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)10.78.154.0/23
network10.78.154.0/23
broadcast10.78.155.255
first host10.78.154.1
last host10.78.155.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.154.0/23
address00001010.01001110.10011010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.10011010.00000000
broadcast00001010.01001110.10011011.11111111
green = network part, grey = host part
hex0x0a4e9a00
decimal172923392
reverse dns0.154.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:9a00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.154.0/3010.78.154.1 – 10.78.154.210.78.154.3
210.78.154.4/3010.78.154.5 – 10.78.154.610.78.154.7
310.78.154.8/3010.78.154.9 – 10.78.154.1010.78.154.11
410.78.154.12/3010.78.154.13 – 10.78.154.1410.78.154.15
510.78.154.16/3010.78.154.17 – 10.78.154.1810.78.154.19
610.78.154.20/3010.78.154.21 – 10.78.154.2210.78.154.23
710.78.154.24/3010.78.154.25 – 10.78.154.2610.78.154.27
810.78.154.28/3010.78.154.29 – 10.78.154.3010.78.154.31
910.78.154.32/3010.78.154.33 – 10.78.154.3410.78.154.35
1010.78.154.36/3010.78.154.37 – 10.78.154.3810.78.154.39
1110.78.154.40/3010.78.154.41 – 10.78.154.4210.78.154.43
1210.78.154.44/3010.78.154.45 – 10.78.154.4610.78.154.47
1310.78.154.48/3010.78.154.49 – 10.78.154.5010.78.154.51
1410.78.154.52/3010.78.154.53 – 10.78.154.5410.78.154.55
1510.78.154.56/3010.78.154.57 – 10.78.154.5810.78.154.59
1610.78.154.60/3010.78.154.61 – 10.78.154.6210.78.154.63
1710.78.154.64/3010.78.154.65 – 10.78.154.6610.78.154.67
1810.78.154.68/3010.78.154.69 – 10.78.154.7010.78.154.71
1910.78.154.72/3010.78.154.73 – 10.78.154.7410.78.154.75
2010.78.154.76/3010.78.154.77 – 10.78.154.7810.78.154.79
2110.78.154.80/3010.78.154.81 – 10.78.154.8210.78.154.83
2210.78.154.84/3010.78.154.85 – 10.78.154.8610.78.154.87
2310.78.154.88/3010.78.154.89 – 10.78.154.9010.78.154.91
2410.78.154.92/3010.78.154.93 – 10.78.154.9410.78.154.95
2510.78.154.96/3010.78.154.97 – 10.78.154.9810.78.154.99
2610.78.154.100/3010.78.154.101 – 10.78.154.10210.78.154.103
2710.78.154.104/3010.78.154.105 – 10.78.154.10610.78.154.107
2810.78.154.108/3010.78.154.109 – 10.78.154.11010.78.154.111
2910.78.154.112/3010.78.154.113 – 10.78.154.11410.78.154.115
3010.78.154.116/3010.78.154.117 – 10.78.154.11810.78.154.119
3110.78.154.120/3010.78.154.121 – 10.78.154.12210.78.154.123
3210.78.154.124/3010.78.154.125 – 10.78.154.12610.78.154.127
3310.78.154.128/3010.78.154.129 – 10.78.154.13010.78.154.131
3410.78.154.132/3010.78.154.133 – 10.78.154.13410.78.154.135
3510.78.154.136/3010.78.154.137 – 10.78.154.13810.78.154.139
3610.78.154.140/3010.78.154.141 – 10.78.154.14210.78.154.143
3710.78.154.144/3010.78.154.145 – 10.78.154.14610.78.154.147
3810.78.154.148/3010.78.154.149 – 10.78.154.15010.78.154.151
