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)10.17.0.0/17
network10.17.0.0/17
broadcast10.17.127.255
first host10.17.0.1
last host10.17.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.17.0.0/17
address00001010.00010001.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.00010001.00000000.00000000
broadcast00001010.00010001.01111111.11111111
green = network part, grey = host part
hex0x0a110000
decimal168886272
reverse dns0.0.17.10.in-addr.arpa
ipv4-mapped::ffff:a11:0

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.17.0.0/2410.17.0.1 – 10.17.0.25410.17.0.255
210.17.1.0/2410.17.1.1 – 10.17.1.25410.17.1.255
310.17.2.0/2410.17.2.1 – 10.17.2.25410.17.2.255
410.17.3.0/2410.17.3.1 – 10.17.3.25410.17.3.255
510.17.4.0/2410.17.4.1 – 10.17.4.25410.17.4.255
610.17.5.0/2410.17.5.1 – 10.17.5.25410.17.5.255
710.17.6.0/2410.17.6.1 – 10.17.6.25410.17.6.255
810.17.7.0/2410.17.7.1 – 10.17.7.25410.17.7.255
910.17.8.0/2410.17.8.1 – 10.17.8.25410.17.8.255
1010.17.9.0/2410.17.9.1 – 10.17.9.25410.17.9.255
1110.17.10.0/2410.17.10.1 – 10.17.10.25410.17.10.255
1210.17.11.0/2410.17.11.1 – 10.17.11.25410.17.11.255
1310.17.12.0/2410.17.12.1 – 10.17.12.25410.17.12.255
1410.17.13.0/2410.17.13.1 – 10.17.13.25410.17.13.255
1510.17.14.0/2410.17.14.1 – 10.17.14.25410.17.14.255
1610.17.15.0/2410.17.15.1 – 10.17.15.25410.17.15.255
1710.17.16.0/2410.17.16.1 – 10.17.16.25410.17.16.255
1810.17.17.0/2410.17.17.1 – 10.17.17.25410.17.17.255
1910.17.18.0/2410.17.18.1 – 10.17.18.25410.17.18.255
2010.17.19.0/2410.17.19.1 – 10.17.19.25410.17.19.255
2110.17.20.0/2410.17.20.1 – 10.17.20.25410.17.20.255
2210.17.21.0/2410.17.21.1 – 10.17.21.25410.17.21.255
2310.17.22.0/2410.17.22.1 – 10.17.22.25410.17.22.255
2410.17.23.0/2410.17.23.1 – 10.17.23.25410.17.23.255
2510.17.24.0/2410.17.24.1 – 10.17.24.25410.17.24.255
2610.17.25.0/2410.17.25.1 – 10.17.25.25410.17.25.255
2710.17.26.0/2410.17.26.1 – 10.17.26.25410.17.26.255
2810.17.27.0/2410.17.27.1 – 10.17.27.25410.17.27.255
2910.17.28.0/2410.17.28.1 – 10.17.28.25410.17.28.255
3010.17.29.0/2410.17.29.1 – 10.17.29.25410.17.29.255
3110.17.30.0/2410.17.30.1 – 10.17.30.25410.17.30.255
3210.17.31.0/2410.17.31.1 – 10.17.31.25410.17.31.255
3310.17.32.0/2410.17.32.1 – 10.17.32.25410.17.32.255
3410.17.33.0/2410.17.33.1 – 10.17.33.25410.17.33.255
3510.17.34.0/2410.17.34.1 – 10.17.34.25410.17.34.255
3610.17.35.0/2410.17.35.1 – 10.17.35.25410.17.35.255
3710.17.36.0/2410.17.36.1 – 10.17.36.25410.17.36.255
3810.17.37.0/2410.17.37.1 – 10.17.37.25410.17.37.255
