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)10.65.6.0/23
network10.65.6.0/23
broadcast10.65.7.255
first host10.65.6.1
last host10.65.7.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.65.6.0/23
address00001010.01000001.00000110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000001.00000110.00000000
broadcast00001010.01000001.00000111.11111111
green = network part, grey = host part
hex0x0a410600
decimal172033536
reverse dns0.6.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:600

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.65.6.0/3010.65.6.1 – 10.65.6.210.65.6.3
210.65.6.4/3010.65.6.5 – 10.65.6.610.65.6.7
310.65.6.8/3010.65.6.9 – 10.65.6.1010.65.6.11
410.65.6.12/3010.65.6.13 – 10.65.6.1410.65.6.15
510.65.6.16/3010.65.6.17 – 10.65.6.1810.65.6.19
610.65.6.20/3010.65.6.21 – 10.65.6.2210.65.6.23
710.65.6.24/3010.65.6.25 – 10.65.6.2610.65.6.27
810.65.6.28/3010.65.6.29 – 10.65.6.3010.65.6.31
910.65.6.32/3010.65.6.33 – 10.65.6.3410.65.6.35
1010.65.6.36/3010.65.6.37 – 10.65.6.3810.65.6.39
1110.65.6.40/3010.65.6.41 – 10.65.6.4210.65.6.43
1210.65.6.44/3010.65.6.45 – 10.65.6.4610.65.6.47
1310.65.6.48/3010.65.6.49 – 10.65.6.5010.65.6.51
1410.65.6.52/3010.65.6.53 – 10.65.6.5410.65.6.55
1510.65.6.56/3010.65.6.57 – 10.65.6.5810.65.6.59
1610.65.6.60/3010.65.6.61 – 10.65.6.6210.65.6.63
1710.65.6.64/3010.65.6.65 – 10.65.6.6610.65.6.67
1810.65.6.68/3010.65.6.69 – 10.65.6.7010.65.6.71
1910.65.6.72/3010.65.6.73 – 10.65.6.7410.65.6.75
2010.65.6.76/3010.65.6.77 – 10.65.6.7810.65.6.79
2110.65.6.80/3010.65.6.81 – 10.65.6.8210.65.6.83
2210.65.6.84/3010.65.6.85 – 10.65.6.8610.65.6.87
2310.65.6.88/3010.65.6.89 – 10.65.6.9010.65.6.91
2410.65.6.92/3010.65.6.93 – 10.65.6.9410.65.6.95
2510.65.6.96/3010.65.6.97 – 10.65.6.9810.65.6.99
2610.65.6.100/3010.65.6.101 – 10.65.6.10210.65.6.103
2710.65.6.104/3010.65.6.105 – 10.65.6.10610.65.6.107
2810.65.6.108/3010.65.6.109 – 10.65.6.11010.65.6.111
2910.65.6.112/3010.65.6.113 – 10.65.6.11410.65.6.115
3010.65.6.116/3010.65.6.117 – 10.65.6.11810.65.6.119
3110.65.6.120/3010.65.6.121 – 10.65.6.12210.65.6.123
3210.65.6.124/3010.65.6.125 – 10.65.6.12610.65.6.127
3310.65.6.128/3010.65.6.129 – 10.65.6.13010.65.6.131
3410.65.6.132/3010.65.6.133 – 10.65.6.13410.65.6.135
3510.65.6.136/3010.65.6.137 – 10.65.6.13810.65.6.139
3610.65.6.140/3010.65.6.141 – 10.65.6.14210.65.6.143
3710.65.6.144/3010.65.6.145 – 10.65.6.14610.65.6.147
