ip
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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)10.85.76.0/24
network10.85.76.0/24
broadcast10.85.76.255
first host10.85.76.1
last host10.85.76.254
subnet mask255.255.255.0
wildcard0.0.0.255
addresses256
usable hosts254
classA
ipcalc 10.85.76.0/24
address00001010.01010101.01001100.00000000
subnet mask11111111.11111111.11111111.00000000
network00001010.01010101.01001100.00000000
broadcast00001010.01010101.01001100.11111111
green = network part, grey = host part
hex0x0a554c00
decimal173362176
reverse dns0.76.85.10.in-addr.arpa
ipv4-mapped::ffff:a55:4c00

/24 split into /29 · 32 subnets

close ×
#networkhost rangebroadcast
110.85.76.0/2910.85.76.1 – 10.85.76.610.85.76.7
210.85.76.8/2910.85.76.9 – 10.85.76.1410.85.76.15
310.85.76.16/2910.85.76.17 – 10.85.76.2210.85.76.23
410.85.76.24/2910.85.76.25 – 10.85.76.3010.85.76.31
510.85.76.32/2910.85.76.33 – 10.85.76.3810.85.76.39
610.85.76.40/2910.85.76.41 – 10.85.76.4610.85.76.47
710.85.76.48/2910.85.76.49 – 10.85.76.5410.85.76.55
810.85.76.56/2910.85.76.57 – 10.85.76.6210.85.76.63
910.85.76.64/2910.85.76.65 – 10.85.76.7010.85.76.71
1010.85.76.72/2910.85.76.73 – 10.85.76.7810.85.76.79
1110.85.76.80/2910.85.76.81 – 10.85.76.8610.85.76.87
1210.85.76.88/2910.85.76.89 – 10.85.76.9410.85.76.95
1310.85.76.96/2910.85.76.97 – 10.85.76.10210.85.76.103
1410.85.76.104/2910.85.76.105 – 10.85.76.11010.85.76.111
1510.85.76.112/2910.85.76.113 – 10.85.76.11810.85.76.119
1610.85.76.120/2910.85.76.121 – 10.85.76.12610.85.76.127
1710.85.76.128/2910.85.76.129 – 10.85.76.13410.85.76.135
1810.85.76.136/2910.85.76.137 – 10.85.76.14210.85.76.143
1910.85.76.144/2910.85.76.145 – 10.85.76.15010.85.76.151
2010.85.76.152/2910.85.76.153 – 10.85.76.15810.85.76.159
2110.85.76.160/2910.85.76.161 – 10.85.76.16610.85.76.167
2210.85.76.168/2910.85.76.169 – 10.85.76.17410.85.76.175
2310.85.76.176/2910.85.76.177 – 10.85.76.18210.85.76.183
2410.85.76.184/2910.85.76.185 – 10.85.76.19010.85.76.191
2510.85.76.192/2910.85.76.193 – 10.85.76.19810.85.76.199
2610.85.76.200/2910.85.76.201 – 10.85.76.20610.85.76.207
2710.85.76.208/2910.85.76.209 – 10.85.76.21410.85.76.215
2810.85.76.216/2910.85.76.217 – 10.85.76.22210.85.76.223
2910.85.76.224/2910.85.76.225 – 10.85.76.23010.85.76.231
3010.85.76.232/2910.85.76.233 – 10.85.76.23810.85.76.239
3110.85.76.240/2910.85.76.241 – 10.85.76.24610.85.76.247
3210.85.76.248/2910.85.76.249 – 10.85.76.25410.85.76.255
01 / table

IPv4 CIDR prefix table.

Click a prefix longer than your network to split it into subnets.

prefixsubnet maskaddresseshostsin your /24
/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-
/23255.255.254.0512510-
/24255.255.255.02562541
/25255.255.255.1281281262 split →
/26255.255.255.19264624 split →
/27255.255.255.22432308 split →
/28255.255.255.240161416 split →
/29255.255.255.2488632 split →
/30255.255.255.2524264 split →
/31255.255.255.25422128 split →
/32255.255.255.25511256 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 →