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)10.115.0.0/17
network10.115.0.0/17
broadcast10.115.127.255
first host10.115.0.1
last host10.115.127.254
subnet mask255.255.128.0
wildcard0.0.127.255
addresses32,768
usable hosts32,766
classA
ipcalc 10.115.0.0/17
address00001010.01110011.00000000.00000000
subnet mask11111111.11111111.10000000.00000000
network00001010.01110011.00000000.00000000
broadcast00001010.01110011.01111111.11111111
green = network part, grey = host part
hex0x0a730000
decimal175308800
reverse dns0.0.115.10.in-addr.arpa
ipv4-mapped::ffff:a73:0

/17 split into /24 · 128 subnets

close ×
#networkhost rangebroadcast
110.115.0.0/2410.115.0.1 – 10.115.0.25410.115.0.255
210.115.1.0/2410.115.1.1 – 10.115.1.25410.115.1.255
310.115.2.0/2410.115.2.1 – 10.115.2.25410.115.2.255
410.115.3.0/2410.115.3.1 – 10.115.3.25410.115.3.255
510.115.4.0/2410.115.4.1 – 10.115.4.25410.115.4.255
610.115.5.0/2410.115.5.1 – 10.115.5.25410.115.5.255
710.115.6.0/2410.115.6.1 – 10.115.6.25410.115.6.255
810.115.7.0/2410.115.7.1 – 10.115.7.25410.115.7.255
910.115.8.0/2410.115.8.1 – 10.115.8.25410.115.8.255
1010.115.9.0/2410.115.9.1 – 10.115.9.25410.115.9.255
1110.115.10.0/2410.115.10.1 – 10.115.10.25410.115.10.255
1210.115.11.0/2410.115.11.1 – 10.115.11.25410.115.11.255
1310.115.12.0/2410.115.12.1 – 10.115.12.25410.115.12.255
1410.115.13.0/2410.115.13.1 – 10.115.13.25410.115.13.255
1510.115.14.0/2410.115.14.1 – 10.115.14.25410.115.14.255
1610.115.15.0/2410.115.15.1 – 10.115.15.25410.115.15.255
1710.115.16.0/2410.115.16.1 – 10.115.16.25410.115.16.255
1810.115.17.0/2410.115.17.1 – 10.115.17.25410.115.17.255
1910.115.18.0/2410.115.18.1 – 10.115.18.25410.115.18.255
2010.115.19.0/2410.115.19.1 – 10.115.19.25410.115.19.255
2110.115.20.0/2410.115.20.1 – 10.115.20.25410.115.20.255
2210.115.21.0/2410.115.21.1 – 10.115.21.25410.115.21.255
2310.115.22.0/2410.115.22.1 – 10.115.22.25410.115.22.255
2410.115.23.0/2410.115.23.1 – 10.115.23.25410.115.23.255
2510.115.24.0/2410.115.24.1 – 10.115.24.25410.115.24.255
2610.115.25.0/2410.115.25.1 – 10.115.25.25410.115.25.255
2710.115.26.0/2410.115.26.1 – 10.115.26.25410.115.26.255
2810.115.27.0/2410.115.27.1 – 10.115.27.25410.115.27.255
2910.115.28.0/2410.115.28.1 – 10.115.28.25410.115.28.255
3010.115.29.0/2410.115.29.1 – 10.115.29.25410.115.29.255
3110.115.30.0/2410.115.30.1 – 10.115.30.25410.115.30.255
3210.115.31.0/2410.115.31.1 – 10.115.31.25410.115.31.255
3310.115.32.0/2410.115.32.1 – 10.115.32.25410.115.32.255
3410.115.33.0/2410.115.33.1 – 10.115.33.25410.115.33.255
3510.115.34.0/2410.115.34.1 – 10.115.34.25410.115.34.255
3610.115.35.0/2410.115.35.1 – 10.115.35.25410.115.35.255
3710.115.36.0/2410.115.36.1 – 10.115.36.25410.115.36.255
