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)10.89.18.0/23
network10.89.18.0/23
broadcast10.89.19.255
first host10.89.18.1
last host10.89.19.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.89.18.0/23
address00001010.01011001.00010010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01011001.00010010.00000000
broadcast00001010.01011001.00010011.11111111
green = network part, grey = host part
hex0x0a591200
decimal173609472
reverse dns0.18.89.10.in-addr.arpa
ipv4-mapped::ffff:a59:1200

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.89.18.0/3010.89.18.1 – 10.89.18.210.89.18.3
210.89.18.4/3010.89.18.5 – 10.89.18.610.89.18.7
310.89.18.8/3010.89.18.9 – 10.89.18.1010.89.18.11
410.89.18.12/3010.89.18.13 – 10.89.18.1410.89.18.15
510.89.18.16/3010.89.18.17 – 10.89.18.1810.89.18.19
610.89.18.20/3010.89.18.21 – 10.89.18.2210.89.18.23
710.89.18.24/3010.89.18.25 – 10.89.18.2610.89.18.27
810.89.18.28/3010.89.18.29 – 10.89.18.3010.89.18.31
910.89.18.32/3010.89.18.33 – 10.89.18.3410.89.18.35
1010.89.18.36/3010.89.18.37 – 10.89.18.3810.89.18.39
1110.89.18.40/3010.89.18.41 – 10.89.18.4210.89.18.43
1210.89.18.44/3010.89.18.45 – 10.89.18.4610.89.18.47
1310.89.18.48/3010.89.18.49 – 10.89.18.5010.89.18.51
1410.89.18.52/3010.89.18.53 – 10.89.18.5410.89.18.55
1510.89.18.56/3010.89.18.57 – 10.89.18.5810.89.18.59
1610.89.18.60/3010.89.18.61 – 10.89.18.6210.89.18.63
1710.89.18.64/3010.89.18.65 – 10.89.18.6610.89.18.67
1810.89.18.68/3010.89.18.69 – 10.89.18.7010.89.18.71
1910.89.18.72/3010.89.18.73 – 10.89.18.7410.89.18.75
2010.89.18.76/3010.89.18.77 – 10.89.18.7810.89.18.79
2110.89.18.80/3010.89.18.81 – 10.89.18.8210.89.18.83
2210.89.18.84/3010.89.18.85 – 10.89.18.8610.89.18.87
2310.89.18.88/3010.89.18.89 – 10.89.18.9010.89.18.91
2410.89.18.92/3010.89.18.93 – 10.89.18.9410.89.18.95
2510.89.18.96/3010.89.18.97 – 10.89.18.9810.89.18.99
2610.89.18.100/3010.89.18.101 – 10.89.18.10210.89.18.103
2710.89.18.104/3010.89.18.105 – 10.89.18.10610.89.18.107
2810.89.18.108/3010.89.18.109 – 10.89.18.11010.89.18.111
2910.89.18.112/3010.89.18.113 – 10.89.18.11410.89.18.115
3010.89.18.116/3010.89.18.117 – 10.89.18.11810.89.18.119
3110.89.18.120/3010.89.18.121 – 10.89.18.12210.89.18.123
3210.89.18.124/3010.89.18.125 – 10.89.18.12610.89.18.127
3310.89.18.128/3010.89.18.129 – 10.89.18.13010.89.18.131
3410.89.18.132/3010.89.18.133 – 10.89.18.13410.89.18.135
3510.89.18.136/3010.89.18.137 – 10.89.18.13810.89.18.139
3610.89.18.140/3010.89.18.141 – 10.89.18.14210.89.18.143
3710.89.18.144/3010.89.18.145 – 10.89.18.14610.89.18.147
