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)10.72.78.0/23
network10.72.78.0/23
broadcast10.72.79.255
first host10.72.78.1
last host10.72.79.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.72.78.0/23
address00001010.01001000.01001110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001000.01001110.00000000
broadcast00001010.01001000.01001111.11111111
green = network part, grey = host part
hex0x0a484e00
decimal172510720
reverse dns0.78.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:4e00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.72.78.0/3010.72.78.1 – 10.72.78.210.72.78.3
210.72.78.4/3010.72.78.5 – 10.72.78.610.72.78.7
310.72.78.8/3010.72.78.9 – 10.72.78.1010.72.78.11
410.72.78.12/3010.72.78.13 – 10.72.78.1410.72.78.15
510.72.78.16/3010.72.78.17 – 10.72.78.1810.72.78.19
610.72.78.20/3010.72.78.21 – 10.72.78.2210.72.78.23
710.72.78.24/3010.72.78.25 – 10.72.78.2610.72.78.27
810.72.78.28/3010.72.78.29 – 10.72.78.3010.72.78.31
910.72.78.32/3010.72.78.33 – 10.72.78.3410.72.78.35
1010.72.78.36/3010.72.78.37 – 10.72.78.3810.72.78.39
1110.72.78.40/3010.72.78.41 – 10.72.78.4210.72.78.43
1210.72.78.44/3010.72.78.45 – 10.72.78.4610.72.78.47
1310.72.78.48/3010.72.78.49 – 10.72.78.5010.72.78.51
1410.72.78.52/3010.72.78.53 – 10.72.78.5410.72.78.55
1510.72.78.56/3010.72.78.57 – 10.72.78.5810.72.78.59
1610.72.78.60/3010.72.78.61 – 10.72.78.6210.72.78.63
1710.72.78.64/3010.72.78.65 – 10.72.78.6610.72.78.67
1810.72.78.68/3010.72.78.69 – 10.72.78.7010.72.78.71
1910.72.78.72/3010.72.78.73 – 10.72.78.7410.72.78.75
2010.72.78.76/3010.72.78.77 – 10.72.78.7810.72.78.79
2110.72.78.80/3010.72.78.81 – 10.72.78.8210.72.78.83
2210.72.78.84/3010.72.78.85 – 10.72.78.8610.72.78.87
2310.72.78.88/3010.72.78.89 – 10.72.78.9010.72.78.91
2410.72.78.92/3010.72.78.93 – 10.72.78.9410.72.78.95
2510.72.78.96/3010.72.78.97 – 10.72.78.9810.72.78.99
2610.72.78.100/3010.72.78.101 – 10.72.78.10210.72.78.103
2710.72.78.104/3010.72.78.105 – 10.72.78.10610.72.78.107
2810.72.78.108/3010.72.78.109 – 10.72.78.11010.72.78.111
2910.72.78.112/3010.72.78.113 – 10.72.78.11410.72.78.115
3010.72.78.116/3010.72.78.117 – 10.72.78.11810.72.78.119
3110.72.78.120/3010.72.78.121 – 10.72.78.12210.72.78.123
3210.72.78.124/3010.72.78.125 – 10.72.78.12610.72.78.127
3310.72.78.128/3010.72.78.129 – 10.72.78.13010.72.78.131
3410.72.78.132/3010.72.78.133 – 10.72.78.13410.72.78.135
3510.72.78.136/3010.72.78.137 – 10.72.78.13810.72.78.139
3610.72.78.140/3010.72.78.141 – 10.72.78.14210.72.78.143
3710.72.78.144/3010.72.78.145 – 10.72.78.14610.72.78.147
