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)10.3.6.0/23
network10.3.6.0/23
broadcast10.3.7.255
first host10.3.6.1
last host10.3.7.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.3.6.0/23
address00001010.00000011.00000110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000011.00000110.00000000
broadcast00001010.00000011.00000111.11111111
green = network part, grey = host part
hex0x0a030600
decimal167970304
reverse dns0.6.3.10.in-addr.arpa
ipv4-mapped::ffff:a03:600

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.3.6.0/3010.3.6.1 – 10.3.6.210.3.6.3
210.3.6.4/3010.3.6.5 – 10.3.6.610.3.6.7
310.3.6.8/3010.3.6.9 – 10.3.6.1010.3.6.11
410.3.6.12/3010.3.6.13 – 10.3.6.1410.3.6.15
510.3.6.16/3010.3.6.17 – 10.3.6.1810.3.6.19
610.3.6.20/3010.3.6.21 – 10.3.6.2210.3.6.23
710.3.6.24/3010.3.6.25 – 10.3.6.2610.3.6.27
810.3.6.28/3010.3.6.29 – 10.3.6.3010.3.6.31
910.3.6.32/3010.3.6.33 – 10.3.6.3410.3.6.35
1010.3.6.36/3010.3.6.37 – 10.3.6.3810.3.6.39
1110.3.6.40/3010.3.6.41 – 10.3.6.4210.3.6.43
1210.3.6.44/3010.3.6.45 – 10.3.6.4610.3.6.47
1310.3.6.48/3010.3.6.49 – 10.3.6.5010.3.6.51
1410.3.6.52/3010.3.6.53 – 10.3.6.5410.3.6.55
1510.3.6.56/3010.3.6.57 – 10.3.6.5810.3.6.59
1610.3.6.60/3010.3.6.61 – 10.3.6.6210.3.6.63
1710.3.6.64/3010.3.6.65 – 10.3.6.6610.3.6.67
1810.3.6.68/3010.3.6.69 – 10.3.6.7010.3.6.71
1910.3.6.72/3010.3.6.73 – 10.3.6.7410.3.6.75
2010.3.6.76/3010.3.6.77 – 10.3.6.7810.3.6.79
2110.3.6.80/3010.3.6.81 – 10.3.6.8210.3.6.83
2210.3.6.84/3010.3.6.85 – 10.3.6.8610.3.6.87
2310.3.6.88/3010.3.6.89 – 10.3.6.9010.3.6.91
2410.3.6.92/3010.3.6.93 – 10.3.6.9410.3.6.95
2510.3.6.96/3010.3.6.97 – 10.3.6.9810.3.6.99
2610.3.6.100/3010.3.6.101 – 10.3.6.10210.3.6.103
2710.3.6.104/3010.3.6.105 – 10.3.6.10610.3.6.107
2810.3.6.108/3010.3.6.109 – 10.3.6.11010.3.6.111
2910.3.6.112/3010.3.6.113 – 10.3.6.11410.3.6.115
3010.3.6.116/3010.3.6.117 – 10.3.6.11810.3.6.119
3110.3.6.120/3010.3.6.121 – 10.3.6.12210.3.6.123
3210.3.6.124/3010.3.6.125 – 10.3.6.12610.3.6.127
3310.3.6.128/3010.3.6.129 – 10.3.6.13010.3.6.131
3410.3.6.132/3010.3.6.133 – 10.3.6.13410.3.6.135
3510.3.6.136/3010.3.6.137 – 10.3.6.13810.3.6.139
3610.3.6.140/3010.3.6.141 – 10.3.6.14210.3.6.143
3710.3.6.144/3010.3.6.145 – 10.3.6.14610.3.6.147
