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)10.7.8.0/23
network10.7.8.0/23
broadcast10.7.9.255
first host10.7.8.1
last host10.7.9.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.7.8.0/23
address00001010.00000111.00001000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000111.00001000.00000000
broadcast00001010.00000111.00001001.11111111
green = network part, grey = host part
hex0x0a070800
decimal168232960
reverse dns0.8.7.10.in-addr.arpa
ipv4-mapped::ffff:a07:800

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.7.8.0/3010.7.8.1 – 10.7.8.210.7.8.3
210.7.8.4/3010.7.8.5 – 10.7.8.610.7.8.7
310.7.8.8/3010.7.8.9 – 10.7.8.1010.7.8.11
410.7.8.12/3010.7.8.13 – 10.7.8.1410.7.8.15
510.7.8.16/3010.7.8.17 – 10.7.8.1810.7.8.19
610.7.8.20/3010.7.8.21 – 10.7.8.2210.7.8.23
710.7.8.24/3010.7.8.25 – 10.7.8.2610.7.8.27
810.7.8.28/3010.7.8.29 – 10.7.8.3010.7.8.31
910.7.8.32/3010.7.8.33 – 10.7.8.3410.7.8.35
1010.7.8.36/3010.7.8.37 – 10.7.8.3810.7.8.39
1110.7.8.40/3010.7.8.41 – 10.7.8.4210.7.8.43
1210.7.8.44/3010.7.8.45 – 10.7.8.4610.7.8.47
1310.7.8.48/3010.7.8.49 – 10.7.8.5010.7.8.51
1410.7.8.52/3010.7.8.53 – 10.7.8.5410.7.8.55
1510.7.8.56/3010.7.8.57 – 10.7.8.5810.7.8.59
1610.7.8.60/3010.7.8.61 – 10.7.8.6210.7.8.63
1710.7.8.64/3010.7.8.65 – 10.7.8.6610.7.8.67
1810.7.8.68/3010.7.8.69 – 10.7.8.7010.7.8.71
1910.7.8.72/3010.7.8.73 – 10.7.8.7410.7.8.75
2010.7.8.76/3010.7.8.77 – 10.7.8.7810.7.8.79
2110.7.8.80/3010.7.8.81 – 10.7.8.8210.7.8.83
2210.7.8.84/3010.7.8.85 – 10.7.8.8610.7.8.87
2310.7.8.88/3010.7.8.89 – 10.7.8.9010.7.8.91
2410.7.8.92/3010.7.8.93 – 10.7.8.9410.7.8.95
2510.7.8.96/3010.7.8.97 – 10.7.8.9810.7.8.99
2610.7.8.100/3010.7.8.101 – 10.7.8.10210.7.8.103
2710.7.8.104/3010.7.8.105 – 10.7.8.10610.7.8.107
2810.7.8.108/3010.7.8.109 – 10.7.8.11010.7.8.111
2910.7.8.112/3010.7.8.113 – 10.7.8.11410.7.8.115
3010.7.8.116/3010.7.8.117 – 10.7.8.11810.7.8.119
3110.7.8.120/3010.7.8.121 – 10.7.8.12210.7.8.123
3210.7.8.124/3010.7.8.125 – 10.7.8.12610.7.8.127
3310.7.8.128/3010.7.8.129 – 10.7.8.13010.7.8.131
3410.7.8.132/3010.7.8.133 – 10.7.8.13410.7.8.135
3510.7.8.136/3010.7.8.137 – 10.7.8.13810.7.8.139
3610.7.8.140/3010.7.8.141 – 10.7.8.14210.7.8.143
3710.7.8.144/3010.7.8.145 – 10.7.8.14610.7.8.147
