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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)10.46.40.0/26
network10.46.40.0/26
broadcast10.46.40.63
first host10.46.40.1
last host10.46.40.62
subnet mask255.255.255.192
wildcard0.0.0.63
addresses64
usable hosts62
classA
ipcalc 10.46.40.0/26
address00001010.00101110.00101000.00000000
subnet mask11111111.11111111.11111111.11000000
network00001010.00101110.00101000.00000000
broadcast00001010.00101110.00101000.00111111
green = network part, grey = host part
hex0x0a2e2800
decimal170797056
reverse dns0.40.46.10.in-addr.arpa
ipv4-mapped::ffff:a2e:2800

/26 split into /30 · 16 subnets

close ×
#networkhost rangebroadcast
110.46.40.0/3010.46.40.1 – 10.46.40.210.46.40.3
210.46.40.4/3010.46.40.5 – 10.46.40.610.46.40.7
310.46.40.8/3010.46.40.9 – 10.46.40.1010.46.40.11
410.46.40.12/3010.46.40.13 – 10.46.40.1410.46.40.15
510.46.40.16/3010.46.40.17 – 10.46.40.1810.46.40.19
610.46.40.20/3010.46.40.21 – 10.46.40.2210.46.40.23
710.46.40.24/3010.46.40.25 – 10.46.40.2610.46.40.27
810.46.40.28/3010.46.40.29 – 10.46.40.3010.46.40.31
910.46.40.32/3010.46.40.33 – 10.46.40.3410.46.40.35
1010.46.40.36/3010.46.40.37 – 10.46.40.3810.46.40.39
1110.46.40.40/3010.46.40.41 – 10.46.40.4210.46.40.43
1210.46.40.44/3010.46.40.45 – 10.46.40.4610.46.40.47
1310.46.40.48/3010.46.40.49 – 10.46.40.5010.46.40.51
1410.46.40.52/3010.46.40.53 – 10.46.40.5410.46.40.55
1510.46.40.56/3010.46.40.57 – 10.46.40.5810.46.40.59
1610.46.40.60/3010.46.40.61 – 10.46.40.6210.46.40.63
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /26
/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-
/24255.255.255.0256254-
/25255.255.255.128128126-
/26255.255.255.19264621
/27255.255.255.22432302 split →
/28255.255.255.24016144 split →
/29255.255.255.248868 split →
/30255.255.255.2524216 split →
/31255.255.255.2542232 split →
/32255.255.255.2551164 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 →