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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)10.52.0.0/15
network10.52.0.0/15
broadcast10.53.255.255
first host10.52.0.1
last host10.53.255.254
subnet mask255.254.0.0
wildcard0.1.255.255
addresses131,072
usable hosts131,070
classA
ipcalc 10.52.0.0/15
address00001010.00110100.00000000.00000000
subnet mask11111111.11111110.00000000.00000000
network00001010.00110100.00000000.00000000
broadcast00001010.00110101.11111111.11111111
green = network part, grey = host part
hex0x0a340000
decimal171180032
reverse dns0.0.52.10.in-addr.arpa
ipv4-mapped::ffff:a34:0

/15 split into /21 · 64 subnets

close ×
#networkhost rangebroadcast
110.52.0.0/2110.52.0.1 – 10.52.7.25410.52.7.255
210.52.8.0/2110.52.8.1 – 10.52.15.25410.52.15.255
310.52.16.0/2110.52.16.1 – 10.52.23.25410.52.23.255
410.52.24.0/2110.52.24.1 – 10.52.31.25410.52.31.255
510.52.32.0/2110.52.32.1 – 10.52.39.25410.52.39.255
610.52.40.0/2110.52.40.1 – 10.52.47.25410.52.47.255
710.52.48.0/2110.52.48.1 – 10.52.55.25410.52.55.255
810.52.56.0/2110.52.56.1 – 10.52.63.25410.52.63.255
910.52.64.0/2110.52.64.1 – 10.52.71.25410.52.71.255
1010.52.72.0/2110.52.72.1 – 10.52.79.25410.52.79.255
1110.52.80.0/2110.52.80.1 – 10.52.87.25410.52.87.255
1210.52.88.0/2110.52.88.1 – 10.52.95.25410.52.95.255
1310.52.96.0/2110.52.96.1 – 10.52.103.25410.52.103.255
1410.52.104.0/2110.52.104.1 – 10.52.111.25410.52.111.255
1510.52.112.0/2110.52.112.1 – 10.52.119.25410.52.119.255
1610.52.120.0/2110.52.120.1 – 10.52.127.25410.52.127.255
1710.52.128.0/2110.52.128.1 – 10.52.135.25410.52.135.255
1810.52.136.0/2110.52.136.1 – 10.52.143.25410.52.143.255
1910.52.144.0/2110.52.144.1 – 10.52.151.25410.52.151.255
2010.52.152.0/2110.52.152.1 – 10.52.159.25410.52.159.255
2110.52.160.0/2110.52.160.1 – 10.52.167.25410.52.167.255
2210.52.168.0/2110.52.168.1 – 10.52.175.25410.52.175.255
2310.52.176.0/2110.52.176.1 – 10.52.183.25410.52.183.255
2410.52.184.0/2110.52.184.1 – 10.52.191.25410.52.191.255
2510.52.192.0/2110.52.192.1 – 10.52.199.25410.52.199.255
2610.52.200.0/2110.52.200.1 – 10.52.207.25410.52.207.255
2710.52.208.0/2110.52.208.1 – 10.52.215.25410.52.215.255
2810.52.216.0/2110.52.216.1 – 10.52.223.25410.52.223.255
2910.52.224.0/2110.52.224.1 – 10.52.231.25410.52.231.255
3010.52.232.0/2110.52.232.1 – 10.52.239.25410.52.239.255
3110.52.240.0/2110.52.240.1 – 10.52.247.25410.52.247.255
3210.52.248.0/2110.52.248.1 – 10.52.255.25410.52.255.255
3310.53.0.0/2110.53.0.1 – 10.53.7.25410.53.7.255
3410.53.8.0/2110.53.8.1 – 10.53.15.25410.53.15.255
3510.53.16.0/2110.53.16.1 – 10.53.23.25410.53.23.255
3610.53.24.0/2110.53.24.1 – 10.53.31.25410.53.31.255
3710.53.32.0/2110.53.32.1 – 10.53.39.25410.53.39.255
3810.53.40.0/2110.53.40.1 – 10.53.47.25410.53.47.255
3910.53.48.0/2110.53.48.1 – 10.53.55.25410.53.55.255
4010.53.56.0/2110.53.56.1 – 10.53.63.25410.53.63.255
4110.53.64.0/2110.53.64.1 – 10.53.71.25410.53.71.255
4210.53.72.0/2110.53.72.1 – 10.53.79.25410.53.79.255
4310.53.80.0/2110.53.80.1 – 10.53.87.25410.53.87.255
4410.53.88.0/2110.53.88.1 – 10.53.95.25410.53.95.255
4510.53.96.0/2110.53.96.1 – 10.53.103.25410.53.103.255
4610.53.104.0/2110.53.104.1 – 10.53.111.25410.53.111.255
4710.53.112.0/2110.53.112.1 – 10.53.119.25410.53.119.255
4810.53.120.0/2110.53.120.1 – 10.53.127.25410.53.127.255
4910.53.128.0/2110.53.128.1 – 10.53.135.25410.53.135.255
5010.53.136.0/2110.53.136.1 – 10.53.143.25410.53.143.255
5110.53.144.0/2110.53.144.1 – 10.53.151.25410.53.151.255
5210.53.152.0/2110.53.152.1 – 10.53.159.25410.53.159.255
5310.53.160.0/2110.53.160.1 – 10.53.167.25410.53.167.255
5410.53.168.0/2110.53.168.1 – 10.53.175.25410.53.175.255
5510.53.176.0/2110.53.176.1 – 10.53.183.25410.53.183.255
5610.53.184.0/2110.53.184.1 – 10.53.191.25410.53.191.255
5710.53.192.0/2110.53.192.1 – 10.53.199.25410.53.199.255
5810.53.200.0/2110.53.200.1 – 10.53.207.25410.53.207.255
5910.53.208.0/2110.53.208.1 – 10.53.215.25410.53.215.255
6010.53.216.0/2110.53.216.1 – 10.53.223.25410.53.223.255
6110.53.224.0/2110.53.224.1 – 10.53.231.25410.53.231.255
6210.53.232.0/2110.53.232.1 – 10.53.239.25410.53.239.255
6310.53.240.0/2110.53.240.1 – 10.53.247.25410.53.247.255
6410.53.248.0/2110.53.248.1 – 10.53.255.25410.53.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /15
/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-
/15255.254.0.0131,072131,0701
/16255.255.0.065,53665,5342 split →
/17255.255.128.032,76832,7664 split →
/18255.255.192.016,38416,3828 split →
/19255.255.224.08,1928,19016 split →
/20255.255.240.04,0964,09432 split →
/21255.255.248.02,0482,04664 split →
/22255.255.252.01,0241,022128 split →
/23255.255.254.0512510256 split →
/24255.255.255.0256254512 split →
/25255.255.255.1281281261,024 split →
/26255.255.255.19264622,048 split →
/27255.255.255.22432304,096 split →
/28255.255.255.24016148,192 split →
/29255.255.255.2488616,384 split →
/30255.255.255.2524232,768 split →
/31255.255.255.2542265,536 split →
/32255.255.255.25511131,072 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 →