3810.115.37.0/2410.115.37.1 – 10.115.37.25410.115.37.255
3910.115.38.0/2410.115.38.1 – 10.115.38.25410.115.38.255
4010.115.39.0/2410.115.39.1 – 10.115.39.25410.115.39.255
4110.115.40.0/2410.115.40.1 – 10.115.40.25410.115.40.255
4210.115.41.0/2410.115.41.1 – 10.115.41.25410.115.41.255
4310.115.42.0/2410.115.42.1 – 10.115.42.25410.115.42.255
4410.115.43.0/2410.115.43.1 – 10.115.43.25410.115.43.255
4510.115.44.0/2410.115.44.1 – 10.115.44.25410.115.44.255
4610.115.45.0/2410.115.45.1 – 10.115.45.25410.115.45.255
4710.115.46.0/2410.115.46.1 – 10.115.46.25410.115.46.255
4810.115.47.0/2410.115.47.1 – 10.115.47.25410.115.47.255
4910.115.48.0/2410.115.48.1 – 10.115.48.25410.115.48.255
5010.115.49.0/2410.115.49.1 – 10.115.49.25410.115.49.255
5110.115.50.0/2410.115.50.1 – 10.115.50.25410.115.50.255
5210.115.51.0/2410.115.51.1 – 10.115.51.25410.115.51.255
5310.115.52.0/2410.115.52.1 – 10.115.52.25410.115.52.255
5410.115.53.0/2410.115.53.1 – 10.115.53.25410.115.53.255
5510.115.54.0/2410.115.54.1 – 10.115.54.25410.115.54.255
5610.115.55.0/2410.115.55.1 – 10.115.55.25410.115.55.255
5710.115.56.0/2410.115.56.1 – 10.115.56.25410.115.56.255
5810.115.57.0/2410.115.57.1 – 10.115.57.25410.115.57.255
5910.115.58.0/2410.115.58.1 – 10.115.58.25410.115.58.255
6010.115.59.0/2410.115.59.1 – 10.115.59.25410.115.59.255
6110.115.60.0/2410.115.60.1 – 10.115.60.25410.115.60.255
6210.115.61.0/2410.115.61.1 – 10.115.61.25410.115.61.255
6310.115.62.0/2410.115.62.1 – 10.115.62.25410.115.62.255
6410.115.63.0/2410.115.63.1 – 10.115.63.25410.115.63.255
6510.115.64.0/2410.115.64.1 – 10.115.64.25410.115.64.255
6610.115.65.0/2410.115.65.1 – 10.115.65.25410.115.65.255
6710.115.66.0/2410.115.66.1 – 10.115.66.25410.115.66.255
6810.115.67.0/2410.115.67.1 – 10.115.67.25410.115.67.255
6910.115.68.0/2410.115.68.1 – 10.115.68.25410.115.68.255
7010.115.69.0/2410.115.69.1 – 10.115.69.25410.115.69.255
7110.115.70.0/2410.115.70.1 – 10.115.70.25410.115.70.255
7210.115.71.0/2410.115.71.1 – 10.115.71.25410.115.71.255
7310.115.72.0/2410.115.72.1 – 10.115.72.25410.115.72.255
7410.115.73.0/2410.115.73.1 – 10.115.73.25410.115.73.255
7510.115.74.0/2410.115.74.1 – 10.115.74.25410.115.74.255
7610.115.75.0/2410.115.75.1 – 10.115.75.25410.115.75.255
7710.115.76.0/2410.115.76.1 – 10.115.76.25410.115.76.255
7810.115.77.0/2410.115.77.1 – 10.115.77.25410.115.77.255
7910.115.78.0/2410.115.78.1 – 10.115.78.25410.115.78.255
8010.115.79.0/2410.115.79.1 – 10.115.79.25410.115.79.255
8110.115.80.0/2410.115.80.1 – 10.115.80.25410.115.80.255
8210.115.81.0/2410.115.81.1 – 10.115.81.25410.115.81.255
8310.115.82.0/2410.115.82.1 – 10.115.82.25410.115.82.255
8410.115.83.0/2410.115.83.1 – 10.115.83.25410.115.83.255
