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)10.45.74.0/23
network10.45.74.0/23
broadcast10.45.75.255
first host10.45.74.1
last host10.45.75.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.45.74.0/23
address00001010.00101101.01001010.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.00101101.01001010.00000000
broadcast00001010.00101101.01001011.11111111
green = network part, grey = host part
hex0x0a2d4a00
decimal170740224
reverse dns0.74.45.10.in-addr.arpa
ipv4-mapped::ffff:a2d:4a00

/23 split into /30 · 128 subnets

close ×
#networkhost rangebroadcast
110.45.74.0/3010.45.74.1 – 10.45.74.210.45.74.3
210.45.74.4/3010.45.74.5 – 10.45.74.610.45.74.7
310.45.74.8/3010.45.74.9 – 10.45.74.1010.45.74.11
410.45.74.12/3010.45.74.13 – 10.45.74.1410.45.74.15
510.45.74.16/3010.45.74.17 – 10.45.74.1810.45.74.19
610.45.74.20/3010.45.74.21 – 10.45.74.2210.45.74.23
710.45.74.24/3010.45.74.25 – 10.45.74.2610.45.74.27
810.45.74.28/3010.45.74.29 – 10.45.74.3010.45.74.31
910.45.74.32/3010.45.74.33 – 10.45.74.3410.45.74.35
1010.45.74.36/3010.45.74.37 – 10.45.74.3810.45.74.39
1110.45.74.40/3010.45.74.41 – 10.45.74.4210.45.74.43
1210.45.74.44/3010.45.74.45 – 10.45.74.4610.45.74.47
1310.45.74.48/3010.45.74.49 – 10.45.74.5010.45.74.51
1410.45.74.52/3010.45.74.53 – 10.45.74.5410.45.74.55
1510.45.74.56/3010.45.74.57 – 10.45.74.5810.45.74.59
1610.45.74.60/3010.45.74.61 – 10.45.74.6210.45.74.63
1710.45.74.64/3010.45.74.65 – 10.45.74.6610.45.74.67
1810.45.74.68/3010.45.74.69 – 10.45.74.7010.45.74.71
1910.45.74.72/3010.45.74.73 – 10.45.74.7410.45.74.75
2010.45.74.76/3010.45.74.77 – 10.45.74.7810.45.74.79
2110.45.74.80/3010.45.74.81 – 10.45.74.8210.45.74.83
2210.45.74.84/3010.45.74.85 – 10.45.74.8610.45.74.87
2310.45.74.88/3010.45.74.89 – 10.45.74.9010.45.74.91
2410.45.74.92/3010.45.74.93 – 10.45.74.9410.45.74.95
2510.45.74.96/3010.45.74.97 – 10.45.74.9810.45.74.99
2610.45.74.100/3010.45.74.101 – 10.45.74.10210.45.74.103
2710.45.74.104/3010.45.74.105 – 10.45.74.10610.45.74.107
2810.45.74.108/3010.45.74.109 – 10.45.74.11010.45.74.111
2910.45.74.112/3010.45.74.113 – 10.45.74.11410.45.74.115
3010.45.74.116/3010.45.74.117 – 10.45.74.11810.45.74.119
3110.45.74.120/3010.45.74.121 – 10.45.74.12210.45.74.123
3210.45.74.124/3010.45.74.125 – 10.45.74.12610.45.74.127
3310.45.74.128/3010.45.74.129 – 10.45.74.13010.45.74.131
3410.45.74.132/3010.45.74.133 – 10.45.74.13410.45.74.135
3510.45.74.136/3010.45.74.137 – 10.45.74.13810.45.74.139
3610.45.74.140/3010.45.74.141 – 10.45.74.14210.45.74.143
3710.45.74.144/3010.45.74.145 – 10.45.74.14610.45.74.147
