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)10.64.44.0/23
network10.64.44.0/23
broadcast10.64.45.255
first host10.64.44.1
last host10.64.45.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.64.44.0/23
address00001010.01000000.00101100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01000000.00101100.00000000
broadcast00001010.01000000.00101101.11111111
green = network part, grey = host part
hex0x0a402c00
decimal171977728
reverse dns0.44.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:2c00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.64.44.0/3010.64.44.1 – 10.64.44.210.64.44.3
210.64.44.4/3010.64.44.5 – 10.64.44.610.64.44.7
310.64.44.8/3010.64.44.9 – 10.64.44.1010.64.44.11
410.64.44.12/3010.64.44.13 – 10.64.44.1410.64.44.15
510.64.44.16/3010.64.44.17 – 10.64.44.1810.64.44.19
610.64.44.20/3010.64.44.21 – 10.64.44.2210.64.44.23
710.64.44.24/3010.64.44.25 – 10.64.44.2610.64.44.27
810.64.44.28/3010.64.44.29 – 10.64.44.3010.64.44.31
910.64.44.32/3010.64.44.33 – 10.64.44.3410.64.44.35
1010.64.44.36/3010.64.44.37 – 10.64.44.3810.64.44.39
1110.64.44.40/3010.64.44.41 – 10.64.44.4210.64.44.43
1210.64.44.44/3010.64.44.45 – 10.64.44.4610.64.44.47
1310.64.44.48/3010.64.44.49 – 10.64.44.5010.64.44.51
1410.64.44.52/3010.64.44.53 – 10.64.44.5410.64.44.55
1510.64.44.56/3010.64.44.57 – 10.64.44.5810.64.44.59
1610.64.44.60/3010.64.44.61 – 10.64.44.6210.64.44.63
1710.64.44.64/3010.64.44.65 – 10.64.44.6610.64.44.67
1810.64.44.68/3010.64.44.69 – 10.64.44.7010.64.44.71
1910.64.44.72/3010.64.44.73 – 10.64.44.7410.64.44.75
2010.64.44.76/3010.64.44.77 – 10.64.44.7810.64.44.79
2110.64.44.80/3010.64.44.81 – 10.64.44.8210.64.44.83
2210.64.44.84/3010.64.44.85 – 10.64.44.8610.64.44.87
2310.64.44.88/3010.64.44.89 – 10.64.44.9010.64.44.91
2410.64.44.92/3010.64.44.93 – 10.64.44.9410.64.44.95
2510.64.44.96/3010.64.44.97 – 10.64.44.9810.64.44.99
2610.64.44.100/3010.64.44.101 – 10.64.44.10210.64.44.103
2710.64.44.104/3010.64.44.105 – 10.64.44.10610.64.44.107
2810.64.44.108/3010.64.44.109 – 10.64.44.11010.64.44.111
2910.64.44.112/3010.64.44.113 – 10.64.44.11410.64.44.115
3010.64.44.116/3010.64.44.117 – 10.64.44.11810.64.44.119
3110.64.44.120/3010.64.44.121 – 10.64.44.12210.64.44.123
3210.64.44.124/3010.64.44.125 – 10.64.44.12610.64.44.127
3310.64.44.128/3010.64.44.129 – 10.64.44.13010.64.44.131
3410.64.44.132/3010.64.44.133 – 10.64.44.13410.64.44.135
3510.64.44.136/3010.64.44.137 – 10.64.44.13810.64.44.139
3610.64.44.140/3010.64.44.141 – 10.64.44.14210.64.44.143
3710.64.44.144/3010.64.44.145 – 10.64.44.14610.64.44.147
