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)10.78.170.0/23
network10.78.170.0/23
broadcast10.78.171.255
first host10.78.170.1
last host10.78.171.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.170.0/23
address00001010.01001110.10101010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.10101010.00000000
broadcast00001010.01001110.10101011.11111111
green = network part, grey = host part
hex0x0a4eaa00
decimal172927488
reverse dns0.170.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:aa00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.78.170.0/3010.78.170.1 – 10.78.170.210.78.170.3
210.78.170.4/3010.78.170.5 – 10.78.170.610.78.170.7
310.78.170.8/3010.78.170.9 – 10.78.170.1010.78.170.11
410.78.170.12/3010.78.170.13 – 10.78.170.1410.78.170.15
510.78.170.16/3010.78.170.17 – 10.78.170.1810.78.170.19
610.78.170.20/3010.78.170.21 – 10.78.170.2210.78.170.23
710.78.170.24/3010.78.170.25 – 10.78.170.2610.78.170.27
810.78.170.28/3010.78.170.29 – 10.78.170.3010.78.170.31
910.78.170.32/3010.78.170.33 – 10.78.170.3410.78.170.35
1010.78.170.36/3010.78.170.37 – 10.78.170.3810.78.170.39
1110.78.170.40/3010.78.170.41 – 10.78.170.4210.78.170.43
1210.78.170.44/3010.78.170.45 – 10.78.170.4610.78.170.47
1310.78.170.48/3010.78.170.49 – 10.78.170.5010.78.170.51
1410.78.170.52/3010.78.170.53 – 10.78.170.5410.78.170.55
1510.78.170.56/3010.78.170.57 – 10.78.170.5810.78.170.59
1610.78.170.60/3010.78.170.61 – 10.78.170.6210.78.170.63
1710.78.170.64/3010.78.170.65 – 10.78.170.6610.78.170.67
1810.78.170.68/3010.78.170.69 – 10.78.170.7010.78.170.71
1910.78.170.72/3010.78.170.73 – 10.78.170.7410.78.170.75
2010.78.170.76/3010.78.170.77 – 10.78.170.7810.78.170.79
2110.78.170.80/3010.78.170.81 – 10.78.170.8210.78.170.83
2210.78.170.84/3010.78.170.85 – 10.78.170.8610.78.170.87
2310.78.170.88/3010.78.170.89 – 10.78.170.9010.78.170.91
2410.78.170.92/3010.78.170.93 – 10.78.170.9410.78.170.95
2510.78.170.96/3010.78.170.97 – 10.78.170.9810.78.170.99
2610.78.170.100/3010.78.170.101 – 10.78.170.10210.78.170.103
2710.78.170.104/3010.78.170.105 – 10.78.170.10610.78.170.107
2810.78.170.108/3010.78.170.109 – 10.78.170.11010.78.170.111
2910.78.170.112/3010.78.170.113 – 10.78.170.11410.78.170.115
3010.78.170.116/3010.78.170.117 – 10.78.170.11810.78.170.119
3110.78.170.120/3010.78.170.121 – 10.78.170.12210.78.170.123
3210.78.170.124/3010.78.170.125 – 10.78.170.12610.78.170.127
3310.78.170.128/3010.78.170.129 – 10.78.170.13010.78.170.131
3410.78.170.132/3010.78.170.133 – 10.78.170.13410.78.170.135
3510.78.170.136/3010.78.170.137 – 10.78.170.13810.78.170.139
3610.78.170.140/3010.78.170.141 – 10.78.170.14210.78.170.143
3710.78.170.144/3010.78.170.145 – 10.78.170.14610.78.170.147
3810.78.170.148/3010.78.170.149 – 10.78.170.15010.78.170.151
