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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)10.80.96.0/23
network10.80.96.0/23
broadcast10.80.97.255
first host10.80.96.1
last host10.80.97.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.80.96.0/23
address00001010.01010000.01100000.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01010000.01100000.00000000
broadcast00001010.01010000.01100001.11111111
green = network part, grey = host part
hex0x0a506000
decimal173039616
reverse dns0.96.80.10.in-addr.arpa
ipv4-mapped::ffff:a50:6000

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.80.96.0/2910.80.96.1 – 10.80.96.610.80.96.7
210.80.96.8/2910.80.96.9 – 10.80.96.1410.80.96.15
310.80.96.16/2910.80.96.17 – 10.80.96.2210.80.96.23
410.80.96.24/2910.80.96.25 – 10.80.96.3010.80.96.31
510.80.96.32/2910.80.96.33 – 10.80.96.3810.80.96.39
610.80.96.40/2910.80.96.41 – 10.80.96.4610.80.96.47
710.80.96.48/2910.80.96.49 – 10.80.96.5410.80.96.55
810.80.96.56/2910.80.96.57 – 10.80.96.6210.80.96.63
910.80.96.64/2910.80.96.65 – 10.80.96.7010.80.96.71
1010.80.96.72/2910.80.96.73 – 10.80.96.7810.80.96.79
1110.80.96.80/2910.80.96.81 – 10.80.96.8610.80.96.87
1210.80.96.88/2910.80.96.89 – 10.80.96.9410.80.96.95
1310.80.96.96/2910.80.96.97 – 10.80.96.10210.80.96.103
1410.80.96.104/2910.80.96.105 – 10.80.96.11010.80.96.111
1510.80.96.112/2910.80.96.113 – 10.80.96.11810.80.96.119
1610.80.96.120/2910.80.96.121 – 10.80.96.12610.80.96.127
1710.80.96.128/2910.80.96.129 – 10.80.96.13410.80.96.135
1810.80.96.136/2910.80.96.137 – 10.80.96.14210.80.96.143
1910.80.96.144/2910.80.96.145 – 10.80.96.15010.80.96.151
2010.80.96.152/2910.80.96.153 – 10.80.96.15810.80.96.159
2110.80.96.160/2910.80.96.161 – 10.80.96.16610.80.96.167
2210.80.96.168/2910.80.96.169 – 10.80.96.17410.80.96.175
2310.80.96.176/2910.80.96.177 – 10.80.96.18210.80.96.183
2410.80.96.184/2910.80.96.185 – 10.80.96.19010.80.96.191
2510.80.96.192/2910.80.96.193 – 10.80.96.19810.80.96.199
2610.80.96.200/2910.80.96.201 – 10.80.96.20610.80.96.207
2710.80.96.208/2910.80.96.209 – 10.80.96.21410.80.96.215
2810.80.96.216/2910.80.96.217 – 10.80.96.22210.80.96.223
2910.80.96.224/2910.80.96.225 – 10.80.96.23010.80.96.231
3010.80.96.232/2910.80.96.233 – 10.80.96.23810.80.96.239
3110.80.96.240/2910.80.96.241 – 10.80.96.24610.80.96.247
3210.80.96.248/2910.80.96.249 – 10.80.96.25410.80.96.255
3310.80.97.0/2910.80.97.1 – 10.80.97.610.80.97.7
3410.80.97.8/2910.80.97.9 – 10.80.97.1410.80.97.15
3510.80.97.16/2910.80.97.17 – 10.80.97.2210.80.97.23
3610.80.97.24/2910.80.97.25 – 10.80.97.3010.80.97.31
3710.80.97.32/2910.80.97.33 – 10.80.97.3810.80.97.39
3810.80.97.40/2910.80.97.41 – 10.80.97.4610.80.97.47
3910.80.97.48/2910.80.97.49 – 10.80.97.5410.80.97.55
4010.80.97.56/2910.80.97.57 – 10.80.97.6210.80.97.63
4110.80.97.64/2910.80.97.65 – 10.80.97.7010.80.97.71
4210.80.97.72/2910.80.97.73 – 10.80.97.7810.80.97.79
4310.80.97.80/2910.80.97.81 – 10.80.97.8610.80.97.87
4410.80.97.88/2910.80.97.89 – 10.80.97.9410.80.97.95
4510.80.97.96/2910.80.97.97 – 10.80.97.10210.80.97.103
4610.80.97.104/2910.80.97.105 – 10.80.97.11010.80.97.111
4710.80.97.112/2910.80.97.113 – 10.80.97.11810.80.97.119
4810.80.97.120/2910.80.97.121 – 10.80.97.12610.80.97.127
4910.80.97.128/2910.80.97.129 – 10.80.97.13410.80.97.135
5010.80.97.136/2910.80.97.137 – 10.80.97.14210.80.97.143
5110.80.97.144/2910.80.97.145 – 10.80.97.15010.80.97.151
5210.80.97.152/2910.80.97.153 – 10.80.97.15810.80.97.159
5310.80.97.160/2910.80.97.161 – 10.80.97.16610.80.97.167
5410.80.97.168/2910.80.97.169 – 10.80.97.17410.80.97.175
5510.80.97.176/2910.80.97.177 – 10.80.97.18210.80.97.183
5610.80.97.184/2910.80.97.185 – 10.80.97.19010.80.97.191
5710.80.97.192/2910.80.97.193 – 10.80.97.19810.80.97.199
5810.80.97.200/2910.80.97.201 – 10.80.97.20610.80.97.207
5910.80.97.208/2910.80.97.209 – 10.80.97.21410.80.97.215
6010.80.97.216/2910.80.97.217 – 10.80.97.22210.80.97.223
6110.80.97.224/2910.80.97.225 – 10.80.97.23010.80.97.231
6210.80.97.232/2910.80.97.233 – 10.80.97.23810.80.97.239
6310.80.97.240/2910.80.97.241 – 10.80.97.24610.80.97.247
6410.80.97.248/2910.80.97.249 – 10.80.97.25410.80.97.255
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 →