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)10.40.0.0/13
network10.40.0.0/13
broadcast10.47.255.255
first host10.40.0.1
last host10.47.255.254
subnet mask255.248.0.0
wildcard0.7.255.255
addresses524,288
usable hosts524,286
classA
ipcalc 10.40.0.0/13
address00001010.00101000.00000000.00000000
subnet mask11111111.11111000.00000000.00000000
network00001010.00101000.00000000.00000000
broadcast00001010.00101111.11111111.11111111
green = network part, grey = host part
hex0x0a280000
decimal170393600
reverse dns0.0.40.10.in-addr.arpa
ipv4-mapped::ffff:a28:0

/13 split into /25 · 4,096 subnets

close ×
#networkhost rangebroadcast
110.40.0.0/2510.40.0.1 – 10.40.0.12610.40.0.127
210.40.0.128/2510.40.0.129 – 10.40.0.25410.40.0.255
310.40.1.0/2510.40.1.1 – 10.40.1.12610.40.1.127
410.40.1.128/2510.40.1.129 – 10.40.1.25410.40.1.255
510.40.2.0/2510.40.2.1 – 10.40.2.12610.40.2.127
610.40.2.128/2510.40.2.129 – 10.40.2.25410.40.2.255
710.40.3.0/2510.40.3.1 – 10.40.3.12610.40.3.127
810.40.3.128/2510.40.3.129 – 10.40.3.25410.40.3.255
910.40.4.0/2510.40.4.1 – 10.40.4.12610.40.4.127
1010.40.4.128/2510.40.4.129 – 10.40.4.25410.40.4.255
1110.40.5.0/2510.40.5.1 – 10.40.5.12610.40.5.127
1210.40.5.128/2510.40.5.129 – 10.40.5.25410.40.5.255
1310.40.6.0/2510.40.6.1 – 10.40.6.12610.40.6.127
1410.40.6.128/2510.40.6.129 – 10.40.6.25410.40.6.255
1510.40.7.0/2510.40.7.1 – 10.40.7.12610.40.7.127
1610.40.7.128/2510.40.7.129 – 10.40.7.25410.40.7.255
1710.40.8.0/2510.40.8.1 – 10.40.8.12610.40.8.127
1810.40.8.128/2510.40.8.129 – 10.40.8.25410.40.8.255
1910.40.9.0/2510.40.9.1 – 10.40.9.12610.40.9.127
2010.40.9.128/2510.40.9.129 – 10.40.9.25410.40.9.255
2110.40.10.0/2510.40.10.1 – 10.40.10.12610.40.10.127
2210.40.10.128/2510.40.10.129 – 10.40.10.25410.40.10.255
2310.40.11.0/2510.40.11.1 – 10.40.11.12610.40.11.127
2410.40.11.128/2510.40.11.129 – 10.40.11.25410.40.11.255
2510.40.12.0/2510.40.12.1 – 10.40.12.12610.40.12.127
2610.40.12.128/2510.40.12.129 – 10.40.12.25410.40.12.255
2710.40.13.0/2510.40.13.1 – 10.40.13.12610.40.13.127
2810.40.13.128/2510.40.13.129 – 10.40.13.25410.40.13.255
2910.40.14.0/2510.40.14.1 – 10.40.14.12610.40.14.127
3010.40.14.128/2510.40.14.129 – 10.40.14.25410.40.14.255
3110.40.15.0/2510.40.15.1 – 10.40.15.12610.40.15.127
3210.40.15.128/2510.40.15.129 – 10.40.15.25410.40.15.255
3310.40.16.0/2510.40.16.1 – 10.40.16.12610.40.16.127
3410.40.16.128/2510.40.16.129 – 10.40.16.25410.40.16.255
3510.40.17.0/2510.40.17.1 – 10.40.17.12610.40.17.127