3910.78.154.152/3010.78.154.153 – 10.78.154.15410.78.154.155
4010.78.154.156/3010.78.154.157 – 10.78.154.15810.78.154.159
4110.78.154.160/3010.78.154.161 – 10.78.154.16210.78.154.163
4210.78.154.164/3010.78.154.165 – 10.78.154.16610.78.154.167
4310.78.154.168/3010.78.154.169 – 10.78.154.17010.78.154.171
4410.78.154.172/3010.78.154.173 – 10.78.154.17410.78.154.175
4510.78.154.176/3010.78.154.177 – 10.78.154.17810.78.154.179
4610.78.154.180/3010.78.154.181 – 10.78.154.18210.78.154.183
4710.78.154.184/3010.78.154.185 – 10.78.154.18610.78.154.187
4810.78.154.188/3010.78.154.189 – 10.78.154.19010.78.154.191
4910.78.154.192/3010.78.154.193 – 10.78.154.19410.78.154.195
5010.78.154.196/3010.78.154.197 – 10.78.154.19810.78.154.199
5110.78.154.200/3010.78.154.201 – 10.78.154.20210.78.154.203
5210.78.154.204/3010.78.154.205 – 10.78.154.20610.78.154.207
5310.78.154.208/3010.78.154.209 – 10.78.154.21010.78.154.211
5410.78.154.212/3010.78.154.213 – 10.78.154.21410.78.154.215
5510.78.154.216/3010.78.154.217 – 10.78.154.21810.78.154.219
5610.78.154.220/3010.78.154.221 – 10.78.154.22210.78.154.223
5710.78.154.224/3010.78.154.225 – 10.78.154.22610.78.154.227
5810.78.154.228/3010.78.154.229 – 10.78.154.23010.78.154.231
5910.78.154.232/3010.78.154.233 – 10.78.154.23410.78.154.235
6010.78.154.236/3010.78.154.237 – 10.78.154.23810.78.154.239
6110.78.154.240/3010.78.154.241 – 10.78.154.24210.78.154.243
6210.78.154.244/3010.78.154.245 – 10.78.154.24610.78.154.247
6310.78.154.248/3010.78.154.249 – 10.78.154.25010.78.154.251
6410.78.154.252/3010.78.154.253 – 10.78.154.25410.78.154.255
6510.78.155.0/3010.78.155.1 – 10.78.155.210.78.155.3
6610.78.155.4/3010.78.155.5 – 10.78.155.610.78.155.7
6710.78.155.8/3010.78.155.9 – 10.78.155.1010.78.155.11
6810.78.155.12/3010.78.155.13 – 10.78.155.1410.78.155.15
6910.78.155.16/3010.78.155.17 – 10.78.155.1810.78.155.19
7010.78.155.20/3010.78.155.21 – 10.78.155.2210.78.155.23
7110.78.155.24/3010.78.155.25 – 10.78.155.2610.78.155.27
7210.78.155.28/3010.78.155.29 – 10.78.155.3010.78.155.31
7310.78.155.32/3010.78.155.33 – 10.78.155.3410.78.155.35
7410.78.155.36/3010.78.155.37 – 10.78.155.3810.78.155.39
7510.78.155.40/3010.78.155.41 – 10.78.155.4210.78.155.43
7610.78.155.44/3010.78.155.45 – 10.78.155.4610.78.155.47
7710.78.155.48/3010.78.155.49 – 10.78.155.5010.78.155.51
7810.78.155.52/3010.78.155.53 – 10.78.155.5410.78.155.55
7910.78.155.56/3010.78.155.57 – 10.78.155.5810.78.155.59
8010.78.155.60/3010.78.155.61 – 10.78.155.6210.78.155.63
8110.78.155.64/3010.78.155.65 – 10.78.155.6610.78.155.67
8210.78.155.68/3010.78.155.69 – 10.78.155.7010.78.155.71
8310.78.155.72/3010.78.155.73 – 10.78.155.7410.78.155.75
8410.78.155.76/3010.78.155.77 – 10.78.155.7810.78.155.79