3910.17.38.0/2410.17.38.1 – 10.17.38.25410.17.38.255
4010.17.39.0/2410.17.39.1 – 10.17.39.25410.17.39.255
4110.17.40.0/2410.17.40.1 – 10.17.40.25410.17.40.255
4210.17.41.0/2410.17.41.1 – 10.17.41.25410.17.41.255
4310.17.42.0/2410.17.42.1 – 10.17.42.25410.17.42.255
4410.17.43.0/2410.17.43.1 – 10.17.43.25410.17.43.255
4510.17.44.0/2410.17.44.1 – 10.17.44.25410.17.44.255
4610.17.45.0/2410.17.45.1 – 10.17.45.25410.17.45.255
4710.17.46.0/2410.17.46.1 – 10.17.46.25410.17.46.255
4810.17.47.0/2410.17.47.1 – 10.17.47.25410.17.47.255
4910.17.48.0/2410.17.48.1 – 10.17.48.25410.17.48.255
5010.17.49.0/2410.17.49.1 – 10.17.49.25410.17.49.255
5110.17.50.0/2410.17.50.1 – 10.17.50.25410.17.50.255
5210.17.51.0/2410.17.51.1 – 10.17.51.25410.17.51.255
5310.17.52.0/2410.17.52.1 – 10.17.52.25410.17.52.255
5410.17.53.0/2410.17.53.1 – 10.17.53.25410.17.53.255
5510.17.54.0/2410.17.54.1 – 10.17.54.25410.17.54.255
5610.17.55.0/2410.17.55.1 – 10.17.55.25410.17.55.255
5710.17.56.0/2410.17.56.1 – 10.17.56.25410.17.56.255
5810.17.57.0/2410.17.57.1 – 10.17.57.25410.17.57.255
5910.17.58.0/2410.17.58.1 – 10.17.58.25410.17.58.255
6010.17.59.0/2410.17.59.1 – 10.17.59.25410.17.59.255
6110.17.60.0/2410.17.60.1 – 10.17.60.25410.17.60.255
6210.17.61.0/2410.17.61.1 – 10.17.61.25410.17.61.255
6310.17.62.0/2410.17.62.1 – 10.17.62.25410.17.62.255
6410.17.63.0/2410.17.63.1 – 10.17.63.25410.17.63.255
6510.17.64.0/2410.17.64.1 – 10.17.64.25410.17.64.255
6610.17.65.0/2410.17.65.1 – 10.17.65.25410.17.65.255
6710.17.66.0/2410.17.66.1 – 10.17.66.25410.17.66.255
6810.17.67.0/2410.17.67.1 – 10.17.67.25410.17.67.255
6910.17.68.0/2410.17.68.1 – 10.17.68.25410.17.68.255
7010.17.69.0/2410.17.69.1 – 10.17.69.25410.17.69.255
7110.17.70.0/2410.17.70.1 – 10.17.70.25410.17.70.255
7210.17.71.0/2410.17.71.1 – 10.17.71.25410.17.71.255
7310.17.72.0/2410.17.72.1 – 10.17.72.25410.17.72.255
7410.17.73.0/2410.17.73.1 – 10.17.73.25410.17.73.255
7510.17.74.0/2410.17.74.1 – 10.17.74.25410.17.74.255
7610.17.75.0/2410.17.75.1 – 10.17.75.25410.17.75.255
7710.17.76.0/2410.17.76.1 – 10.17.76.25410.17.76.255
7810.17.77.0/2410.17.77.1 – 10.17.77.25410.17.77.255
7910.17.78.0/2410.17.78.1 – 10.17.78.25410.17.78.255
8010.17.79.0/2410.17.79.1 – 10.17.79.25410.17.79.255
8110.17.80.0/2410.17.80.1 – 10.17.80.25410.17.80.255
8210.17.81.0/2410.17.81.1 – 10.17.81.25410.17.81.255
8310.17.82.0/2410.17.82.1 – 10.17.82.25410.17.82.255
8410.17.83.0/2410.17.83.1 – 10.17.83.25410.17.83.255
8510.17.84.0/2410.17.84.1 – 10.17.84.25410.17.84.255
