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)10.78.28.0/23
network10.78.28.0/23
broadcast10.78.29.255
first host10.78.28.1
last host10.78.29.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.28.0/23
address00001010.01001110.00011100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.00011100.00000000
broadcast00001010.01001110.00011101.11111111
green = network part, grey = host part
hex0x0a4e1c00
decimal172891136
reverse dns0.28.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:1c00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.28.0/3010.78.28.1 – 10.78.28.210.78.28.3
210.78.28.4/3010.78.28.5 – 10.78.28.610.78.28.7
310.78.28.8/3010.78.28.9 – 10.78.28.1010.78.28.11
410.78.28.12/3010.78.28.13 – 10.78.28.1410.78.28.15
510.78.28.16/3010.78.28.17 – 10.78.28.1810.78.28.19
610.78.28.20/3010.78.28.21 – 10.78.28.2210.78.28.23
710.78.28.24/3010.78.28.25 – 10.78.28.2610.78.28.27
810.78.28.28/3010.78.28.29 – 10.78.28.3010.78.28.31
910.78.28.32/3010.78.28.33 – 10.78.28.3410.78.28.35
1010.78.28.36/3010.78.28.37 – 10.78.28.3810.78.28.39
1110.78.28.40/3010.78.28.41 – 10.78.28.4210.78.28.43
1210.78.28.44/3010.78.28.45 – 10.78.28.4610.78.28.47
1310.78.28.48/3010.78.28.49 – 10.78.28.5010.78.28.51
1410.78.28.52/3010.78.28.53 – 10.78.28.5410.78.28.55
1510.78.28.56/3010.78.28.57 – 10.78.28.5810.78.28.59
1610.78.28.60/3010.78.28.61 – 10.78.28.6210.78.28.63
1710.78.28.64/3010.78.28.65 – 10.78.28.6610.78.28.67
1810.78.28.68/3010.78.28.69 – 10.78.28.7010.78.28.71
1910.78.28.72/3010.78.28.73 – 10.78.28.7410.78.28.75
2010.78.28.76/3010.78.28.77 – 10.78.28.7810.78.28.79
2110.78.28.80/3010.78.28.81 – 10.78.28.8210.78.28.83
2210.78.28.84/3010.78.28.85 – 10.78.28.8610.78.28.87
2310.78.28.88/3010.78.28.89 – 10.78.28.9010.78.28.91
2410.78.28.92/3010.78.28.93 – 10.78.28.9410.78.28.95
2510.78.28.96/3010.78.28.97 – 10.78.28.9810.78.28.99
2610.78.28.100/3010.78.28.101 – 10.78.28.10210.78.28.103
2710.78.28.104/3010.78.28.105 – 10.78.28.10610.78.28.107
2810.78.28.108/3010.78.28.109 – 10.78.28.11010.78.28.111
2910.78.28.112/3010.78.28.113 – 10.78.28.11410.78.28.115
3010.78.28.116/3010.78.28.117 – 10.78.28.11810.78.28.119
3110.78.28.120/3010.78.28.121 – 10.78.28.12210.78.28.123
3210.78.28.124/3010.78.28.125 – 10.78.28.12610.78.28.127
3310.78.28.128/3010.78.28.129 – 10.78.28.13010.78.28.131
3410.78.28.132/3010.78.28.133 – 10.78.28.13410.78.28.135
3510.78.28.136/3010.78.28.137 – 10.78.28.13810.78.28.139
3610.78.28.140/3010.78.28.141 – 10.78.28.14210.78.28.143
3710.78.28.144/3010.78.28.145 – 10.78.28.14610.78.28.147