3810.3.6.148/3010.3.6.149 – 10.3.6.15010.3.6.151
3910.3.6.152/3010.3.6.153 – 10.3.6.15410.3.6.155
4010.3.6.156/3010.3.6.157 – 10.3.6.15810.3.6.159
4110.3.6.160/3010.3.6.161 – 10.3.6.16210.3.6.163
4210.3.6.164/3010.3.6.165 – 10.3.6.16610.3.6.167
4310.3.6.168/3010.3.6.169 – 10.3.6.17010.3.6.171
4410.3.6.172/3010.3.6.173 – 10.3.6.17410.3.6.175
4510.3.6.176/3010.3.6.177 – 10.3.6.17810.3.6.179
4610.3.6.180/3010.3.6.181 – 10.3.6.18210.3.6.183
4710.3.6.184/3010.3.6.185 – 10.3.6.18610.3.6.187
4810.3.6.188/3010.3.6.189 – 10.3.6.19010.3.6.191
4910.3.6.192/3010.3.6.193 – 10.3.6.19410.3.6.195
5010.3.6.196/3010.3.6.197 – 10.3.6.19810.3.6.199
5110.3.6.200/3010.3.6.201 – 10.3.6.20210.3.6.203
5210.3.6.204/3010.3.6.205 – 10.3.6.20610.3.6.207
5310.3.6.208/3010.3.6.209 – 10.3.6.21010.3.6.211
5410.3.6.212/3010.3.6.213 – 10.3.6.21410.3.6.215
5510.3.6.216/3010.3.6.217 – 10.3.6.21810.3.6.219
5610.3.6.220/3010.3.6.221 – 10.3.6.22210.3.6.223
5710.3.6.224/3010.3.6.225 – 10.3.6.22610.3.6.227
5810.3.6.228/3010.3.6.229 – 10.3.6.23010.3.6.231
5910.3.6.232/3010.3.6.233 – 10.3.6.23410.3.6.235
6010.3.6.236/3010.3.6.237 – 10.3.6.23810.3.6.239
6110.3.6.240/3010.3.6.241 – 10.3.6.24210.3.6.243
6210.3.6.244/3010.3.6.245 – 10.3.6.24610.3.6.247
6310.3.6.248/3010.3.6.249 – 10.3.6.25010.3.6.251
6410.3.6.252/3010.3.6.253 – 10.3.6.25410.3.6.255
6510.3.7.0/3010.3.7.1 – 10.3.7.210.3.7.3
6610.3.7.4/3010.3.7.5 – 10.3.7.610.3.7.7
6710.3.7.8/3010.3.7.9 – 10.3.7.1010.3.7.11
6810.3.7.12/3010.3.7.13 – 10.3.7.1410.3.7.15
6910.3.7.16/3010.3.7.17 – 10.3.7.1810.3.7.19
7010.3.7.20/3010.3.7.21 – 10.3.7.2210.3.7.23
7110.3.7.24/3010.3.7.25 – 10.3.7.2610.3.7.27
7210.3.7.28/3010.3.7.29 – 10.3.7.3010.3.7.31
7310.3.7.32/3010.3.7.33 – 10.3.7.3410.3.7.35
7410.3.7.36/3010.3.7.37 – 10.3.7.3810.3.7.39
7510.3.7.40/3010.3.7.41 – 10.3.7.4210.3.7.43
7610.3.7.44/3010.3.7.45 – 10.3.7.4610.3.7.47
7710.3.7.48/3010.3.7.49 – 10.3.7.5010.3.7.51
7810.3.7.52/3010.3.7.53 – 10.3.7.5410.3.7.55
7910.3.7.56/3010.3.7.57 – 10.3.7.5810.3.7.59
8010.3.7.60/3010.3.7.61 – 10.3.7.6210.3.7.63
8110.3.7.64/3010.3.7.65 – 10.3.7.6610.3.7.67
8210.3.7.68/3010.3.7.69 – 10.3.7.7010.3.7.71
8310.3.7.72/3010.3.7.73 – 10.3.7.7410.3.7.75
8410.3.7.76/3010.3.7.77 – 10.3.7.7810.3.7.79