3810.7.8.148/3010.7.8.149 – 10.7.8.15010.7.8.151
3910.7.8.152/3010.7.8.153 – 10.7.8.15410.7.8.155
4010.7.8.156/3010.7.8.157 – 10.7.8.15810.7.8.159
4110.7.8.160/3010.7.8.161 – 10.7.8.16210.7.8.163
4210.7.8.164/3010.7.8.165 – 10.7.8.16610.7.8.167
4310.7.8.168/3010.7.8.169 – 10.7.8.17010.7.8.171
4410.7.8.172/3010.7.8.173 – 10.7.8.17410.7.8.175
4510.7.8.176/3010.7.8.177 – 10.7.8.17810.7.8.179
4610.7.8.180/3010.7.8.181 – 10.7.8.18210.7.8.183
4710.7.8.184/3010.7.8.185 – 10.7.8.18610.7.8.187
4810.7.8.188/3010.7.8.189 – 10.7.8.19010.7.8.191
4910.7.8.192/3010.7.8.193 – 10.7.8.19410.7.8.195
5010.7.8.196/3010.7.8.197 – 10.7.8.19810.7.8.199
5110.7.8.200/3010.7.8.201 – 10.7.8.20210.7.8.203
5210.7.8.204/3010.7.8.205 – 10.7.8.20610.7.8.207
5310.7.8.208/3010.7.8.209 – 10.7.8.21010.7.8.211
5410.7.8.212/3010.7.8.213 – 10.7.8.21410.7.8.215
5510.7.8.216/3010.7.8.217 – 10.7.8.21810.7.8.219
5610.7.8.220/3010.7.8.221 – 10.7.8.22210.7.8.223
5710.7.8.224/3010.7.8.225 – 10.7.8.22610.7.8.227
5810.7.8.228/3010.7.8.229 – 10.7.8.23010.7.8.231
5910.7.8.232/3010.7.8.233 – 10.7.8.23410.7.8.235
6010.7.8.236/3010.7.8.237 – 10.7.8.23810.7.8.239
6110.7.8.240/3010.7.8.241 – 10.7.8.24210.7.8.243
6210.7.8.244/3010.7.8.245 – 10.7.8.24610.7.8.247
6310.7.8.248/3010.7.8.249 – 10.7.8.25010.7.8.251
6410.7.8.252/3010.7.8.253 – 10.7.8.25410.7.8.255
6510.7.9.0/3010.7.9.1 – 10.7.9.210.7.9.3
6610.7.9.4/3010.7.9.5 – 10.7.9.610.7.9.7
6710.7.9.8/3010.7.9.9 – 10.7.9.1010.7.9.11
6810.7.9.12/3010.7.9.13 – 10.7.9.1410.7.9.15
6910.7.9.16/3010.7.9.17 – 10.7.9.1810.7.9.19
7010.7.9.20/3010.7.9.21 – 10.7.9.2210.7.9.23
7110.7.9.24/3010.7.9.25 – 10.7.9.2610.7.9.27
7210.7.9.28/3010.7.9.29 – 10.7.9.3010.7.9.31
7310.7.9.32/3010.7.9.33 – 10.7.9.3410.7.9.35
7410.7.9.36/3010.7.9.37 – 10.7.9.3810.7.9.39
7510.7.9.40/3010.7.9.41 – 10.7.9.4210.7.9.43
7610.7.9.44/3010.7.9.45 – 10.7.9.4610.7.9.47
7710.7.9.48/3010.7.9.49 – 10.7.9.5010.7.9.51
7810.7.9.52/3010.7.9.53 – 10.7.9.5410.7.9.55
7910.7.9.56/3010.7.9.57 – 10.7.9.5810.7.9.59
8010.7.9.60/3010.7.9.61 – 10.7.9.6210.7.9.63
8110.7.9.64/3010.7.9.65 – 10.7.9.6610.7.9.67
8210.7.9.68/3010.7.9.69 – 10.7.9.7010.7.9.71
8310.7.9.72/3010.7.9.73 – 10.7.9.7410.7.9.75
8410.7.9.76/3010.7.9.77 – 10.7.9.7810.7.9.79
