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)10.65.8.0/23
network10.65.8.0/23
broadcast10.65.9.255
first host10.65.8.1
last host10.65.9.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.65.8.0/23
address00001010.01000001.00001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000001.00001000.00000000
broadcast00001010.01000001.00001001.11111111
green = network part, grey = host part
hex0x0a410800
decimal172034048
reverse dns0.8.65.10.in-addr.arpa
ipv4-mapped::ffff:a41:800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.65.8.0/3010.65.8.1 – 10.65.8.210.65.8.3
210.65.8.4/3010.65.8.5 – 10.65.8.610.65.8.7
310.65.8.8/3010.65.8.9 – 10.65.8.1010.65.8.11
410.65.8.12/3010.65.8.13 – 10.65.8.1410.65.8.15
510.65.8.16/3010.65.8.17 – 10.65.8.1810.65.8.19
610.65.8.20/3010.65.8.21 – 10.65.8.2210.65.8.23
710.65.8.24/3010.65.8.25 – 10.65.8.2610.65.8.27
810.65.8.28/3010.65.8.29 – 10.65.8.3010.65.8.31
910.65.8.32/3010.65.8.33 – 10.65.8.3410.65.8.35
1010.65.8.36/3010.65.8.37 – 10.65.8.3810.65.8.39
1110.65.8.40/3010.65.8.41 – 10.65.8.4210.65.8.43
1210.65.8.44/3010.65.8.45 – 10.65.8.4610.65.8.47
1310.65.8.48/3010.65.8.49 – 10.65.8.5010.65.8.51
1410.65.8.52/3010.65.8.53 – 10.65.8.5410.65.8.55
1510.65.8.56/3010.65.8.57 – 10.65.8.5810.65.8.59
1610.65.8.60/3010.65.8.61 – 10.65.8.6210.65.8.63
1710.65.8.64/3010.65.8.65 – 10.65.8.6610.65.8.67
1810.65.8.68/3010.65.8.69 – 10.65.8.7010.65.8.71
1910.65.8.72/3010.65.8.73 – 10.65.8.7410.65.8.75
2010.65.8.76/3010.65.8.77 – 10.65.8.7810.65.8.79
2110.65.8.80/3010.65.8.81 – 10.65.8.8210.65.8.83
2210.65.8.84/3010.65.8.85 – 10.65.8.8610.65.8.87
2310.65.8.88/3010.65.8.89 – 10.65.8.9010.65.8.91
2410.65.8.92/3010.65.8.93 – 10.65.8.9410.65.8.95
2510.65.8.96/3010.65.8.97 – 10.65.8.9810.65.8.99
2610.65.8.100/3010.65.8.101 – 10.65.8.10210.65.8.103
2710.65.8.104/3010.65.8.105 – 10.65.8.10610.65.8.107
2810.65.8.108/3010.65.8.109 – 10.65.8.11010.65.8.111
2910.65.8.112/3010.65.8.113 – 10.65.8.11410.65.8.115
3010.65.8.116/3010.65.8.117 – 10.65.8.11810.65.8.119
3110.65.8.120/3010.65.8.121 – 10.65.8.12210.65.8.123
3210.65.8.124/3010.65.8.125 – 10.65.8.12610.65.8.127
3310.65.8.128/3010.65.8.129 – 10.65.8.13010.65.8.131
3410.65.8.132/3010.65.8.133 – 10.65.8.13410.65.8.135
3510.65.8.136/3010.65.8.137 – 10.65.8.13810.65.8.139
3610.65.8.140/3010.65.8.141 – 10.65.8.14210.65.8.143
3710.65.8.144/3010.65.8.145 – 10.65.8.14610.65.8.147