3810.65.6.148/3010.65.6.149 – 10.65.6.15010.65.6.151
3910.65.6.152/3010.65.6.153 – 10.65.6.15410.65.6.155
4010.65.6.156/3010.65.6.157 – 10.65.6.15810.65.6.159
4110.65.6.160/3010.65.6.161 – 10.65.6.16210.65.6.163
4210.65.6.164/3010.65.6.165 – 10.65.6.16610.65.6.167
4310.65.6.168/3010.65.6.169 – 10.65.6.17010.65.6.171
4410.65.6.172/3010.65.6.173 – 10.65.6.17410.65.6.175
4510.65.6.176/3010.65.6.177 – 10.65.6.17810.65.6.179
4610.65.6.180/3010.65.6.181 – 10.65.6.18210.65.6.183
4710.65.6.184/3010.65.6.185 – 10.65.6.18610.65.6.187
4810.65.6.188/3010.65.6.189 – 10.65.6.19010.65.6.191
4910.65.6.192/3010.65.6.193 – 10.65.6.19410.65.6.195
5010.65.6.196/3010.65.6.197 – 10.65.6.19810.65.6.199
5110.65.6.200/3010.65.6.201 – 10.65.6.20210.65.6.203
5210.65.6.204/3010.65.6.205 – 10.65.6.20610.65.6.207
5310.65.6.208/3010.65.6.209 – 10.65.6.21010.65.6.211
5410.65.6.212/3010.65.6.213 – 10.65.6.21410.65.6.215
5510.65.6.216/3010.65.6.217 – 10.65.6.21810.65.6.219
5610.65.6.220/3010.65.6.221 – 10.65.6.22210.65.6.223
5710.65.6.224/3010.65.6.225 – 10.65.6.22610.65.6.227
5810.65.6.228/3010.65.6.229 – 10.65.6.23010.65.6.231
5910.65.6.232/3010.65.6.233 – 10.65.6.23410.65.6.235
6010.65.6.236/3010.65.6.237 – 10.65.6.23810.65.6.239
6110.65.6.240/3010.65.6.241 – 10.65.6.24210.65.6.243
6210.65.6.244/3010.65.6.245 – 10.65.6.24610.65.6.247
6310.65.6.248/3010.65.6.249 – 10.65.6.25010.65.6.251
6410.65.6.252/3010.65.6.253 – 10.65.6.25410.65.6.255
6510.65.7.0/3010.65.7.1 – 10.65.7.210.65.7.3
6610.65.7.4/3010.65.7.5 – 10.65.7.610.65.7.7
6710.65.7.8/3010.65.7.9 – 10.65.7.1010.65.7.11
6810.65.7.12/3010.65.7.13 – 10.65.7.1410.65.7.15
6910.65.7.16/3010.65.7.17 – 10.65.7.1810.65.7.19
7010.65.7.20/3010.65.7.21 – 10.65.7.2210.65.7.23
7110.65.7.24/3010.65.7.25 – 10.65.7.2610.65.7.27
7210.65.7.28/3010.65.7.29 – 10.65.7.3010.65.7.31
7310.65.7.32/3010.65.7.33 – 10.65.7.3410.65.7.35
7410.65.7.36/3010.65.7.37 – 10.65.7.3810.65.7.39
7510.65.7.40/3010.65.7.41 – 10.65.7.4210.65.7.43
7610.65.7.44/3010.65.7.45 – 10.65.7.4610.65.7.47
7710.65.7.48/3010.65.7.49 – 10.65.7.5010.65.7.51
7810.65.7.52/3010.65.7.53 – 10.65.7.5410.65.7.55
7910.65.7.56/3010.65.7.57 – 10.65.7.5810.65.7.59
8010.65.7.60/3010.65.7.61 – 10.65.7.6210.65.7.63
8110.65.7.64/3010.65.7.65 – 10.65.7.6610.65.7.67
8210.65.7.68/3010.65.7.69 – 10.65.7.7010.65.7.71
8310.65.7.72/3010.65.7.73 – 10.65.7.7410.65.7.75
8410.65.7.76/3010.65.7.77 – 10.65.7.7810.65.7.79
