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)10.72.0.0/13
network10.72.0.0/13
broadcast10.79.255.255
first host10.72.0.1
last host10.79.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.72.0.0/13
address00001010.01001000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.01001000.00000000.00000000
broadcast00001010.01001111.11111111.11111111
green = network part, grey = host part
hex0x0a480000
decimal172490752
reverse dns0.0.72.10.in-addr.arpa
ipv4-mapped::ffff:a48:0

/13 split into /25 · 4,096 subnets

close ×
#networkhost rangebroadcast
110.72.0.0/2510.72.0.1 – 10.72.0.12610.72.0.127
210.72.0.128/2510.72.0.129 – 10.72.0.25410.72.0.255
310.72.1.0/2510.72.1.1 – 10.72.1.12610.72.1.127
410.72.1.128/2510.72.1.129 – 10.72.1.25410.72.1.255
510.72.2.0/2510.72.2.1 – 10.72.2.12610.72.2.127
610.72.2.128/2510.72.2.129 – 10.72.2.25410.72.2.255
710.72.3.0/2510.72.3.1 – 10.72.3.12610.72.3.127
810.72.3.128/2510.72.3.129 – 10.72.3.25410.72.3.255
910.72.4.0/2510.72.4.1 – 10.72.4.12610.72.4.127
1010.72.4.128/2510.72.4.129 – 10.72.4.25410.72.4.255
1110.72.5.0/2510.72.5.1 – 10.72.5.12610.72.5.127
1210.72.5.128/2510.72.5.129 – 10.72.5.25410.72.5.255
1310.72.6.0/2510.72.6.1 – 10.72.6.12610.72.6.127
1410.72.6.128/2510.72.6.129 – 10.72.6.25410.72.6.255
1510.72.7.0/2510.72.7.1 – 10.72.7.12610.72.7.127
1610.72.7.128/2510.72.7.129 – 10.72.7.25410.72.7.255
1710.72.8.0/2510.72.8.1 – 10.72.8.12610.72.8.127
1810.72.8.128/2510.72.8.129 – 10.72.8.25410.72.8.255
1910.72.9.0/2510.72.9.1 – 10.72.9.12610.72.9.127
2010.72.9.128/2510.72.9.129 – 10.72.9.25410.72.9.255
2110.72.10.0/2510.72.10.1 – 10.72.10.12610.72.10.127
2210.72.10.128/2510.72.10.129 – 10.72.10.25410.72.10.255
2310.72.11.0/2510.72.11.1 – 10.72.11.12610.72.11.127
2410.72.11.128/2510.72.11.129 – 10.72.11.25410.72.11.255
2510.72.12.0/2510.72.12.1 – 10.72.12.12610.72.12.127
2610.72.12.128/2510.72.12.129 – 10.72.12.25410.72.12.255
2710.72.13.0/2510.72.13.1 – 10.72.13.12610.72.13.127
2810.72.13.128/2510.72.13.129 – 10.72.13.25410.72.13.255
2910.72.14.0/2510.72.14.1 – 10.72.14.12610.72.14.127
3010.72.14.128/2510.72.14.129 – 10.72.14.25410.72.14.255
3110.72.15.0/2510.72.15.1 – 10.72.15.12610.72.15.127
3210.72.15.128/2510.72.15.129 – 10.72.15.25410.72.15.255
3310.72.16.0/2510.72.16.1 – 10.72.16.12610.72.16.127
3410.72.16.128/2510.72.16.129 – 10.72.16.25410.72.16.255
3510.72.17.0/2510.72.17.1 – 10.72.17.12610.72.17.127
3610.72.17.128/2510.72.17.129 – 10.72.17.25410.72.17.255
3710.72.18.0/2510.72.18.1 – 10.72.18.12610.72.18.127
3810.72.18.128/2510.72.18.129 – 10.72.18.25410.72.18.255
3910.72.19.0/2510.72.19.1 – 10.72.19.12610.72.19.127
4010.72.19.128/2510.72.19.129 – 10.72.19.25410.72.19.255
