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)10.20.64.0/19
network10.20.64.0/19
broadcast10.20.95.255
first host10.20.64.1
last host10.20.95.254
subnet mask255.255.224.0
wildcard0.0.31.255
addresses8,192
usable hosts8,190
classA
ipcalc 10.20.64.0/19
address00001010.00010100.01000000.00000000
subnet mask11111111.11111111.11100000.00000000
network00001010.00010100.01000000.00000000
broadcast00001010.00010100.01011111.11111111
green = network part, grey = host part
hex0x0a144000
decimal169099264
reverse dns0.64.20.10.in-addr.arpa
ipv4-mapped::ffff:a14:4000

/19 split into /26 · 128 subnets

close ×
#networkhost rangebroadcast
110.20.64.0/2610.20.64.1 – 10.20.64.6210.20.64.63
210.20.64.64/2610.20.64.65 – 10.20.64.12610.20.64.127
310.20.64.128/2610.20.64.129 – 10.20.64.19010.20.64.191
410.20.64.192/2610.20.64.193 – 10.20.64.25410.20.64.255
510.20.65.0/2610.20.65.1 – 10.20.65.6210.20.65.63
610.20.65.64/2610.20.65.65 – 10.20.65.12610.20.65.127
710.20.65.128/2610.20.65.129 – 10.20.65.19010.20.65.191
810.20.65.192/2610.20.65.193 – 10.20.65.25410.20.65.255
910.20.66.0/2610.20.66.1 – 10.20.66.6210.20.66.63
1010.20.66.64/2610.20.66.65 – 10.20.66.12610.20.66.127
1110.20.66.128/2610.20.66.129 – 10.20.66.19010.20.66.191
1210.20.66.192/2610.20.66.193 – 10.20.66.25410.20.66.255
1310.20.67.0/2610.20.67.1 – 10.20.67.6210.20.67.63
1410.20.67.64/2610.20.67.65 – 10.20.67.12610.20.67.127
1510.20.67.128/2610.20.67.129 – 10.20.67.19010.20.67.191
1610.20.67.192/2610.20.67.193 – 10.20.67.25410.20.67.255
1710.20.68.0/2610.20.68.1 – 10.20.68.6210.20.68.63
1810.20.68.64/2610.20.68.65 – 10.20.68.12610.20.68.127
1910.20.68.128/2610.20.68.129 – 10.20.68.19010.20.68.191
2010.20.68.192/2610.20.68.193 – 10.20.68.25410.20.68.255
2110.20.69.0/2610.20.69.1 – 10.20.69.6210.20.69.63
2210.20.69.64/2610.20.69.65 – 10.20.69.12610.20.69.127
2310.20.69.128/2610.20.69.129 – 10.20.69.19010.20.69.191
2410.20.69.192/2610.20.69.193 – 10.20.69.25410.20.69.255
2510.20.70.0/2610.20.70.1 – 10.20.70.6210.20.70.63
2610.20.70.64/2610.20.70.65 – 10.20.70.12610.20.70.127
2710.20.70.128/2610.20.70.129 – 10.20.70.19010.20.70.191
2810.20.70.192/2610.20.70.193 – 10.20.70.25410.20.70.255
2910.20.71.0/2610.20.71.1 – 10.20.71.6210.20.71.63
3010.20.71.64/2610.20.71.65 – 10.20.71.12610.20.71.127
3110.20.71.128/2610.20.71.129 – 10.20.71.19010.20.71.191
3210.20.71.192/2610.20.71.193 – 10.20.71.25410.20.71.255
3310.20.72.0/2610.20.72.1 – 10.20.72.6210.20.72.63
3410.20.72.64/2610.20.72.65 – 10.20.72.12610.20.72.127
3510.20.72.128/2610.20.72.129 – 10.20.72.19010.20.72.191
3610.20.72.192/2610.20.72.193 – 10.20.72.25410.20.72.255
3710.20.73.0/2610.20.73.1 – 10.20.73.6210.20.73.63
3810.20.73.64/2610.20.73.65 – 10.20.73.12610.20.73.127
3910.20.73.128/2610.20.73.129 – 10.20.73.19010.20.73.191