3810.64.44.148/3010.64.44.149 – 10.64.44.15010.64.44.151
3910.64.44.152/3010.64.44.153 – 10.64.44.15410.64.44.155
4010.64.44.156/3010.64.44.157 – 10.64.44.15810.64.44.159
4110.64.44.160/3010.64.44.161 – 10.64.44.16210.64.44.163
4210.64.44.164/3010.64.44.165 – 10.64.44.16610.64.44.167
4310.64.44.168/3010.64.44.169 – 10.64.44.17010.64.44.171
4410.64.44.172/3010.64.44.173 – 10.64.44.17410.64.44.175
4510.64.44.176/3010.64.44.177 – 10.64.44.17810.64.44.179
4610.64.44.180/3010.64.44.181 – 10.64.44.18210.64.44.183
4710.64.44.184/3010.64.44.185 – 10.64.44.18610.64.44.187
4810.64.44.188/3010.64.44.189 – 10.64.44.19010.64.44.191
4910.64.44.192/3010.64.44.193 – 10.64.44.19410.64.44.195
5010.64.44.196/3010.64.44.197 – 10.64.44.19810.64.44.199
5110.64.44.200/3010.64.44.201 – 10.64.44.20210.64.44.203
5210.64.44.204/3010.64.44.205 – 10.64.44.20610.64.44.207
5310.64.44.208/3010.64.44.209 – 10.64.44.21010.64.44.211
5410.64.44.212/3010.64.44.213 – 10.64.44.21410.64.44.215
5510.64.44.216/3010.64.44.217 – 10.64.44.21810.64.44.219
5610.64.44.220/3010.64.44.221 – 10.64.44.22210.64.44.223
5710.64.44.224/3010.64.44.225 – 10.64.44.22610.64.44.227
5810.64.44.228/3010.64.44.229 – 10.64.44.23010.64.44.231
5910.64.44.232/3010.64.44.233 – 10.64.44.23410.64.44.235
6010.64.44.236/3010.64.44.237 – 10.64.44.23810.64.44.239
6110.64.44.240/3010.64.44.241 – 10.64.44.24210.64.44.243
6210.64.44.244/3010.64.44.245 – 10.64.44.24610.64.44.247
6310.64.44.248/3010.64.44.249 – 10.64.44.25010.64.44.251
6410.64.44.252/3010.64.44.253 – 10.64.44.25410.64.44.255
6510.64.45.0/3010.64.45.1 – 10.64.45.210.64.45.3
6610.64.45.4/3010.64.45.5 – 10.64.45.610.64.45.7
6710.64.45.8/3010.64.45.9 – 10.64.45.1010.64.45.11
6810.64.45.12/3010.64.45.13 – 10.64.45.1410.64.45.15
6910.64.45.16/3010.64.45.17 – 10.64.45.1810.64.45.19
7010.64.45.20/3010.64.45.21 – 10.64.45.2210.64.45.23
7110.64.45.24/3010.64.45.25 – 10.64.45.2610.64.45.27
7210.64.45.28/3010.64.45.29 – 10.64.45.3010.64.45.31
7310.64.45.32/3010.64.45.33 – 10.64.45.3410.64.45.35
7410.64.45.36/3010.64.45.37 – 10.64.45.3810.64.45.39
7510.64.45.40/3010.64.45.41 – 10.64.45.4210.64.45.43
7610.64.45.44/3010.64.45.45 – 10.64.45.4610.64.45.47
7710.64.45.48/3010.64.45.49 – 10.64.45.5010.64.45.51
7810.64.45.52/3010.64.45.53 – 10.64.45.5410.64.45.55
7910.64.45.56/3010.64.45.57 – 10.64.45.5810.64.45.59
8010.64.45.60/3010.64.45.61 – 10.64.45.6210.64.45.63
8110.64.45.64/3010.64.45.65 – 10.64.45.6610.64.45.67
8210.64.45.68/3010.64.45.69 – 10.64.45.7010.64.45.71
8310.64.45.72/3010.64.45.73 – 10.64.45.7410.64.45.75
8410.64.45.76/3010.64.45.77 – 10.64.45.7810.64.45.79