3810.65.8.148/3010.65.8.149 – 10.65.8.15010.65.8.151
3910.65.8.152/3010.65.8.153 – 10.65.8.15410.65.8.155
4010.65.8.156/3010.65.8.157 – 10.65.8.15810.65.8.159
4110.65.8.160/3010.65.8.161 – 10.65.8.16210.65.8.163
4210.65.8.164/3010.65.8.165 – 10.65.8.16610.65.8.167
4310.65.8.168/3010.65.8.169 – 10.65.8.17010.65.8.171
4410.65.8.172/3010.65.8.173 – 10.65.8.17410.65.8.175
4510.65.8.176/3010.65.8.177 – 10.65.8.17810.65.8.179
4610.65.8.180/3010.65.8.181 – 10.65.8.18210.65.8.183
4710.65.8.184/3010.65.8.185 – 10.65.8.18610.65.8.187
4810.65.8.188/3010.65.8.189 – 10.65.8.19010.65.8.191
4910.65.8.192/3010.65.8.193 – 10.65.8.19410.65.8.195
5010.65.8.196/3010.65.8.197 – 10.65.8.19810.65.8.199
5110.65.8.200/3010.65.8.201 – 10.65.8.20210.65.8.203
5210.65.8.204/3010.65.8.205 – 10.65.8.20610.65.8.207
5310.65.8.208/3010.65.8.209 – 10.65.8.21010.65.8.211
5410.65.8.212/3010.65.8.213 – 10.65.8.21410.65.8.215
5510.65.8.216/3010.65.8.217 – 10.65.8.21810.65.8.219
5610.65.8.220/3010.65.8.221 – 10.65.8.22210.65.8.223
5710.65.8.224/3010.65.8.225 – 10.65.8.22610.65.8.227
5810.65.8.228/3010.65.8.229 – 10.65.8.23010.65.8.231
5910.65.8.232/3010.65.8.233 – 10.65.8.23410.65.8.235
6010.65.8.236/3010.65.8.237 – 10.65.8.23810.65.8.239
6110.65.8.240/3010.65.8.241 – 10.65.8.24210.65.8.243
6210.65.8.244/3010.65.8.245 – 10.65.8.24610.65.8.247
6310.65.8.248/3010.65.8.249 – 10.65.8.25010.65.8.251
6410.65.8.252/3010.65.8.253 – 10.65.8.25410.65.8.255
6510.65.9.0/3010.65.9.1 – 10.65.9.210.65.9.3
6610.65.9.4/3010.65.9.5 – 10.65.9.610.65.9.7
6710.65.9.8/3010.65.9.9 – 10.65.9.1010.65.9.11
6810.65.9.12/3010.65.9.13 – 10.65.9.1410.65.9.15
6910.65.9.16/3010.65.9.17 – 10.65.9.1810.65.9.19
7010.65.9.20/3010.65.9.21 – 10.65.9.2210.65.9.23
7110.65.9.24/3010.65.9.25 – 10.65.9.2610.65.9.27
7210.65.9.28/3010.65.9.29 – 10.65.9.3010.65.9.31
7310.65.9.32/3010.65.9.33 – 10.65.9.3410.65.9.35
7410.65.9.36/3010.65.9.37 – 10.65.9.3810.65.9.39
7510.65.9.40/3010.65.9.41 – 10.65.9.4210.65.9.43
7610.65.9.44/3010.65.9.45 – 10.65.9.4610.65.9.47
7710.65.9.48/3010.65.9.49 – 10.65.9.5010.65.9.51
7810.65.9.52/3010.65.9.53 – 10.65.9.5410.65.9.55
7910.65.9.56/3010.65.9.57 – 10.65.9.5810.65.9.59
8010.65.9.60/3010.65.9.61 – 10.65.9.6210.65.9.63
8110.65.9.64/3010.65.9.65 – 10.65.9.6610.65.9.67
8210.65.9.68/3010.65.9.69 – 10.65.9.7010.65.9.71
8310.65.9.72/3010.65.9.73 – 10.65.9.7410.65.9.75
8410.65.9.76/3010.65.9.77 – 10.65.9.7810.65.9.79
