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)10.45.90.0/23
network10.45.90.0/23
broadcast10.45.91.255
first host10.45.90.1
last host10.45.91.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.45.90.0/23
address00001010.00101101.01011010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00101101.01011010.00000000
broadcast00001010.00101101.01011011.11111111
green = network part, grey = host part
hex0x0a2d5a00
decimal170744320
reverse dns0.90.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:5a00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.90.0/3010.45.90.1 – 10.45.90.210.45.90.3
210.45.90.4/3010.45.90.5 – 10.45.90.610.45.90.7
310.45.90.8/3010.45.90.9 – 10.45.90.1010.45.90.11
410.45.90.12/3010.45.90.13 – 10.45.90.1410.45.90.15
510.45.90.16/3010.45.90.17 – 10.45.90.1810.45.90.19
610.45.90.20/3010.45.90.21 – 10.45.90.2210.45.90.23
710.45.90.24/3010.45.90.25 – 10.45.90.2610.45.90.27
810.45.90.28/3010.45.90.29 – 10.45.90.3010.45.90.31
910.45.90.32/3010.45.90.33 – 10.45.90.3410.45.90.35
1010.45.90.36/3010.45.90.37 – 10.45.90.3810.45.90.39
1110.45.90.40/3010.45.90.41 – 10.45.90.4210.45.90.43
1210.45.90.44/3010.45.90.45 – 10.45.90.4610.45.90.47
1310.45.90.48/3010.45.90.49 – 10.45.90.5010.45.90.51
1410.45.90.52/3010.45.90.53 – 10.45.90.5410.45.90.55
1510.45.90.56/3010.45.90.57 – 10.45.90.5810.45.90.59
1610.45.90.60/3010.45.90.61 – 10.45.90.6210.45.90.63
1710.45.90.64/3010.45.90.65 – 10.45.90.6610.45.90.67
1810.45.90.68/3010.45.90.69 – 10.45.90.7010.45.90.71
1910.45.90.72/3010.45.90.73 – 10.45.90.7410.45.90.75
2010.45.90.76/3010.45.90.77 – 10.45.90.7810.45.90.79
2110.45.90.80/3010.45.90.81 – 10.45.90.8210.45.90.83
2210.45.90.84/3010.45.90.85 – 10.45.90.8610.45.90.87
2310.45.90.88/3010.45.90.89 – 10.45.90.9010.45.90.91
2410.45.90.92/3010.45.90.93 – 10.45.90.9410.45.90.95
2510.45.90.96/3010.45.90.97 – 10.45.90.9810.45.90.99
2610.45.90.100/3010.45.90.101 – 10.45.90.10210.45.90.103
2710.45.90.104/3010.45.90.105 – 10.45.90.10610.45.90.107
2810.45.90.108/3010.45.90.109 – 10.45.90.11010.45.90.111
2910.45.90.112/3010.45.90.113 – 10.45.90.11410.45.90.115
3010.45.90.116/3010.45.90.117 – 10.45.90.11810.45.90.119
3110.45.90.120/3010.45.90.121 – 10.45.90.12210.45.90.123
3210.45.90.124/3010.45.90.125 – 10.45.90.12610.45.90.127
3310.45.90.128/3010.45.90.129 – 10.45.90.13010.45.90.131
3410.45.90.132/3010.45.90.133 – 10.45.90.13410.45.90.135
3510.45.90.136/3010.45.90.137 – 10.45.90.13810.45.90.139
3610.45.90.140/3010.45.90.141 – 10.45.90.14210.45.90.143
3710.45.90.144/3010.45.90.145 – 10.45.90.14610.45.90.147
