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)10.78.70.0/23
network10.78.70.0/23
broadcast10.78.71.255
first host10.78.70.1
last host10.78.71.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.70.0/23
address00001010.01001110.01000110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.01000110.00000000
broadcast00001010.01001110.01000111.11111111
green = network part, grey = host part
hex0x0a4e4600
decimal172901888
reverse dns0.70.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:4600

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.70.0/3010.78.70.1 – 10.78.70.210.78.70.3
210.78.70.4/3010.78.70.5 – 10.78.70.610.78.70.7
310.78.70.8/3010.78.70.9 – 10.78.70.1010.78.70.11
410.78.70.12/3010.78.70.13 – 10.78.70.1410.78.70.15
510.78.70.16/3010.78.70.17 – 10.78.70.1810.78.70.19
610.78.70.20/3010.78.70.21 – 10.78.70.2210.78.70.23
710.78.70.24/3010.78.70.25 – 10.78.70.2610.78.70.27
810.78.70.28/3010.78.70.29 – 10.78.70.3010.78.70.31
910.78.70.32/3010.78.70.33 – 10.78.70.3410.78.70.35
1010.78.70.36/3010.78.70.37 – 10.78.70.3810.78.70.39
1110.78.70.40/3010.78.70.41 – 10.78.70.4210.78.70.43
1210.78.70.44/3010.78.70.45 – 10.78.70.4610.78.70.47
1310.78.70.48/3010.78.70.49 – 10.78.70.5010.78.70.51
1410.78.70.52/3010.78.70.53 – 10.78.70.5410.78.70.55
1510.78.70.56/3010.78.70.57 – 10.78.70.5810.78.70.59
1610.78.70.60/3010.78.70.61 – 10.78.70.6210.78.70.63
1710.78.70.64/3010.78.70.65 – 10.78.70.6610.78.70.67
1810.78.70.68/3010.78.70.69 – 10.78.70.7010.78.70.71
1910.78.70.72/3010.78.70.73 – 10.78.70.7410.78.70.75
2010.78.70.76/3010.78.70.77 – 10.78.70.7810.78.70.79
2110.78.70.80/3010.78.70.81 – 10.78.70.8210.78.70.83
2210.78.70.84/3010.78.70.85 – 10.78.70.8610.78.70.87
2310.78.70.88/3010.78.70.89 – 10.78.70.9010.78.70.91
2410.78.70.92/3010.78.70.93 – 10.78.70.9410.78.70.95
2510.78.70.96/3010.78.70.97 – 10.78.70.9810.78.70.99
2610.78.70.100/3010.78.70.101 – 10.78.70.10210.78.70.103
2710.78.70.104/3010.78.70.105 – 10.78.70.10610.78.70.107
2810.78.70.108/3010.78.70.109 – 10.78.70.11010.78.70.111
2910.78.70.112/3010.78.70.113 – 10.78.70.11410.78.70.115
3010.78.70.116/3010.78.70.117 – 10.78.70.11810.78.70.119
3110.78.70.120/3010.78.70.121 – 10.78.70.12210.78.70.123
3210.78.70.124/3010.78.70.125 – 10.78.70.12610.78.70.127
3310.78.70.128/3010.78.70.129 – 10.78.70.13010.78.70.131
3410.78.70.132/3010.78.70.133 – 10.78.70.13410.78.70.135
3510.78.70.136/3010.78.70.137 – 10.78.70.13810.78.70.139
3610.78.70.140/3010.78.70.141 – 10.78.70.14210.78.70.143
3710.78.70.144/3010.78.70.145 – 10.78.70.14610.78.70.147