8510.3.7.80/3010.3.7.81 – 10.3.7.8210.3.7.83
8610.3.7.84/3010.3.7.85 – 10.3.7.8610.3.7.87
8710.3.7.88/3010.3.7.89 – 10.3.7.9010.3.7.91
8810.3.7.92/3010.3.7.93 – 10.3.7.9410.3.7.95
8910.3.7.96/3010.3.7.97 – 10.3.7.9810.3.7.99
9010.3.7.100/3010.3.7.101 – 10.3.7.10210.3.7.103
9110.3.7.104/3010.3.7.105 – 10.3.7.10610.3.7.107
9210.3.7.108/3010.3.7.109 – 10.3.7.11010.3.7.111
9310.3.7.112/3010.3.7.113 – 10.3.7.11410.3.7.115
9410.3.7.116/3010.3.7.117 – 10.3.7.11810.3.7.119
9510.3.7.120/3010.3.7.121 – 10.3.7.12210.3.7.123
9610.3.7.124/3010.3.7.125 – 10.3.7.12610.3.7.127
9710.3.7.128/3010.3.7.129 – 10.3.7.13010.3.7.131
9810.3.7.132/3010.3.7.133 – 10.3.7.13410.3.7.135
9910.3.7.136/3010.3.7.137 – 10.3.7.13810.3.7.139
10010.3.7.140/3010.3.7.141 – 10.3.7.14210.3.7.143
10110.3.7.144/3010.3.7.145 – 10.3.7.14610.3.7.147
10210.3.7.148/3010.3.7.149 – 10.3.7.15010.3.7.151
10310.3.7.152/3010.3.7.153 – 10.3.7.15410.3.7.155
10410.3.7.156/3010.3.7.157 – 10.3.7.15810.3.7.159
10510.3.7.160/3010.3.7.161 – 10.3.7.16210.3.7.163
10610.3.7.164/3010.3.7.165 – 10.3.7.16610.3.7.167
10710.3.7.168/3010.3.7.169 – 10.3.7.17010.3.7.171
10810.3.7.172/3010.3.7.173 – 10.3.7.17410.3.7.175
10910.3.7.176/3010.3.7.177 – 10.3.7.17810.3.7.179
11010.3.7.180/3010.3.7.181 – 10.3.7.18210.3.7.183
11110.3.7.184/3010.3.7.185 – 10.3.7.18610.3.7.187
11210.3.7.188/3010.3.7.189 – 10.3.7.19010.3.7.191
11310.3.7.192/3010.3.7.193 – 10.3.7.19410.3.7.195
11410.3.7.196/3010.3.7.197 – 10.3.7.19810.3.7.199
11510.3.7.200/3010.3.7.201 – 10.3.7.20210.3.7.203
11610.3.7.204/3010.3.7.205 – 10.3.7.20610.3.7.207
11710.3.7.208/3010.3.7.209 – 10.3.7.21010.3.7.211
11810.3.7.212/3010.3.7.213 – 10.3.7.21410.3.7.215
11910.3.7.216/3010.3.7.217 – 10.3.7.21810.3.7.219
12010.3.7.220/3010.3.7.221 – 10.3.7.22210.3.7.223
12110.3.7.224/3010.3.7.225 – 10.3.7.22610.3.7.227
12210.3.7.228/3010.3.7.229 – 10.3.7.23010.3.7.231
12310.3.7.232/3010.3.7.233 – 10.3.7.23410.3.7.235
12410.3.7.236/3010.3.7.237 – 10.3.7.23810.3.7.239
12510.3.7.240/3010.3.7.241 – 10.3.7.24210.3.7.243
12610.3.7.244/3010.3.7.245 – 10.3.7.24610.3.7.247
12710.3.7.248/3010.3.7.249 – 10.3.7.25010.3.7.251
12810.3.7.252/3010.3.7.253 – 10.3.7.25410.3.7.255
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 →