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)10.48.0.0/12
network10.48.0.0/12
broadcast10.63.255.255
first host10.48.0.1
last host10.63.255.254
subnet mask255.240.0.0
wildcard0.15.255.255
addresses1,048,576
usable hosts1,048,574
classA
ipcalc 10.48.0.0/12
address00001010.00110000.00000000.00000000
subnet mask11111111.11110000.00000000.00000000
network00001010.00110000.00000000.00000000
broadcast00001010.00111111.11111111.11111111
green = network part, grey = host part
hex0x0a300000
decimal170917888
reverse dns0.0.48.10.in-addr.arpa
ipv4-mapped::ffff:a30:0

/12 split into /18 · 64 subnets

close ×
#networkhost rangebroadcast
110.48.0.0/1810.48.0.1 – 10.48.63.25410.48.63.255
210.48.64.0/1810.48.64.1 – 10.48.127.25410.48.127.255
310.48.128.0/1810.48.128.1 – 10.48.191.25410.48.191.255
410.48.192.0/1810.48.192.1 – 10.48.255.25410.48.255.255
510.49.0.0/1810.49.0.1 – 10.49.63.25410.49.63.255
610.49.64.0/1810.49.64.1 – 10.49.127.25410.49.127.255
710.49.128.0/1810.49.128.1 – 10.49.191.25410.49.191.255
810.49.192.0/1810.49.192.1 – 10.49.255.25410.49.255.255
910.50.0.0/1810.50.0.1 – 10.50.63.25410.50.63.255
1010.50.64.0/1810.50.64.1 – 10.50.127.25410.50.127.255
1110.50.128.0/1810.50.128.1 – 10.50.191.25410.50.191.255
1210.50.192.0/1810.50.192.1 – 10.50.255.25410.50.255.255
1310.51.0.0/1810.51.0.1 – 10.51.63.25410.51.63.255
1410.51.64.0/1810.51.64.1 – 10.51.127.25410.51.127.255
1510.51.128.0/1810.51.128.1 – 10.51.191.25410.51.191.255
1610.51.192.0/1810.51.192.1 – 10.51.255.25410.51.255.255
1710.52.0.0/1810.52.0.1 – 10.52.63.25410.52.63.255
1810.52.64.0/1810.52.64.1 – 10.52.127.25410.52.127.255
1910.52.128.0/1810.52.128.1 – 10.52.191.25410.52.191.255
2010.52.192.0/1810.52.192.1 – 10.52.255.25410.52.255.255
2110.53.0.0/1810.53.0.1 – 10.53.63.25410.53.63.255
2210.53.64.0/1810.53.64.1 – 10.53.127.25410.53.127.255
2310.53.128.0/1810.53.128.1 – 10.53.191.25410.53.191.255
2410.53.192.0/1810.53.192.1 – 10.53.255.25410.53.255.255
2510.54.0.0/1810.54.0.1 – 10.54.63.25410.54.63.255
2610.54.64.0/1810.54.64.1 – 10.54.127.25410.54.127.255
2710.54.128.0/1810.54.128.1 – 10.54.191.25410.54.191.255
2810.54.192.0/1810.54.192.1 – 10.54.255.25410.54.255.255
2910.55.0.0/1810.55.0.1 – 10.55.63.25410.55.63.255
3010.55.64.0/1810.55.64.1 – 10.55.127.25410.55.127.255
3110.55.128.0/1810.55.128.1 – 10.55.191.25410.55.191.255
3210.55.192.0/1810.55.192.1 – 10.55.255.25410.55.255.255
3310.56.0.0/1810.56.0.1 – 10.56.63.25410.56.63.255
3410.56.64.0/1810.56.64.1 – 10.56.127.25410.56.127.255
3510.56.128.0/1810.56.128.1 – 10.56.191.25410.56.191.255
3610.56.192.0/1810.56.192.1 – 10.56.255.25410.56.255.255
3710.57.0.0/1810.57.0.1 – 10.57.63.25410.57.63.255
3810.57.64.0/1810.57.64.1 – 10.57.127.25410.57.127.255
3910.57.128.0/1810.57.128.1 – 10.57.191.25410.57.191.255
4010.57.192.0/1810.57.192.1 – 10.57.255.25410.57.255.255
4110.58.0.0/1810.58.0.1 – 10.58.63.25410.58.63.255
4210.58.64.0/1810.58.64.1 – 10.58.127.25410.58.127.255
4310.58.128.0/1810.58.128.1 – 10.58.191.25410.58.191.255
4410.58.192.0/1810.58.192.1 – 10.58.255.25410.58.255.255
4510.59.0.0/1810.59.0.1 – 10.59.63.25410.59.63.255
4610.59.64.0/1810.59.64.1 – 10.59.127.25410.59.127.255
4710.59.128.0/1810.59.128.1 – 10.59.191.25410.59.191.255
4810.59.192.0/1810.59.192.1 – 10.59.255.25410.59.255.255
4910.60.0.0/1810.60.0.1 – 10.60.63.25410.60.63.255
5010.60.64.0/1810.60.64.1 – 10.60.127.25410.60.127.255
5110.60.128.0/1810.60.128.1 – 10.60.191.25410.60.191.255
5210.60.192.0/1810.60.192.1 – 10.60.255.25410.60.255.255
5310.61.0.0/1810.61.0.1 – 10.61.63.25410.61.63.255
5410.61.64.0/1810.61.64.1 – 10.61.127.25410.61.127.255
5510.61.128.0/1810.61.128.1 – 10.61.191.25410.61.191.255
5610.61.192.0/1810.61.192.1 – 10.61.255.25410.61.255.255
5710.62.0.0/1810.62.0.1 – 10.62.63.25410.62.63.255
5810.62.64.0/1810.62.64.1 – 10.62.127.25410.62.127.255
5910.62.128.0/1810.62.128.1 – 10.62.191.25410.62.191.255
6010.62.192.0/1810.62.192.1 – 10.62.255.25410.62.255.255
6110.63.0.0/1810.63.0.1 – 10.63.63.25410.63.63.255
6210.63.64.0/1810.63.64.1 – 10.63.127.25410.63.127.255
6310.63.128.0/1810.63.128.1 – 10.63.191.25410.63.191.255
6410.63.192.0/1810.63.192.1 – 10.63.255.25410.63.255.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /12
/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-
/12255.240.0.01,048,5761,048,5741
/13255.248.0.0524,288524,2862 split →
/14255.252.0.0262,144262,1424 split →
/15255.254.0.0131,072131,0708 split →
/16255.255.0.065,53665,53416 split →
/17255.255.128.032,76832,76632 split →
/18255.255.192.016,38416,38264 split →
/19255.255.224.08,1928,190128 split →
/20255.255.240.04,0964,094256 split →
/21255.255.248.02,0482,046512 split →
/22255.255.252.01,0241,0221,024 split →
/23255.255.254.05125102,048 split →
/24255.255.255.02562544,096 split →
/25255.255.255.1281281268,192 split →
/26255.255.255.192646216,384 split →
/27255.255.255.224323032,768 split →
/28255.255.255.240161465,536 split →
/29255.255.255.24886131,072 split →
/30255.255.255.25242262,144 split →
/31255.255.255.25422524,288 split →
/32255.255.255.255111,048,576 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 →