4110.72.20.0/2510.72.20.1 – 10.72.20.12610.72.20.127
4210.72.20.128/2510.72.20.129 – 10.72.20.25410.72.20.255
4310.72.21.0/2510.72.21.1 – 10.72.21.12610.72.21.127
4410.72.21.128/2510.72.21.129 – 10.72.21.25410.72.21.255
4510.72.22.0/2510.72.22.1 – 10.72.22.12610.72.22.127
4610.72.22.128/2510.72.22.129 – 10.72.22.25410.72.22.255
4710.72.23.0/2510.72.23.1 – 10.72.23.12610.72.23.127
4810.72.23.128/2510.72.23.129 – 10.72.23.25410.72.23.255
4910.72.24.0/2510.72.24.1 – 10.72.24.12610.72.24.127
5010.72.24.128/2510.72.24.129 – 10.72.24.25410.72.24.255
5110.72.25.0/2510.72.25.1 – 10.72.25.12610.72.25.127
5210.72.25.128/2510.72.25.129 – 10.72.25.25410.72.25.255
5310.72.26.0/2510.72.26.1 – 10.72.26.12610.72.26.127
5410.72.26.128/2510.72.26.129 – 10.72.26.25410.72.26.255
5510.72.27.0/2510.72.27.1 – 10.72.27.12610.72.27.127
5610.72.27.128/2510.72.27.129 – 10.72.27.25410.72.27.255
5710.72.28.0/2510.72.28.1 – 10.72.28.12610.72.28.127
5810.72.28.128/2510.72.28.129 – 10.72.28.25410.72.28.255
5910.72.29.0/2510.72.29.1 – 10.72.29.12610.72.29.127
6010.72.29.128/2510.72.29.129 – 10.72.29.25410.72.29.255
6110.72.30.0/2510.72.30.1 – 10.72.30.12610.72.30.127
6210.72.30.128/2510.72.30.129 – 10.72.30.25410.72.30.255
6310.72.31.0/2510.72.31.1 – 10.72.31.12610.72.31.127
6410.72.31.128/2510.72.31.129 – 10.72.31.25410.72.31.255
6510.72.32.0/2510.72.32.1 – 10.72.32.12610.72.32.127
6610.72.32.128/2510.72.32.129 – 10.72.32.25410.72.32.255
6710.72.33.0/2510.72.33.1 – 10.72.33.12610.72.33.127
6810.72.33.128/2510.72.33.129 – 10.72.33.25410.72.33.255
6910.72.34.0/2510.72.34.1 – 10.72.34.12610.72.34.127
7010.72.34.128/2510.72.34.129 – 10.72.34.25410.72.34.255
7110.72.35.0/2510.72.35.1 – 10.72.35.12610.72.35.127
7210.72.35.128/2510.72.35.129 – 10.72.35.25410.72.35.255
7310.72.36.0/2510.72.36.1 – 10.72.36.12610.72.36.127
7410.72.36.128/2510.72.36.129 – 10.72.36.25410.72.36.255
7510.72.37.0/2510.72.37.1 – 10.72.37.12610.72.37.127
7610.72.37.128/2510.72.37.129 – 10.72.37.25410.72.37.255
7710.72.38.0/2510.72.38.1 – 10.72.38.12610.72.38.127
7810.72.38.128/2510.72.38.129 – 10.72.38.25410.72.38.255
7910.72.39.0/2510.72.39.1 – 10.72.39.12610.72.39.127
8010.72.39.128/2510.72.39.129 – 10.72.39.25410.72.39.255
8110.72.40.0/2510.72.40.1 – 10.72.40.12610.72.40.127
8210.72.40.128/2510.72.40.129 – 10.72.40.25410.72.40.255
8310.72.41.0/2510.72.41.1 – 10.72.41.12610.72.41.127
8410.72.41.128/2510.72.41.129 – 10.72.41.25410.72.41.255
8510.72.42.0/2510.72.42.1 – 10.72.42.12610.72.42.127
8610.72.42.128/2510.72.42.129 – 10.72.42.25410.72.42.255
8710.72.43.0/2510.72.43.1 – 10.72.43.12610.72.43.127
8810.72.43.128/2510.72.43.129 – 10.72.43.25410.72.43.255
