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)10.2.30.0/23
network10.2.30.0/23
broadcast10.2.31.255
first host10.2.30.1
last host10.2.31.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.2.30.0/23
address00001010.00000010.00011110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00000010.00011110.00000000
broadcast00001010.00000010.00011111.11111111
green = network part, grey = host part
hex0x0a021e00
decimal167910912
reverse dns0.30.2.10.in-addr.arpa
ipv4-mapped::ffff:a02:1e00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.2.30.0/3010.2.30.1 – 10.2.30.210.2.30.3
210.2.30.4/3010.2.30.5 – 10.2.30.610.2.30.7
310.2.30.8/3010.2.30.9 – 10.2.30.1010.2.30.11
410.2.30.12/3010.2.30.13 – 10.2.30.1410.2.30.15
510.2.30.16/3010.2.30.17 – 10.2.30.1810.2.30.19
610.2.30.20/3010.2.30.21 – 10.2.30.2210.2.30.23
710.2.30.24/3010.2.30.25 – 10.2.30.2610.2.30.27
810.2.30.28/3010.2.30.29 – 10.2.30.3010.2.30.31
910.2.30.32/3010.2.30.33 – 10.2.30.3410.2.30.35
1010.2.30.36/3010.2.30.37 – 10.2.30.3810.2.30.39
1110.2.30.40/3010.2.30.41 – 10.2.30.4210.2.30.43
1210.2.30.44/3010.2.30.45 – 10.2.30.4610.2.30.47
1310.2.30.48/3010.2.30.49 – 10.2.30.5010.2.30.51
1410.2.30.52/3010.2.30.53 – 10.2.30.5410.2.30.55
1510.2.30.56/3010.2.30.57 – 10.2.30.5810.2.30.59
1610.2.30.60/3010.2.30.61 – 10.2.30.6210.2.30.63
1710.2.30.64/3010.2.30.65 – 10.2.30.6610.2.30.67
1810.2.30.68/3010.2.30.69 – 10.2.30.7010.2.30.71
1910.2.30.72/3010.2.30.73 – 10.2.30.7410.2.30.75
2010.2.30.76/3010.2.30.77 – 10.2.30.7810.2.30.79
2110.2.30.80/3010.2.30.81 – 10.2.30.8210.2.30.83
2210.2.30.84/3010.2.30.85 – 10.2.30.8610.2.30.87
2310.2.30.88/3010.2.30.89 – 10.2.30.9010.2.30.91
2410.2.30.92/3010.2.30.93 – 10.2.30.9410.2.30.95
2510.2.30.96/3010.2.30.97 – 10.2.30.9810.2.30.99
2610.2.30.100/3010.2.30.101 – 10.2.30.10210.2.30.103
2710.2.30.104/3010.2.30.105 – 10.2.30.10610.2.30.107
2810.2.30.108/3010.2.30.109 – 10.2.30.11010.2.30.111
2910.2.30.112/3010.2.30.113 – 10.2.30.11410.2.30.115
3010.2.30.116/3010.2.30.117 – 10.2.30.11810.2.30.119
3110.2.30.120/3010.2.30.121 – 10.2.30.12210.2.30.123
3210.2.30.124/3010.2.30.125 – 10.2.30.12610.2.30.127
3310.2.30.128/3010.2.30.129 – 10.2.30.13010.2.30.131
3410.2.30.132/3010.2.30.133 – 10.2.30.13410.2.30.135
3510.2.30.136/3010.2.30.137 – 10.2.30.13810.2.30.139
3610.2.30.140/3010.2.30.141 – 10.2.30.14210.2.30.143
3710.2.30.144/3010.2.30.145 – 10.2.30.14610.2.30.147
