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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)10.128.0.0/14
network10.128.0.0/14
broadcast10.131.255.255
first host10.128.0.1
last host10.131.255.254
subnet mask255.252.0.0
wildcard0.3.255.255
addresses262,144
usable hosts262,142
classA
ipcalc 10.128.0.0/14
address00001010.10000000.00000000.00000000
subnet mask11111111.11111100.00000000.00000000
network00001010.10000000.00000000.00000000
broadcast00001010.10000011.11111111.11111111
green = network part, grey = host part
hex0x0a800000
decimal176160768
reverse dns0.0.128.10.in-addr.arpa
ipv4-mapped::ffff:a80:0

/14 split into /20 · 64 subnets

close ×
#networkhost rangebroadcast
110.128.0.0/2010.128.0.1 – 10.128.15.25410.128.15.255
210.128.16.0/2010.128.16.1 – 10.128.31.25410.128.31.255
310.128.32.0/2010.128.32.1 – 10.128.47.25410.128.47.255
410.128.48.0/2010.128.48.1 – 10.128.63.25410.128.63.255
510.128.64.0/2010.128.64.1 – 10.128.79.25410.128.79.255
610.128.80.0/2010.128.80.1 – 10.128.95.25410.128.95.255
710.128.96.0/2010.128.96.1 – 10.128.111.25410.128.111.255
810.128.112.0/2010.128.112.1 – 10.128.127.25410.128.127.255
910.128.128.0/2010.128.128.1 – 10.128.143.25410.128.143.255
1010.128.144.0/2010.128.144.1 – 10.128.159.25410.128.159.255
1110.128.160.0/2010.128.160.1 – 10.128.175.25410.128.175.255
1210.128.176.0/2010.128.176.1 – 10.128.191.25410.128.191.255
1310.128.192.0/2010.128.192.1 – 10.128.207.25410.128.207.255
1410.128.208.0/2010.128.208.1 – 10.128.223.25410.128.223.255
1510.128.224.0/2010.128.224.1 – 10.128.239.25410.128.239.255
1610.128.240.0/2010.128.240.1 – 10.128.255.25410.128.255.255
1710.129.0.0/2010.129.0.1 – 10.129.15.25410.129.15.255
1810.129.16.0/2010.129.16.1 – 10.129.31.25410.129.31.255
1910.129.32.0/2010.129.32.1 – 10.129.47.25410.129.47.255
2010.129.48.0/2010.129.48.1 – 10.129.63.25410.129.63.255
2110.129.64.0/2010.129.64.1 – 10.129.79.25410.129.79.255
2210.129.80.0/2010.129.80.1 – 10.129.95.25410.129.95.255
2310.129.96.0/2010.129.96.1 – 10.129.111.25410.129.111.255
2410.129.112.0/2010.129.112.1 – 10.129.127.25410.129.127.255
2510.129.128.0/2010.129.128.1 – 10.129.143.25410.129.143.255
2610.129.144.0/2010.129.144.1 – 10.129.159.25410.129.159.255
2710.129.160.0/2010.129.160.1 – 10.129.175.25410.129.175.255
2810.129.176.0/2010.129.176.1 – 10.129.191.25410.129.191.255
2910.129.192.0/2010.129.192.1 – 10.129.207.25410.129.207.255
3010.129.208.0/2010.129.208.1 – 10.129.223.25410.129.223.255
3110.129.224.0/2010.129.224.1 – 10.129.239.25410.129.239.255
3210.129.240.0/2010.129.240.1 – 10.129.255.25410.129.255.255
3310.130.0.0/2010.130.0.1 – 10.130.15.25410.130.15.255
3410.130.16.0/2010.130.16.1 – 10.130.31.25410.130.31.255
3510.130.32.0/2010.130.32.1 – 10.130.47.25410.130.47.255
3610.130.48.0/2010.130.48.1 – 10.130.63.25410.130.63.255
3710.130.64.0/2010.130.64.1 – 10.130.79.25410.130.79.255
3810.130.80.0/2010.130.80.1 – 10.130.95.25410.130.95.255
3910.130.96.0/2010.130.96.1 – 10.130.111.25410.130.111.255
4010.130.112.0/2010.130.112.1 – 10.130.127.25410.130.127.255
4110.130.128.0/2010.130.128.1 – 10.130.143.25410.130.143.255
4210.130.144.0/2010.130.144.1 – 10.130.159.25410.130.159.255
4310.130.160.0/2010.130.160.1 – 10.130.175.25410.130.175.255
4410.130.176.0/2010.130.176.1 – 10.130.191.25410.130.191.255
4510.130.192.0/2010.130.192.1 – 10.130.207.25410.130.207.255
4610.130.208.0/2010.130.208.1 – 10.130.223.25410.130.223.255
4710.130.224.0/2010.130.224.1 – 10.130.239.25410.130.239.255
4810.130.240.0/2010.130.240.1 – 10.130.255.25410.130.255.255
4910.131.0.0/2010.131.0.1 – 10.131.15.25410.131.15.255
5010.131.16.0/2010.131.16.1 – 10.131.31.25410.131.31.255
5110.131.32.0/2010.131.32.1 – 10.131.47.25410.131.47.255
5210.131.48.0/2010.131.48.1 – 10.131.63.25410.131.63.255
5310.131.64.0/2010.131.64.1 – 10.131.79.25410.131.79.255
5410.131.80.0/2010.131.80.1 – 10.131.95.25410.131.95.255
5510.131.96.0/2010.131.96.1 – 10.131.111.25410.131.111.255
5610.131.112.0/2010.131.112.1 – 10.131.127.25410.131.127.255
5710.131.128.0/2010.131.128.1 – 10.131.143.25410.131.143.255
5810.131.144.0/2010.131.144.1 – 10.131.159.25410.131.159.255
5910.131.160.0/2010.131.160.1 – 10.131.175.25410.131.175.255
6010.131.176.0/2010.131.176.1 – 10.131.191.25410.131.191.255
6110.131.192.0/2010.131.192.1 – 10.131.207.25410.131.207.255
6210.131.208.0/2010.131.208.1 – 10.131.223.25410.131.223.255
6310.131.224.0/2010.131.224.1 – 10.131.239.25410.131.239.255
6410.131.240.0/2010.131.240.1 – 10.131.255.25410.131.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /14
/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-
/14255.252.0.0262,144262,1421
/15255.254.0.0131,072131,0702 split →
/16255.255.0.065,53665,5344 split →
/17255.255.128.032,76832,7668 split →
/18255.255.192.016,38416,38216 split →
/19255.255.224.08,1928,19032 split →
/20255.255.240.04,0964,09464 split →
/21255.255.248.02,0482,046128 split →
/22255.255.252.01,0241,022256 split →
/23255.255.254.0512510512 split →
/24255.255.255.02562541,024 split →
/25255.255.255.1281281262,048 split →
/26255.255.255.19264624,096 split →
/27255.255.255.22432308,192 split →
/28255.255.255.240161416,384 split →
/29255.255.255.2488632,768 split →
/30255.255.255.2524265,536 split →
/31255.255.255.25422131,072 split →
/32255.255.255.25511262,144 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 →