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)10.45.64.0/23
network10.45.64.0/23
broadcast10.45.65.255
first host10.45.64.1
last host10.45.65.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.45.64.0/23
address00001010.00101101.01000000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00101101.01000000.00000000
broadcast00001010.00101101.01000001.11111111
green = network part, grey = host part
hex0x0a2d4000
decimal170737664
reverse dns0.64.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:4000

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.64.0/3010.45.64.1 – 10.45.64.210.45.64.3
210.45.64.4/3010.45.64.5 – 10.45.64.610.45.64.7
310.45.64.8/3010.45.64.9 – 10.45.64.1010.45.64.11
410.45.64.12/3010.45.64.13 – 10.45.64.1410.45.64.15
510.45.64.16/3010.45.64.17 – 10.45.64.1810.45.64.19
610.45.64.20/3010.45.64.21 – 10.45.64.2210.45.64.23
710.45.64.24/3010.45.64.25 – 10.45.64.2610.45.64.27
810.45.64.28/3010.45.64.29 – 10.45.64.3010.45.64.31
910.45.64.32/3010.45.64.33 – 10.45.64.3410.45.64.35
1010.45.64.36/3010.45.64.37 – 10.45.64.3810.45.64.39
1110.45.64.40/3010.45.64.41 – 10.45.64.4210.45.64.43
1210.45.64.44/3010.45.64.45 – 10.45.64.4610.45.64.47
1310.45.64.48/3010.45.64.49 – 10.45.64.5010.45.64.51
1410.45.64.52/3010.45.64.53 – 10.45.64.5410.45.64.55
1510.45.64.56/3010.45.64.57 – 10.45.64.5810.45.64.59
1610.45.64.60/3010.45.64.61 – 10.45.64.6210.45.64.63
1710.45.64.64/3010.45.64.65 – 10.45.64.6610.45.64.67
1810.45.64.68/3010.45.64.69 – 10.45.64.7010.45.64.71
1910.45.64.72/3010.45.64.73 – 10.45.64.7410.45.64.75
2010.45.64.76/3010.45.64.77 – 10.45.64.7810.45.64.79
2110.45.64.80/3010.45.64.81 – 10.45.64.8210.45.64.83
2210.45.64.84/3010.45.64.85 – 10.45.64.8610.45.64.87
2310.45.64.88/3010.45.64.89 – 10.45.64.9010.45.64.91
2410.45.64.92/3010.45.64.93 – 10.45.64.9410.45.64.95
2510.45.64.96/3010.45.64.97 – 10.45.64.9810.45.64.99
2610.45.64.100/3010.45.64.101 – 10.45.64.10210.45.64.103
2710.45.64.104/3010.45.64.105 – 10.45.64.10610.45.64.107
2810.45.64.108/3010.45.64.109 – 10.45.64.11010.45.64.111
2910.45.64.112/3010.45.64.113 – 10.45.64.11410.45.64.115
3010.45.64.116/3010.45.64.117 – 10.45.64.11810.45.64.119
3110.45.64.120/3010.45.64.121 – 10.45.64.12210.45.64.123
3210.45.64.124/3010.45.64.125 – 10.45.64.12610.45.64.127
3310.45.64.128/3010.45.64.129 – 10.45.64.13010.45.64.131
3410.45.64.132/3010.45.64.133 – 10.45.64.13410.45.64.135
3510.45.64.136/3010.45.64.137 – 10.45.64.13810.45.64.139
3610.45.64.140/3010.45.64.141 – 10.45.64.14210.45.64.143
3710.45.64.144/3010.45.64.145 – 10.45.64.14610.45.64.147