3810.78.70.148/3010.78.70.149 – 10.78.70.15010.78.70.151
3910.78.70.152/3010.78.70.153 – 10.78.70.15410.78.70.155
4010.78.70.156/3010.78.70.157 – 10.78.70.15810.78.70.159
4110.78.70.160/3010.78.70.161 – 10.78.70.16210.78.70.163
4210.78.70.164/3010.78.70.165 – 10.78.70.16610.78.70.167
4310.78.70.168/3010.78.70.169 – 10.78.70.17010.78.70.171
4410.78.70.172/3010.78.70.173 – 10.78.70.17410.78.70.175
4510.78.70.176/3010.78.70.177 – 10.78.70.17810.78.70.179
4610.78.70.180/3010.78.70.181 – 10.78.70.18210.78.70.183
4710.78.70.184/3010.78.70.185 – 10.78.70.18610.78.70.187
4810.78.70.188/3010.78.70.189 – 10.78.70.19010.78.70.191
4910.78.70.192/3010.78.70.193 – 10.78.70.19410.78.70.195
5010.78.70.196/3010.78.70.197 – 10.78.70.19810.78.70.199
5110.78.70.200/3010.78.70.201 – 10.78.70.20210.78.70.203
5210.78.70.204/3010.78.70.205 – 10.78.70.20610.78.70.207
5310.78.70.208/3010.78.70.209 – 10.78.70.21010.78.70.211
5410.78.70.212/3010.78.70.213 – 10.78.70.21410.78.70.215
5510.78.70.216/3010.78.70.217 – 10.78.70.21810.78.70.219
5610.78.70.220/3010.78.70.221 – 10.78.70.22210.78.70.223
5710.78.70.224/3010.78.70.225 – 10.78.70.22610.78.70.227
5810.78.70.228/3010.78.70.229 – 10.78.70.23010.78.70.231
5910.78.70.232/3010.78.70.233 – 10.78.70.23410.78.70.235
6010.78.70.236/3010.78.70.237 – 10.78.70.23810.78.70.239
6110.78.70.240/3010.78.70.241 – 10.78.70.24210.78.70.243
6210.78.70.244/3010.78.70.245 – 10.78.70.24610.78.70.247
6310.78.70.248/3010.78.70.249 – 10.78.70.25010.78.70.251
6410.78.70.252/3010.78.70.253 – 10.78.70.25410.78.70.255
6510.78.71.0/3010.78.71.1 – 10.78.71.210.78.71.3
6610.78.71.4/3010.78.71.5 – 10.78.71.610.78.71.7
6710.78.71.8/3010.78.71.9 – 10.78.71.1010.78.71.11
6810.78.71.12/3010.78.71.13 – 10.78.71.1410.78.71.15
6910.78.71.16/3010.78.71.17 – 10.78.71.1810.78.71.19
7010.78.71.20/3010.78.71.21 – 10.78.71.2210.78.71.23
7110.78.71.24/3010.78.71.25 – 10.78.71.2610.78.71.27
7210.78.71.28/3010.78.71.29 – 10.78.71.3010.78.71.31
7310.78.71.32/3010.78.71.33 – 10.78.71.3410.78.71.35
7410.78.71.36/3010.78.71.37 – 10.78.71.3810.78.71.39
7510.78.71.40/3010.78.71.41 – 10.78.71.4210.78.71.43
7610.78.71.44/3010.78.71.45 – 10.78.71.4610.78.71.47
7710.78.71.48/3010.78.71.49 – 10.78.71.5010.78.71.51
7810.78.71.52/3010.78.71.53 – 10.78.71.5410.78.71.55
7910.78.71.56/3010.78.71.57 – 10.78.71.5810.78.71.59
8010.78.71.60/3010.78.71.61 – 10.78.71.6210.78.71.63
8110.78.71.64/3010.78.71.65 – 10.78.71.6610.78.71.67
8210.78.71.68/3010.78.71.69 – 10.78.71.7010.78.71.71
8310.78.71.72/3010.78.71.73 – 10.78.71.7410.78.71.75
8410.78.71.76/3010.78.71.77 – 10.78.71.7810.78.71.79
