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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)10.78.60.0/23
network10.78.60.0/23
broadcast10.78.61.255
first host10.78.60.1
last host10.78.61.254
subnet mask255.255.254.0
wildcard0.0.1.255
addresses512
usable hosts510
classA
ipcalc 10.78.60.0/23
address00001010.01001110.00111100.00000000
subnet mask11111111.11111111.11111110.00000000
network00001010.01001110.00111100.00000000
broadcast00001010.01001110.00111101.11111111
green = network part, grey = host part
hex0x0a4e3c00
decimal172899328
reverse dns0.60.78.10.in-addr.arpa
ipv4-mapped::ffff:a4e:3c00

/23 split into /29 · 64 subnets

close ×
#networkhost rangebroadcast
110.78.60.0/2910.78.60.1 – 10.78.60.610.78.60.7
210.78.60.8/2910.78.60.9 – 10.78.60.1410.78.60.15
310.78.60.16/2910.78.60.17 – 10.78.60.2210.78.60.23
410.78.60.24/2910.78.60.25 – 10.78.60.3010.78.60.31
510.78.60.32/2910.78.60.33 – 10.78.60.3810.78.60.39
610.78.60.40/2910.78.60.41 – 10.78.60.4610.78.60.47
710.78.60.48/2910.78.60.49 – 10.78.60.5410.78.60.55
810.78.60.56/2910.78.60.57 – 10.78.60.6210.78.60.63
910.78.60.64/2910.78.60.65 – 10.78.60.7010.78.60.71
1010.78.60.72/2910.78.60.73 – 10.78.60.7810.78.60.79
1110.78.60.80/2910.78.60.81 – 10.78.60.8610.78.60.87
1210.78.60.88/2910.78.60.89 – 10.78.60.9410.78.60.95
1310.78.60.96/2910.78.60.97 – 10.78.60.10210.78.60.103
1410.78.60.104/2910.78.60.105 – 10.78.60.11010.78.60.111
1510.78.60.112/2910.78.60.113 – 10.78.60.11810.78.60.119
1610.78.60.120/2910.78.60.121 – 10.78.60.12610.78.60.127
1710.78.60.128/2910.78.60.129 – 10.78.60.13410.78.60.135
1810.78.60.136/2910.78.60.137 – 10.78.60.14210.78.60.143
1910.78.60.144/2910.78.60.145 – 10.78.60.15010.78.60.151
2010.78.60.152/2910.78.60.153 – 10.78.60.15810.78.60.159
2110.78.60.160/2910.78.60.161 – 10.78.60.16610.78.60.167
2210.78.60.168/2910.78.60.169 – 10.78.60.17410.78.60.175
2310.78.60.176/2910.78.60.177 – 10.78.60.18210.78.60.183
2410.78.60.184/2910.78.60.185 – 10.78.60.19010.78.60.191
2510.78.60.192/2910.78.60.193 – 10.78.60.19810.78.60.199
2610.78.60.200/2910.78.60.201 – 10.78.60.20610.78.60.207
2710.78.60.208/2910.78.60.209 – 10.78.60.21410.78.60.215
2810.78.60.216/2910.78.60.217 – 10.78.60.22210.78.60.223
2910.78.60.224/2910.78.60.225 – 10.78.60.23010.78.60.231
3010.78.60.232/2910.78.60.233 – 10.78.60.23810.78.60.239
3110.78.60.240/2910.78.60.241 – 10.78.60.24610.78.60.247
3210.78.60.248/2910.78.60.249 – 10.78.60.25410.78.60.255
3310.78.61.0/2910.78.61.1 – 10.78.61.610.78.61.7
3410.78.61.8/2910.78.61.9 – 10.78.61.1410.78.61.15
3510.78.61.16/2910.78.61.17 – 10.78.61.2210.78.61.23
3610.78.61.24/2910.78.61.25 – 10.78.61.3010.78.61.31
3710.78.61.32/2910.78.61.33 – 10.78.61.3810.78.61.39
3810.78.61.40/2910.78.61.41 – 10.78.61.4610.78.61.47
3910.78.61.48/2910.78.61.49 – 10.78.61.5410.78.61.55
4010.78.61.56/2910.78.61.57 – 10.78.61.6210.78.61.63
4110.78.61.64/2910.78.61.65 – 10.78.61.7010.78.61.71
4210.78.61.72/2910.78.61.73 – 10.78.61.7810.78.61.79
4310.78.61.80/2910.78.61.81 – 10.78.61.8610.78.61.87
4410.78.61.88/2910.78.61.89 – 10.78.61.9410.78.61.95
4510.78.61.96/2910.78.61.97 – 10.78.61.10210.78.61.103
4610.78.61.104/2910.78.61.105 – 10.78.61.11010.78.61.111
4710.78.61.112/2910.78.61.113 – 10.78.61.11810.78.61.119
4810.78.61.120/2910.78.61.121 – 10.78.61.12610.78.61.127
4910.78.61.128/2910.78.61.129 – 10.78.61.13410.78.61.135
5010.78.61.136/2910.78.61.137 – 10.78.61.14210.78.61.143
5110.78.61.144/2910.78.61.145 – 10.78.61.15010.78.61.151
5210.78.61.152/2910.78.61.153 – 10.78.61.15810.78.61.159
5310.78.61.160/2910.78.61.161 – 10.78.61.16610.78.61.167
5410.78.61.168/2910.78.61.169 – 10.78.61.17410.78.61.175
5510.78.61.176/2910.78.61.177 – 10.78.61.18210.78.61.183
5610.78.61.184/2910.78.61.185 – 10.78.61.19010.78.61.191
5710.78.61.192/2910.78.61.193 – 10.78.61.19810.78.61.199
5810.78.61.200/2910.78.61.201 – 10.78.61.20610.78.61.207
5910.78.61.208/2910.78.61.209 – 10.78.61.21410.78.61.215
6010.78.61.216/2910.78.61.217 – 10.78.61.22210.78.61.223
6110.78.61.224/2910.78.61.225 – 10.78.61.23010.78.61.231
6210.78.61.232/2910.78.61.233 – 10.78.61.23810.78.61.239
6310.78.61.240/2910.78.61.241 – 10.78.61.24610.78.61.247
6410.78.61.248/2910.78.61.249 – 10.78.61.25410.78.61.255
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 →