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)10.64.0.0/17
network10.64.0.0/17
broadcast10.64.127.255
first host10.64.0.1
last host10.64.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.64.0.0/17
address00001010.01000000.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01000000.00000000.00000000
broadcast00001010.01000000.01111111.11111111
green = network part, grey = host part
hex0x0a400000
decimal171966464
reverse dns0.0.64.10.in-addr.arpa
ipv4-mapped::ffff:a40:0

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.64.0.0/2410.64.0.1 – 10.64.0.25410.64.0.255
210.64.1.0/2410.64.1.1 – 10.64.1.25410.64.1.255
310.64.2.0/2410.64.2.1 – 10.64.2.25410.64.2.255
410.64.3.0/2410.64.3.1 – 10.64.3.25410.64.3.255
510.64.4.0/2410.64.4.1 – 10.64.4.25410.64.4.255
610.64.5.0/2410.64.5.1 – 10.64.5.25410.64.5.255
710.64.6.0/2410.64.6.1 – 10.64.6.25410.64.6.255
810.64.7.0/2410.64.7.1 – 10.64.7.25410.64.7.255
910.64.8.0/2410.64.8.1 – 10.64.8.25410.64.8.255
1010.64.9.0/2410.64.9.1 – 10.64.9.25410.64.9.255
1110.64.10.0/2410.64.10.1 – 10.64.10.25410.64.10.255
1210.64.11.0/2410.64.11.1 – 10.64.11.25410.64.11.255
1310.64.12.0/2410.64.12.1 – 10.64.12.25410.64.12.255
1410.64.13.0/2410.64.13.1 – 10.64.13.25410.64.13.255
1510.64.14.0/2410.64.14.1 – 10.64.14.25410.64.14.255
1610.64.15.0/2410.64.15.1 – 10.64.15.25410.64.15.255
1710.64.16.0/2410.64.16.1 – 10.64.16.25410.64.16.255
1810.64.17.0/2410.64.17.1 – 10.64.17.25410.64.17.255
1910.64.18.0/2410.64.18.1 – 10.64.18.25410.64.18.255
2010.64.19.0/2410.64.19.1 – 10.64.19.25410.64.19.255
2110.64.20.0/2410.64.20.1 – 10.64.20.25410.64.20.255
2210.64.21.0/2410.64.21.1 – 10.64.21.25410.64.21.255
2310.64.22.0/2410.64.22.1 – 10.64.22.25410.64.22.255
2410.64.23.0/2410.64.23.1 – 10.64.23.25410.64.23.255
2510.64.24.0/2410.64.24.1 – 10.64.24.25410.64.24.255
2610.64.25.0/2410.64.25.1 – 10.64.25.25410.64.25.255
2710.64.26.0/2410.64.26.1 – 10.64.26.25410.64.26.255
2810.64.27.0/2410.64.27.1 – 10.64.27.25410.64.27.255
2910.64.28.0/2410.64.28.1 – 10.64.28.25410.64.28.255
3010.64.29.0/2410.64.29.1 – 10.64.29.25410.64.29.255
3110.64.30.0/2410.64.30.1 – 10.64.30.25410.64.30.255
3210.64.31.0/2410.64.31.1 – 10.64.31.25410.64.31.255
3310.64.32.0/2410.64.32.1 – 10.64.32.25410.64.32.255
3410.64.33.0/2410.64.33.1 – 10.64.33.25410.64.33.255
3510.64.34.0/2410.64.34.1 – 10.64.34.25410.64.34.255
3610.64.35.0/2410.64.35.1 – 10.64.35.25410.64.35.255
3710.64.36.0/2410.64.36.1 – 10.64.36.25410.64.36.255
3810.64.37.0/2410.64.37.1 – 10.64.37.25410.64.37.255
3910.64.38.0/2410.64.38.1 – 10.64.38.25410.64.38.255
4010.64.39.0/2410.64.39.1 – 10.64.39.25410.64.39.255
4110.64.40.0/2410.64.40.1 – 10.64.40.25410.64.40.255
4210.64.41.0/2410.64.41.1 – 10.64.41.25410.64.41.255