3810.45.90.148/3010.45.90.149 – 10.45.90.15010.45.90.151
3910.45.90.152/3010.45.90.153 – 10.45.90.15410.45.90.155
4010.45.90.156/3010.45.90.157 – 10.45.90.15810.45.90.159
4110.45.90.160/3010.45.90.161 – 10.45.90.16210.45.90.163
4210.45.90.164/3010.45.90.165 – 10.45.90.16610.45.90.167
4310.45.90.168/3010.45.90.169 – 10.45.90.17010.45.90.171
4410.45.90.172/3010.45.90.173 – 10.45.90.17410.45.90.175
4510.45.90.176/3010.45.90.177 – 10.45.90.17810.45.90.179
4610.45.90.180/3010.45.90.181 – 10.45.90.18210.45.90.183
4710.45.90.184/3010.45.90.185 – 10.45.90.18610.45.90.187
4810.45.90.188/3010.45.90.189 – 10.45.90.19010.45.90.191
4910.45.90.192/3010.45.90.193 – 10.45.90.19410.45.90.195
5010.45.90.196/3010.45.90.197 – 10.45.90.19810.45.90.199
5110.45.90.200/3010.45.90.201 – 10.45.90.20210.45.90.203
5210.45.90.204/3010.45.90.205 – 10.45.90.20610.45.90.207
5310.45.90.208/3010.45.90.209 – 10.45.90.21010.45.90.211
5410.45.90.212/3010.45.90.213 – 10.45.90.21410.45.90.215
5510.45.90.216/3010.45.90.217 – 10.45.90.21810.45.90.219
5610.45.90.220/3010.45.90.221 – 10.45.90.22210.45.90.223
5710.45.90.224/3010.45.90.225 – 10.45.90.22610.45.90.227
5810.45.90.228/3010.45.90.229 – 10.45.90.23010.45.90.231
5910.45.90.232/3010.45.90.233 – 10.45.90.23410.45.90.235
6010.45.90.236/3010.45.90.237 – 10.45.90.23810.45.90.239
6110.45.90.240/3010.45.90.241 – 10.45.90.24210.45.90.243
6210.45.90.244/3010.45.90.245 – 10.45.90.24610.45.90.247
6310.45.90.248/3010.45.90.249 – 10.45.90.25010.45.90.251
6410.45.90.252/3010.45.90.253 – 10.45.90.25410.45.90.255
6510.45.91.0/3010.45.91.1 – 10.45.91.210.45.91.3
6610.45.91.4/3010.45.91.5 – 10.45.91.610.45.91.7
6710.45.91.8/3010.45.91.9 – 10.45.91.1010.45.91.11
6810.45.91.12/3010.45.91.13 – 10.45.91.1410.45.91.15
6910.45.91.16/3010.45.91.17 – 10.45.91.1810.45.91.19
7010.45.91.20/3010.45.91.21 – 10.45.91.2210.45.91.23
7110.45.91.24/3010.45.91.25 – 10.45.91.2610.45.91.27
7210.45.91.28/3010.45.91.29 – 10.45.91.3010.45.91.31
7310.45.91.32/3010.45.91.33 – 10.45.91.3410.45.91.35
7410.45.91.36/3010.45.91.37 – 10.45.91.3810.45.91.39
7510.45.91.40/3010.45.91.41 – 10.45.91.4210.45.91.43
7610.45.91.44/3010.45.91.45 – 10.45.91.4610.45.91.47
7710.45.91.48/3010.45.91.49 – 10.45.91.5010.45.91.51
7810.45.91.52/3010.45.91.53 – 10.45.91.5410.45.91.55
7910.45.91.56/3010.45.91.57 – 10.45.91.5810.45.91.59
8010.45.91.60/3010.45.91.61 – 10.45.91.6210.45.91.63
8110.45.91.64/3010.45.91.65 – 10.45.91.6610.45.91.67
8210.45.91.68/3010.45.91.69 – 10.45.91.7010.45.91.71
8310.45.91.72/3010.45.91.73 – 10.45.91.7410.45.91.75
8410.45.91.76/3010.45.91.77 – 10.45.91.7810.45.91.79
