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)10.78.40.0/23
network10.78.40.0/23
broadcast10.78.41.255
first host10.78.40.1
last host10.78.41.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.40.0/23
address00001010.01001110.00101000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.00101000.00000000
broadcast00001010.01001110.00101001.11111111
green = network part, grey = host part
hex0x0a4e2800
decimal172894208
reverse dns0.40.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:2800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.40.0/3010.78.40.1 – 10.78.40.210.78.40.3
210.78.40.4/3010.78.40.5 – 10.78.40.610.78.40.7
310.78.40.8/3010.78.40.9 – 10.78.40.1010.78.40.11
410.78.40.12/3010.78.40.13 – 10.78.40.1410.78.40.15
510.78.40.16/3010.78.40.17 – 10.78.40.1810.78.40.19
610.78.40.20/3010.78.40.21 – 10.78.40.2210.78.40.23
710.78.40.24/3010.78.40.25 – 10.78.40.2610.78.40.27
810.78.40.28/3010.78.40.29 – 10.78.40.3010.78.40.31
910.78.40.32/3010.78.40.33 – 10.78.40.3410.78.40.35
1010.78.40.36/3010.78.40.37 – 10.78.40.3810.78.40.39
1110.78.40.40/3010.78.40.41 – 10.78.40.4210.78.40.43
1210.78.40.44/3010.78.40.45 – 10.78.40.4610.78.40.47
1310.78.40.48/3010.78.40.49 – 10.78.40.5010.78.40.51
1410.78.40.52/3010.78.40.53 – 10.78.40.5410.78.40.55
1510.78.40.56/3010.78.40.57 – 10.78.40.5810.78.40.59
1610.78.40.60/3010.78.40.61 – 10.78.40.6210.78.40.63
1710.78.40.64/3010.78.40.65 – 10.78.40.6610.78.40.67
1810.78.40.68/3010.78.40.69 – 10.78.40.7010.78.40.71
1910.78.40.72/3010.78.40.73 – 10.78.40.7410.78.40.75
2010.78.40.76/3010.78.40.77 – 10.78.40.7810.78.40.79
2110.78.40.80/3010.78.40.81 – 10.78.40.8210.78.40.83
2210.78.40.84/3010.78.40.85 – 10.78.40.8610.78.40.87
2310.78.40.88/3010.78.40.89 – 10.78.40.9010.78.40.91
2410.78.40.92/3010.78.40.93 – 10.78.40.9410.78.40.95
2510.78.40.96/3010.78.40.97 – 10.78.40.9810.78.40.99
2610.78.40.100/3010.78.40.101 – 10.78.40.10210.78.40.103
2710.78.40.104/3010.78.40.105 – 10.78.40.10610.78.40.107
2810.78.40.108/3010.78.40.109 – 10.78.40.11010.78.40.111
2910.78.40.112/3010.78.40.113 – 10.78.40.11410.78.40.115
3010.78.40.116/3010.78.40.117 – 10.78.40.11810.78.40.119
3110.78.40.120/3010.78.40.121 – 10.78.40.12210.78.40.123
3210.78.40.124/3010.78.40.125 – 10.78.40.12610.78.40.127
3310.78.40.128/3010.78.40.129 – 10.78.40.13010.78.40.131
3410.78.40.132/3010.78.40.133 – 10.78.40.13410.78.40.135
3510.78.40.136/3010.78.40.137 – 10.78.40.13810.78.40.139
3610.78.40.140/3010.78.40.141 – 10.78.40.14210.78.40.143
3710.78.40.144/3010.78.40.145 – 10.78.40.14610.78.40.147