3810.45.74.148/3010.45.74.149 – 10.45.74.15010.45.74.151
3910.45.74.152/3010.45.74.153 – 10.45.74.15410.45.74.155
4010.45.74.156/3010.45.74.157 – 10.45.74.15810.45.74.159
4110.45.74.160/3010.45.74.161 – 10.45.74.16210.45.74.163
4210.45.74.164/3010.45.74.165 – 10.45.74.16610.45.74.167
4310.45.74.168/3010.45.74.169 – 10.45.74.17010.45.74.171
4410.45.74.172/3010.45.74.173 – 10.45.74.17410.45.74.175
4510.45.74.176/3010.45.74.177 – 10.45.74.17810.45.74.179
4610.45.74.180/3010.45.74.181 – 10.45.74.18210.45.74.183
4710.45.74.184/3010.45.74.185 – 10.45.74.18610.45.74.187
4810.45.74.188/3010.45.74.189 – 10.45.74.19010.45.74.191
4910.45.74.192/3010.45.74.193 – 10.45.74.19410.45.74.195
5010.45.74.196/3010.45.74.197 – 10.45.74.19810.45.74.199
5110.45.74.200/3010.45.74.201 – 10.45.74.20210.45.74.203
5210.45.74.204/3010.45.74.205 – 10.45.74.20610.45.74.207
5310.45.74.208/3010.45.74.209 – 10.45.74.21010.45.74.211
5410.45.74.212/3010.45.74.213 – 10.45.74.21410.45.74.215
5510.45.74.216/3010.45.74.217 – 10.45.74.21810.45.74.219
5610.45.74.220/3010.45.74.221 – 10.45.74.22210.45.74.223
5710.45.74.224/3010.45.74.225 – 10.45.74.22610.45.74.227
5810.45.74.228/3010.45.74.229 – 10.45.74.23010.45.74.231
5910.45.74.232/3010.45.74.233 – 10.45.74.23410.45.74.235
6010.45.74.236/3010.45.74.237 – 10.45.74.23810.45.74.239
6110.45.74.240/3010.45.74.241 – 10.45.74.24210.45.74.243
6210.45.74.244/3010.45.74.245 – 10.45.74.24610.45.74.247
6310.45.74.248/3010.45.74.249 – 10.45.74.25010.45.74.251
6410.45.74.252/3010.45.74.253 – 10.45.74.25410.45.74.255
6510.45.75.0/3010.45.75.1 – 10.45.75.210.45.75.3
6610.45.75.4/3010.45.75.5 – 10.45.75.610.45.75.7
6710.45.75.8/3010.45.75.9 – 10.45.75.1010.45.75.11
6810.45.75.12/3010.45.75.13 – 10.45.75.1410.45.75.15
6910.45.75.16/3010.45.75.17 – 10.45.75.1810.45.75.19
7010.45.75.20/3010.45.75.21 – 10.45.75.2210.45.75.23
7110.45.75.24/3010.45.75.25 – 10.45.75.2610.45.75.27
7210.45.75.28/3010.45.75.29 – 10.45.75.3010.45.75.31
7310.45.75.32/3010.45.75.33 – 10.45.75.3410.45.75.35
7410.45.75.36/3010.45.75.37 – 10.45.75.3810.45.75.39
7510.45.75.40/3010.45.75.41 – 10.45.75.4210.45.75.43
7610.45.75.44/3010.45.75.45 – 10.45.75.4610.45.75.47
7710.45.75.48/3010.45.75.49 – 10.45.75.5010.45.75.51
7810.45.75.52/3010.45.75.53 – 10.45.75.5410.45.75.55
7910.45.75.56/3010.45.75.57 – 10.45.75.5810.45.75.59
8010.45.75.60/3010.45.75.61 – 10.45.75.6210.45.75.63
8110.45.75.64/3010.45.75.65 – 10.45.75.6610.45.75.67
8210.45.75.68/3010.45.75.69 – 10.45.75.7010.45.75.71
8310.45.75.72/3010.45.75.73 – 10.45.75.7410.45.75.75
8410.45.75.76/3010.45.75.77 – 10.45.75.7810.45.75.79
