.49.8/3010.72.49.9 – 10.72.49.1010.72.49.11
6810.72.49.12/3010.72.49.13 – 10.72.49.1410.72.49.15
6910.72.49.16/3010.72.49.17 – 10.72.49.1810.72.49.19
7010.72.49.20/3010.72.49.21 – 10.72.49.2210.72.49.23
7110.72.49.24/3010.72.49.25 – 10.72.49.2610.72.49.27
7210.72.49.28/3010.72.49.29 – 10.72.49.3010.72.49.31
7310.72.49.32/3010.72.49.33 – 10.72.49.3410.72.49.35
7410.72.49.36/3010.72.49.37 – 10.72.49.3810.72.49.39
7510.72.49.40/3010.72.49.41 – 10.72.49.4210.72.49.43
7610.72.49.44/3010.72.49.45 – 10.72.49.4610.72.49.47
7710.72.49.48/3010.72.49.49 – 10.72.49.5010.72.49.51
7810.72.49.52/3010.72.49.53 – 10.72.49.5410.72.49.55
7910.72.49.56/3010.72.49.57 – 10.72.49.5810.72.49.59
8010.72.49.60/3010.72.49.61 – 10.72.49.6210.72.49.63
8110.72.49.64/3010.72.49.65 – 10.72.49.6610.72.49.67
8210.72.49.68/3010.72.49.69 – 10.72.49.7010.72.49.71
8310.72.49.72/3010.72.49.73 – 10.72.49.7410.72.49.75
8410.72.49.76/3010.72.49.77 – 10.72.49.7810.72.49.79
8510.72.49.80/3010.72.49.81 – 10.72.49.8210.72.49.83
8610.72.49.84/3010.72.49.85 – 10.72.49.8610.72.49.87
8710.72.49.88/3010.72.49.89 – 10.72.49.9010.72.49.91
8810.72.49.92/3010.72.49.93 – 10.72.49.9410.72.49.95
8910.72.49.96/3010.72.49.97 – 10.72.49.9810.72.49.99
9010.72.49.100/3010.72.49.101 – 10.72.49.10210.72.49.103
9110.72.49.104/3010.72.49.105 – 10.72.49.10610.72.49.107
9210.72.49.108/3010.72.49.109 – 10.72.49.11010.72.49.111
9310.72.49.112/3010.72.49.113 – 10.72.49.11410.72.49.115
9410.72.49.116/3010.72.49.117 – 10.72.49.11810.72.49.119
9510.72.49.120/3010.72.49.121 – 10.72.49.12210.72.49.123
9610.72.49.124/3010.72.49.125 – 10.72.49.12610.72.49.127
9710.72.49.128/3010.72.49.129 – 10.72.49.13010.72.49.131
9810.72.49.132/3010.72.49.133 – 10.72.49.13410.72.49.135
9910.72.49.136/3010.72.49.137 – 10.72.49.13810.72.49.139
10010.72.49.140/3010.72.49.141 – 10.72.49.14210.72.49.143
10110.72.49.144/3010.72.49.145 – 10.72.49.14610.72.49.147
10210.72.49.148/3010.72.49.149 – 10.72.49.15010.72.49.151
10310.72.49.152/3010.72.49.153 – 10.72.49.15410.72.49.155
10410.72.49.156/3010.72.49.157 – 10.72.49.15810.72.49.159
10510.72.49.160/3010.72.49.161 – 10.72.49.16210.72.49.163
10610.72.49.164/3010.72.49.165 – 10.72.49.16610.72.49.167
10710.72.49.168/3010.72.49.169 – 10.72.49.17010.72.49.171
10810.72.49.172/3010.72.49.173 – 10.72.49.17410.72.49.175
10910.72.49.176/3010.72.49.177 – 10.72.49.17810.72.49.179
11010.72.49.180/3010.72.49.181 – 10.72.49.18210.72.49.183
11110.72.49.184/3010.72.49.185 – 10.72.49.18610.72.49.187
11210.72.49.188/3010.72.49.189 – 10.72.49.19010.72.49.191
11310.72.49.192/3010.72.49.193 – 10.72.49.19410.72.49.195
11410.72.49.196/3010.72.49.197 – 10.72.49.19810.72.49.199
11510.72.49.200/3010.72.49.201 – 10.72.49.20210.72.49.203
11610.72.49.204/3010.72.49.205 – 10.72.49.20610.72.49.207
11710.72.49.208/3010.72.49.209 – 10.72.49.21010.72.49.211
11810.72.49.212/3010.72.49.213 – 10.72.49.21410.72.49.215
11910.72.49.216/3010.72.49.217 – 10.72.49.21810.72.49.219
12010.72.49.220/3010.72.49.221 – 10.72.49.22210.72.49.223
12110.72.49.224/3010.72.49.225 – 10.72.49.22610.72.49.227
12210.72.49.228/3010.72.49.229 – 10.72.49.23010.72.49.231
12310.72.49.232/3010.72.49.233 – 10.72.49.23410.72.49.235
12410.72.49.236/3010.72.49.237 – 10.72.49.23810.72.49.239
12510.72.49.240/3010.72.49.241 – 10.72.49.24210.72.49.243
12610.72.49.244/3010.72.49.245 – 10.72.49.24610.72.49.247
12710.72.49.248/3010.72.49.249 – 10.72.49.25010.72.49.251
12810.72.49.252/3010.72.49.253 – 10.72.49.25410.72.49.255
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 →