ip
ipku.in

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)10.64.0.0/10
network10.64.0.0/10
broadcast10.127.255.255
first host10.64.0.1
last host10.127.255.254
subnet mask255.192.0.0
wildcard0.63.255.255
addresses4,194,304
usable hosts4,194,302
classA
ipcalc 10.64.0.0/10
address00001010.01000000.00000000.00000000
subnet mask11111111.11000000.00000000.00000000
network00001010.01000000.00000000.00000000
broadcast00001010.01111111.11111111.11111111
green = network part, grey = host part
hex0x0a400000
decimal171966464
reverse dns0.0.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:0

/10 split into /16 · 64 subnets

close ×
#networkhost rangebroadcast
110.64.0.0/1610.64.0.1 – 10.64.255.25410.64.255.255
210.65.0.0/1610.65.0.1 – 10.65.255.25410.65.255.255
310.66.0.0/1610.66.0.1 – 10.66.255.25410.66.255.255
410.67.0.0/1610.67.0.1 – 10.67.255.25410.67.255.255
510.68.0.0/1610.68.0.1 – 10.68.255.25410.68.255.255
610.69.0.0/1610.69.0.1 – 10.69.255.25410.69.255.255
710.70.0.0/1610.70.0.1 – 10.70.255.25410.70.255.255
810.71.0.0/1610.71.0.1 – 10.71.255.25410.71.255.255
910.72.0.0/1610.72.0.1 – 10.72.255.25410.72.255.255
1010.73.0.0/1610.73.0.1 – 10.73.255.25410.73.255.255
1110.74.0.0/1610.74.0.1 – 10.74.255.25410.74.255.255
1210.75.0.0/1610.75.0.1 – 10.75.255.25410.75.255.255
1310.76.0.0/1610.76.0.1 – 10.76.255.25410.76.255.255
1410.77.0.0/1610.77.0.1 – 10.77.255.25410.77.255.255
1510.78.0.0/1610.78.0.1 – 10.78.255.25410.78.255.255
1610.79.0.0/1610.79.0.1 – 10.79.255.25410.79.255.255
1710.80.0.0/1610.80.0.1 – 10.80.255.25410.80.255.255
1810.81.0.0/1610.81.0.1 – 10.81.255.25410.81.255.255
1910.82.0.0/1610.82.0.1 – 10.82.255.25410.82.255.255
2010.83.0.0/1610.83.0.1 – 10.83.255.25410.83.255.255
2110.84.0.0/1610.84.0.1 – 10.84.255.25410.84.255.255
2210.85.0.0/1610.85.0.1 – 10.85.255.25410.85.255.255
2310.86.0.0/1610.86.0.1 – 10.86.255.25410.86.255.255
2410.87.0.0/1610.87.0.1 – 10.87.255.25410.87.255.255
2510.88.0.0/1610.88.0.1 – 10.88.255.25410.88.255.255
2610.89.0.0/1610.89.0.1 – 10.89.255.25410.89.255.255
2710.90.0.0/1610.90.0.1 – 10.90.255.25410.90.255.255
2810.91.0.0/1610.91.0.1 – 10.91.255.25410.91.255.255
2910.92.0.0/1610.92.0.1 – 10.92.255.25410.92.255.255
3010.93.0.0/1610.93.0.1 – 10.93.255.25410.93.255.255
3110.94.0.0/1610.94.0.1 – 10.94.255.25410.94.255.255
3210.95.0.0/1610.95.0.1 – 10.95.255.25410.95.255.255
3310.96.0.0/1610.96.0.1 – 10.96.255.25410.96.255.255
3410.97.0.0/1610.97.0.1 – 10.97.255.25410.97.255.255
3510.98.0.0/1610.98.0.1 – 10.98.255.25410.98.255.255
3610.99.0.0/1610.99.0.1 – 10.99.255.25410.99.255.255
3710.100.0.0/1610.100.0.1 – 10.100.255.25410.100.255.255
3810.101.0.0/1610.101.0.1 – 10.101.255.25410.101.255.255
3910.102.0.0/1610.102.0.1 – 10.102.255.25410.102.255.255
4010.103.0.0/1610.103.0.1 – 10.103.255.25410.103.255.255
4110.104.0.0/1610.104.0.1 – 10.104.255.25410.104.255.255
4210.105.0.0/1610.105.0.1 – 10.105.255.25410.105.255.255
4310.106.0.0/1610.106.0.1 – 10.106.255.25410.106.255.255
4410.107.0.0/1610.107.0.1 – 10.107.255.25410.107.255.255
4510.108.0.0/1610.108.0.1 – 10.108.255.25410.108.255.255
4610.109.0.0/1610.109.0.1 – 10.109.255.25410.109.255.255
4710.110.0.0/1610.110.0.1 – 10.110.255.25410.110.255.255
4810.111.0.0/1610.111.0.1 – 10.111.255.25410.111.255.255
4910.112.0.0/1610.112.0.1 – 10.112.255.25410.112.255.255
5010.113.0.0/1610.113.0.1 – 10.113.255.25410.113.255.255
5110.114.0.0/1610.114.0.1 – 10.114.255.25410.114.255.255
5210.115.0.0/1610.115.0.1 – 10.115.255.25410.115.255.255
5310.116.0.0/1610.116.0.1 – 10.116.255.25410.116.255.255
5410.117.0.0/1610.117.0.1 – 10.117.255.25410.117.255.255
5510.118.0.0/1610.118.0.1 – 10.118.255.25410.118.255.255
5610.119.0.0/1610.119.0.1 – 10.119.255.25410.119.255.255
5710.120.0.0/1610.120.0.1 – 10.120.255.25410.120.255.255
5810.121.0.0/1610.121.0.1 – 10.121.255.25410.121.255.255
5910.122.0.0/1610.122.0.1 – 10.122.255.25410.122.255.255
6010.123.0.0/1610.123.0.1 – 10.123.255.25410.123.255.255
6110.124.0.0/1610.124.0.1 – 10.124.255.25410.124.255.255
6210.125.0.0/1610.125.0.1 – 10.125.255.25410.125.255.255
6310.126.0.0/1610.126.0.1 – 10.126.255.25410.126.255.255
6410.127.0.0/1610.127.0.1 – 10.127.255.25410.127.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /10
/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-
/10255.192.0.04,194,3044,194,3021
/11255.224.0.02,097,1522,097,1502 split →
/12255.240.0.01,048,5761,048,5744 split →
/13255.248.0.0524,288524,2868 split →
/14255.252.0.0262,144262,14216 split →
/15255.254.0.0131,072131,07032 split →
/16255.255.0.065,53665,53464 split →
/17255.255.128.032,76832,766128 split →
/18255.255.192.016,38416,382256 split →
/19255.255.224.08,1928,190512 split →
/20255.255.240.04,0964,0941,024 split →
/21255.255.248.02,0482,0462,048 split →
/22255.255.252.01,0241,0224,096 split →
/23255.255.254.05125108,192 split →
/24255.255.255.025625416,384 split →
/25255.255.255.12812812632,768 split →
/26255.255.255.192646265,536 split →
/27255.255.255.2243230131,072 split →
/28255.255.255.2401614262,144 split →
/29255.255.255.24886524,288 split →
/30255.255.255.252421,048,576 split →
/31255.255.255.254222,097,152 split →
/32255.255.255.255114,194,304 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 →