3810.2.30.148/3010.2.30.149 – 10.2.30.15010.2.30.151
3910.2.30.152/3010.2.30.153 – 10.2.30.15410.2.30.155
4010.2.30.156/3010.2.30.157 – 10.2.30.15810.2.30.159
4110.2.30.160/3010.2.30.161 – 10.2.30.16210.2.30.163
4210.2.30.164/3010.2.30.165 – 10.2.30.16610.2.30.167
4310.2.30.168/3010.2.30.169 – 10.2.30.17010.2.30.171
4410.2.30.172/3010.2.30.173 – 10.2.30.17410.2.30.175
4510.2.30.176/3010.2.30.177 – 10.2.30.17810.2.30.179
4610.2.30.180/3010.2.30.181 – 10.2.30.18210.2.30.183
4710.2.30.184/3010.2.30.185 – 10.2.30.18610.2.30.187
4810.2.30.188/3010.2.30.189 – 10.2.30.19010.2.30.191
4910.2.30.192/3010.2.30.193 – 10.2.30.19410.2.30.195
5010.2.30.196/3010.2.30.197 – 10.2.30.19810.2.30.199
5110.2.30.200/3010.2.30.201 – 10.2.30.20210.2.30.203
5210.2.30.204/3010.2.30.205 – 10.2.30.20610.2.30.207
5310.2.30.208/3010.2.30.209 – 10.2.30.21010.2.30.211
5410.2.30.212/3010.2.30.213 – 10.2.30.21410.2.30.215
5510.2.30.216/3010.2.30.217 – 10.2.30.21810.2.30.219
5610.2.30.220/3010.2.30.221 – 10.2.30.22210.2.30.223
5710.2.30.224/3010.2.30.225 – 10.2.30.22610.2.30.227
5810.2.30.228/3010.2.30.229 – 10.2.30.23010.2.30.231
5910.2.30.232/3010.2.30.233 – 10.2.30.23410.2.30.235
6010.2.30.236/3010.2.30.237 – 10.2.30.23810.2.30.239
6110.2.30.240/3010.2.30.241 – 10.2.30.24210.2.30.243
6210.2.30.244/3010.2.30.245 – 10.2.30.24610.2.30.247
6310.2.30.248/3010.2.30.249 – 10.2.30.25010.2.30.251
6410.2.30.252/3010.2.30.253 – 10.2.30.25410.2.30.255
6510.2.31.0/3010.2.31.1 – 10.2.31.210.2.31.3
6610.2.31.4/3010.2.31.5 – 10.2.31.610.2.31.7
6710.2.31.8/3010.2.31.9 – 10.2.31.1010.2.31.11
6810.2.31.12/3010.2.31.13 – 10.2.31.1410.2.31.15
6910.2.31.16/3010.2.31.17 – 10.2.31.1810.2.31.19
7010.2.31.20/3010.2.31.21 – 10.2.31.2210.2.31.23
7110.2.31.24/3010.2.31.25 – 10.2.31.2610.2.31.27
7210.2.31.28/3010.2.31.29 – 10.2.31.3010.2.31.31
7310.2.31.32/3010.2.31.33 – 10.2.31.3410.2.31.35
7410.2.31.36/3010.2.31.37 – 10.2.31.3810.2.31.39
7510.2.31.40/3010.2.31.41 – 10.2.31.4210.2.31.43
7610.2.31.44/3010.2.31.45 – 10.2.31.4610.2.31.47
7710.2.31.48/3010.2.31.49 – 10.2.31.5010.2.31.51
7810.2.31.52/3010.2.31.53 – 10.2.31.5410.2.31.55
7910.2.31.56/3010.2.31.57 – 10.2.31.5810.2.31.59
8010.2.31.60/3010.2.31.61 – 10.2.31.6210.2.31.63
8110.2.31.64/3010.2.31.65 – 10.2.31.6610.2.31.67
8210.2.31.68/3010.2.31.69 – 10.2.31.7010.2.31.71
8310.2.31.72/3010.2.31.73 – 10.2.31.7410.2.31.75
8410.2.31.76/3010.2.31.77 – 10.2.31.7810.2.31.79