3810.89.18.148/3010.89.18.149 – 10.89.18.15010.89.18.151
3910.89.18.152/3010.89.18.153 – 10.89.18.15410.89.18.155
4010.89.18.156/3010.89.18.157 – 10.89.18.15810.89.18.159
4110.89.18.160/3010.89.18.161 – 10.89.18.16210.89.18.163
4210.89.18.164/3010.89.18.165 – 10.89.18.16610.89.18.167
4310.89.18.168/3010.89.18.169 – 10.89.18.17010.89.18.171
4410.89.18.172/3010.89.18.173 – 10.89.18.17410.89.18.175
4510.89.18.176/3010.89.18.177 – 10.89.18.17810.89.18.179
4610.89.18.180/3010.89.18.181 – 10.89.18.18210.89.18.183
4710.89.18.184/3010.89.18.185 – 10.89.18.18610.89.18.187
4810.89.18.188/3010.89.18.189 – 10.89.18.19010.89.18.191
4910.89.18.192/3010.89.18.193 – 10.89.18.19410.89.18.195
5010.89.18.196/3010.89.18.197 – 10.89.18.19810.89.18.199
5110.89.18.200/3010.89.18.201 – 10.89.18.20210.89.18.203
5210.89.18.204/3010.89.18.205 – 10.89.18.20610.89.18.207
5310.89.18.208/3010.89.18.209 – 10.89.18.21010.89.18.211
5410.89.18.212/3010.89.18.213 – 10.89.18.21410.89.18.215
5510.89.18.216/3010.89.18.217 – 10.89.18.21810.89.18.219
5610.89.18.220/3010.89.18.221 – 10.89.18.22210.89.18.223
5710.89.18.224/3010.89.18.225 – 10.89.18.22610.89.18.227
5810.89.18.228/3010.89.18.229 – 10.89.18.23010.89.18.231
5910.89.18.232/3010.89.18.233 – 10.89.18.23410.89.18.235
6010.89.18.236/3010.89.18.237 – 10.89.18.23810.89.18.239
6110.89.18.240/3010.89.18.241 – 10.89.18.24210.89.18.243
6210.89.18.244/3010.89.18.245 – 10.89.18.24610.89.18.247
6310.89.18.248/3010.89.18.249 – 10.89.18.25010.89.18.251
6410.89.18.252/3010.89.18.253 – 10.89.18.25410.89.18.255
6510.89.19.0/3010.89.19.1 – 10.89.19.210.89.19.3
6610.89.19.4/3010.89.19.5 – 10.89.19.610.89.19.7
6710.89.19.8/3010.89.19.9 – 10.89.19.1010.89.19.11
6810.89.19.12/3010.89.19.13 – 10.89.19.1410.89.19.15
6910.89.19.16/3010.89.19.17 – 10.89.19.1810.89.19.19
7010.89.19.20/3010.89.19.21 – 10.89.19.2210.89.19.23
7110.89.19.24/3010.89.19.25 – 10.89.19.2610.89.19.27
7210.89.19.28/3010.89.19.29 – 10.89.19.3010.89.19.31
7310.89.19.32/3010.89.19.33 – 10.89.19.3410.89.19.35
7410.89.19.36/3010.89.19.37 – 10.89.19.3810.89.19.39
7510.89.19.40/3010.89.19.41 – 10.89.19.4210.89.19.43
7610.89.19.44/3010.89.19.45 – 10.89.19.4610.89.19.47
7710.89.19.48/3010.89.19.49 – 10.89.19.5010.89.19.51
7810.89.19.52/3010.89.19.53 – 10.89.19.5410.89.19.55
7910.89.19.56/3010.89.19.57 – 10.89.19.5810.89.19.59
8010.89.19.60/3010.89.19.61 – 10.89.19.6210.89.19.63
8110.89.19.64/3010.89.19.65 – 10.89.19.6610.89.19.67
8210.89.19.68/3010.89.19.69 – 10.89.19.7010.89.19.71
8310.89.19.72/3010.89.19.73 – 10.89.19.7410.89.19.75
8410.89.19.76/3010.89.19.77 – 10.89.19.7810.89.19.79