8910.72.44.0/2510.72.44.1 – 10.72.44.12610.72.44.127
9010.72.44.128/2510.72.44.129 – 10.72.44.25410.72.44.255
9110.72.45.0/2510.72.45.1 – 10.72.45.12610.72.45.127
9210.72.45.128/2510.72.45.129 – 10.72.45.25410.72.45.255
9310.72.46.0/2510.72.46.1 – 10.72.46.12610.72.46.127
9410.72.46.128/2510.72.46.129 – 10.72.46.25410.72.46.255
9510.72.47.0/2510.72.47.1 – 10.72.47.12610.72.47.127
9610.72.47.128/2510.72.47.129 – 10.72.47.25410.72.47.255
9710.72.48.0/2510.72.48.1 – 10.72.48.12610.72.48.127
9810.72.48.128/2510.72.48.129 – 10.72.48.25410.72.48.255
9910.72.49.0/2510.72.49.1 – 10.72.49.12610.72.49.127
10010.72.49.128/2510.72.49.129 – 10.72.49.25410.72.49.255
10110.72.50.0/2510.72.50.1 – 10.72.50.12610.72.50.127
10210.72.50.128/2510.72.50.129 – 10.72.50.25410.72.50.255
10310.72.51.0/2510.72.51.1 – 10.72.51.12610.72.51.127
10410.72.51.128/2510.72.51.129 – 10.72.51.25410.72.51.255
10510.72.52.0/2510.72.52.1 – 10.72.52.12610.72.52.127
10610.72.52.128/2510.72.52.129 – 10.72.52.25410.72.52.255
10710.72.53.0/2510.72.53.1 – 10.72.53.12610.72.53.127
10810.72.53.128/2510.72.53.129 – 10.72.53.25410.72.53.255
10910.72.54.0/2510.72.54.1 – 10.72.54.12610.72.54.127
11010.72.54.128/2510.72.54.129 – 10.72.54.25410.72.54.255
11110.72.55.0/2510.72.55.1 – 10.72.55.12610.72.55.127
11210.72.55.128/2510.72.55.129 – 10.72.55.25410.72.55.255
11310.72.56.0/2510.72.56.1 – 10.72.56.12610.72.56.127
11410.72.56.128/2510.72.56.129 – 10.72.56.25410.72.56.255
11510.72.57.0/2510.72.57.1 – 10.72.57.12610.72.57.127
11610.72.57.128/2510.72.57.129 – 10.72.57.25410.72.57.255
11710.72.58.0/2510.72.58.1 – 10.72.58.12610.72.58.127
11810.72.58.128/2510.72.58.129 – 10.72.58.25410.72.58.255
11910.72.59.0/2510.72.59.1 – 10.72.59.12610.72.59.127
12010.72.59.128/2510.72.59.129 – 10.72.59.25410.72.59.255
12110.72.60.0/2510.72.60.1 – 10.72.60.12610.72.60.127
12210.72.60.128/2510.72.60.129 – 10.72.60.25410.72.60.255
12310.72.61.0/2510.72.61.1 – 10.72.61.12610.72.61.127
12410.72.61.128/2510.72.61.129 – 10.72.61.25410.72.61.255
12510.72.62.0/2510.72.62.1 – 10.72.62.12610.72.62.127
12610.72.62.128/2510.72.62.129 – 10.72.62.25410.72.62.255
12710.72.63.0/2510.72.63.1 – 10.72.63.12610.72.63.127
12810.72.63.128/2510.72.63.129 – 10.72.63.25410.72.63.255
12910.72.64.0/2510.72.64.1 – 10.72.64.12610.72.64.127
13010.72.64.128/2510.72.64.129 – 10.72.64.25410.72.64.255
13110.72.65.0/2510.72.65.1 – 10.72.65.12610.72.65.127
13210.72.65.128/2510.72.65.129 – 10.72.65.25410.72.65.255
13310.72.66.0/2510.72.66.1 – 10.72.66.12610.72.66.127
13410.72.66.128/2510.72.66.129 – 10.72.66.25410.72.66.255
13510.72.67.0/2510.72.67.1 – 10.72.67.12610.72.67.127
13610.72.67.128/2510.72.67.129 – 10.72.67.25410.72.67.255