4310.64.42.0/2410.64.42.1 – 10.64.42.25410.64.42.255
4410.64.43.0/2410.64.43.1 – 10.64.43.25410.64.43.255
4510.64.44.0/2410.64.44.1 – 10.64.44.25410.64.44.255
4610.64.45.0/2410.64.45.1 – 10.64.45.25410.64.45.255
4710.64.46.0/2410.64.46.1 – 10.64.46.25410.64.46.255
4810.64.47.0/2410.64.47.1 – 10.64.47.25410.64.47.255
4910.64.48.0/2410.64.48.1 – 10.64.48.25410.64.48.255
5010.64.49.0/2410.64.49.1 – 10.64.49.25410.64.49.255
5110.64.50.0/2410.64.50.1 – 10.64.50.25410.64.50.255
5210.64.51.0/2410.64.51.1 – 10.64.51.25410.64.51.255
5310.64.52.0/2410.64.52.1 – 10.64.52.25410.64.52.255
5410.64.53.0/2410.64.53.1 – 10.64.53.25410.64.53.255
5510.64.54.0/2410.64.54.1 – 10.64.54.25410.64.54.255
5610.64.55.0/2410.64.55.1 – 10.64.55.25410.64.55.255
5710.64.56.0/2410.64.56.1 – 10.64.56.25410.64.56.255
5810.64.57.0/2410.64.57.1 – 10.64.57.25410.64.57.255
5910.64.58.0/2410.64.58.1 – 10.64.58.25410.64.58.255
6010.64.59.0/2410.64.59.1 – 10.64.59.25410.64.59.255
6110.64.60.0/2410.64.60.1 – 10.64.60.25410.64.60.255
6210.64.61.0/2410.64.61.1 – 10.64.61.25410.64.61.255
6310.64.62.0/2410.64.62.1 – 10.64.62.25410.64.62.255
6410.64.63.0/2410.64.63.1 – 10.64.63.25410.64.63.255
6510.64.64.0/2410.64.64.1 – 10.64.64.25410.64.64.255
6610.64.65.0/2410.64.65.1 – 10.64.65.25410.64.65.255
6710.64.66.0/2410.64.66.1 – 10.64.66.25410.64.66.255
6810.64.67.0/2410.64.67.1 – 10.64.67.25410.64.67.255
6910.64.68.0/2410.64.68.1 – 10.64.68.25410.64.68.255
7010.64.69.0/2410.64.69.1 – 10.64.69.25410.64.69.255
7110.64.70.0/2410.64.70.1 – 10.64.70.25410.64.70.255
7210.64.71.0/2410.64.71.1 – 10.64.71.25410.64.71.255
7310.64.72.0/2410.64.72.1 – 10.64.72.25410.64.72.255
7410.64.73.0/2410.64.73.1 – 10.64.73.25410.64.73.255
7510.64.74.0/2410.64.74.1 – 10.64.74.25410.64.74.255
7610.64.75.0/2410.64.75.1 – 10.64.75.25410.64.75.255
7710.64.76.0/2410.64.76.1 – 10.64.76.25410.64.76.255
7810.64.77.0/2410.64.77.1 – 10.64.77.25410.64.77.255
7910.64.78.0/2410.64.78.1 – 10.64.78.25410.64.78.255
8010.64.79.0/2410.64.79.1 – 10.64.79.25410.64.79.255
8110.64.80.0/2410.64.80.1 – 10.64.80.25410.64.80.255
8210.64.81.0/2410.64.81.1 – 10.64.81.25410.64.81.255
8310.64.82.0/2410.64.82.1 – 10.64.82.25410.64.82.255
8410.64.83.0/2410.64.83.1 – 10.64.83.25410.64.83.255
8510.64.84.0/2410.64.84.1 – 10.64.84.25410.64.84.255
8610.64.85.0/2410.64.85.1 – 10.64.85.25410.64.85.255
8710.64.86.0/2410.64.86.1 – 10.64.86.25410.64.86.255
8810.64.87.0/2410.64.87.1 – 10.64.87.25410.64.87.255
8910.64.88.0/2410.64.88.1 – 10.64.88.25410.64.88.255
9010.64.89.0/2410.64.89.1 – 10.64.89.25410.64.89.255
9110.64.90.0/2410.64.90.1 – 10.64.90.25410.64.90.255
9210.64.91.0/2410.64.91.1 – 10.64.91.25410.64.91.255
9310.64.92.0/2410.64.92.1 – 10.64.92.25410.64.92.255