3810.72.78.148/3010.72.78.149 – 10.72.78.15010.72.78.151
3910.72.78.152/3010.72.78.153 – 10.72.78.15410.72.78.155
4010.72.78.156/3010.72.78.157 – 10.72.78.15810.72.78.159
4110.72.78.160/3010.72.78.161 – 10.72.78.16210.72.78.163
4210.72.78.164/3010.72.78.165 – 10.72.78.16610.72.78.167
4310.72.78.168/3010.72.78.169 – 10.72.78.17010.72.78.171
4410.72.78.172/3010.72.78.173 – 10.72.78.17410.72.78.175
4510.72.78.176/3010.72.78.177 – 10.72.78.17810.72.78.179
4610.72.78.180/3010.72.78.181 – 10.72.78.18210.72.78.183
4710.72.78.184/3010.72.78.185 – 10.72.78.18610.72.78.187
4810.72.78.188/3010.72.78.189 – 10.72.78.19010.72.78.191
4910.72.78.192/3010.72.78.193 – 10.72.78.19410.72.78.195
5010.72.78.196/3010.72.78.197 – 10.72.78.19810.72.78.199
5110.72.78.200/3010.72.78.201 – 10.72.78.20210.72.78.203
5210.72.78.204/3010.72.78.205 – 10.72.78.20610.72.78.207
5310.72.78.208/3010.72.78.209 – 10.72.78.21010.72.78.211
5410.72.78.212/3010.72.78.213 – 10.72.78.21410.72.78.215
5510.72.78.216/3010.72.78.217 – 10.72.78.21810.72.78.219
5610.72.78.220/3010.72.78.221 – 10.72.78.22210.72.78.223
5710.72.78.224/3010.72.78.225 – 10.72.78.22610.72.78.227
5810.72.78.228/3010.72.78.229 – 10.72.78.23010.72.78.231
5910.72.78.232/3010.72.78.233 – 10.72.78.23410.72.78.235
6010.72.78.236/3010.72.78.237 – 10.72.78.23810.72.78.239
6110.72.78.240/3010.72.78.241 – 10.72.78.24210.72.78.243
6210.72.78.244/3010.72.78.245 – 10.72.78.24610.72.78.247
6310.72.78.248/3010.72.78.249 – 10.72.78.25010.72.78.251
6410.72.78.252/3010.72.78.253 – 10.72.78.25410.72.78.255
6510.72.79.0/3010.72.79.1 – 10.72.79.210.72.79.3
6610.72.79.4/3010.72.79.5 – 10.72.79.610.72.79.7
6710.72.79.8/3010.72.79.9 – 10.72.79.1010.72.79.11
6810.72.79.12/3010.72.79.13 – 10.72.79.1410.72.79.15
6910.72.79.16/3010.72.79.17 – 10.72.79.1810.72.79.19
7010.72.79.20/3010.72.79.21 – 10.72.79.2210.72.79.23
7110.72.79.24/3010.72.79.25 – 10.72.79.2610.72.79.27
7210.72.79.28/3010.72.79.29 – 10.72.79.3010.72.79.31
7310.72.79.32/3010.72.79.33 – 10.72.79.3410.72.79.35
7410.72.79.36/3010.72.79.37 – 10.72.79.3810.72.79.39
7510.72.79.40/3010.72.79.41 – 10.72.79.4210.72.79.43
7610.72.79.44/3010.72.79.45 – 10.72.79.4610.72.79.47
7710.72.79.48/3010.72.79.49 – 10.72.79.5010.72.79.51
7810.72.79.52/3010.72.79.53 – 10.72.79.5410.72.79.55
7910.72.79.56/3010.72.79.57 – 10.72.79.5810.72.79.59
8010.72.79.60/3010.72.79.61 – 10.72.79.6210.72.79.63
8110.72.79.64/3010.72.79.65 – 10.72.79.6610.72.79.67
8210.72.79.68/3010.72.79.69 – 10.72.79.7010.72.79.71
8310.72.79.72/3010.72.79.73 – 10.72.79.7410.72.79.75
8410.72.79.76/3010.72.79.77 – 10.72.79.7810.72.79.79
