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)10.2.130.0/23
network10.2.130.0/23
broadcast10.2.131.255
first host10.2.130.1
last host10.2.131.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.2.130.0/23
address00001010.00000010.10000010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000010.10000010.00000000
broadcast00001010.00000010.10000011.11111111
green = network part, grey = host part
hex0x0a028200
decimal167936512
reverse dns0.130.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:8200

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.130.0/3010.2.130.1 – 10.2.130.210.2.130.3
210.2.130.4/3010.2.130.5 – 10.2.130.610.2.130.7
310.2.130.8/3010.2.130.9 – 10.2.130.1010.2.130.11
410.2.130.12/3010.2.130.13 – 10.2.130.1410.2.130.15
510.2.130.16/3010.2.130.17 – 10.2.130.1810.2.130.19
610.2.130.20/3010.2.130.21 – 10.2.130.2210.2.130.23
710.2.130.24/3010.2.130.25 – 10.2.130.2610.2.130.27
810.2.130.28/3010.2.130.29 – 10.2.130.3010.2.130.31
910.2.130.32/3010.2.130.33 – 10.2.130.3410.2.130.35
1010.2.130.36/3010.2.130.37 – 10.2.130.3810.2.130.39
1110.2.130.40/3010.2.130.41 – 10.2.130.4210.2.130.43
1210.2.130.44/3010.2.130.45 – 10.2.130.4610.2.130.47
1310.2.130.48/3010.2.130.49 – 10.2.130.5010.2.130.51
1410.2.130.52/3010.2.130.53 – 10.2.130.5410.2.130.55
1510.2.130.56/3010.2.130.57 – 10.2.130.5810.2.130.59
1610.2.130.60/3010.2.130.61 – 10.2.130.6210.2.130.63
1710.2.130.64/3010.2.130.65 – 10.2.130.6610.2.130.67
1810.2.130.68/3010.2.130.69 – 10.2.130.7010.2.130.71
1910.2.130.72/3010.2.130.73 – 10.2.130.7410.2.130.75
2010.2.130.76/3010.2.130.77 – 10.2.130.7810.2.130.79
2110.2.130.80/3010.2.130.81 – 10.2.130.8210.2.130.83
2210.2.130.84/3010.2.130.85 – 10.2.130.8610.2.130.87
2310.2.130.88/3010.2.130.89 – 10.2.130.9010.2.130.91
2410.2.130.92/3010.2.130.93 – 10.2.130.9410.2.130.95
2510.2.130.96/3010.2.130.97 – 10.2.130.9810.2.130.99
2610.2.130.100/3010.2.130.101 – 10.2.130.10210.2.130.103
2710.2.130.104/3010.2.130.105 – 10.2.130.10610.2.130.107
2810.2.130.108/3010.2.130.109 – 10.2.130.11010.2.130.111
2910.2.130.112/3010.2.130.113 – 10.2.130.11410.2.130.115
3010.2.130.116/3010.2.130.117 – 10.2.130.11810.2.130.119
3110.2.130.120/3010.2.130.121 – 10.2.130.12210.2.130.123
3210.2.130.124/3010.2.130.125 – 10.2.130.12610.2.130.127
3310.2.130.128/3010.2.130.129 – 10.2.130.13010.2.130.131
3410.2.130.132/3010.2.130.133 – 10.2.130.13410.2.130.135
3510.2.130.136/3010.2.130.137 – 10.2.130.13810.2.130.139
3610.2.130.140/3010.2.130.141 – 10.2.130.14210.2.130.143
3710.2.130.144/3010.2.130.145 – 10.2.130.14610.2.130.147