13710.72.68.0/2510.72.68.1 – 10.72.68.12610.72.68.127
13810.72.68.128/2510.72.68.129 – 10.72.68.25410.72.68.255
13910.72.69.0/2510.72.69.1 – 10.72.69.12610.72.69.127
14010.72.69.128/2510.72.69.129 – 10.72.69.25410.72.69.255
14110.72.70.0/2510.72.70.1 – 10.72.70.12610.72.70.127
14210.72.70.128/2510.72.70.129 – 10.72.70.25410.72.70.255
14310.72.71.0/2510.72.71.1 – 10.72.71.12610.72.71.127
14410.72.71.128/2510.72.71.129 – 10.72.71.25410.72.71.255
14510.72.72.0/2510.72.72.1 – 10.72.72.12610.72.72.127
14610.72.72.128/2510.72.72.129 – 10.72.72.25410.72.72.255
14710.72.73.0/2510.72.73.1 – 10.72.73.12610.72.73.127
14810.72.73.128/2510.72.73.129 – 10.72.73.25410.72.73.255
14910.72.74.0/2510.72.74.1 – 10.72.74.12610.72.74.127
15010.72.74.128/2510.72.74.129 – 10.72.74.25410.72.74.255
15110.72.75.0/2510.72.75.1 – 10.72.75.12610.72.75.127
15210.72.75.128/2510.72.75.129 – 10.72.75.25410.72.75.255
15310.72.76.0/2510.72.76.1 – 10.72.76.12610.72.76.127
15410.72.76.128/2510.72.76.129 – 10.72.76.25410.72.76.255
15510.72.77.0/2510.72.77.1 – 10.72.77.12610.72.77.127
15610.72.77.128/2510.72.77.129 – 10.72.77.25410.72.77.255
15710.72.78.0/2510.72.78.1 – 10.72.78.12610.72.78.127
15810.72.78.128/2510.72.78.129 – 10.72.78.25410.72.78.255
15910.72.79.0/2510.72.79.1 – 10.72.79.12610.72.79.127
16010.72.79.128/2510.72.79.129 – 10.72.79.25410.72.79.255
16110.72.80.0/2510.72.80.1 – 10.72.80.12610.72.80.127
16210.72.80.128/2510.72.80.129 – 10.72.80.25410.72.80.255
16310.72.81.0/2510.72.81.1 – 10.72.81.12610.72.81.127
16410.72.81.128/2510.72.81.129 – 10.72.81.25410.72.81.255
16510.72.82.0/2510.72.82.1 – 10.72.82.12610.72.82.127
16610.72.82.128/2510.72.82.129 – 10.72.82.25410.72.82.255
16710.72.83.0/2510.72.83.1 – 10.72.83.12610.72.83.127
16810.72.83.128/2510.72.83.129 – 10.72.83.25410.72.83.255
16910.72.84.0/2510.72.84.1 – 10.72.84.12610.72.84.127
17010.72.84.128/2510.72.84.129 – 10.72.84.25410.72.84.255
17110.72.85.0/2510.72.85.1 – 10.72.85.12610.72.85.127
17210.72.85.128/2510.72.85.129 – 10.72.85.25410.72.85.255
17310.72.86.0/2510.72.86.1 – 10.72.86.12610.72.86.127
17410.72.86.128/2510.72.86.129 – 10.72.86.25410.72.86.255
17510.72.87.0/2510.72.87.1 – 10.72.87.12610.72.87.127
17610.72.87.128/2510.72.87.129 – 10.72.87.25410.72.87.255
17710.72.88.0/2510.72.88.1 – 10.72.88.12610.72.88.127
17810.72.88.128/2510.72.88.129 – 10.72.88.25410.72.88.255
17910.72.89.0/2510.72.89.1 – 10.72.89.12610.72.89.127
18010.72.89.128/2510.72.89.129 – 10.72.89.25410.72.89.255
18110.72.90.0/2510.72.90.1 – 10.72.90.12610.72.90.127
18210.72.90.128/2510.72.90.129 – 10.72.90.25410.72.90.255
18310.72.91.0/2510.72.91.1 – 10.72.91.12610.72.91.127