9410.64.93.0/2410.64.93.1 – 10.64.93.25410.64.93.255
9510.64.94.0/2410.64.94.1 – 10.64.94.25410.64.94.255
9610.64.95.0/2410.64.95.1 – 10.64.95.25410.64.95.255
9710.64.96.0/2410.64.96.1 – 10.64.96.25410.64.96.255
9810.64.97.0/2410.64.97.1 – 10.64.97.25410.64.97.255
9910.64.98.0/2410.64.98.1 – 10.64.98.25410.64.98.255
10010.64.99.0/2410.64.99.1 – 10.64.99.25410.64.99.255
10110.64.100.0/2410.64.100.1 – 10.64.100.25410.64.100.255
10210.64.101.0/2410.64.101.1 – 10.64.101.25410.64.101.255
10310.64.102.0/2410.64.102.1 – 10.64.102.25410.64.102.255
10410.64.103.0/2410.64.103.1 – 10.64.103.25410.64.103.255
10510.64.104.0/2410.64.104.1 – 10.64.104.25410.64.104.255
10610.64.105.0/2410.64.105.1 – 10.64.105.25410.64.105.255
10710.64.106.0/2410.64.106.1 – 10.64.106.25410.64.106.255
10810.64.107.0/2410.64.107.1 – 10.64.107.25410.64.107.255
10910.64.108.0/2410.64.108.1 – 10.64.108.25410.64.108.255
11010.64.109.0/2410.64.109.1 – 10.64.109.25410.64.109.255
11110.64.110.0/2410.64.110.1 – 10.64.110.25410.64.110.255
11210.64.111.0/2410.64.111.1 – 10.64.111.25410.64.111.255
11310.64.112.0/2410.64.112.1 – 10.64.112.25410.64.112.255
11410.64.113.0/2410.64.113.1 – 10.64.113.25410.64.113.255
11510.64.114.0/2410.64.114.1 – 10.64.114.25410.64.114.255
11610.64.115.0/2410.64.115.1 – 10.64.115.25410.64.115.255
11710.64.116.0/2410.64.116.1 – 10.64.116.25410.64.116.255
11810.64.117.0/2410.64.117.1 – 10.64.117.25410.64.117.255
11910.64.118.0/2410.64.118.1 – 10.64.118.25410.64.118.255
12010.64.119.0/2410.64.119.1 – 10.64.119.25410.64.119.255
12110.64.120.0/2410.64.120.1 – 10.64.120.25410.64.120.255
12210.64.121.0/2410.64.121.1 – 10.64.121.25410.64.121.255
12310.64.122.0/2410.64.122.1 – 10.64.122.25410.64.122.255
12410.64.123.0/2410.64.123.1 – 10.64.123.25410.64.123.255
12510.64.124.0/2410.64.124.1 – 10.64.124.25410.64.124.255
12610.64.125.0/2410.64.125.1 – 10.64.125.25410.64.125.255
12710.64.126.0/2410.64.126.1 – 10.64.126.25410.64.126.255
12810.64.127.0/2410.64.127.1 – 10.64.127.25410.64.127.255
01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /17
/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-
/17255.255.128.032,76832,7661
/18255.255.192.016,38416,3822 split →
/19255.255.224.08,1928,1904 split →
/20255.255.240.04,0964,0948 split →
/21255.255.248.02,0482,04616 split →
/22255.255.252.01,0241,02232 split →
/23255.255.254.051251064 split →
/24255.255.255.0256254128 split →
/25255.255.255.128128126256 split →
/26255.255.255.1926462512 split →
/27255.255.255.22432301,024 split →
/28255.255.255.24016142,048 split →
/29255.255.255.248864,096 split →
/30255.255.255.252428,192 split →
/31255.255.255.2542216,384 split →
/32255.255.255.2551132,768 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 →