8510.78.155.80/3010.78.155.81 – 10.78.155.8210.78.155.83
8610.78.155.84/3010.78.155.85 – 10.78.155.8610.78.155.87
8710.78.155.88/3010.78.155.89 – 10.78.155.9010.78.155.91
8810.78.155.92/3010.78.155.93 – 10.78.155.9410.78.155.95
8910.78.155.96/3010.78.155.97 – 10.78.155.9810.78.155.99
9010.78.155.100/3010.78.155.101 – 10.78.155.10210.78.155.103
9110.78.155.104/3010.78.155.105 – 10.78.155.10610.78.155.107
9210.78.155.108/3010.78.155.109 – 10.78.155.11010.78.155.111
9310.78.155.112/3010.78.155.113 – 10.78.155.11410.78.155.115
9410.78.155.116/3010.78.155.117 – 10.78.155.11810.78.155.119
9510.78.155.120/3010.78.155.121 – 10.78.155.12210.78.155.123
9610.78.155.124/3010.78.155.125 – 10.78.155.12610.78.155.127
9710.78.155.128/3010.78.155.129 – 10.78.155.13010.78.155.131
9810.78.155.132/3010.78.155.133 – 10.78.155.13410.78.155.135
9910.78.155.136/3010.78.155.137 – 10.78.155.13810.78.155.139
10010.78.155.140/3010.78.155.141 – 10.78.155.14210.78.155.143
10110.78.155.144/3010.78.155.145 – 10.78.155.14610.78.155.147
10210.78.155.148/3010.78.155.149 – 10.78.155.15010.78.155.151
10310.78.155.152/3010.78.155.153 – 10.78.155.15410.78.155.155
10410.78.155.156/3010.78.155.157 – 10.78.155.15810.78.155.159
10510.78.155.160/3010.78.155.161 – 10.78.155.16210.78.155.163
10610.78.155.164/3010.78.155.165 – 10.78.155.16610.78.155.167
10710.78.155.168/3010.78.155.169 – 10.78.155.17010.78.155.171
10810.78.155.172/3010.78.155.173 – 10.78.155.17410.78.155.175
10910.78.155.176/3010.78.155.177 – 10.78.155.17810.78.155.179
11010.78.155.180/3010.78.155.181 – 10.78.155.18210.78.155.183
11110.78.155.184/3010.78.155.185 – 10.78.155.18610.78.155.187
11210.78.155.188/3010.78.155.189 – 10.78.155.19010.78.155.191
11310.78.155.192/3010.78.155.193 – 10.78.155.19410.78.155.195
11410.78.155.196/3010.78.155.197 – 10.78.155.19810.78.155.199
11510.78.155.200/3010.78.155.201 – 10.78.155.20210.78.155.203
11610.78.155.204/3010.78.155.205 – 10.78.155.20610.78.155.207
11710.78.155.208/3010.78.155.209 – 10.78.155.21010.78.155.211
11810.78.155.212/3010.78.155.213 – 10.78.155.21410.78.155.215
11910.78.155.216/3010.78.155.217 – 10.78.155.21810.78.155.219
12010.78.155.220/3010.78.155.221 – 10.78.155.22210.78.155.223
12110.78.155.224/3010.78.155.225 – 10.78.155.22610.78.155.227
12210.78.155.228/3010.78.155.229 – 10.78.155.23010.78.155.231
12310.78.155.232/3010.78.155.233 – 10.78.155.23410.78.155.235
12410.78.155.236/3010.78.155.237 – 10.78.155.23810.78.155.239
12510.78.155.240/3010.78.155.241 – 10.78.155.24210.78.155.243
12610.78.155.244/3010.78.155.245 – 10.78.155.24610.78.155.247
12710.78.155.248/3010.78.155.249 – 10.78.155.25010.78.155.251
12810.78.155.252/3010.78.155.253 – 10.78.155.25410.78.155.255
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 →