8510.72.79.80/3010.72.79.81 – 10.72.79.8210.72.79.83
8610.72.79.84/3010.72.79.85 – 10.72.79.8610.72.79.87
8710.72.79.88/3010.72.79.89 – 10.72.79.9010.72.79.91
8810.72.79.92/3010.72.79.93 – 10.72.79.9410.72.79.95
8910.72.79.96/3010.72.79.97 – 10.72.79.9810.72.79.99
9010.72.79.100/3010.72.79.101 – 10.72.79.10210.72.79.103
9110.72.79.104/3010.72.79.105 – 10.72.79.10610.72.79.107
9210.72.79.108/3010.72.79.109 – 10.72.79.11010.72.79.111
9310.72.79.112/3010.72.79.113 – 10.72.79.11410.72.79.115
9410.72.79.116/3010.72.79.117 – 10.72.79.11810.72.79.119
9510.72.79.120/3010.72.79.121 – 10.72.79.12210.72.79.123
9610.72.79.124/3010.72.79.125 – 10.72.79.12610.72.79.127
9710.72.79.128/3010.72.79.129 – 10.72.79.13010.72.79.131
9810.72.79.132/3010.72.79.133 – 10.72.79.13410.72.79.135
9910.72.79.136/3010.72.79.137 – 10.72.79.13810.72.79.139
10010.72.79.140/3010.72.79.141 – 10.72.79.14210.72.79.143
10110.72.79.144/3010.72.79.145 – 10.72.79.14610.72.79.147
10210.72.79.148/3010.72.79.149 – 10.72.79.15010.72.79.151
10310.72.79.152/3010.72.79.153 – 10.72.79.15410.72.79.155
10410.72.79.156/3010.72.79.157 – 10.72.79.15810.72.79.159
10510.72.79.160/3010.72.79.161 – 10.72.79.16210.72.79.163
10610.72.79.164/3010.72.79.165 – 10.72.79.16610.72.79.167
10710.72.79.168/3010.72.79.169 – 10.72.79.17010.72.79.171
10810.72.79.172/3010.72.79.173 – 10.72.79.17410.72.79.175
10910.72.79.176/3010.72.79.177 – 10.72.79.17810.72.79.179
11010.72.79.180/3010.72.79.181 – 10.72.79.18210.72.79.183
11110.72.79.184/3010.72.79.185 – 10.72.79.18610.72.79.187
11210.72.79.188/3010.72.79.189 – 10.72.79.19010.72.79.191
11310.72.79.192/3010.72.79.193 – 10.72.79.19410.72.79.195
11410.72.79.196/3010.72.79.197 – 10.72.79.19810.72.79.199
11510.72.79.200/3010.72.79.201 – 10.72.79.20210.72.79.203
11610.72.79.204/3010.72.79.205 – 10.72.79.20610.72.79.207
11710.72.79.208/3010.72.79.209 – 10.72.79.21010.72.79.211
11810.72.79.212/3010.72.79.213 – 10.72.79.21410.72.79.215
11910.72.79.216/3010.72.79.217 – 10.72.79.21810.72.79.219
12010.72.79.220/3010.72.79.221 – 10.72.79.22210.72.79.223
12110.72.79.224/3010.72.79.225 – 10.72.79.22610.72.79.227
12210.72.79.228/3010.72.79.229 – 10.72.79.23010.72.79.231
12310.72.79.232/3010.72.79.233 – 10.72.79.23410.72.79.235
12410.72.79.236/3010.72.79.237 – 10.72.79.23810.72.79.239
12510.72.79.240/3010.72.79.241 – 10.72.79.24210.72.79.243
12610.72.79.244/3010.72.79.245 – 10.72.79.24610.72.79.247
12710.72.79.248/3010.72.79.249 – 10.72.79.25010.72.79.251
12810.72.79.252/3010.72.79.253 – 10.72.79.25410.72.79.255
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 →