8510.115.84.0/2410.115.84.1 – 10.115.84.25410.115.84.255
8610.115.85.0/2410.115.85.1 – 10.115.85.25410.115.85.255
8710.115.86.0/2410.115.86.1 – 10.115.86.25410.115.86.255
8810.115.87.0/2410.115.87.1 – 10.115.87.25410.115.87.255
8910.115.88.0/2410.115.88.1 – 10.115.88.25410.115.88.255
9010.115.89.0/2410.115.89.1 – 10.115.89.25410.115.89.255
9110.115.90.0/2410.115.90.1 – 10.115.90.25410.115.90.255
9210.115.91.0/2410.115.91.1 – 10.115.91.25410.115.91.255
9310.115.92.0/2410.115.92.1 – 10.115.92.25410.115.92.255
9410.115.93.0/2410.115.93.1 – 10.115.93.25410.115.93.255
9510.115.94.0/2410.115.94.1 – 10.115.94.25410.115.94.255
9610.115.95.0/2410.115.95.1 – 10.115.95.25410.115.95.255
9710.115.96.0/2410.115.96.1 – 10.115.96.25410.115.96.255
9810.115.97.0/2410.115.97.1 – 10.115.97.25410.115.97.255
9910.115.98.0/2410.115.98.1 – 10.115.98.25410.115.98.255
10010.115.99.0/2410.115.99.1 – 10.115.99.25410.115.99.255
10110.115.100.0/2410.115.100.1 – 10.115.100.25410.115.100.255
10210.115.101.0/2410.115.101.1 – 10.115.101.25410.115.101.255
10310.115.102.0/2410.115.102.1 – 10.115.102.25410.115.102.255
10410.115.103.0/2410.115.103.1 – 10.115.103.25410.115.103.255
10510.115.104.0/2410.115.104.1 – 10.115.104.25410.115.104.255
10610.115.105.0/2410.115.105.1 – 10.115.105.25410.115.105.255
10710.115.106.0/2410.115.106.1 – 10.115.106.25410.115.106.255
10810.115.107.0/2410.115.107.1 – 10.115.107.25410.115.107.255
10910.115.108.0/2410.115.108.1 – 10.115.108.25410.115.108.255
11010.115.109.0/2410.115.109.1 – 10.115.109.25410.115.109.255
11110.115.110.0/2410.115.110.1 – 10.115.110.25410.115.110.255
11210.115.111.0/2410.115.111.1 – 10.115.111.25410.115.111.255
11310.115.112.0/2410.115.112.1 – 10.115.112.25410.115.112.255
11410.115.113.0/2410.115.113.1 – 10.115.113.25410.115.113.255
11510.115.114.0/2410.115.114.1 – 10.115.114.25410.115.114.255
11610.115.115.0/2410.115.115.1 – 10.115.115.25410.115.115.255
11710.115.116.0/2410.115.116.1 – 10.115.116.25410.115.116.255
11810.115.117.0/2410.115.117.1 – 10.115.117.25410.115.117.255
11910.115.118.0/2410.115.118.1 – 10.115.118.25410.115.118.255
12010.115.119.0/2410.115.119.1 – 10.115.119.25410.115.119.255
12110.115.120.0/2410.115.120.1 – 10.115.120.25410.115.120.255
12210.115.121.0/2410.115.121.1 – 10.115.121.25410.115.121.255
12310.115.122.0/2410.115.122.1 – 10.115.122.25410.115.122.255
12410.115.123.0/2410.115.123.1 – 10.115.123.25410.115.123.255
12510.115.124.0/2410.115.124.1 – 10.115.124.25410.115.124.255
12610.115.125.0/2410.115.125.1 – 10.115.125.25410.115.125.255
12710.115.126.0/2410.115.126.1 – 10.115.126.25410.115.126.255
12810.115.127.0/2410.115.127.1 – 10.115.127.25410.115.127.255
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 →