3810.45.64.148/3010.45.64.149 – 10.45.64.15010.45.64.151
3910.45.64.152/3010.45.64.153 – 10.45.64.15410.45.64.155
4010.45.64.156/3010.45.64.157 – 10.45.64.15810.45.64.159
4110.45.64.160/3010.45.64.161 – 10.45.64.16210.45.64.163
4210.45.64.164/3010.45.64.165 – 10.45.64.16610.45.64.167
4310.45.64.168/3010.45.64.169 – 10.45.64.17010.45.64.171
4410.45.64.172/3010.45.64.173 – 10.45.64.17410.45.64.175
4510.45.64.176/3010.45.64.177 – 10.45.64.17810.45.64.179
4610.45.64.180/3010.45.64.181 – 10.45.64.18210.45.64.183
4710.45.64.184/3010.45.64.185 – 10.45.64.18610.45.64.187
4810.45.64.188/3010.45.64.189 – 10.45.64.19010.45.64.191
4910.45.64.192/3010.45.64.193 – 10.45.64.19410.45.64.195
5010.45.64.196/3010.45.64.197 – 10.45.64.19810.45.64.199
5110.45.64.200/3010.45.64.201 – 10.45.64.20210.45.64.203
5210.45.64.204/3010.45.64.205 – 10.45.64.20610.45.64.207
5310.45.64.208/3010.45.64.209 – 10.45.64.21010.45.64.211
5410.45.64.212/3010.45.64.213 – 10.45.64.21410.45.64.215
5510.45.64.216/3010.45.64.217 – 10.45.64.21810.45.64.219
5610.45.64.220/3010.45.64.221 – 10.45.64.22210.45.64.223
5710.45.64.224/3010.45.64.225 – 10.45.64.22610.45.64.227
5810.45.64.228/3010.45.64.229 – 10.45.64.23010.45.64.231
5910.45.64.232/3010.45.64.233 – 10.45.64.23410.45.64.235
6010.45.64.236/3010.45.64.237 – 10.45.64.23810.45.64.239
6110.45.64.240/3010.45.64.241 – 10.45.64.24210.45.64.243
6210.45.64.244/3010.45.64.245 – 10.45.64.24610.45.64.247
6310.45.64.248/3010.45.64.249 – 10.45.64.25010.45.64.251
6410.45.64.252/3010.45.64.253 – 10.45.64.25410.45.64.255
6510.45.65.0/3010.45.65.1 – 10.45.65.210.45.65.3
6610.45.65.4/3010.45.65.5 – 10.45.65.610.45.65.7
6710.45.65.8/3010.45.65.9 – 10.45.65.1010.45.65.11
6810.45.65.12/3010.45.65.13 – 10.45.65.1410.45.65.15
6910.45.65.16/3010.45.65.17 – 10.45.65.1810.45.65.19
7010.45.65.20/3010.45.65.21 – 10.45.65.2210.45.65.23
7110.45.65.24/3010.45.65.25 – 10.45.65.2610.45.65.27
7210.45.65.28/3010.45.65.29 – 10.45.65.3010.45.65.31
7310.45.65.32/3010.45.65.33 – 10.45.65.3410.45.65.35
7410.45.65.36/3010.45.65.37 – 10.45.65.3810.45.65.39
7510.45.65.40/3010.45.65.41 – 10.45.65.4210.45.65.43
7610.45.65.44/3010.45.65.45 – 10.45.65.4610.45.65.47
7710.45.65.48/3010.45.65.49 – 10.45.65.5010.45.65.51
7810.45.65.52/3010.45.65.53 – 10.45.65.5410.45.65.55
7910.45.65.56/3010.45.65.57 – 10.45.65.5810.45.65.59
8010.45.65.60/3010.45.65.61 – 10.45.65.6210.45.65.63
8110.45.65.64/3010.45.65.65 – 10.45.65.6610.45.65.67
8210.45.65.68/3010.45.65.69 – 10.45.65.7010.45.65.71
8310.45.65.72/3010.45.65.73 – 10.45.65.7410.45.65.75
8410.45.65.76/3010.45.65.77 – 10.45.65.7810.45.65.79