3810.2.130.148/3010.2.130.149 – 10.2.130.15010.2.130.151
3910.2.130.152/3010.2.130.153 – 10.2.130.15410.2.130.155
4010.2.130.156/3010.2.130.157 – 10.2.130.15810.2.130.159
4110.2.130.160/3010.2.130.161 – 10.2.130.16210.2.130.163
4210.2.130.164/3010.2.130.165 – 10.2.130.16610.2.130.167
4310.2.130.168/3010.2.130.169 – 10.2.130.17010.2.130.171
4410.2.130.172/3010.2.130.173 – 10.2.130.17410.2.130.175
4510.2.130.176/3010.2.130.177 – 10.2.130.17810.2.130.179
4610.2.130.180/3010.2.130.181 – 10.2.130.18210.2.130.183
4710.2.130.184/3010.2.130.185 – 10.2.130.18610.2.130.187
4810.2.130.188/3010.2.130.189 – 10.2.130.19010.2.130.191
4910.2.130.192/3010.2.130.193 – 10.2.130.19410.2.130.195
5010.2.130.196/3010.2.130.197 – 10.2.130.19810.2.130.199
5110.2.130.200/3010.2.130.201 – 10.2.130.20210.2.130.203
5210.2.130.204/3010.2.130.205 – 10.2.130.20610.2.130.207
5310.2.130.208/3010.2.130.209 – 10.2.130.21010.2.130.211
5410.2.130.212/3010.2.130.213 – 10.2.130.21410.2.130.215
5510.2.130.216/3010.2.130.217 – 10.2.130.21810.2.130.219
5610.2.130.220/3010.2.130.221 – 10.2.130.22210.2.130.223
5710.2.130.224/3010.2.130.225 – 10.2.130.22610.2.130.227
5810.2.130.228/3010.2.130.229 – 10.2.130.23010.2.130.231
5910.2.130.232/3010.2.130.233 – 10.2.130.23410.2.130.235
6010.2.130.236/3010.2.130.237 – 10.2.130.23810.2.130.239
6110.2.130.240/3010.2.130.241 – 10.2.130.24210.2.130.243
6210.2.130.244/3010.2.130.245 – 10.2.130.24610.2.130.247
6310.2.130.248/3010.2.130.249 – 10.2.130.25010.2.130.251
6410.2.130.252/3010.2.130.253 – 10.2.130.25410.2.130.255
6510.2.131.0/3010.2.131.1 – 10.2.131.210.2.131.3
6610.2.131.4/3010.2.131.5 – 10.2.131.610.2.131.7
6710.2.131.8/3010.2.131.9 – 10.2.131.1010.2.131.11
6810.2.131.12/3010.2.131.13 – 10.2.131.1410.2.131.15
6910.2.131.16/3010.2.131.17 – 10.2.131.1810.2.131.19
7010.2.131.20/3010.2.131.21 – 10.2.131.2210.2.131.23
7110.2.131.24/3010.2.131.25 – 10.2.131.2610.2.131.27
7210.2.131.28/3010.2.131.29 – 10.2.131.3010.2.131.31
7310.2.131.32/3010.2.131.33 – 10.2.131.3410.2.131.35
7410.2.131.36/3010.2.131.37 – 10.2.131.3810.2.131.39
7510.2.131.40/3010.2.131.41 – 10.2.131.4210.2.131.43
7610.2.131.44/3010.2.131.45 – 10.2.131.4610.2.131.47
7710.2.131.48/3010.2.131.49 – 10.2.131.5010.2.131.51
7810.2.131.52/3010.2.131.53 – 10.2.131.5410.2.131.55
7910.2.131.56/3010.2.131.57 – 10.2.131.5810.2.131.59
8010.2.131.60/3010.2.131.61 – 10.2.131.6210.2.131.63
8110.2.131.64/3010.2.131.65 – 10.2.131.6610.2.131.67
8210.2.131.68/3010.2.131.69 – 10.2.131.7010.2.131.71
8310.2.131.72/3010.2.131.73 – 10.2.131.7410.2.131.75
8410.2.131.76/3010.2.131.77 – 10.2.131.7810.2.131.79