8510.7.9.80/3010.7.9.81 – 10.7.9.8210.7.9.83
8610.7.9.84/3010.7.9.85 – 10.7.9.8610.7.9.87
8710.7.9.88/3010.7.9.89 – 10.7.9.9010.7.9.91
8810.7.9.92/3010.7.9.93 – 10.7.9.9410.7.9.95
8910.7.9.96/3010.7.9.97 – 10.7.9.9810.7.9.99
9010.7.9.100/3010.7.9.101 – 10.7.9.10210.7.9.103
9110.7.9.104/3010.7.9.105 – 10.7.9.10610.7.9.107
9210.7.9.108/3010.7.9.109 – 10.7.9.11010.7.9.111
9310.7.9.112/3010.7.9.113 – 10.7.9.11410.7.9.115
9410.7.9.116/3010.7.9.117 – 10.7.9.11810.7.9.119
9510.7.9.120/3010.7.9.121 – 10.7.9.12210.7.9.123
9610.7.9.124/3010.7.9.125 – 10.7.9.12610.7.9.127
9710.7.9.128/3010.7.9.129 – 10.7.9.13010.7.9.131
9810.7.9.132/3010.7.9.133 – 10.7.9.13410.7.9.135
9910.7.9.136/3010.7.9.137 – 10.7.9.13810.7.9.139
10010.7.9.140/3010.7.9.141 – 10.7.9.14210.7.9.143
10110.7.9.144/3010.7.9.145 – 10.7.9.14610.7.9.147
10210.7.9.148/3010.7.9.149 – 10.7.9.15010.7.9.151
10310.7.9.152/3010.7.9.153 – 10.7.9.15410.7.9.155
10410.7.9.156/3010.7.9.157 – 10.7.9.15810.7.9.159
10510.7.9.160/3010.7.9.161 – 10.7.9.16210.7.9.163
10610.7.9.164/3010.7.9.165 – 10.7.9.16610.7.9.167
10710.7.9.168/3010.7.9.169 – 10.7.9.17010.7.9.171
10810.7.9.172/3010.7.9.173 – 10.7.9.17410.7.9.175
10910.7.9.176/3010.7.9.177 – 10.7.9.17810.7.9.179
11010.7.9.180/3010.7.9.181 – 10.7.9.18210.7.9.183
11110.7.9.184/3010.7.9.185 – 10.7.9.18610.7.9.187
11210.7.9.188/3010.7.9.189 – 10.7.9.19010.7.9.191
11310.7.9.192/3010.7.9.193 – 10.7.9.19410.7.9.195
11410.7.9.196/3010.7.9.197 – 10.7.9.19810.7.9.199
11510.7.9.200/3010.7.9.201 – 10.7.9.20210.7.9.203
11610.7.9.204/3010.7.9.205 – 10.7.9.20610.7.9.207
11710.7.9.208/3010.7.9.209 – 10.7.9.21010.7.9.211
11810.7.9.212/3010.7.9.213 – 10.7.9.21410.7.9.215
11910.7.9.216/3010.7.9.217 – 10.7.9.21810.7.9.219
12010.7.9.220/3010.7.9.221 – 10.7.9.22210.7.9.223
12110.7.9.224/3010.7.9.225 – 10.7.9.22610.7.9.227
12210.7.9.228/3010.7.9.229 – 10.7.9.23010.7.9.231
12310.7.9.232/3010.7.9.233 – 10.7.9.23410.7.9.235
12410.7.9.236/3010.7.9.237 – 10.7.9.23810.7.9.239
12510.7.9.240/3010.7.9.241 – 10.7.9.24210.7.9.243
12610.7.9.244/3010.7.9.245 – 10.7.9.24610.7.9.247
12710.7.9.248/3010.7.9.249 – 10.7.9.25010.7.9.251
12810.7.9.252/3010.7.9.253 – 10.7.9.25410.7.9.255
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 →