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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)10.78.150.0/23
network10.78.150.0/23
broadcast10.78.151.255
first host10.78.150.1
last host10.78.151.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.150.0/23
address00001010.01001110.10010110.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.10010110.00000000
broadcast00001010.01001110.10010111.11111111
green = network part, grey = host part
hex0x0a4e9600
decimal172922368
reverse dns0.150.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:9600

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.150.0/2910.78.150.1 – 10.78.150.610.78.150.7
210.78.150.8/2910.78.150.9 – 10.78.150.1410.78.150.15
310.78.150.16/2910.78.150.17 – 10.78.150.2210.78.150.23
410.78.150.24/2910.78.150.25 – 10.78.150.3010.78.150.31
510.78.150.32/2910.78.150.33 – 10.78.150.3810.78.150.39
610.78.150.40/2910.78.150.41 – 10.78.150.4610.78.150.47
710.78.150.48/2910.78.150.49 – 10.78.150.5410.78.150.55
810.78.150.56/2910.78.150.57 – 10.78.150.6210.78.150.63
910.78.150.64/2910.78.150.65 – 10.78.150.7010.78.150.71
1010.78.150.72/2910.78.150.73 – 10.78.150.7810.78.150.79
1110.78.150.80/2910.78.150.81 – 10.78.150.8610.78.150.87
1210.78.150.88/2910.78.150.89 – 10.78.150.9410.78.150.95
1310.78.150.96/2910.78.150.97 – 10.78.150.10210.78.150.103
1410.78.150.104/2910.78.150.105 – 10.78.150.11010.78.150.111
1510.78.150.112/2910.78.150.113 – 10.78.150.11810.78.150.119
1610.78.150.120/2910.78.150.121 – 10.78.150.12610.78.150.127
1710.78.150.128/2910.78.150.129 – 10.78.150.13410.78.150.135
1810.78.150.136/2910.78.150.137 – 10.78.150.14210.78.150.143
1910.78.150.144/2910.78.150.145 – 10.78.150.15010.78.150.151
2010.78.150.152/2910.78.150.153 – 10.78.150.15810.78.150.159
2110.78.150.160/2910.78.150.161 – 10.78.150.16610.78.150.167
2210.78.150.168/2910.78.150.169 – 10.78.150.17410.78.150.175
2310.78.150.176/2910.78.150.177 – 10.78.150.18210.78.150.183
2410.78.150.184/2910.78.150.185 – 10.78.150.19010.78.150.191
2510.78.150.192/2910.78.150.193 – 10.78.150.19810.78.150.199
2610.78.150.200/2910.78.150.201 – 10.78.150.20610.78.150.207
2710.78.150.208/2910.78.150.209 – 10.78.150.21410.78.150.215
2810.78.150.216/2910.78.150.217 – 10.78.150.22210.78.150.223
2910.78.150.224/2910.78.150.225 – 10.78.150.23010.78.150.231
3010.78.150.232/2910.78.150.233 – 10.78.150.23810.78.150.239
3110.78.150.240/2910.78.150.241 – 10.78.150.24610.78.150.247
3210.78.150.248/2910.78.150.249 – 10.78.150.25410.78.150.255
3310.78.151.0/2910.78.151.1 – 10.78.151.610.78.151.7
3410.78.151.8/2910.78.151.9 – 10.78.151.1410.78.151.15
3510.78.151.16/2910.78.151.17 – 10.78.151.2210.78.151.23
3610.78.151.24/2910.78.151.25 – 10.78.151.3010.78.151.31
3710.78.151.32/2910.78.151.33 – 10.78.151.3810.78.151.39
3810.78.151.40/2910.78.151.41 – 10.78.151.4610.78.151.47
3910.78.151.48/2910.78.151.49 – 10.78.151.5410.78.151.55
4010.78.151.56/2910.78.151.57 – 10.78.151.6210.78.151.63
4110.78.151.64/2910.78.151.65 – 10.78.151.7010.78.151.71
4210.78.151.72/2910.78.151.73 – 10.78.151.7810.78.151.79
4310.78.151.80/2910.78.151.81 – 10.78.151.8610.78.151.87
4410.78.151.88/2910.78.151.89 – 10.78.151.9410.78.151.95
4510.78.151.96/2910.78.151.97 – 10.78.151.10210.78.151.103
4610.78.151.104/2910.78.151.105 – 10.78.151.11010.78.151.111
4710.78.151.112/2910.78.151.113 – 10.78.151.11810.78.151.119
4810.78.151.120/2910.78.151.121 – 10.78.151.12610.78.151.127
4910.78.151.128/2910.78.151.129 – 10.78.151.13410.78.151.135
5010.78.151.136/2910.78.151.137 – 10.78.151.14210.78.151.143
5110.78.151.144/2910.78.151.145 – 10.78.151.15010.78.151.151
5210.78.151.152/2910.78.151.153 – 10.78.151.15810.78.151.159
5310.78.151.160/2910.78.151.161 – 10.78.151.16610.78.151.167
5410.78.151.168/2910.78.151.169 – 10.78.151.17410.78.151.175
5510.78.151.176/2910.78.151.177 – 10.78.151.18210.78.151.183
5610.78.151.184/2910.78.151.185 – 10.78.151.19010.78.151.191
5710.78.151.192/2910.78.151.193 – 10.78.151.19810.78.151.199
5810.78.151.200/2910.78.151.201 – 10.78.151.20610.78.151.207
5910.78.151.208/2910.78.151.209 – 10.78.151.21410.78.151.215
6010.78.151.216/2910.78.151.217 – 10.78.151.22210.78.151.223
6110.78.151.224/2910.78.151.225 – 10.78.151.23010.78.151.231
6210.78.151.232/2910.78.151.233 – 10.78.151.23810.78.151.239
6310.78.151.240/2910.78.151.241 – 10.78.151.24610.78.151.247
6410.78.151.248/2910.78.151.249 – 10.78.151.25410.78.151.255
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 →