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)10.68.0.0/17
network10.68.0.0/17
broadcast10.68.127.255
first host10.68.0.1
last host10.68.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.68.0.0/17
address00001010.01000100.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01000100.00000000.00000000
broadcast00001010.01000100.01111111.11111111
green = network part, grey = host part
hex0x0a440000
decimal172228608
reverse dns0.0.68.10.in-addr.arpa
ipv4-mapped::ffff:a44:0

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.68.0.0/2410.68.0.1 – 10.68.0.25410.68.0.255
210.68.1.0/2410.68.1.1 – 10.68.1.25410.68.1.255
310.68.2.0/2410.68.2.1 – 10.68.2.25410.68.2.255
410.68.3.0/2410.68.3.1 – 10.68.3.25410.68.3.255
510.68.4.0/2410.68.4.1 – 10.68.4.25410.68.4.255
610.68.5.0/2410.68.5.1 – 10.68.5.25410.68.5.255
710.68.6.0/2410.68.6.1 – 10.68.6.25410.68.6.255
810.68.7.0/2410.68.7.1 – 10.68.7.25410.68.7.255
910.68.8.0/2410.68.8.1 – 10.68.8.25410.68.8.255
1010.68.9.0/2410.68.9.1 – 10.68.9.25410.68.9.255
1110.68.10.0/2410.68.10.1 – 10.68.10.25410.68.10.255
1210.68.11.0/2410.68.11.1 – 10.68.11.25410.68.11.255
1310.68.12.0/2410.68.12.1 – 10.68.12.25410.68.12.255
1410.68.13.0/2410.68.13.1 – 10.68.13.25410.68.13.255
1510.68.14.0/2410.68.14.1 – 10.68.14.25410.68.14.255
1610.68.15.0/2410.68.15.1 – 10.68.15.25410.68.15.255
1710.68.16.0/2410.68.16.1 – 10.68.16.25410.68.16.255
1810.68.17.0/2410.68.17.1 – 10.68.17.25410.68.17.255
1910.68.18.0/2410.68.18.1 – 10.68.18.25410.68.18.255
2010.68.19.0/2410.68.19.1 – 10.68.19.25410.68.19.255
2110.68.20.0/2410.68.20.1 – 10.68.20.25410.68.20.255
2210.68.21.0/2410.68.21.1 – 10.68.21.25410.68.21.255
2310.68.22.0/2410.68.22.1 – 10.68.22.25410.68.22.255
2410.68.23.0/2410.68.23.1 – 10.68.23.25410.68.23.255
2510.68.24.0/2410.68.24.1 – 10.68.24.25410.68.24.255
2610.68.25.0/2410.68.25.1 – 10.68.25.25410.68.25.255
2710.68.26.0/2410.68.26.1 – 10.68.26.25410.68.26.255
2810.68.27.0/2410.68.27.1 – 10.68.27.25410.68.27.255
2910.68.28.0/2410.68.28.1 – 10.68.28.25410.68.28.255
3010.68.29.0/2410.68.29.1 – 10.68.29.25410.68.29.255
3110.68.30.0/2410.68.30.1 – 10.68.30.25410.68.30.255
3210.68.31.0/2410.68.31.1 – 10.68.31.25410.68.31.255
3310.68.32.0/2410.68.32.1 – 10.68.32.25410.68.32.255
3410.68.33.0/2410.68.33.1 – 10.68.33.25410.68.33.255
3510.68.34.0/2410.68.34.1 – 10.68.34.25410.68.34.255
3610.68.35.0/2410.68.35.1 – 10.68.35.25410.68.35.255
3710.68.36.0/2410.68.36.1 – 10.68.36.25410.68.36.255
3810.68.37.0/2410.68.37.1 – 10.68.37.25410.68.37.255
