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)10.131.24.0/23
network10.131.24.0/23
broadcast10.131.25.255
first host10.131.24.1
last host10.131.25.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.131.24.0/23
address00001010.10000011.00011000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.10000011.00011000.00000000
broadcast00001010.10000011.00011001.11111111
green = network part, grey = host part
hex0x0a831800
decimal176363520
reverse dns0.24.131.10.in-addr.arpa
ipv4-mapped::ffff:a83:1800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.131.24.0/3010.131.24.1 – 10.131.24.210.131.24.3
210.131.24.4/3010.131.24.5 – 10.131.24.610.131.24.7
310.131.24.8/3010.131.24.9 – 10.131.24.1010.131.24.11
410.131.24.12/3010.131.24.13 – 10.131.24.1410.131.24.15
510.131.24.16/3010.131.24.17 – 10.131.24.1810.131.24.19
610.131.24.20/3010.131.24.21 – 10.131.24.2210.131.24.23
710.131.24.24/3010.131.24.25 – 10.131.24.2610.131.24.27
810.131.24.28/3010.131.24.29 – 10.131.24.3010.131.24.31
910.131.24.32/3010.131.24.33 – 10.131.24.3410.131.24.35
1010.131.24.36/3010.131.24.37 – 10.131.24.3810.131.24.39
1110.131.24.40/3010.131.24.41 – 10.131.24.4210.131.24.43
1210.131.24.44/3010.131.24.45 – 10.131.24.4610.131.24.47
1310.131.24.48/3010.131.24.49 – 10.131.24.5010.131.24.51
1410.131.24.52/3010.131.24.53 – 10.131.24.5410.131.24.55
1510.131.24.56/3010.131.24.57 – 10.131.24.5810.131.24.59
1610.131.24.60/3010.131.24.61 – 10.131.24.6210.131.24.63
1710.131.24.64/3010.131.24.65 – 10.131.24.6610.131.24.67
1810.131.24.68/3010.131.24.69 – 10.131.24.7010.131.24.71
1910.131.24.72/3010.131.24.73 – 10.131.24.7410.131.24.75
2010.131.24.76/3010.131.24.77 – 10.131.24.7810.131.24.79
2110.131.24.80/3010.131.24.81 – 10.131.24.8210.131.24.83
2210.131.24.84/3010.131.24.85 – 10.131.24.8610.131.24.87
2310.131.24.88/3010.131.24.89 – 10.131.24.9010.131.24.91
2410.131.24.92/3010.131.24.93 – 10.131.24.9410.131.24.95
2510.131.24.96/3010.131.24.97 – 10.131.24.9810.131.24.99
2610.131.24.100/3010.131.24.101 – 10.131.24.10210.131.24.103
2710.131.24.104/3010.131.24.105 – 10.131.24.10610.131.24.107
2810.131.24.108/3010.131.24.109 – 10.131.24.11010.131.24.111
2910.131.24.112/3010.131.24.113 – 10.131.24.11410.131.24.115
3010.131.24.116/3010.131.24.117 – 10.131.24.11810.131.24.119
3110.131.24.120/3010.131.24.121 – 10.131.24.12210.131.24.123
3210.131.24.124/3010.131.24.125 – 10.131.24.12610.131.24.127
3310.131.24.128/3010.131.24.129 – 10.131.24.13010.131.24.131
3410.131.24.132/3010.131.24.133 – 10.131.24.13410.131.24.135
3510.131.24.136/3010.131.24.137 – 10.131.24.13810.131.24.139
3610.131.24.140/3010.131.24.141 – 10.131.24.14210.131.24.143
3710.131.24.144/3010.131.24.145 – 10.131.24.14610.131.24.147
3810.131.24.148/3010.131.24.149 – 10.131.24.15010.131.24.151