3910.78.170.152/3010.78.170.153 – 10.78.170.15410.78.170.155
4010.78.170.156/3010.78.170.157 – 10.78.170.15810.78.170.159
4110.78.170.160/3010.78.170.161 – 10.78.170.16210.78.170.163
4210.78.170.164/3010.78.170.165 – 10.78.170.16610.78.170.167
4310.78.170.168/3010.78.170.169 – 10.78.170.17010.78.170.171
4410.78.170.172/3010.78.170.173 – 10.78.170.17410.78.170.175
4510.78.170.176/3010.78.170.177 – 10.78.170.17810.78.170.179
4610.78.170.180/3010.78.170.181 – 10.78.170.18210.78.170.183
4710.78.170.184/3010.78.170.185 – 10.78.170.18610.78.170.187
4810.78.170.188/3010.78.170.189 – 10.78.170.19010.78.170.191
4910.78.170.192/3010.78.170.193 – 10.78.170.19410.78.170.195
5010.78.170.196/3010.78.170.197 – 10.78.170.19810.78.170.199
5110.78.170.200/3010.78.170.201 – 10.78.170.20210.78.170.203
5210.78.170.204/3010.78.170.205 – 10.78.170.20610.78.170.207
5310.78.170.208/3010.78.170.209 – 10.78.170.21010.78.170.211
5410.78.170.212/3010.78.170.213 – 10.78.170.21410.78.170.215
5510.78.170.216/3010.78.170.217 – 10.78.170.21810.78.170.219
5610.78.170.220/3010.78.170.221 – 10.78.170.22210.78.170.223
5710.78.170.224/3010.78.170.225 – 10.78.170.22610.78.170.227
5810.78.170.228/3010.78.170.229 – 10.78.170.23010.78.170.231
5910.78.170.232/3010.78.170.233 – 10.78.170.23410.78.170.235
6010.78.170.236/3010.78.170.237 – 10.78.170.23810.78.170.239
6110.78.170.240/3010.78.170.241 – 10.78.170.24210.78.170.243
6210.78.170.244/3010.78.170.245 – 10.78.170.24610.78.170.247
6310.78.170.248/3010.78.170.249 – 10.78.170.25010.78.170.251
6410.78.170.252/3010.78.170.253 – 10.78.170.25410.78.170.255
6510.78.171.0/3010.78.171.1 – 10.78.171.210.78.171.3
6610.78.171.4/3010.78.171.5 – 10.78.171.610.78.171.7
6710.78.171.8/3010.78.171.9 – 10.78.171.1010.78.171.11
6810.78.171.12/3010.78.171.13 – 10.78.171.1410.78.171.15
6910.78.171.16/3010.78.171.17 – 10.78.171.1810.78.171.19
7010.78.171.20/3010.78.171.21 – 10.78.171.2210.78.171.23
7110.78.171.24/3010.78.171.25 – 10.78.171.2610.78.171.27
7210.78.171.28/3010.78.171.29 – 10.78.171.3010.78.171.31
7310.78.171.32/3010.78.171.33 – 10.78.171.3410.78.171.35
7410.78.171.36/3010.78.171.37 – 10.78.171.3810.78.171.39
7510.78.171.40/3010.78.171.41 – 10.78.171.4210.78.171.43
7610.78.171.44/3010.78.171.45 – 10.78.171.4610.78.171.47
7710.78.171.48/3010.78.171.49 – 10.78.171.5010.78.171.51
7810.78.171.52/3010.78.171.53 – 10.78.171.5410.78.171.55
7910.78.171.56/3010.78.171.57 – 10.78.171.5810.78.171.59
8010.78.171.60/3010.78.171.61 – 10.78.171.6210.78.171.63
8110.78.171.64/3010.78.171.65 – 10.78.171.6610.78.171.67
8210.78.171.68/3010.78.171.69 – 10.78.171.7010.78.171.71
8310.78.171.72/3010.78.171.73 – 10.78.171.7410.78.171.75
8410.78.171.76/3010.78.171.77 – 10.78.171.7810.78.171.79