8510.45.75.80/3010.45.75.81 – 10.45.75.8210.45.75.83
8610.45.75.84/3010.45.75.85 – 10.45.75.8610.45.75.87
8710.45.75.88/3010.45.75.89 – 10.45.75.9010.45.75.91
8810.45.75.92/3010.45.75.93 – 10.45.75.9410.45.75.95
8910.45.75.96/3010.45.75.97 – 10.45.75.9810.45.75.99
9010.45.75.100/3010.45.75.101 – 10.45.75.10210.45.75.103
9110.45.75.104/3010.45.75.105 – 10.45.75.10610.45.75.107
9210.45.75.108/3010.45.75.109 – 10.45.75.11010.45.75.111
9310.45.75.112/3010.45.75.113 – 10.45.75.11410.45.75.115
9410.45.75.116/3010.45.75.117 – 10.45.75.11810.45.75.119
9510.45.75.120/3010.45.75.121 – 10.45.75.12210.45.75.123
9610.45.75.124/3010.45.75.125 – 10.45.75.12610.45.75.127
9710.45.75.128/3010.45.75.129 – 10.45.75.13010.45.75.131
9810.45.75.132/3010.45.75.133 – 10.45.75.13410.45.75.135
9910.45.75.136/3010.45.75.137 – 10.45.75.13810.45.75.139
10010.45.75.140/3010.45.75.141 – 10.45.75.14210.45.75.143
10110.45.75.144/3010.45.75.145 – 10.45.75.14610.45.75.147
10210.45.75.148/3010.45.75.149 – 10.45.75.15010.45.75.151
10310.45.75.152/3010.45.75.153 – 10.45.75.15410.45.75.155
10410.45.75.156/3010.45.75.157 – 10.45.75.15810.45.75.159
10510.45.75.160/3010.45.75.161 – 10.45.75.16210.45.75.163
10610.45.75.164/3010.45.75.165 – 10.45.75.16610.45.75.167
10710.45.75.168/3010.45.75.169 – 10.45.75.17010.45.75.171
10810.45.75.172/3010.45.75.173 – 10.45.75.17410.45.75.175
10910.45.75.176/3010.45.75.177 – 10.45.75.17810.45.75.179
11010.45.75.180/3010.45.75.181 – 10.45.75.18210.45.75.183
11110.45.75.184/3010.45.75.185 – 10.45.75.18610.45.75.187
11210.45.75.188/3010.45.75.189 – 10.45.75.19010.45.75.191
11310.45.75.192/3010.45.75.193 – 10.45.75.19410.45.75.195
11410.45.75.196/3010.45.75.197 – 10.45.75.19810.45.75.199
11510.45.75.200/3010.45.75.201 – 10.45.75.20210.45.75.203
11610.45.75.204/3010.45.75.205 – 10.45.75.20610.45.75.207
11710.45.75.208/3010.45.75.209 – 10.45.75.21010.45.75.211
11810.45.75.212/3010.45.75.213 – 10.45.75.21410.45.75.215
11910.45.75.216/3010.45.75.217 – 10.45.75.21810.45.75.219
12010.45.75.220/3010.45.75.221 – 10.45.75.22210.45.75.223
12110.45.75.224/3010.45.75.225 – 10.45.75.22610.45.75.227
12210.45.75.228/3010.45.75.229 – 10.45.75.23010.45.75.231
12310.45.75.232/3010.45.75.233 – 10.45.75.23410.45.75.235
12410.45.75.236/3010.45.75.237 – 10.45.75.23810.45.75.239
12510.45.75.240/3010.45.75.241 – 10.45.75.24210.45.75.243
12610.45.75.244/3010.45.75.245 – 10.45.75.24610.45.75.247
12710.45.75.248/3010.45.75.249 – 10.45.75.25010.45.75.251
12810.45.75.252/3010.45.75.253 – 10.45.75.25410.45.75.255
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 →