8510.65.9.80/3010.65.9.81 – 10.65.9.8210.65.9.83
8610.65.9.84/3010.65.9.85 – 10.65.9.8610.65.9.87
8710.65.9.88/3010.65.9.89 – 10.65.9.9010.65.9.91
8810.65.9.92/3010.65.9.93 – 10.65.9.9410.65.9.95
8910.65.9.96/3010.65.9.97 – 10.65.9.9810.65.9.99
9010.65.9.100/3010.65.9.101 – 10.65.9.10210.65.9.103
9110.65.9.104/3010.65.9.105 – 10.65.9.10610.65.9.107
9210.65.9.108/3010.65.9.109 – 10.65.9.11010.65.9.111
9310.65.9.112/3010.65.9.113 – 10.65.9.11410.65.9.115
9410.65.9.116/3010.65.9.117 – 10.65.9.11810.65.9.119
9510.65.9.120/3010.65.9.121 – 10.65.9.12210.65.9.123
9610.65.9.124/3010.65.9.125 – 10.65.9.12610.65.9.127
9710.65.9.128/3010.65.9.129 – 10.65.9.13010.65.9.131
9810.65.9.132/3010.65.9.133 – 10.65.9.13410.65.9.135
9910.65.9.136/3010.65.9.137 – 10.65.9.13810.65.9.139
10010.65.9.140/3010.65.9.141 – 10.65.9.14210.65.9.143
10110.65.9.144/3010.65.9.145 – 10.65.9.14610.65.9.147
10210.65.9.148/3010.65.9.149 – 10.65.9.15010.65.9.151
10310.65.9.152/3010.65.9.153 – 10.65.9.15410.65.9.155
10410.65.9.156/3010.65.9.157 – 10.65.9.15810.65.9.159
10510.65.9.160/3010.65.9.161 – 10.65.9.16210.65.9.163
10610.65.9.164/3010.65.9.165 – 10.65.9.16610.65.9.167
10710.65.9.168/3010.65.9.169 – 10.65.9.17010.65.9.171
10810.65.9.172/3010.65.9.173 – 10.65.9.17410.65.9.175
10910.65.9.176/3010.65.9.177 – 10.65.9.17810.65.9.179
11010.65.9.180/3010.65.9.181 – 10.65.9.18210.65.9.183
11110.65.9.184/3010.65.9.185 – 10.65.9.18610.65.9.187
11210.65.9.188/3010.65.9.189 – 10.65.9.19010.65.9.191
11310.65.9.192/3010.65.9.193 – 10.65.9.19410.65.9.195
11410.65.9.196/3010.65.9.197 – 10.65.9.19810.65.9.199
11510.65.9.200/3010.65.9.201 – 10.65.9.20210.65.9.203
11610.65.9.204/3010.65.9.205 – 10.65.9.20610.65.9.207
11710.65.9.208/3010.65.9.209 – 10.65.9.21010.65.9.211
11810.65.9.212/3010.65.9.213 – 10.65.9.21410.65.9.215
11910.65.9.216/3010.65.9.217 – 10.65.9.21810.65.9.219
12010.65.9.220/3010.65.9.221 – 10.65.9.22210.65.9.223
12110.65.9.224/3010.65.9.225 – 10.65.9.22610.65.9.227
12210.65.9.228/3010.65.9.229 – 10.65.9.23010.65.9.231
12310.65.9.232/3010.65.9.233 – 10.65.9.23410.65.9.235
12410.65.9.236/3010.65.9.237 – 10.65.9.23810.65.9.239
12510.65.9.240/3010.65.9.241 – 10.65.9.24210.65.9.243
12610.65.9.244/3010.65.9.245 – 10.65.9.24610.65.9.247
12710.65.9.248/3010.65.9.249 – 10.65.9.25010.65.9.251
12810.65.9.252/3010.65.9.253 – 10.65.9.25410.65.9.255
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 →