8510.78.71.80/3010.78.71.81 – 10.78.71.8210.78.71.83
8610.78.71.84/3010.78.71.85 – 10.78.71.8610.78.71.87
8710.78.71.88/3010.78.71.89 – 10.78.71.9010.78.71.91
8810.78.71.92/3010.78.71.93 – 10.78.71.9410.78.71.95
8910.78.71.96/3010.78.71.97 – 10.78.71.9810.78.71.99
9010.78.71.100/3010.78.71.101 – 10.78.71.10210.78.71.103
9110.78.71.104/3010.78.71.105 – 10.78.71.10610.78.71.107
9210.78.71.108/3010.78.71.109 – 10.78.71.11010.78.71.111
9310.78.71.112/3010.78.71.113 – 10.78.71.11410.78.71.115
9410.78.71.116/3010.78.71.117 – 10.78.71.11810.78.71.119
9510.78.71.120/3010.78.71.121 – 10.78.71.12210.78.71.123
9610.78.71.124/3010.78.71.125 – 10.78.71.12610.78.71.127
9710.78.71.128/3010.78.71.129 – 10.78.71.13010.78.71.131
9810.78.71.132/3010.78.71.133 – 10.78.71.13410.78.71.135
9910.78.71.136/3010.78.71.137 – 10.78.71.13810.78.71.139
10010.78.71.140/3010.78.71.141 – 10.78.71.14210.78.71.143
10110.78.71.144/3010.78.71.145 – 10.78.71.14610.78.71.147
10210.78.71.148/3010.78.71.149 – 10.78.71.15010.78.71.151
10310.78.71.152/3010.78.71.153 – 10.78.71.15410.78.71.155
10410.78.71.156/3010.78.71.157 – 10.78.71.15810.78.71.159
10510.78.71.160/3010.78.71.161 – 10.78.71.16210.78.71.163
10610.78.71.164/3010.78.71.165 – 10.78.71.16610.78.71.167
10710.78.71.168/3010.78.71.169 – 10.78.71.17010.78.71.171
10810.78.71.172/3010.78.71.173 – 10.78.71.17410.78.71.175
10910.78.71.176/3010.78.71.177 – 10.78.71.17810.78.71.179
11010.78.71.180/3010.78.71.181 – 10.78.71.18210.78.71.183
11110.78.71.184/3010.78.71.185 – 10.78.71.18610.78.71.187
11210.78.71.188/3010.78.71.189 – 10.78.71.19010.78.71.191
11310.78.71.192/3010.78.71.193 – 10.78.71.19410.78.71.195
11410.78.71.196/3010.78.71.197 – 10.78.71.19810.78.71.199
11510.78.71.200/3010.78.71.201 – 10.78.71.20210.78.71.203
11610.78.71.204/3010.78.71.205 – 10.78.71.20610.78.71.207
11710.78.71.208/3010.78.71.209 – 10.78.71.21010.78.71.211
11810.78.71.212/3010.78.71.213 – 10.78.71.21410.78.71.215
11910.78.71.216/3010.78.71.217 – 10.78.71.21810.78.71.219
12010.78.71.220/3010.78.71.221 – 10.78.71.22210.78.71.223
12110.78.71.224/3010.78.71.225 – 10.78.71.22610.78.71.227
12210.78.71.228/3010.78.71.229 – 10.78.71.23010.78.71.231
12310.78.71.232/3010.78.71.233 – 10.78.71.23410.78.71.235
12410.78.71.236/3010.78.71.237 – 10.78.71.23810.78.71.239
12510.78.71.240/3010.78.71.241 – 10.78.71.24210.78.71.243
12610.78.71.244/3010.78.71.245 – 10.78.71.24610.78.71.247
12710.78.71.248/3010.78.71.249 – 10.78.71.25010.78.71.251
12810.78.71.252/3010.78.71.253 – 10.78.71.25410.78.71.255
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 →