4010.20.73.192/2610.20.73.193 – 10.20.73.25410.20.73.255
4110.20.74.0/2610.20.74.1 – 10.20.74.6210.20.74.63
4210.20.74.64/2610.20.74.65 – 10.20.74.12610.20.74.127
4310.20.74.128/2610.20.74.129 – 10.20.74.19010.20.74.191
4410.20.74.192/2610.20.74.193 – 10.20.74.25410.20.74.255
4510.20.75.0/2610.20.75.1 – 10.20.75.6210.20.75.63
4610.20.75.64/2610.20.75.65 – 10.20.75.12610.20.75.127
4710.20.75.128/2610.20.75.129 – 10.20.75.19010.20.75.191
4810.20.75.192/2610.20.75.193 – 10.20.75.25410.20.75.255
4910.20.76.0/2610.20.76.1 – 10.20.76.6210.20.76.63
5010.20.76.64/2610.20.76.65 – 10.20.76.12610.20.76.127
5110.20.76.128/2610.20.76.129 – 10.20.76.19010.20.76.191
5210.20.76.192/2610.20.76.193 – 10.20.76.25410.20.76.255
5310.20.77.0/2610.20.77.1 – 10.20.77.6210.20.77.63
5410.20.77.64/2610.20.77.65 – 10.20.77.12610.20.77.127
5510.20.77.128/2610.20.77.129 – 10.20.77.19010.20.77.191
5610.20.77.192/2610.20.77.193 – 10.20.77.25410.20.77.255
5710.20.78.0/2610.20.78.1 – 10.20.78.6210.20.78.63
5810.20.78.64/2610.20.78.65 – 10.20.78.12610.20.78.127
5910.20.78.128/2610.20.78.129 – 10.20.78.19010.20.78.191
6010.20.78.192/2610.20.78.193 – 10.20.78.25410.20.78.255
6110.20.79.0/2610.20.79.1 – 10.20.79.6210.20.79.63
6210.20.79.64/2610.20.79.65 – 10.20.79.12610.20.79.127
6310.20.79.128/2610.20.79.129 – 10.20.79.19010.20.79.191
6410.20.79.192/2610.20.79.193 – 10.20.79.25410.20.79.255
6510.20.80.0/2610.20.80.1 – 10.20.80.6210.20.80.63
6610.20.80.64/2610.20.80.65 – 10.20.80.12610.20.80.127
6710.20.80.128/2610.20.80.129 – 10.20.80.19010.20.80.191
6810.20.80.192/2610.20.80.193 – 10.20.80.25410.20.80.255
6910.20.81.0/2610.20.81.1 – 10.20.81.6210.20.81.63
7010.20.81.64/2610.20.81.65 – 10.20.81.12610.20.81.127
7110.20.81.128/2610.20.81.129 – 10.20.81.19010.20.81.191
7210.20.81.192/2610.20.81.193 – 10.20.81.25410.20.81.255
7310.20.82.0/2610.20.82.1 – 10.20.82.6210.20.82.63
7410.20.82.64/2610.20.82.65 – 10.20.82.12610.20.82.127
7510.20.82.128/2610.20.82.129 – 10.20.82.19010.20.82.191
7610.20.82.192/2610.20.82.193 – 10.20.82.25410.20.82.255
7710.20.83.0/2610.20.83.1 – 10.20.83.6210.20.83.63
7810.20.83.64/2610.20.83.65 – 10.20.83.12610.20.83.127
7910.20.83.128/2610.20.83.129 – 10.20.83.19010.20.83.191
8010.20.83.192/2610.20.83.193 – 10.20.83.25410.20.83.255
8110.20.84.0/2610.20.84.1 – 10.20.84.6210.20.84.63
8210.20.84.64/2610.20.84.65 – 10.20.84.12610.20.84.127
8310.20.84.128/2610.20.84.129 – 10.20.84.19010.20.84.191
8410.20.84.192/2610.20.84.193 – 10.20.84.25410.20.84.255
8510.20.85.0/2610.20.85.1 – 10.20.85.6210.20.85.63
8610.20.85.64/2610.20.85.65 – 10.20.85.12610.20.85.127
8710.20.85.128/2610.20.85.129 – 10.20.85.19010.20.85.191
8810.20.85.192/2610.20.85.193 – 10.20.85.25410.20.85.255
8910.20.86.0/2610.20.86.1 – 10.20.86.6210.20.86.63
9010.20.86.64/2610.20.86.65 – 10.20.86.12610.20.86.127