3810.78.28.148/3010.78.28.149 – 10.78.28.15010.78.28.151
3910.78.28.152/3010.78.28.153 – 10.78.28.15410.78.28.155
4010.78.28.156/3010.78.28.157 – 10.78.28.15810.78.28.159
4110.78.28.160/3010.78.28.161 – 10.78.28.16210.78.28.163
4210.78.28.164/3010.78.28.165 – 10.78.28.16610.78.28.167
4310.78.28.168/3010.78.28.169 – 10.78.28.17010.78.28.171
4410.78.28.172/3010.78.28.173 – 10.78.28.17410.78.28.175
4510.78.28.176/3010.78.28.177 – 10.78.28.17810.78.28.179
4610.78.28.180/3010.78.28.181 – 10.78.28.18210.78.28.183
4710.78.28.184/3010.78.28.185 – 10.78.28.18610.78.28.187
4810.78.28.188/3010.78.28.189 – 10.78.28.19010.78.28.191
4910.78.28.192/3010.78.28.193 – 10.78.28.19410.78.28.195
5010.78.28.196/3010.78.28.197 – 10.78.28.19810.78.28.199
5110.78.28.200/3010.78.28.201 – 10.78.28.20210.78.28.203
5210.78.28.204/3010.78.28.205 – 10.78.28.20610.78.28.207
5310.78.28.208/3010.78.28.209 – 10.78.28.21010.78.28.211
5410.78.28.212/3010.78.28.213 – 10.78.28.21410.78.28.215
5510.78.28.216/3010.78.28.217 – 10.78.28.21810.78.28.219
5610.78.28.220/3010.78.28.221 – 10.78.28.22210.78.28.223
5710.78.28.224/3010.78.28.225 – 10.78.28.22610.78.28.227
5810.78.28.228/3010.78.28.229 – 10.78.28.23010.78.28.231
5910.78.28.232/3010.78.28.233 – 10.78.28.23410.78.28.235
6010.78.28.236/3010.78.28.237 – 10.78.28.23810.78.28.239
6110.78.28.240/3010.78.28.241 – 10.78.28.24210.78.28.243
6210.78.28.244/3010.78.28.245 – 10.78.28.24610.78.28.247
6310.78.28.248/3010.78.28.249 – 10.78.28.25010.78.28.251
6410.78.28.252/3010.78.28.253 – 10.78.28.25410.78.28.255
6510.78.29.0/3010.78.29.1 – 10.78.29.210.78.29.3
6610.78.29.4/3010.78.29.5 – 10.78.29.610.78.29.7
6710.78.29.8/3010.78.29.9 – 10.78.29.1010.78.29.11
6810.78.29.12/3010.78.29.13 – 10.78.29.1410.78.29.15
6910.78.29.16/3010.78.29.17 – 10.78.29.1810.78.29.19
7010.78.29.20/3010.78.29.21 – 10.78.29.2210.78.29.23
7110.78.29.24/3010.78.29.25 – 10.78.29.2610.78.29.27
7210.78.29.28/3010.78.29.29 – 10.78.29.3010.78.29.31
7310.78.29.32/3010.78.29.33 – 10.78.29.3410.78.29.35
7410.78.29.36/3010.78.29.37 – 10.78.29.3810.78.29.39
7510.78.29.40/3010.78.29.41 – 10.78.29.4210.78.29.43
7610.78.29.44/3010.78.29.45 – 10.78.29.4610.78.29.47
7710.78.29.48/3010.78.29.49 – 10.78.29.5010.78.29.51
7810.78.29.52/3010.78.29.53 – 10.78.29.5410.78.29.55
7910.78.29.56/3010.78.29.57 – 10.78.29.5810.78.29.59
8010.78.29.60/3010.78.29.61 – 10.78.29.6210.78.29.63
8110.78.29.64/3010.78.29.65 – 10.78.29.6610.78.29.67
8210.78.29.68/3010.78.29.69 – 10.78.29.7010.78.29.71
8310.78.29.72/3010.78.29.73 – 10.78.29.7410.78.29.75
8410.78.29.76/3010.78.29.77 – 10.78.29.7810.78.29.79