8510.78.171.80/3010.78.171.81 – 10.78.171.8210.78.171.83
8610.78.171.84/3010.78.171.85 – 10.78.171.8610.78.171.87
8710.78.171.88/3010.78.171.89 – 10.78.171.9010.78.171.91
8810.78.171.92/3010.78.171.93 – 10.78.171.9410.78.171.95
8910.78.171.96/3010.78.171.97 – 10.78.171.9810.78.171.99
9010.78.171.100/3010.78.171.101 – 10.78.171.10210.78.171.103
9110.78.171.104/3010.78.171.105 – 10.78.171.10610.78.171.107
9210.78.171.108/3010.78.171.109 – 10.78.171.11010.78.171.111
9310.78.171.112/3010.78.171.113 – 10.78.171.11410.78.171.115
9410.78.171.116/3010.78.171.117 – 10.78.171.11810.78.171.119
9510.78.171.120/3010.78.171.121 – 10.78.171.12210.78.171.123
9610.78.171.124/3010.78.171.125 – 10.78.171.12610.78.171.127
9710.78.171.128/3010.78.171.129 – 10.78.171.13010.78.171.131
9810.78.171.132/3010.78.171.133 – 10.78.171.13410.78.171.135
9910.78.171.136/3010.78.171.137 – 10.78.171.13810.78.171.139
10010.78.171.140/3010.78.171.141 – 10.78.171.14210.78.171.143
10110.78.171.144/3010.78.171.145 – 10.78.171.14610.78.171.147
10210.78.171.148/3010.78.171.149 – 10.78.171.15010.78.171.151
10310.78.171.152/3010.78.171.153 – 10.78.171.15410.78.171.155
10410.78.171.156/3010.78.171.157 – 10.78.171.15810.78.171.159
10510.78.171.160/3010.78.171.161 – 10.78.171.16210.78.171.163
10610.78.171.164/3010.78.171.165 – 10.78.171.16610.78.171.167
10710.78.171.168/3010.78.171.169 – 10.78.171.17010.78.171.171
10810.78.171.172/3010.78.171.173 – 10.78.171.17410.78.171.175
10910.78.171.176/3010.78.171.177 – 10.78.171.17810.78.171.179
11010.78.171.180/3010.78.171.181 – 10.78.171.18210.78.171.183
11110.78.171.184/3010.78.171.185 – 10.78.171.18610.78.171.187
11210.78.171.188/3010.78.171.189 – 10.78.171.19010.78.171.191
11310.78.171.192/3010.78.171.193 – 10.78.171.19410.78.171.195
11410.78.171.196/3010.78.171.197 – 10.78.171.19810.78.171.199
11510.78.171.200/3010.78.171.201 – 10.78.171.20210.78.171.203
11610.78.171.204/3010.78.171.205 – 10.78.171.20610.78.171.207
11710.78.171.208/3010.78.171.209 – 10.78.171.21010.78.171.211
11810.78.171.212/3010.78.171.213 – 10.78.171.21410.78.171.215
11910.78.171.216/3010.78.171.217 – 10.78.171.21810.78.171.219
12010.78.171.220/3010.78.171.221 – 10.78.171.22210.78.171.223
12110.78.171.224/3010.78.171.225 – 10.78.171.22610.78.171.227
12210.78.171.228/3010.78.171.229 – 10.78.171.23010.78.171.231
12310.78.171.232/3010.78.171.233 – 10.78.171.23410.78.171.235
12410.78.171.236/3010.78.171.237 – 10.78.171.23810.78.171.239
12510.78.171.240/3010.78.171.241 – 10.78.171.24210.78.171.243
12610.78.171.244/3010.78.171.245 – 10.78.171.24610.78.171.247
12710.78.171.248/3010.78.171.249 – 10.78.171.25010.78.171.251
12810.78.171.252/3010.78.171.253 – 10.78.171.25410.78.171.255
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 →