8510.64.45.80/3010.64.45.81 – 10.64.45.8210.64.45.83
8610.64.45.84/3010.64.45.85 – 10.64.45.8610.64.45.87
8710.64.45.88/3010.64.45.89 – 10.64.45.9010.64.45.91
8810.64.45.92/3010.64.45.93 – 10.64.45.9410.64.45.95
8910.64.45.96/3010.64.45.97 – 10.64.45.9810.64.45.99
9010.64.45.100/3010.64.45.101 – 10.64.45.10210.64.45.103
9110.64.45.104/3010.64.45.105 – 10.64.45.10610.64.45.107
9210.64.45.108/3010.64.45.109 – 10.64.45.11010.64.45.111
9310.64.45.112/3010.64.45.113 – 10.64.45.11410.64.45.115
9410.64.45.116/3010.64.45.117 – 10.64.45.11810.64.45.119
9510.64.45.120/3010.64.45.121 – 10.64.45.12210.64.45.123
9610.64.45.124/3010.64.45.125 – 10.64.45.12610.64.45.127
9710.64.45.128/3010.64.45.129 – 10.64.45.13010.64.45.131
9810.64.45.132/3010.64.45.133 – 10.64.45.13410.64.45.135
9910.64.45.136/3010.64.45.137 – 10.64.45.13810.64.45.139
10010.64.45.140/3010.64.45.141 – 10.64.45.14210.64.45.143
10110.64.45.144/3010.64.45.145 – 10.64.45.14610.64.45.147
10210.64.45.148/3010.64.45.149 – 10.64.45.15010.64.45.151
10310.64.45.152/3010.64.45.153 – 10.64.45.15410.64.45.155
10410.64.45.156/3010.64.45.157 – 10.64.45.15810.64.45.159
10510.64.45.160/3010.64.45.161 – 10.64.45.16210.64.45.163
10610.64.45.164/3010.64.45.165 – 10.64.45.16610.64.45.167
10710.64.45.168/3010.64.45.169 – 10.64.45.17010.64.45.171
10810.64.45.172/3010.64.45.173 – 10.64.45.17410.64.45.175
10910.64.45.176/3010.64.45.177 – 10.64.45.17810.64.45.179
11010.64.45.180/3010.64.45.181 – 10.64.45.18210.64.45.183
11110.64.45.184/3010.64.45.185 – 10.64.45.18610.64.45.187
11210.64.45.188/3010.64.45.189 – 10.64.45.19010.64.45.191
11310.64.45.192/3010.64.45.193 – 10.64.45.19410.64.45.195
11410.64.45.196/3010.64.45.197 – 10.64.45.19810.64.45.199
11510.64.45.200/3010.64.45.201 – 10.64.45.20210.64.45.203
11610.64.45.204/3010.64.45.205 – 10.64.45.20610.64.45.207
11710.64.45.208/3010.64.45.209 – 10.64.45.21010.64.45.211
11810.64.45.212/3010.64.45.213 – 10.64.45.21410.64.45.215
11910.64.45.216/3010.64.45.217 – 10.64.45.21810.64.45.219
12010.64.45.220/3010.64.45.221 – 10.64.45.22210.64.45.223
12110.64.45.224/3010.64.45.225 – 10.64.45.22610.64.45.227
12210.64.45.228/3010.64.45.229 – 10.64.45.23010.64.45.231
12310.64.45.232/3010.64.45.233 – 10.64.45.23410.64.45.235
12410.64.45.236/3010.64.45.237 – 10.64.45.23810.64.45.239
12510.64.45.240/3010.64.45.241 – 10.64.45.24210.64.45.243
12610.64.45.244/3010.64.45.245 – 10.64.45.24610.64.45.247
12710.64.45.248/3010.64.45.249 – 10.64.45.25010.64.45.251
12810.64.45.252/3010.64.45.253 – 10.64.45.25410.64.45.255
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 →