8510.65.7.80/3010.65.7.81 – 10.65.7.8210.65.7.83
8610.65.7.84/3010.65.7.85 – 10.65.7.8610.65.7.87
8710.65.7.88/3010.65.7.89 – 10.65.7.9010.65.7.91
8810.65.7.92/3010.65.7.93 – 10.65.7.9410.65.7.95
8910.65.7.96/3010.65.7.97 – 10.65.7.9810.65.7.99
9010.65.7.100/3010.65.7.101 – 10.65.7.10210.65.7.103
9110.65.7.104/3010.65.7.105 – 10.65.7.10610.65.7.107
9210.65.7.108/3010.65.7.109 – 10.65.7.11010.65.7.111
9310.65.7.112/3010.65.7.113 – 10.65.7.11410.65.7.115
9410.65.7.116/3010.65.7.117 – 10.65.7.11810.65.7.119
9510.65.7.120/3010.65.7.121 – 10.65.7.12210.65.7.123
9610.65.7.124/3010.65.7.125 – 10.65.7.12610.65.7.127
9710.65.7.128/3010.65.7.129 – 10.65.7.13010.65.7.131
9810.65.7.132/3010.65.7.133 – 10.65.7.13410.65.7.135
9910.65.7.136/3010.65.7.137 – 10.65.7.13810.65.7.139
10010.65.7.140/3010.65.7.141 – 10.65.7.14210.65.7.143
10110.65.7.144/3010.65.7.145 – 10.65.7.14610.65.7.147
10210.65.7.148/3010.65.7.149 – 10.65.7.15010.65.7.151
10310.65.7.152/3010.65.7.153 – 10.65.7.15410.65.7.155
10410.65.7.156/3010.65.7.157 – 10.65.7.15810.65.7.159
10510.65.7.160/3010.65.7.161 – 10.65.7.16210.65.7.163
10610.65.7.164/3010.65.7.165 – 10.65.7.16610.65.7.167
10710.65.7.168/3010.65.7.169 – 10.65.7.17010.65.7.171
10810.65.7.172/3010.65.7.173 – 10.65.7.17410.65.7.175
10910.65.7.176/3010.65.7.177 – 10.65.7.17810.65.7.179
11010.65.7.180/3010.65.7.181 – 10.65.7.18210.65.7.183
11110.65.7.184/3010.65.7.185 – 10.65.7.18610.65.7.187
11210.65.7.188/3010.65.7.189 – 10.65.7.19010.65.7.191
11310.65.7.192/3010.65.7.193 – 10.65.7.19410.65.7.195
11410.65.7.196/3010.65.7.197 – 10.65.7.19810.65.7.199
11510.65.7.200/3010.65.7.201 – 10.65.7.20210.65.7.203
11610.65.7.204/3010.65.7.205 – 10.65.7.20610.65.7.207
11710.65.7.208/3010.65.7.209 – 10.65.7.21010.65.7.211
11810.65.7.212/3010.65.7.213 – 10.65.7.21410.65.7.215
11910.65.7.216/3010.65.7.217 – 10.65.7.21810.65.7.219
12010.65.7.220/3010.65.7.221 – 10.65.7.22210.65.7.223
12110.65.7.224/3010.65.7.225 – 10.65.7.22610.65.7.227
12210.65.7.228/3010.65.7.229 – 10.65.7.23010.65.7.231
12310.65.7.232/3010.65.7.233 – 10.65.7.23410.65.7.235
12410.65.7.236/3010.65.7.237 – 10.65.7.23810.65.7.239
12510.65.7.240/3010.65.7.241 – 10.65.7.24210.65.7.243
12610.65.7.244/3010.65.7.245 – 10.65.7.24610.65.7.247
12710.65.7.248/3010.65.7.249 – 10.65.7.25010.65.7.251
12810.65.7.252/3010.65.7.253 – 10.65.7.25410.65.7.255
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 →