3910.131.24.152/3010.131.24.153 – 10.131.24.15410.131.24.155
4010.131.24.156/3010.131.24.157 – 10.131.24.15810.131.24.159
4110.131.24.160/3010.131.24.161 – 10.131.24.16210.131.24.163
4210.131.24.164/3010.131.24.165 – 10.131.24.16610.131.24.167
4310.131.24.168/3010.131.24.169 – 10.131.24.17010.131.24.171
4410.131.24.172/3010.131.24.173 – 10.131.24.17410.131.24.175
4510.131.24.176/3010.131.24.177 – 10.131.24.17810.131.24.179
4610.131.24.180/3010.131.24.181 – 10.131.24.18210.131.24.183
4710.131.24.184/3010.131.24.185 – 10.131.24.18610.131.24.187
4810.131.24.188/3010.131.24.189 – 10.131.24.19010.131.24.191
4910.131.24.192/3010.131.24.193 – 10.131.24.19410.131.24.195
5010.131.24.196/3010.131.24.197 – 10.131.24.19810.131.24.199
5110.131.24.200/3010.131.24.201 – 10.131.24.20210.131.24.203
5210.131.24.204/3010.131.24.205 – 10.131.24.20610.131.24.207
5310.131.24.208/3010.131.24.209 – 10.131.24.21010.131.24.211
5410.131.24.212/3010.131.24.213 – 10.131.24.21410.131.24.215
5510.131.24.216/3010.131.24.217 – 10.131.24.21810.131.24.219
5610.131.24.220/3010.131.24.221 – 10.131.24.22210.131.24.223
5710.131.24.224/3010.131.24.225 – 10.131.24.22610.131.24.227
5810.131.24.228/3010.131.24.229 – 10.131.24.23010.131.24.231
5910.131.24.232/3010.131.24.233 – 10.131.24.23410.131.24.235
6010.131.24.236/3010.131.24.237 – 10.131.24.23810.131.24.239
6110.131.24.240/3010.131.24.241 – 10.131.24.24210.131.24.243
6210.131.24.244/3010.131.24.245 – 10.131.24.24610.131.24.247
6310.131.24.248/3010.131.24.249 – 10.131.24.25010.131.24.251
6410.131.24.252/3010.131.24.253 – 10.131.24.25410.131.24.255
6510.131.25.0/3010.131.25.1 – 10.131.25.210.131.25.3
6610.131.25.4/3010.131.25.5 – 10.131.25.610.131.25.7
6710.131.25.8/3010.131.25.9 – 10.131.25.1010.131.25.11
6810.131.25.12/3010.131.25.13 – 10.131.25.1410.131.25.15
6910.131.25.16/3010.131.25.17 – 10.131.25.1810.131.25.19
7010.131.25.20/3010.131.25.21 – 10.131.25.2210.131.25.23
7110.131.25.24/3010.131.25.25 – 10.131.25.2610.131.25.27
7210.131.25.28/3010.131.25.29 – 10.131.25.3010.131.25.31
7310.131.25.32/3010.131.25.33 – 10.131.25.3410.131.25.35
7410.131.25.36/3010.131.25.37 – 10.131.25.3810.131.25.39
7510.131.25.40/3010.131.25.41 – 10.131.25.4210.131.25.43
7610.131.25.44/3010.131.25.45 – 10.131.25.4610.131.25.47
7710.131.25.48/3010.131.25.49 – 10.131.25.5010.131.25.51
7810.131.25.52/3010.131.25.53 – 10.131.25.5410.131.25.55
7910.131.25.56/3010.131.25.57 – 10.131.25.5810.131.25.59
8010.131.25.60/3010.131.25.61 – 10.131.25.6210.131.25.63
8110.131.25.64/3010.131.25.65 – 10.131.25.6610.131.25.67
8210.131.25.68/3010.131.25.69 – 10.131.25.7010.131.25.71
8310.131.25.72/3010.131.25.73 – 10.131.25.7410.131.25.75
8410.131.25.76/3010.131.25.77 – 10.131.25.7810.131.25.79