8510.45.65.80/3010.45.65.81 – 10.45.65.8210.45.65.83
8610.45.65.84/3010.45.65.85 – 10.45.65.8610.45.65.87
8710.45.65.88/3010.45.65.89 – 10.45.65.9010.45.65.91
8810.45.65.92/3010.45.65.93 – 10.45.65.9410.45.65.95
8910.45.65.96/3010.45.65.97 – 10.45.65.9810.45.65.99
9010.45.65.100/3010.45.65.101 – 10.45.65.10210.45.65.103
9110.45.65.104/3010.45.65.105 – 10.45.65.10610.45.65.107
9210.45.65.108/3010.45.65.109 – 10.45.65.11010.45.65.111
9310.45.65.112/3010.45.65.113 – 10.45.65.11410.45.65.115
9410.45.65.116/3010.45.65.117 – 10.45.65.11810.45.65.119
9510.45.65.120/3010.45.65.121 – 10.45.65.12210.45.65.123
9610.45.65.124/3010.45.65.125 – 10.45.65.12610.45.65.127
9710.45.65.128/3010.45.65.129 – 10.45.65.13010.45.65.131
9810.45.65.132/3010.45.65.133 – 10.45.65.13410.45.65.135
9910.45.65.136/3010.45.65.137 – 10.45.65.13810.45.65.139
10010.45.65.140/3010.45.65.141 – 10.45.65.14210.45.65.143
10110.45.65.144/3010.45.65.145 – 10.45.65.14610.45.65.147
10210.45.65.148/3010.45.65.149 – 10.45.65.15010.45.65.151
10310.45.65.152/3010.45.65.153 – 10.45.65.15410.45.65.155
10410.45.65.156/3010.45.65.157 – 10.45.65.15810.45.65.159
10510.45.65.160/3010.45.65.161 – 10.45.65.16210.45.65.163
10610.45.65.164/3010.45.65.165 – 10.45.65.16610.45.65.167
10710.45.65.168/3010.45.65.169 – 10.45.65.17010.45.65.171
10810.45.65.172/3010.45.65.173 – 10.45.65.17410.45.65.175
10910.45.65.176/3010.45.65.177 – 10.45.65.17810.45.65.179
11010.45.65.180/3010.45.65.181 – 10.45.65.18210.45.65.183
11110.45.65.184/3010.45.65.185 – 10.45.65.18610.45.65.187
11210.45.65.188/3010.45.65.189 – 10.45.65.19010.45.65.191
11310.45.65.192/3010.45.65.193 – 10.45.65.19410.45.65.195
11410.45.65.196/3010.45.65.197 – 10.45.65.19810.45.65.199
11510.45.65.200/3010.45.65.201 – 10.45.65.20210.45.65.203
11610.45.65.204/3010.45.65.205 – 10.45.65.20610.45.65.207
11710.45.65.208/3010.45.65.209 – 10.45.65.21010.45.65.211
11810.45.65.212/3010.45.65.213 – 10.45.65.21410.45.65.215
11910.45.65.216/3010.45.65.217 – 10.45.65.21810.45.65.219
12010.45.65.220/3010.45.65.221 – 10.45.65.22210.45.65.223
12110.45.65.224/3010.45.65.225 – 10.45.65.22610.45.65.227
12210.45.65.228/3010.45.65.229 – 10.45.65.23010.45.65.231
12310.45.65.232/3010.45.65.233 – 10.45.65.23410.45.65.235
12410.45.65.236/3010.45.65.237 – 10.45.65.23810.45.65.239
12510.45.65.240/3010.45.65.241 – 10.45.65.24210.45.65.243
12610.45.65.244/3010.45.65.245 – 10.45.65.24610.45.65.247
12710.45.65.248/3010.45.65.249 – 10.45.65.25010.45.65.251
12810.45.65.252/3010.45.65.253 – 10.45.65.25410.45.65.255
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 →