8510.45.91.80/3010.45.91.81 – 10.45.91.8210.45.91.83
8610.45.91.84/3010.45.91.85 – 10.45.91.8610.45.91.87
8710.45.91.88/3010.45.91.89 – 10.45.91.9010.45.91.91
8810.45.91.92/3010.45.91.93 – 10.45.91.9410.45.91.95
8910.45.91.96/3010.45.91.97 – 10.45.91.9810.45.91.99
9010.45.91.100/3010.45.91.101 – 10.45.91.10210.45.91.103
9110.45.91.104/3010.45.91.105 – 10.45.91.10610.45.91.107
9210.45.91.108/3010.45.91.109 – 10.45.91.11010.45.91.111
9310.45.91.112/3010.45.91.113 – 10.45.91.11410.45.91.115
9410.45.91.116/3010.45.91.117 – 10.45.91.11810.45.91.119
9510.45.91.120/3010.45.91.121 – 10.45.91.12210.45.91.123
9610.45.91.124/3010.45.91.125 – 10.45.91.12610.45.91.127
9710.45.91.128/3010.45.91.129 – 10.45.91.13010.45.91.131
9810.45.91.132/3010.45.91.133 – 10.45.91.13410.45.91.135
9910.45.91.136/3010.45.91.137 – 10.45.91.13810.45.91.139
10010.45.91.140/3010.45.91.141 – 10.45.91.14210.45.91.143
10110.45.91.144/3010.45.91.145 – 10.45.91.14610.45.91.147
10210.45.91.148/3010.45.91.149 – 10.45.91.15010.45.91.151
10310.45.91.152/3010.45.91.153 – 10.45.91.15410.45.91.155
10410.45.91.156/3010.45.91.157 – 10.45.91.15810.45.91.159
10510.45.91.160/3010.45.91.161 – 10.45.91.16210.45.91.163
10610.45.91.164/3010.45.91.165 – 10.45.91.16610.45.91.167
10710.45.91.168/3010.45.91.169 – 10.45.91.17010.45.91.171
10810.45.91.172/3010.45.91.173 – 10.45.91.17410.45.91.175
10910.45.91.176/3010.45.91.177 – 10.45.91.17810.45.91.179
11010.45.91.180/3010.45.91.181 – 10.45.91.18210.45.91.183
11110.45.91.184/3010.45.91.185 – 10.45.91.18610.45.91.187
11210.45.91.188/3010.45.91.189 – 10.45.91.19010.45.91.191
11310.45.91.192/3010.45.91.193 – 10.45.91.19410.45.91.195
11410.45.91.196/3010.45.91.197 – 10.45.91.19810.45.91.199
11510.45.91.200/3010.45.91.201 – 10.45.91.20210.45.91.203
11610.45.91.204/3010.45.91.205 – 10.45.91.20610.45.91.207
11710.45.91.208/3010.45.91.209 – 10.45.91.21010.45.91.211
11810.45.91.212/3010.45.91.213 – 10.45.91.21410.45.91.215
11910.45.91.216/3010.45.91.217 – 10.45.91.21810.45.91.219
12010.45.91.220/3010.45.91.221 – 10.45.91.22210.45.91.223
12110.45.91.224/3010.45.91.225 – 10.45.91.22610.45.91.227
12210.45.91.228/3010.45.91.229 – 10.45.91.23010.45.91.231
12310.45.91.232/3010.45.91.233 – 10.45.91.23410.45.91.235
12410.45.91.236/3010.45.91.237 – 10.45.91.23810.45.91.239
12510.45.91.240/3010.45.91.241 – 10.45.91.24210.45.91.243
12610.45.91.244/3010.45.91.245 – 10.45.91.24610.45.91.247
12710.45.91.248/3010.45.91.249 – 10.45.91.25010.45.91.251
12810.45.91.252/3010.45.91.253 – 10.45.91.25410.45.91.255
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 →