8510.131.25.80/3010.131.25.81 – 10.131.25.8210.131.25.83
8610.131.25.84/3010.131.25.85 – 10.131.25.8610.131.25.87
8710.131.25.88/3010.131.25.89 – 10.131.25.9010.131.25.91
8810.131.25.92/3010.131.25.93 – 10.131.25.9410.131.25.95
8910.131.25.96/3010.131.25.97 – 10.131.25.9810.131.25.99
9010.131.25.100/3010.131.25.101 – 10.131.25.10210.131.25.103
9110.131.25.104/3010.131.25.105 – 10.131.25.10610.131.25.107
9210.131.25.108/3010.131.25.109 – 10.131.25.11010.131.25.111
9310.131.25.112/3010.131.25.113 – 10.131.25.11410.131.25.115
9410.131.25.116/3010.131.25.117 – 10.131.25.11810.131.25.119
9510.131.25.120/3010.131.25.121 – 10.131.25.12210.131.25.123
9610.131.25.124/3010.131.25.125 – 10.131.25.12610.131.25.127
9710.131.25.128/3010.131.25.129 – 10.131.25.13010.131.25.131
9810.131.25.132/3010.131.25.133 – 10.131.25.13410.131.25.135
9910.131.25.136/3010.131.25.137 – 10.131.25.13810.131.25.139
10010.131.25.140/3010.131.25.141 – 10.131.25.14210.131.25.143
10110.131.25.144/3010.131.25.145 – 10.131.25.14610.131.25.147
10210.131.25.148/3010.131.25.149 – 10.131.25.15010.131.25.151
10310.131.25.152/3010.131.25.153 – 10.131.25.15410.131.25.155
10410.131.25.156/3010.131.25.157 – 10.131.25.15810.131.25.159
10510.131.25.160/3010.131.25.161 – 10.131.25.16210.131.25.163
10610.131.25.164/3010.131.25.165 – 10.131.25.16610.131.25.167
10710.131.25.168/3010.131.25.169 – 10.131.25.17010.131.25.171
10810.131.25.172/3010.131.25.173 – 10.131.25.17410.131.25.175
10910.131.25.176/3010.131.25.177 – 10.131.25.17810.131.25.179
11010.131.25.180/3010.131.25.181 – 10.131.25.18210.131.25.183
11110.131.25.184/3010.131.25.185 – 10.131.25.18610.131.25.187
11210.131.25.188/3010.131.25.189 – 10.131.25.19010.131.25.191
11310.131.25.192/3010.131.25.193 – 10.131.25.19410.131.25.195
11410.131.25.196/3010.131.25.197 – 10.131.25.19810.131.25.199
11510.131.25.200/3010.131.25.201 – 10.131.25.20210.131.25.203
11610.131.25.204/3010.131.25.205 – 10.131.25.20610.131.25.207
11710.131.25.208/3010.131.25.209 – 10.131.25.21010.131.25.211
11810.131.25.212/3010.131.25.213 – 10.131.25.21410.131.25.215
11910.131.25.216/3010.131.25.217 – 10.131.25.21810.131.25.219
12010.131.25.220/3010.131.25.221 – 10.131.25.22210.131.25.223
12110.131.25.224/3010.131.25.225 – 10.131.25.22610.131.25.227
12210.131.25.228/3010.131.25.229 – 10.131.25.23010.131.25.231
12310.131.25.232/3010.131.25.233 – 10.131.25.23410.131.25.235
12410.131.25.236/3010.131.25.237 – 10.131.25.23810.131.25.239
12510.131.25.240/3010.131.25.241 – 10.131.25.24210.131.25.243
12610.131.25.244/3010.131.25.245 – 10.131.25.24610.131.25.247
12710.131.25.248/3010.131.25.249 – 10.131.25.25010.131.25.251
12810.131.25.252/3010.131.25.253 – 10.131.25.25410.131.25.255
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 →