3810.78.40.148/3010.78.40.149 – 10.78.40.15010.78.40.151
3910.78.40.152/3010.78.40.153 – 10.78.40.15410.78.40.155
4010.78.40.156/3010.78.40.157 – 10.78.40.15810.78.40.159
4110.78.40.160/3010.78.40.161 – 10.78.40.16210.78.40.163
4210.78.40.164/3010.78.40.165 – 10.78.40.16610.78.40.167
4310.78.40.168/3010.78.40.169 – 10.78.40.17010.78.40.171
4410.78.40.172/3010.78.40.173 – 10.78.40.17410.78.40.175
4510.78.40.176/3010.78.40.177 – 10.78.40.17810.78.40.179
4610.78.40.180/3010.78.40.181 – 10.78.40.18210.78.40.183
4710.78.40.184/3010.78.40.185 – 10.78.40.18610.78.40.187
4810.78.40.188/3010.78.40.189 – 10.78.40.19010.78.40.191
4910.78.40.192/3010.78.40.193 – 10.78.40.19410.78.40.195
5010.78.40.196/3010.78.40.197 – 10.78.40.19810.78.40.199
5110.78.40.200/3010.78.40.201 – 10.78.40.20210.78.40.203
5210.78.40.204/3010.78.40.205 – 10.78.40.20610.78.40.207
5310.78.40.208/3010.78.40.209 – 10.78.40.21010.78.40.211
5410.78.40.212/3010.78.40.213 – 10.78.40.21410.78.40.215
5510.78.40.216/3010.78.40.217 – 10.78.40.21810.78.40.219
5610.78.40.220/3010.78.40.221 – 10.78.40.22210.78.40.223
5710.78.40.224/3010.78.40.225 – 10.78.40.22610.78.40.227
5810.78.40.228/3010.78.40.229 – 10.78.40.23010.78.40.231
5910.78.40.232/3010.78.40.233 – 10.78.40.23410.78.40.235
6010.78.40.236/3010.78.40.237 – 10.78.40.23810.78.40.239
6110.78.40.240/3010.78.40.241 – 10.78.40.24210.78.40.243
6210.78.40.244/3010.78.40.245 – 10.78.40.24610.78.40.247
6310.78.40.248/3010.78.40.249 – 10.78.40.25010.78.40.251
6410.78.40.252/3010.78.40.253 – 10.78.40.25410.78.40.255
6510.78.41.0/3010.78.41.1 – 10.78.41.210.78.41.3
6610.78.41.4/3010.78.41.5 – 10.78.41.610.78.41.7
6710.78.41.8/3010.78.41.9 – 10.78.41.1010.78.41.11
6810.78.41.12/3010.78.41.13 – 10.78.41.1410.78.41.15
6910.78.41.16/3010.78.41.17 – 10.78.41.1810.78.41.19
7010.78.41.20/3010.78.41.21 – 10.78.41.2210.78.41.23
7110.78.41.24/3010.78.41.25 – 10.78.41.2610.78.41.27
7210.78.41.28/3010.78.41.29 – 10.78.41.3010.78.41.31
7310.78.41.32/3010.78.41.33 – 10.78.41.3410.78.41.35
7410.78.41.36/3010.78.41.37 – 10.78.41.3810.78.41.39
7510.78.41.40/3010.78.41.41 – 10.78.41.4210.78.41.43
7610.78.41.44/3010.78.41.45 – 10.78.41.4610.78.41.47
7710.78.41.48/3010.78.41.49 – 10.78.41.5010.78.41.51
7810.78.41.52/3010.78.41.53 – 10.78.41.5410.78.41.55
7910.78.41.56/3010.78.41.57 – 10.78.41.5810.78.41.59
8010.78.41.60/3010.78.41.61 – 10.78.41.6210.78.41.63
8110.78.41.64/3010.78.41.65 – 10.78.41.6610.78.41.67
8210.78.41.68/3010.78.41.69 – 10.78.41.7010.78.41.71
8310.78.41.72/3010.78.41.73 – 10.78.41.7410.78.41.75
8410.78.41.76/3010.78.41.77 – 10.78.41.7810.78.41.79