8510.78.29.80/3010.78.29.81 – 10.78.29.8210.78.29.83
8610.78.29.84/3010.78.29.85 – 10.78.29.8610.78.29.87
8710.78.29.88/3010.78.29.89 – 10.78.29.9010.78.29.91
8810.78.29.92/3010.78.29.93 – 10.78.29.9410.78.29.95
8910.78.29.96/3010.78.29.97 – 10.78.29.9810.78.29.99
9010.78.29.100/3010.78.29.101 – 10.78.29.10210.78.29.103
9110.78.29.104/3010.78.29.105 – 10.78.29.10610.78.29.107
9210.78.29.108/3010.78.29.109 – 10.78.29.11010.78.29.111
9310.78.29.112/3010.78.29.113 – 10.78.29.11410.78.29.115
9410.78.29.116/3010.78.29.117 – 10.78.29.11810.78.29.119
9510.78.29.120/3010.78.29.121 – 10.78.29.12210.78.29.123
9610.78.29.124/3010.78.29.125 – 10.78.29.12610.78.29.127
9710.78.29.128/3010.78.29.129 – 10.78.29.13010.78.29.131
9810.78.29.132/3010.78.29.133 – 10.78.29.13410.78.29.135
9910.78.29.136/3010.78.29.137 – 10.78.29.13810.78.29.139
10010.78.29.140/3010.78.29.141 – 10.78.29.14210.78.29.143
10110.78.29.144/3010.78.29.145 – 10.78.29.14610.78.29.147
10210.78.29.148/3010.78.29.149 – 10.78.29.15010.78.29.151
10310.78.29.152/3010.78.29.153 – 10.78.29.15410.78.29.155
10410.78.29.156/3010.78.29.157 – 10.78.29.15810.78.29.159
10510.78.29.160/3010.78.29.161 – 10.78.29.16210.78.29.163
10610.78.29.164/3010.78.29.165 – 10.78.29.16610.78.29.167
10710.78.29.168/3010.78.29.169 – 10.78.29.17010.78.29.171
10810.78.29.172/3010.78.29.173 – 10.78.29.17410.78.29.175
10910.78.29.176/3010.78.29.177 – 10.78.29.17810.78.29.179
11010.78.29.180/3010.78.29.181 – 10.78.29.18210.78.29.183
11110.78.29.184/3010.78.29.185 – 10.78.29.18610.78.29.187
11210.78.29.188/3010.78.29.189 – 10.78.29.19010.78.29.191
11310.78.29.192/3010.78.29.193 – 10.78.29.19410.78.29.195
11410.78.29.196/3010.78.29.197 – 10.78.29.19810.78.29.199
11510.78.29.200/3010.78.29.201 – 10.78.29.20210.78.29.203
11610.78.29.204/3010.78.29.205 – 10.78.29.20610.78.29.207
11710.78.29.208/3010.78.29.209 – 10.78.29.21010.78.29.211
11810.78.29.212/3010.78.29.213 – 10.78.29.21410.78.29.215
11910.78.29.216/3010.78.29.217 – 10.78.29.21810.78.29.219
12010.78.29.220/3010.78.29.221 – 10.78.29.22210.78.29.223
12110.78.29.224/3010.78.29.225 – 10.78.29.22610.78.29.227
12210.78.29.228/3010.78.29.229 – 10.78.29.23010.78.29.231
12310.78.29.232/3010.78.29.233 – 10.78.29.23410.78.29.235
12410.78.29.236/3010.78.29.237 – 10.78.29.23810.78.29.239
12510.78.29.240/3010.78.29.241 – 10.78.29.24210.78.29.243
12610.78.29.244/3010.78.29.245 – 10.78.29.24610.78.29.247
12710.78.29.248/3010.78.29.249 – 10.78.29.25010.78.29.251
12810.78.29.252/3010.78.29.253 – 10.78.29.25410.78.29.255
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 →