3910.68.38.0/2410.68.38.1 – 10.68.38.25410.68.38.255
4010.68.39.0/2410.68.39.1 – 10.68.39.25410.68.39.255
4110.68.40.0/2410.68.40.1 – 10.68.40.25410.68.40.255
4210.68.41.0/2410.68.41.1 – 10.68.41.25410.68.41.255
4310.68.42.0/2410.68.42.1 – 10.68.42.25410.68.42.255
4410.68.43.0/2410.68.43.1 – 10.68.43.25410.68.43.255
4510.68.44.0/2410.68.44.1 – 10.68.44.25410.68.44.255
4610.68.45.0/2410.68.45.1 – 10.68.45.25410.68.45.255
4710.68.46.0/2410.68.46.1 – 10.68.46.25410.68.46.255
4810.68.47.0/2410.68.47.1 – 10.68.47.25410.68.47.255
4910.68.48.0/2410.68.48.1 – 10.68.48.25410.68.48.255
5010.68.49.0/2410.68.49.1 – 10.68.49.25410.68.49.255
5110.68.50.0/2410.68.50.1 – 10.68.50.25410.68.50.255
5210.68.51.0/2410.68.51.1 – 10.68.51.25410.68.51.255
5310.68.52.0/2410.68.52.1 – 10.68.52.25410.68.52.255
5410.68.53.0/2410.68.53.1 – 10.68.53.25410.68.53.255
5510.68.54.0/2410.68.54.1 – 10.68.54.25410.68.54.255
5610.68.55.0/2410.68.55.1 – 10.68.55.25410.68.55.255
5710.68.56.0/2410.68.56.1 – 10.68.56.25410.68.56.255
5810.68.57.0/2410.68.57.1 – 10.68.57.25410.68.57.255
5910.68.58.0/2410.68.58.1 – 10.68.58.25410.68.58.255
6010.68.59.0/2410.68.59.1 – 10.68.59.25410.68.59.255
6110.68.60.0/2410.68.60.1 – 10.68.60.25410.68.60.255
6210.68.61.0/2410.68.61.1 – 10.68.61.25410.68.61.255
6310.68.62.0/2410.68.62.1 – 10.68.62.25410.68.62.255
6410.68.63.0/2410.68.63.1 – 10.68.63.25410.68.63.255
6510.68.64.0/2410.68.64.1 – 10.68.64.25410.68.64.255
6610.68.65.0/2410.68.65.1 – 10.68.65.25410.68.65.255
6710.68.66.0/2410.68.66.1 – 10.68.66.25410.68.66.255
6810.68.67.0/2410.68.67.1 – 10.68.67.25410.68.67.255
6910.68.68.0/2410.68.68.1 – 10.68.68.25410.68.68.255
7010.68.69.0/2410.68.69.1 – 10.68.69.25410.68.69.255
7110.68.70.0/2410.68.70.1 – 10.68.70.25410.68.70.255
7210.68.71.0/2410.68.71.1 – 10.68.71.25410.68.71.255
7310.68.72.0/2410.68.72.1 – 10.68.72.25410.68.72.255
7410.68.73.0/2410.68.73.1 – 10.68.73.25410.68.73.255
7510.68.74.0/2410.68.74.1 – 10.68.74.25410.68.74.255
7610.68.75.0/2410.68.75.1 – 10.68.75.25410.68.75.255
7710.68.76.0/2410.68.76.1 – 10.68.76.25410.68.76.255
7810.68.77.0/2410.68.77.1 – 10.68.77.25410.68.77.255
7910.68.78.0/2410.68.78.1 – 10.68.78.25410.68.78.255
8010.68.79.0/2410.68.79.1 – 10.68.79.25410.68.79.255
8110.68.80.0/2410.68.80.1 – 10.68.80.25410.68.80.255
8210.68.81.0/2410.68.81.1 – 10.68.81.25410.68.81.255
8310.68.82.0/2410.68.82.1 – 10.68.82.25410.68.82.255
8410.68.83.0/2410.68.83.1 – 10.68.83.25410.68.83.255
8510.68.84.0/2410.68.84.1 – 10.68.84.25410.68.84.255