8510.2.131.80/3010.2.131.81 – 10.2.131.8210.2.131.83
8610.2.131.84/3010.2.131.85 – 10.2.131.8610.2.131.87
8710.2.131.88/3010.2.131.89 – 10.2.131.9010.2.131.91
8810.2.131.92/3010.2.131.93 – 10.2.131.9410.2.131.95
8910.2.131.96/3010.2.131.97 – 10.2.131.9810.2.131.99
9010.2.131.100/3010.2.131.101 – 10.2.131.10210.2.131.103
9110.2.131.104/3010.2.131.105 – 10.2.131.10610.2.131.107
9210.2.131.108/3010.2.131.109 – 10.2.131.11010.2.131.111
9310.2.131.112/3010.2.131.113 – 10.2.131.11410.2.131.115
9410.2.131.116/3010.2.131.117 – 10.2.131.11810.2.131.119
9510.2.131.120/3010.2.131.121 – 10.2.131.12210.2.131.123
9610.2.131.124/3010.2.131.125 – 10.2.131.12610.2.131.127
9710.2.131.128/3010.2.131.129 – 10.2.131.13010.2.131.131
9810.2.131.132/3010.2.131.133 – 10.2.131.13410.2.131.135
9910.2.131.136/3010.2.131.137 – 10.2.131.13810.2.131.139
10010.2.131.140/3010.2.131.141 – 10.2.131.14210.2.131.143
10110.2.131.144/3010.2.131.145 – 10.2.131.14610.2.131.147
10210.2.131.148/3010.2.131.149 – 10.2.131.15010.2.131.151
10310.2.131.152/3010.2.131.153 – 10.2.131.15410.2.131.155
10410.2.131.156/3010.2.131.157 – 10.2.131.15810.2.131.159
10510.2.131.160/3010.2.131.161 – 10.2.131.16210.2.131.163
10610.2.131.164/3010.2.131.165 – 10.2.131.16610.2.131.167
10710.2.131.168/3010.2.131.169 – 10.2.131.17010.2.131.171
10810.2.131.172/3010.2.131.173 – 10.2.131.17410.2.131.175
10910.2.131.176/3010.2.131.177 – 10.2.131.17810.2.131.179
11010.2.131.180/3010.2.131.181 – 10.2.131.18210.2.131.183
11110.2.131.184/3010.2.131.185 – 10.2.131.18610.2.131.187
11210.2.131.188/3010.2.131.189 – 10.2.131.19010.2.131.191
11310.2.131.192/3010.2.131.193 – 10.2.131.19410.2.131.195
11410.2.131.196/3010.2.131.197 – 10.2.131.19810.2.131.199
11510.2.131.200/3010.2.131.201 – 10.2.131.20210.2.131.203
11610.2.131.204/3010.2.131.205 – 10.2.131.20610.2.131.207
11710.2.131.208/3010.2.131.209 – 10.2.131.21010.2.131.211
11810.2.131.212/3010.2.131.213 – 10.2.131.21410.2.131.215
11910.2.131.216/3010.2.131.217 – 10.2.131.21810.2.131.219
12010.2.131.220/3010.2.131.221 – 10.2.131.22210.2.131.223
12110.2.131.224/3010.2.131.225 – 10.2.131.22610.2.131.227
12210.2.131.228/3010.2.131.229 – 10.2.131.23010.2.131.231
12310.2.131.232/3010.2.131.233 – 10.2.131.23410.2.131.235
12410.2.131.236/3010.2.131.237 – 10.2.131.23810.2.131.239
12510.2.131.240/3010.2.131.241 – 10.2.131.24210.2.131.243
12610.2.131.244/3010.2.131.245 – 10.2.131.24610.2.131.247
12710.2.131.248/3010.2.131.249 – 10.2.131.25010.2.131.251
12810.2.131.252/3010.2.131.253 – 10.2.131.25410.2.131.255
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 →