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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)10.59.0.0/16
network10.59.0.0/16
broadcast10.59.255.255
first host10.59.0.1
last host10.59.255.254
subnet mask255.255.0.0
wildcard0.0.255.255
addresses65,536
usable hosts65,534
classA
ipcalc 10.59.0.0/16
address00001010.00111011.00000000.00000000
subnet mask11111111.11111111.00000000.00000000
network00001010.00111011.00000000.00000000
broadcast00001010.00111011.11111111.11111111
green = network part, grey = host part
hex0x0a3b0000
decimal171638784
reverse dns0.0.59.10.in-addr.arpa
ipv4-mapped::ffff:a3b:0

/16 split into /22 · 64 subnets

close ×
#networkhost rangebroadcast
110.59.0.0/2210.59.0.1 – 10.59.3.25410.59.3.255
210.59.4.0/2210.59.4.1 – 10.59.7.25410.59.7.255
310.59.8.0/2210.59.8.1 – 10.59.11.25410.59.11.255
410.59.12.0/2210.59.12.1 – 10.59.15.25410.59.15.255
510.59.16.0/2210.59.16.1 – 10.59.19.25410.59.19.255
610.59.20.0/2210.59.20.1 – 10.59.23.25410.59.23.255
710.59.24.0/2210.59.24.1 – 10.59.27.25410.59.27.255
810.59.28.0/2210.59.28.1 – 10.59.31.25410.59.31.255
910.59.32.0/2210.59.32.1 – 10.59.35.25410.59.35.255
1010.59.36.0/2210.59.36.1 – 10.59.39.25410.59.39.255
1110.59.40.0/2210.59.40.1 – 10.59.43.25410.59.43.255
1210.59.44.0/2210.59.44.1 – 10.59.47.25410.59.47.255
1310.59.48.0/2210.59.48.1 – 10.59.51.25410.59.51.255
1410.59.52.0/2210.59.52.1 – 10.59.55.25410.59.55.255
1510.59.56.0/2210.59.56.1 – 10.59.59.25410.59.59.255
1610.59.60.0/2210.59.60.1 – 10.59.63.25410.59.63.255
1710.59.64.0/2210.59.64.1 – 10.59.67.25410.59.67.255
1810.59.68.0/2210.59.68.1 – 10.59.71.25410.59.71.255
1910.59.72.0/2210.59.72.1 – 10.59.75.25410.59.75.255
2010.59.76.0/2210.59.76.1 – 10.59.79.25410.59.79.255
2110.59.80.0/2210.59.80.1 – 10.59.83.25410.59.83.255
2210.59.84.0/2210.59.84.1 – 10.59.87.25410.59.87.255
2310.59.88.0/2210.59.88.1 – 10.59.91.25410.59.91.255
2410.59.92.0/2210.59.92.1 – 10.59.95.25410.59.95.255
2510.59.96.0/2210.59.96.1 – 10.59.99.25410.59.99.255
2610.59.100.0/2210.59.100.1 – 10.59.103.25410.59.103.255
2710.59.104.0/2210.59.104.1 – 10.59.107.25410.59.107.255
2810.59.108.0/2210.59.108.1 – 10.59.111.25410.59.111.255
2910.59.112.0/2210.59.112.1 – 10.59.115.25410.59.115.255
3010.59.116.0/2210.59.116.1 – 10.59.119.25410.59.119.255
3110.59.120.0/2210.59.120.1 – 10.59.123.25410.59.123.255
3210.59.124.0/2210.59.124.1 – 10.59.127.25410.59.127.255
3310.59.128.0/2210.59.128.1 – 10.59.131.25410.59.131.255
3410.59.132.0/2210.59.132.1 – 10.59.135.25410.59.135.255
3510.59.136.0/2210.59.136.1 – 10.59.139.25410.59.139.255
3610.59.140.0/2210.59.140.1 – 10.59.143.25410.59.143.255
3710.59.144.0/2210.59.144.1 – 10.59.147.25410.59.147.255
3810.59.148.0/2210.59.148.1 – 10.59.151.25410.59.151.255
3910.59.152.0/2210.59.152.1 – 10.59.155.25410.59.155.255
4010.59.156.0/2210.59.156.1 – 10.59.159.25410.59.159.255
4110.59.160.0/2210.59.160.1 – 10.59.163.25410.59.163.255
4210.59.164.0/2210.59.164.1 – 10.59.167.25410.59.167.255
4310.59.168.0/2210.59.168.1 – 10.59.171.25410.59.171.255
4410.59.172.0/2210.59.172.1 – 10.59.175.25410.59.175.255
4510.59.176.0/2210.59.176.1 – 10.59.179.25410.59.179.255
4610.59.180.0/2210.59.180.1 – 10.59.183.25410.59.183.255
4710.59.184.0/2210.59.184.1 – 10.59.187.25410.59.187.255
4810.59.188.0/2210.59.188.1 – 10.59.191.25410.59.191.255
4910.59.192.0/2210.59.192.1 – 10.59.195.25410.59.195.255
5010.59.196.0/2210.59.196.1 – 10.59.199.25410.59.199.255
5110.59.200.0/2210.59.200.1 – 10.59.203.25410.59.203.255
5210.59.204.0/2210.59.204.1 – 10.59.207.25410.59.207.255
5310.59.208.0/2210.59.208.1 – 10.59.211.25410.59.211.255
5410.59.212.0/2210.59.212.1 – 10.59.215.25410.59.215.255
5510.59.216.0/2210.59.216.1 – 10.59.219.25410.59.219.255
5610.59.220.0/2210.59.220.1 – 10.59.223.25410.59.223.255
5710.59.224.0/2210.59.224.1 – 10.59.227.25410.59.227.255
5810.59.228.0/2210.59.228.1 – 10.59.231.25410.59.231.255
5910.59.232.0/2210.59.232.1 – 10.59.235.25410.59.235.255
6010.59.236.0/2210.59.236.1 – 10.59.239.25410.59.239.255
6110.59.240.0/2210.59.240.1 – 10.59.243.25410.59.243.255
6210.59.244.0/2210.59.244.1 – 10.59.247.25410.59.247.255
6310.59.248.0/2210.59.248.1 – 10.59.251.25410.59.251.255
6410.59.252.0/2210.59.252.1 – 10.59.255.25410.59.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /16
/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-
/16255.255.0.065,53665,5341
/17255.255.128.032,76832,7662 split →
/18255.255.192.016,38416,3824 split →
/19255.255.224.08,1928,1908 split →
/20255.255.240.04,0964,09416 split →
/21255.255.248.02,0482,04632 split →
/22255.255.252.01,0241,02264 split →
/23255.255.254.0512510128 split →
/24255.255.255.0256254256 split →
/25255.255.255.128128126512 split →
/26255.255.255.19264621,024 split →
/27255.255.255.22432302,048 split →
/28255.255.255.24016144,096 split →
/29255.255.255.248868,192 split →
/30255.255.255.2524216,384 split →
/31255.255.255.2542232,768 split →
/32255.255.255.2551165,536 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 →