8610.68.85.0/2410.68.85.1 – 10.68.85.25410.68.85.255
8710.68.86.0/2410.68.86.1 – 10.68.86.25410.68.86.255
8810.68.87.0/2410.68.87.1 – 10.68.87.25410.68.87.255
8910.68.88.0/2410.68.88.1 – 10.68.88.25410.68.88.255
9010.68.89.0/2410.68.89.1 – 10.68.89.25410.68.89.255
9110.68.90.0/2410.68.90.1 – 10.68.90.25410.68.90.255
9210.68.91.0/2410.68.91.1 – 10.68.91.25410.68.91.255
9310.68.92.0/2410.68.92.1 – 10.68.92.25410.68.92.255
9410.68.93.0/2410.68.93.1 – 10.68.93.25410.68.93.255
9510.68.94.0/2410.68.94.1 – 10.68.94.25410.68.94.255
9610.68.95.0/2410.68.95.1 – 10.68.95.25410.68.95.255
9710.68.96.0/2410.68.96.1 – 10.68.96.25410.68.96.255
9810.68.97.0/2410.68.97.1 – 10.68.97.25410.68.97.255
9910.68.98.0/2410.68.98.1 – 10.68.98.25410.68.98.255
10010.68.99.0/2410.68.99.1 – 10.68.99.25410.68.99.255
10110.68.100.0/2410.68.100.1 – 10.68.100.25410.68.100.255
10210.68.101.0/2410.68.101.1 – 10.68.101.25410.68.101.255
10310.68.102.0/2410.68.102.1 – 10.68.102.25410.68.102.255
10410.68.103.0/2410.68.103.1 – 10.68.103.25410.68.103.255
10510.68.104.0/2410.68.104.1 – 10.68.104.25410.68.104.255
10610.68.105.0/2410.68.105.1 – 10.68.105.25410.68.105.255
10710.68.106.0/2410.68.106.1 – 10.68.106.25410.68.106.255
10810.68.107.0/2410.68.107.1 – 10.68.107.25410.68.107.255
10910.68.108.0/2410.68.108.1 – 10.68.108.25410.68.108.255
11010.68.109.0/2410.68.109.1 – 10.68.109.25410.68.109.255
11110.68.110.0/2410.68.110.1 – 10.68.110.25410.68.110.255
11210.68.111.0/2410.68.111.1 – 10.68.111.25410.68.111.255
11310.68.112.0/2410.68.112.1 – 10.68.112.25410.68.112.255
11410.68.113.0/2410.68.113.1 – 10.68.113.25410.68.113.255
11510.68.114.0/2410.68.114.1 – 10.68.114.25410.68.114.255
11610.68.115.0/2410.68.115.1 – 10.68.115.25410.68.115.255
11710.68.116.0/2410.68.116.1 – 10.68.116.25410.68.116.255
11810.68.117.0/2410.68.117.1 – 10.68.117.25410.68.117.255
11910.68.118.0/2410.68.118.1 – 10.68.118.25410.68.118.255
12010.68.119.0/2410.68.119.1 – 10.68.119.25410.68.119.255
12110.68.120.0/2410.68.120.1 – 10.68.120.25410.68.120.255
12210.68.121.0/2410.68.121.1 – 10.68.121.25410.68.121.255
12310.68.122.0/2410.68.122.1 – 10.68.122.25410.68.122.255
12410.68.123.0/2410.68.123.1 – 10.68.123.25410.68.123.255
12510.68.124.0/2410.68.124.1 – 10.68.124.25410.68.124.255
12610.68.125.0/2410.68.125.1 – 10.68.125.25410.68.125.255
12710.68.126.0/2410.68.126.1 – 10.68.126.25410.68.126.255
12810.68.127.0/2410.68.127.1 – 10.68.127.25410.68.127.255
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 →