8510.78.41.80/3010.78.41.81 – 10.78.41.8210.78.41.83
8610.78.41.84/3010.78.41.85 – 10.78.41.8610.78.41.87
8710.78.41.88/3010.78.41.89 – 10.78.41.9010.78.41.91
8810.78.41.92/3010.78.41.93 – 10.78.41.9410.78.41.95
8910.78.41.96/3010.78.41.97 – 10.78.41.9810.78.41.99
9010.78.41.100/3010.78.41.101 – 10.78.41.10210.78.41.103
9110.78.41.104/3010.78.41.105 – 10.78.41.10610.78.41.107
9210.78.41.108/3010.78.41.109 – 10.78.41.11010.78.41.111
9310.78.41.112/3010.78.41.113 – 10.78.41.11410.78.41.115
9410.78.41.116/3010.78.41.117 – 10.78.41.11810.78.41.119
9510.78.41.120/3010.78.41.121 – 10.78.41.12210.78.41.123
9610.78.41.124/3010.78.41.125 – 10.78.41.12610.78.41.127
9710.78.41.128/3010.78.41.129 – 10.78.41.13010.78.41.131
9810.78.41.132/3010.78.41.133 – 10.78.41.13410.78.41.135
9910.78.41.136/3010.78.41.137 – 10.78.41.13810.78.41.139
10010.78.41.140/3010.78.41.141 – 10.78.41.14210.78.41.143
10110.78.41.144/3010.78.41.145 – 10.78.41.14610.78.41.147
10210.78.41.148/3010.78.41.149 – 10.78.41.15010.78.41.151
10310.78.41.152/3010.78.41.153 – 10.78.41.15410.78.41.155
10410.78.41.156/3010.78.41.157 – 10.78.41.15810.78.41.159
10510.78.41.160/3010.78.41.161 – 10.78.41.16210.78.41.163
10610.78.41.164/3010.78.41.165 – 10.78.41.16610.78.41.167
10710.78.41.168/3010.78.41.169 – 10.78.41.17010.78.41.171
10810.78.41.172/3010.78.41.173 – 10.78.41.17410.78.41.175
10910.78.41.176/3010.78.41.177 – 10.78.41.17810.78.41.179
11010.78.41.180/3010.78.41.181 – 10.78.41.18210.78.41.183
11110.78.41.184/3010.78.41.185 – 10.78.41.18610.78.41.187
11210.78.41.188/3010.78.41.189 – 10.78.41.19010.78.41.191
11310.78.41.192/3010.78.41.193 – 10.78.41.19410.78.41.195
11410.78.41.196/3010.78.41.197 – 10.78.41.19810.78.41.199
11510.78.41.200/3010.78.41.201 – 10.78.41.20210.78.41.203
11610.78.41.204/3010.78.41.205 – 10.78.41.20610.78.41.207
11710.78.41.208/3010.78.41.209 – 10.78.41.21010.78.41.211
11810.78.41.212/3010.78.41.213 – 10.78.41.21410.78.41.215
11910.78.41.216/3010.78.41.217 – 10.78.41.21810.78.41.219
12010.78.41.220/3010.78.41.221 – 10.78.41.22210.78.41.223
12110.78.41.224/3010.78.41.225 – 10.78.41.22610.78.41.227
12210.78.41.228/3010.78.41.229 – 10.78.41.23010.78.41.231
12310.78.41.232/3010.78.41.233 – 10.78.41.23410.78.41.235
12410.78.41.236/3010.78.41.237 – 10.78.41.23810.78.41.239
12510.78.41.240/3010.78.41.241 – 10.78.41.24210.78.41.243
12610.78.41.244/3010.78.41.245 – 10.78.41.24610.78.41.247
12710.78.41.248/3010.78.41.249 – 10.78.41.25010.78.41.251
12810.78.41.252/3010.78.41.253 – 10.78.41.25410.78.41.255
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 →