18410.72.91.128/2510.72.91.129 – 10.72.91.25410.72.91.255
18510.72.92.0/2510.72.92.1 – 10.72.92.12610.72.92.127
18610.72.92.128/2510.72.92.129 – 10.72.92.25410.72.92.255
18710.72.93.0/2510.72.93.1 – 10.72.93.12610.72.93.127
18810.72.93.128/2510.72.93.129 – 10.72.93.25410.72.93.255
18910.72.94.0/2510.72.94.1 – 10.72.94.12610.72.94.127
19010.72.94.128/2510.72.94.129 – 10.72.94.25410.72.94.255
19110.72.95.0/2510.72.95.1 – 10.72.95.12610.72.95.127
19210.72.95.128/2510.72.95.129 – 10.72.95.25410.72.95.255
19310.72.96.0/2510.72.96.1 – 10.72.96.12610.72.96.127
19410.72.96.128/2510.72.96.129 – 10.72.96.25410.72.96.255
19510.72.97.0/2510.72.97.1 – 10.72.97.12610.72.97.127
19610.72.97.128/2510.72.97.129 – 10.72.97.25410.72.97.255
19710.72.98.0/2510.72.98.1 – 10.72.98.12610.72.98.127
19810.72.98.128/2510.72.98.129 – 10.72.98.25410.72.98.255
19910.72.99.0/2510.72.99.1 – 10.72.99.12610.72.99.127
20010.72.99.128/2510.72.99.129 – 10.72.99.25410.72.99.255
20110.72.100.0/2510.72.100.1 – 10.72.100.12610.72.100.127
20210.72.100.128/2510.72.100.129 – 10.72.100.25410.72.100.255
20310.72.101.0/2510.72.101.1 – 10.72.101.12610.72.101.127
20410.72.101.128/2510.72.101.129 – 10.72.101.25410.72.101.255
20510.72.102.0/2510.72.102.1 – 10.72.102.12610.72.102.127
20610.72.102.128/2510.72.102.129 – 10.72.102.25410.72.102.255
20710.72.103.0/2510.72.103.1 – 10.72.103.12610.72.103.127
20810.72.103.128/2510.72.103.129 – 10.72.103.25410.72.103.255
20910.72.104.0/2510.72.104.1 – 10.72.104.12610.72.104.127
21010.72.104.128/2510.72.104.129 – 10.72.104.25410.72.104.255
21110.72.105.0/2510.72.105.1 – 10.72.105.12610.72.105.127
21210.72.105.128/2510.72.105.129 – 10.72.105.25410.72.105.255
21310.72.106.0/2510.72.106.1 – 10.72.106.12610.72.106.127
21410.72.106.128/2510.72.106.129 – 10.72.106.25410.72.106.255
21510.72.107.0/2510.72.107.1 – 10.72.107.12610.72.107.127
21610.72.107.128/2510.72.107.129 – 10.72.107.25410.72.107.255
21710.72.108.0/2510.72.108.1 – 10.72.108.12610.72.108.127
21810.72.108.128/2510.72.108.129 – 10.72.108.25410.72.108.255
21910.72.109.0/2510.72.109.1 – 10.72.109.12610.72.109.127
22010.72.109.128/2510.72.109.129 – 10.72.109.25410.72.109.255
22110.72.110.0/2510.72.110.1 – 10.72.110.12610.72.110.127
22210.72.110.128/2510.72.110.129 – 10.72.110.25410.72.110.255
22310.72.111.0/2510.72.111.1 – 10.72.111.12610.72.111.127
22410.72.111.128/2510.72.111.129 – 10.72.111.25410.72.111.255
22510.72.112.0/2510.72.112.1 – 10.72.112.12610.72.112.127
22610.72.112.128/2510.72.112.129 – 10.72.112.25410.72.112.255
22710.72.113.0/2510.72.113.1 – 10.72.113.12610.72.113.127
22810.72.113.128/2510.72.113.129 – 10.72.113.25410.72.113.255