8510.89.19.80/3010.89.19.81 – 10.89.19.8210.89.19.83
8610.89.19.84/3010.89.19.85 – 10.89.19.8610.89.19.87
8710.89.19.88/3010.89.19.89 – 10.89.19.9010.89.19.91
8810.89.19.92/3010.89.19.93 – 10.89.19.9410.89.19.95
8910.89.19.96/3010.89.19.97 – 10.89.19.9810.89.19.99
9010.89.19.100/3010.89.19.101 – 10.89.19.10210.89.19.103
9110.89.19.104/3010.89.19.105 – 10.89.19.10610.89.19.107
9210.89.19.108/3010.89.19.109 – 10.89.19.11010.89.19.111
9310.89.19.112/3010.89.19.113 – 10.89.19.11410.89.19.115
9410.89.19.116/3010.89.19.117 – 10.89.19.11810.89.19.119
9510.89.19.120/3010.89.19.121 – 10.89.19.12210.89.19.123
9610.89.19.124/3010.89.19.125 – 10.89.19.12610.89.19.127
9710.89.19.128/3010.89.19.129 – 10.89.19.13010.89.19.131
9810.89.19.132/3010.89.19.133 – 10.89.19.13410.89.19.135
9910.89.19.136/3010.89.19.137 – 10.89.19.13810.89.19.139
10010.89.19.140/3010.89.19.141 – 10.89.19.14210.89.19.143
10110.89.19.144/3010.89.19.145 – 10.89.19.14610.89.19.147
10210.89.19.148/3010.89.19.149 – 10.89.19.15010.89.19.151
10310.89.19.152/3010.89.19.153 – 10.89.19.15410.89.19.155
10410.89.19.156/3010.89.19.157 – 10.89.19.15810.89.19.159
10510.89.19.160/3010.89.19.161 – 10.89.19.16210.89.19.163
10610.89.19.164/3010.89.19.165 – 10.89.19.16610.89.19.167
10710.89.19.168/3010.89.19.169 – 10.89.19.17010.89.19.171
10810.89.19.172/3010.89.19.173 – 10.89.19.17410.89.19.175
10910.89.19.176/3010.89.19.177 – 10.89.19.17810.89.19.179
11010.89.19.180/3010.89.19.181 – 10.89.19.18210.89.19.183
11110.89.19.184/3010.89.19.185 – 10.89.19.18610.89.19.187
11210.89.19.188/3010.89.19.189 – 10.89.19.19010.89.19.191
11310.89.19.192/3010.89.19.193 – 10.89.19.19410.89.19.195
11410.89.19.196/3010.89.19.197 – 10.89.19.19810.89.19.199
11510.89.19.200/3010.89.19.201 – 10.89.19.20210.89.19.203
11610.89.19.204/3010.89.19.205 – 10.89.19.20610.89.19.207
11710.89.19.208/3010.89.19.209 – 10.89.19.21010.89.19.211
11810.89.19.212/3010.89.19.213 – 10.89.19.21410.89.19.215
11910.89.19.216/3010.89.19.217 – 10.89.19.21810.89.19.219
12010.89.19.220/3010.89.19.221 – 10.89.19.22210.89.19.223
12110.89.19.224/3010.89.19.225 – 10.89.19.22610.89.19.227
12210.89.19.228/3010.89.19.229 – 10.89.19.23010.89.19.231
12310.89.19.232/3010.89.19.233 – 10.89.19.23410.89.19.235
12410.89.19.236/3010.89.19.237 – 10.89.19.23810.89.19.239
12510.89.19.240/3010.89.19.241 – 10.89.19.24210.89.19.243
12610.89.19.244/3010.89.19.245 – 10.89.19.24610.89.19.247
12710.89.19.248/3010.89.19.249 – 10.89.19.25010.89.19.251
12810.89.19.252/3010.89.19.253 – 10.89.19.25410.89.19.255
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 →