8610.17.85.0/2410.17.85.1 – 10.17.85.25410.17.85.255
8710.17.86.0/2410.17.86.1 – 10.17.86.25410.17.86.255
8810.17.87.0/2410.17.87.1 – 10.17.87.25410.17.87.255
8910.17.88.0/2410.17.88.1 – 10.17.88.25410.17.88.255
9010.17.89.0/2410.17.89.1 – 10.17.89.25410.17.89.255
9110.17.90.0/2410.17.90.1 – 10.17.90.25410.17.90.255
9210.17.91.0/2410.17.91.1 – 10.17.91.25410.17.91.255
9310.17.92.0/2410.17.92.1 – 10.17.92.25410.17.92.255
9410.17.93.0/2410.17.93.1 – 10.17.93.25410.17.93.255
9510.17.94.0/2410.17.94.1 – 10.17.94.25410.17.94.255
9610.17.95.0/2410.17.95.1 – 10.17.95.25410.17.95.255
9710.17.96.0/2410.17.96.1 – 10.17.96.25410.17.96.255
9810.17.97.0/2410.17.97.1 – 10.17.97.25410.17.97.255
9910.17.98.0/2410.17.98.1 – 10.17.98.25410.17.98.255
10010.17.99.0/2410.17.99.1 – 10.17.99.25410.17.99.255
10110.17.100.0/2410.17.100.1 – 10.17.100.25410.17.100.255
10210.17.101.0/2410.17.101.1 – 10.17.101.25410.17.101.255
10310.17.102.0/2410.17.102.1 – 10.17.102.25410.17.102.255
10410.17.103.0/2410.17.103.1 – 10.17.103.25410.17.103.255
10510.17.104.0/2410.17.104.1 – 10.17.104.25410.17.104.255
10610.17.105.0/2410.17.105.1 – 10.17.105.25410.17.105.255
10710.17.106.0/2410.17.106.1 – 10.17.106.25410.17.106.255
10810.17.107.0/2410.17.107.1 – 10.17.107.25410.17.107.255
10910.17.108.0/2410.17.108.1 – 10.17.108.25410.17.108.255
11010.17.109.0/2410.17.109.1 – 10.17.109.25410.17.109.255
11110.17.110.0/2410.17.110.1 – 10.17.110.25410.17.110.255
11210.17.111.0/2410.17.111.1 – 10.17.111.25410.17.111.255
11310.17.112.0/2410.17.112.1 – 10.17.112.25410.17.112.255
11410.17.113.0/2410.17.113.1 – 10.17.113.25410.17.113.255
11510.17.114.0/2410.17.114.1 – 10.17.114.25410.17.114.255
11610.17.115.0/2410.17.115.1 – 10.17.115.25410.17.115.255
11710.17.116.0/2410.17.116.1 – 10.17.116.25410.17.116.255
11810.17.117.0/2410.17.117.1 – 10.17.117.25410.17.117.255
11910.17.118.0/2410.17.118.1 – 10.17.118.25410.17.118.255
12010.17.119.0/2410.17.119.1 – 10.17.119.25410.17.119.255
12110.17.120.0/2410.17.120.1 – 10.17.120.25410.17.120.255
12210.17.121.0/2410.17.121.1 – 10.17.121.25410.17.121.255
12310.17.122.0/2410.17.122.1 – 10.17.122.25410.17.122.255
12410.17.123.0/2410.17.123.1 – 10.17.123.25410.17.123.255
12510.17.124.0/2410.17.124.1 – 10.17.124.25410.17.124.255
12610.17.125.0/2410.17.125.1 – 10.17.125.25410.17.125.255
12710.17.126.0/2410.17.126.1 – 10.17.126.25410.17.126.255
12810.17.127.0/2410.17.127.1 – 10.17.127.25410.17.127.255
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 →