22910.72.114.0/2510.72.114.1 – 10.72.114.12610.72.114.127
23010.72.114.128/2510.72.114.129 – 10.72.114.25410.72.114.255
23110.72.115.0/2510.72.115.1 – 10.72.115.12610.72.115.127
23210.72.115.128/2510.72.115.129 – 10.72.115.25410.72.115.255
23310.72.116.0/2510.72.116.1 – 10.72.116.12610.72.116.127
23410.72.116.128/2510.72.116.129 – 10.72.116.25410.72.116.255
23510.72.117.0/2510.72.117.1 – 10.72.117.12610.72.117.127
23610.72.117.128/2510.72.117.129 – 10.72.117.25410.72.117.255
23710.72.118.0/2510.72.118.1 – 10.72.118.12610.72.118.127
23810.72.118.128/2510.72.118.129 – 10.72.118.25410.72.118.255
23910.72.119.0/2510.72.119.1 – 10.72.119.12610.72.119.127
24010.72.119.128/2510.72.119.129 – 10.72.119.25410.72.119.255
24110.72.120.0/2510.72.120.1 – 10.72.120.12610.72.120.127
24210.72.120.128/2510.72.120.129 – 10.72.120.25410.72.120.255
24310.72.121.0/2510.72.121.1 – 10.72.121.12610.72.121.127
24410.72.121.128/2510.72.121.129 – 10.72.121.25410.72.121.255
24510.72.122.0/2510.72.122.1 – 10.72.122.12610.72.122.127
24610.72.122.128/2510.72.122.129 – 10.72.122.25410.72.122.255
24710.72.123.0/2510.72.123.1 – 10.72.123.12610.72.123.127
24810.72.123.128/2510.72.123.129 – 10.72.123.25410.72.123.255
24910.72.124.0/2510.72.124.1 – 10.72.124.12610.72.124.127
25010.72.124.128/2510.72.124.129 – 10.72.124.25410.72.124.255
25110.72.125.0/2510.72.125.1 – 10.72.125.12610.72.125.127
25210.72.125.128/2510.72.125.129 – 10.72.125.25410.72.125.255
25310.72.126.0/2510.72.126.1 – 10.72.126.12610.72.126.127
25410.72.126.128/2510.72.126.129 – 10.72.126.25410.72.126.255
25510.72.127.0/2510.72.127.1 – 10.72.127.12610.72.127.127
25610.72.127.128/2510.72.127.129 – 10.72.127.25410.72.127.255

showing 256 of 4,096

01 / table

IPv4 CIDR prefix table.

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

prefixsubnet maskaddresseshostsin your /13
/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-
/13255.248.0.0524,288524,2861
/14255.252.0.0262,144262,1422 split →
/15255.254.0.0131,072131,0704 split →
/16255.255.0.065,53665,5348 split →
/17255.255.128.032,76832,76616 split →
/18255.255.192.016,38416,38232 split →
/19255.255.224.08,1928,19064 split →
/20255.255.240.04,0964,094128 split →
/21255.255.248.02,0482,046256 split →
/22255.255.252.01,0241,022512 split →
/23255.255.254.05125101,024 split →
/24255.255.255.02562542,048 split →
/25255.255.255.1281281264,096 split →
/26255.255.255.19264628,192 split →
/27255.255.255.224323016,384 split →
/28255.255.255.240161432,768 split →
/29255.255.255.2488665,536 split →
/30255.255.255.25242131,072 split →
/31255.255.255.25422262,144 split →
/32255.255.255.25511524,288 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 →