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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)10.46.64.0/18
network10.46.64.0/18
broadcast10.46.127.255
first host10.46.64.1
last host10.46.127.254
subnet mask255.255.192.0
wildcard0.0.63.255
addresses16,384
usable hosts16,382
classA
ipcalc 10.46.64.0/18
address00001010.00101110.01000000.00000000
subnet mask11111111.11111111.11000000.00000000
network00001010.00101110.01000000.00000000
broadcast00001010.00101110.01111111.11111111
green = network part, grey = host part
hex0x0a2e4000
decimal170803200
reverse dns0.64.46.10.in-addr.arpa
ipv4-mapped::ffff:a2e:4000

/18 split into /24 · 64 subnets

close ×
#networkhost rangebroadcast
110.46.64.0/2410.46.64.1 – 10.46.64.25410.46.64.255
210.46.65.0/2410.46.65.1 – 10.46.65.25410.46.65.255
310.46.66.0/2410.46.66.1 – 10.46.66.25410.46.66.255
410.46.67.0/2410.46.67.1 – 10.46.67.25410.46.67.255
510.46.68.0/2410.46.68.1 – 10.46.68.25410.46.68.255
610.46.69.0/2410.46.69.1 – 10.46.69.25410.46.69.255
710.46.70.0/2410.46.70.1 – 10.46.70.25410.46.70.255
810.46.71.0/2410.46.71.1 – 10.46.71.25410.46.71.255
910.46.72.0/2410.46.72.1 – 10.46.72.25410.46.72.255
1010.46.73.0/2410.46.73.1 – 10.46.73.25410.46.73.255
1110.46.74.0/2410.46.74.1 – 10.46.74.25410.46.74.255
1210.46.75.0/2410.46.75.1 – 10.46.75.25410.46.75.255
1310.46.76.0/2410.46.76.1 – 10.46.76.25410.46.76.255
1410.46.77.0/2410.46.77.1 – 10.46.77.25410.46.77.255
1510.46.78.0/2410.46.78.1 – 10.46.78.25410.46.78.255
1610.46.79.0/2410.46.79.1 – 10.46.79.25410.46.79.255
1710.46.80.0/2410.46.80.1 – 10.46.80.25410.46.80.255
1810.46.81.0/2410.46.81.1 – 10.46.81.25410.46.81.255
1910.46.82.0/2410.46.82.1 – 10.46.82.25410.46.82.255
2010.46.83.0/2410.46.83.1 – 10.46.83.25410.46.83.255
2110.46.84.0/2410.46.84.1 – 10.46.84.25410.46.84.255
2210.46.85.0/2410.46.85.1 – 10.46.85.25410.46.85.255
2310.46.86.0/2410.46.86.1 – 10.46.86.25410.46.86.255
2410.46.87.0/2410.46.87.1 – 10.46.87.25410.46.87.255
2510.46.88.0/2410.46.88.1 – 10.46.88.25410.46.88.255
2610.46.89.0/2410.46.89.1 – 10.46.89.25410.46.89.255
2710.46.90.0/2410.46.90.1 – 10.46.90.25410.46.90.255
2810.46.91.0/2410.46.91.1 – 10.46.91.25410.46.91.255
2910.46.92.0/2410.46.92.1 – 10.46.92.25410.46.92.255
3010.46.93.0/2410.46.93.1 – 10.46.93.25410.46.93.255
3110.46.94.0/2410.46.94.1 – 10.46.94.25410.46.94.255
3210.46.95.0/2410.46.95.1 – 10.46.95.25410.46.95.255
3310.46.96.0/2410.46.96.1 – 10.46.96.25410.46.96.255
3410.46.97.0/2410.46.97.1 – 10.46.97.25410.46.97.255
3510.46.98.0/2410.46.98.1 – 10.46.98.25410.46.98.255
3610.46.99.0/2410.46.99.1 – 10.46.99.25410.46.99.255
3710.46.100.0/2410.46.100.1 – 10.46.100.25410.46.100.255
3810.46.101.0/2410.46.101.1 – 10.46.101.25410.46.101.255
3910.46.102.0/2410.46.102.1 – 10.46.102.25410.46.102.255
4010.46.103.0/2410.46.103.1 – 10.46.103.25410.46.103.255
4110.46.104.0/2410.46.104.1 – 10.46.104.25410.46.104.255
4210.46.105.0/2410.46.105.1 – 10.46.105.25410.46.105.255
4310.46.106.0/2410.46.106.1 – 10.46.106.25410.46.106.255
4410.46.107.0/2410.46.107.1 – 10.46.107.25410.46.107.255
4510.46.108.0/2410.46.108.1 – 10.46.108.25410.46.108.255
4610.46.109.0/2410.46.109.1 – 10.46.109.25410.46.109.255
4710.46.110.0/2410.46.110.1 – 10.46.110.25410.46.110.255
4810.46.111.0/2410.46.111.1 – 10.46.111.25410.46.111.255
4910.46.112.0/2410.46.112.1 – 10.46.112.25410.46.112.255
5010.46.113.0/2410.46.113.1 – 10.46.113.25410.46.113.255
5110.46.114.0/2410.46.114.1 – 10.46.114.25410.46.114.255
5210.46.115.0/2410.46.115.1 – 10.46.115.25410.46.115.255
5310.46.116.0/2410.46.116.1 – 10.46.116.25410.46.116.255
5410.46.117.0/2410.46.117.1 – 10.46.117.25410.46.117.255
5510.46.118.0/2410.46.118.1 – 10.46.118.25410.46.118.255
5610.46.119.0/2410.46.119.1 – 10.46.119.25410.46.119.255
5710.46.120.0/2410.46.120.1 – 10.46.120.25410.46.120.255
5810.46.121.0/2410.46.121.1 – 10.46.121.25410.46.121.255
5910.46.122.0/2410.46.122.1 – 10.46.122.25410.46.122.255
6010.46.123.0/2410.46.123.1 – 10.46.123.25410.46.123.255
6110.46.124.0/2410.46.124.1 – 10.46.124.25410.46.124.255
6210.46.125.0/2410.46.125.1 – 10.46.125.25410.46.125.255
6310.46.126.0/2410.46.126.1 – 10.46.126.25410.46.126.255
6410.46.127.0/2410.46.127.1 – 10.46.127.25410.46.127.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /18
/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-
/18255.255.192.016,38416,3821
/19255.255.224.08,1928,1902 split →
/20255.255.240.04,0964,0944 split →
/21255.255.248.02,0482,0468 split →
/22255.255.252.01,0241,02216 split →
/23255.255.254.051251032 split →
/24255.255.255.025625464 split →
/25255.255.255.128128126128 split →
/26255.255.255.1926462256 split →
/27255.255.255.2243230512 split →
/28255.255.255.24016141,024 split →
/29255.255.255.248862,048 split →
/30255.255.255.252424,096 split →
/31255.255.255.254228,192 split →
/32255.255.255.2551116,384 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 →