9110.20.86.128/2610.20.86.129 – 10.20.86.19010.20.86.191
9210.20.86.192/2610.20.86.193 – 10.20.86.25410.20.86.255
9310.20.87.0/2610.20.87.1 – 10.20.87.6210.20.87.63
9410.20.87.64/2610.20.87.65 – 10.20.87.12610.20.87.127
9510.20.87.128/2610.20.87.129 – 10.20.87.19010.20.87.191
9610.20.87.192/2610.20.87.193 – 10.20.87.25410.20.87.255
9710.20.88.0/2610.20.88.1 – 10.20.88.6210.20.88.63
9810.20.88.64/2610.20.88.65 – 10.20.88.12610.20.88.127
9910.20.88.128/2610.20.88.129 – 10.20.88.19010.20.88.191
10010.20.88.192/2610.20.88.193 – 10.20.88.25410.20.88.255
10110.20.89.0/2610.20.89.1 – 10.20.89.6210.20.89.63
10210.20.89.64/2610.20.89.65 – 10.20.89.12610.20.89.127
10310.20.89.128/2610.20.89.129 – 10.20.89.19010.20.89.191
10410.20.89.192/2610.20.89.193 – 10.20.89.25410.20.89.255
10510.20.90.0/2610.20.90.1 – 10.20.90.6210.20.90.63
10610.20.90.64/2610.20.90.65 – 10.20.90.12610.20.90.127
10710.20.90.128/2610.20.90.129 – 10.20.90.19010.20.90.191
10810.20.90.192/2610.20.90.193 – 10.20.90.25410.20.90.255
10910.20.91.0/2610.20.91.1 – 10.20.91.6210.20.91.63
11010.20.91.64/2610.20.91.65 – 10.20.91.12610.20.91.127
11110.20.91.128/2610.20.91.129 – 10.20.91.19010.20.91.191
11210.20.91.192/2610.20.91.193 – 10.20.91.25410.20.91.255
11310.20.92.0/2610.20.92.1 – 10.20.92.6210.20.92.63
11410.20.92.64/2610.20.92.65 – 10.20.92.12610.20.92.127
11510.20.92.128/2610.20.92.129 – 10.20.92.19010.20.92.191
11610.20.92.192/2610.20.92.193 – 10.20.92.25410.20.92.255
11710.20.93.0/2610.20.93.1 – 10.20.93.6210.20.93.63
11810.20.93.64/2610.20.93.65 – 10.20.93.12610.20.93.127
11910.20.93.128/2610.20.93.129 – 10.20.93.19010.20.93.191
12010.20.93.192/2610.20.93.193 – 10.20.93.25410.20.93.255
12110.20.94.0/2610.20.94.1 – 10.20.94.6210.20.94.63
12210.20.94.64/2610.20.94.65 – 10.20.94.12610.20.94.127
12310.20.94.128/2610.20.94.129 – 10.20.94.19010.20.94.191
12410.20.94.192/2610.20.94.193 – 10.20.94.25410.20.94.255
12510.20.95.0/2610.20.95.1 – 10.20.95.6210.20.95.63
12610.20.95.64/2610.20.95.65 – 10.20.95.12610.20.95.127
12710.20.95.128/2610.20.95.129 – 10.20.95.19010.20.95.191
12810.20.95.192/2610.20.95.193 – 10.20.95.25410.20.95.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /19
/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-
/18255.255.192.016,38416,382-
/19255.255.224.08,1928,1901
/20255.255.240.04,0964,0942 split →
/21255.255.248.02,0482,0464 split →
/22255.255.252.01,0241,0228 split →
/23255.255.254.051251016 split →
/24255.255.255.025625432 split →
/25255.255.255.12812812664 split →
/26255.255.255.1926462128 split →
/27255.255.255.2243230256 split →
/28255.255.255.2401614512 split →
/29255.255.255.248861,024 split →
/30255.255.255.252422,048 split →
/31255.255.255.254224,096 split →
/32255.255.255.255118,192 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 →