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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)10.32.0.0/11
network10.32.0.0/11
broadcast10.63.255.255
first host10.32.0.1
last host10.63.255.254
subnet mask255.224.0.0
wildcard0.31.255.255
addresses2,097,152
usable hosts2,097,150
classA
ipcalc 10.32.0.0/11
address00001010.00100000.00000000.00000000
subnet mask11111111.11100000.00000000.00000000
network00001010.00100000.00000000.00000000
broadcast00001010.00111111.11111111.11111111
green = network part, grey = host part
hex0x0a200000
decimal169869312
reverse dns0.0.32.10.in-addr.arpa
ipv4-mapped::ffff:a20:0

/11 split into /16 · 32 subnets

close ×
#networkhost rangebroadcast
110.32.0.0/1610.32.0.1 – 10.32.255.25410.32.255.255
210.33.0.0/1610.33.0.1 – 10.33.255.25410.33.255.255
310.34.0.0/1610.34.0.1 – 10.34.255.25410.34.255.255
410.35.0.0/1610.35.0.1 – 10.35.255.25410.35.255.255
510.36.0.0/1610.36.0.1 – 10.36.255.25410.36.255.255
610.37.0.0/1610.37.0.1 – 10.37.255.25410.37.255.255
710.38.0.0/1610.38.0.1 – 10.38.255.25410.38.255.255
810.39.0.0/1610.39.0.1 – 10.39.255.25410.39.255.255
910.40.0.0/1610.40.0.1 – 10.40.255.25410.40.255.255
1010.41.0.0/1610.41.0.1 – 10.41.255.25410.41.255.255
1110.42.0.0/1610.42.0.1 – 10.42.255.25410.42.255.255
1210.43.0.0/1610.43.0.1 – 10.43.255.25410.43.255.255
1310.44.0.0/1610.44.0.1 – 10.44.255.25410.44.255.255
1410.45.0.0/1610.45.0.1 – 10.45.255.25410.45.255.255
1510.46.0.0/1610.46.0.1 – 10.46.255.25410.46.255.255
1610.47.0.0/1610.47.0.1 – 10.47.255.25410.47.255.255
1710.48.0.0/1610.48.0.1 – 10.48.255.25410.48.255.255
1810.49.0.0/1610.49.0.1 – 10.49.255.25410.49.255.255
1910.50.0.0/1610.50.0.1 – 10.50.255.25410.50.255.255
2010.51.0.0/1610.51.0.1 – 10.51.255.25410.51.255.255
2110.52.0.0/1610.52.0.1 – 10.52.255.25410.52.255.255
2210.53.0.0/1610.53.0.1 – 10.53.255.25410.53.255.255
2310.54.0.0/1610.54.0.1 – 10.54.255.25410.54.255.255
2410.55.0.0/1610.55.0.1 – 10.55.255.25410.55.255.255
2510.56.0.0/1610.56.0.1 – 10.56.255.25410.56.255.255
2610.57.0.0/1610.57.0.1 – 10.57.255.25410.57.255.255
2710.58.0.0/1610.58.0.1 – 10.58.255.25410.58.255.255
2810.59.0.0/1610.59.0.1 – 10.59.255.25410.59.255.255
2910.60.0.0/1610.60.0.1 – 10.60.255.25410.60.255.255
3010.61.0.0/1610.61.0.1 – 10.61.255.25410.61.255.255
3110.62.0.0/1610.62.0.1 – 10.62.255.25410.62.255.255
3210.63.0.0/1610.63.0.1 – 10.63.255.25410.63.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /11
/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-
/11255.224.0.02,097,1522,097,1501
/12255.240.0.01,048,5761,048,5742 split →
/13255.248.0.0524,288524,2864 split →
/14255.252.0.0262,144262,1428 split →
/15255.254.0.0131,072131,07016 split →
/16255.255.0.065,53665,53432 split →
/17255.255.128.032,76832,76664 split →
/18255.255.192.016,38416,382128 split →
/19255.255.224.08,1928,190256 split →
/20255.255.240.04,0964,094512 split →
/21255.255.248.02,0482,0461,024 split →
/22255.255.252.01,0241,0222,048 split →
/23255.255.254.05125104,096 split →
/24255.255.255.02562548,192 split →
/25255.255.255.12812812616,384 split →
/26255.255.255.192646232,768 split →
/27255.255.255.224323065,536 split →
/28255.255.255.2401614131,072 split →
/29255.255.255.24886262,144 split →
/30255.255.255.25242524,288 split →
/31255.255.255.254221,048,576 split →
/32255.255.255.255112,097,152 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 →