8510.2.31.80/3010.2.31.81 – 10.2.31.8210.2.31.83
8610.2.31.84/3010.2.31.85 – 10.2.31.8610.2.31.87
8710.2.31.88/3010.2.31.89 – 10.2.31.9010.2.31.91
8810.2.31.92/3010.2.31.93 – 10.2.31.9410.2.31.95
8910.2.31.96/3010.2.31.97 – 10.2.31.9810.2.31.99
9010.2.31.100/3010.2.31.101 – 10.2.31.10210.2.31.103
9110.2.31.104/3010.2.31.105 – 10.2.31.10610.2.31.107
9210.2.31.108/3010.2.31.109 – 10.2.31.11010.2.31.111
9310.2.31.112/3010.2.31.113 – 10.2.31.11410.2.31.115
9410.2.31.116/3010.2.31.117 – 10.2.31.11810.2.31.119
9510.2.31.120/3010.2.31.121 – 10.2.31.12210.2.31.123
9610.2.31.124/3010.2.31.125 – 10.2.31.12610.2.31.127
9710.2.31.128/3010.2.31.129 – 10.2.31.13010.2.31.131
9810.2.31.132/3010.2.31.133 – 10.2.31.13410.2.31.135
9910.2.31.136/3010.2.31.137 – 10.2.31.13810.2.31.139
10010.2.31.140/3010.2.31.141 – 10.2.31.14210.2.31.143
10110.2.31.144/3010.2.31.145 – 10.2.31.14610.2.31.147
10210.2.31.148/3010.2.31.149 – 10.2.31.15010.2.31.151
10310.2.31.152/3010.2.31.153 – 10.2.31.15410.2.31.155
10410.2.31.156/3010.2.31.157 – 10.2.31.15810.2.31.159
10510.2.31.160/3010.2.31.161 – 10.2.31.16210.2.31.163
10610.2.31.164/3010.2.31.165 – 10.2.31.16610.2.31.167
10710.2.31.168/3010.2.31.169 – 10.2.31.17010.2.31.171
10810.2.31.172/3010.2.31.173 – 10.2.31.17410.2.31.175
10910.2.31.176/3010.2.31.177 – 10.2.31.17810.2.31.179
11010.2.31.180/3010.2.31.181 – 10.2.31.18210.2.31.183
11110.2.31.184/3010.2.31.185 – 10.2.31.18610.2.31.187
11210.2.31.188/3010.2.31.189 – 10.2.31.19010.2.31.191
11310.2.31.192/3010.2.31.193 – 10.2.31.19410.2.31.195
11410.2.31.196/3010.2.31.197 – 10.2.31.19810.2.31.199
11510.2.31.200/3010.2.31.201 – 10.2.31.20210.2.31.203
11610.2.31.204/3010.2.31.205 – 10.2.31.20610.2.31.207
11710.2.31.208/3010.2.31.209 – 10.2.31.21010.2.31.211
11810.2.31.212/3010.2.31.213 – 10.2.31.21410.2.31.215
11910.2.31.216/3010.2.31.217 – 10.2.31.21810.2.31.219
12010.2.31.220/3010.2.31.221 – 10.2.31.22210.2.31.223
12110.2.31.224/3010.2.31.225 – 10.2.31.22610.2.31.227
12210.2.31.228/3010.2.31.229 – 10.2.31.23010.2.31.231
12310.2.31.232/3010.2.31.233 – 10.2.31.23410.2.31.235
12410.2.31.236/3010.2.31.237 – 10.2.31.23810.2.31.239
12510.2.31.240/3010.2.31.241 – 10.2.31.24210.2.31.243
12610.2.31.244/3010.2.31.245 – 10.2.31.24610.2.31.247
12710.2.31.248/3010.2.31.249 – 10.2.31.25010.2.31.251
12810.2.31.252/3010.2.31.253 – 10.2.31.25410.2.31.255
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 →