3610.40.17.128/2510.40.17.129 – 10.40.17.25410.40.17.255
3710.40.18.0/2510.40.18.1 – 10.40.18.12610.40.18.127
3810.40.18.128/2510.40.18.129 – 10.40.18.25410.40.18.255
3910.40.19.0/2510.40.19.1 – 10.40.19.12610.40.19.127
4010.40.19.128/2510.40.19.129 – 10.40.19.25410.40.19.255
4110.40.20.0/2510.40.20.1 – 10.40.20.12610.40.20.127
4210.40.20.128/2510.40.20.129 – 10.40.20.25410.40.20.255
4310.40.21.0/2510.40.21.1 – 10.40.21.12610.40.21.127
4410.40.21.128/2510.40.21.129 – 10.40.21.25410.40.21.255
4510.40.22.0/2510.40.22.1 – 10.40.22.12610.40.22.127
4610.40.22.128/2510.40.22.129 – 10.40.22.25410.40.22.255
4710.40.23.0/2510.40.23.1 – 10.40.23.12610.40.23.127
4810.40.23.128/2510.40.23.129 – 10.40.23.25410.40.23.255
4910.40.24.0/2510.40.24.1 – 10.40.24.12610.40.24.127
5010.40.24.128/2510.40.24.129 – 10.40.24.25410.40.24.255
5110.40.25.0/2510.40.25.1 – 10.40.25.12610.40.25.127
5210.40.25.128/2510.40.25.129 – 10.40.25.25410.40.25.255
5310.40.26.0/2510.40.26.1 – 10.40.26.12610.40.26.127
5410.40.26.128/2510.40.26.129 – 10.40.26.25410.40.26.255
5510.40.27.0/2510.40.27.1 – 10.40.27.12610.40.27.127
5610.40.27.128/2510.40.27.129 – 10.40.27.25410.40.27.255
5710.40.28.0/2510.40.28.1 – 10.40.28.12610.40.28.127
5810.40.28.128/2510.40.28.129 – 10.40.28.25410.40.28.255
5910.40.29.0/2510.40.29.1 – 10.40.29.12610.40.29.127
6010.40.29.128/2510.40.29.129 – 10.40.29.25410.40.29.255
6110.40.30.0/2510.40.30.1 – 10.40.30.12610.40.30.127
6210.40.30.128/2510.40.30.129 – 10.40.30.25410.40.30.255
6310.40.31.0/2510.40.31.1 – 10.40.31.12610.40.31.127
6410.40.31.128/2510.40.31.129 – 10.40.31.25410.40.31.255
6510.40.32.0/2510.40.32.1 – 10.40.32.12610.40.32.127
6610.40.32.128/2510.40.32.129 – 10.40.32.25410.40.32.255
6710.40.33.0/2510.40.33.1 – 10.40.33.12610.40.33.127
6810.40.33.128/2510.40.33.129 – 10.40.33.25410.40.33.255
6910.40.34.0/2510.40.34.1 – 10.40.34.12610.40.34.127
7010.40.34.128/2510.40.34.129 – 10.40.34.25410.40.34.255
7110.40.35.0/2510.40.35.1 – 10.40.35.12610.40.35.127
7210.40.35.128/2510.40.35.129 – 10.40.35.25410.40.35.255
7310.40.36.0/2510.40.36.1 – 10.40.36.12610.40.36.127
7410.40.36.128/2510.40.36.129 – 10.40.36.25410.40.36.255
7510.40.37.0/2510.40.37.1 – 10.40.37.12610.40.37.127
7610.40.37.128/2510.40.37.129 – 10.40.37.25410.40.37.255
7710.40.38.0/2510.40.38.1 – 10.40.38.12610.40.38.127
7810.40.38.128/2510.40.38.129 – 10.40.38.25410.40.38.255
7910.40.39.0/2510.40.39.1 – 10.40.39.12610.40.39.127
8010.40.39.128/2510.40.39.129 – 10.40.39.25410.40.39.255
8110.40.40.0/2510.40.40.1 – 10.40.40.12610.40.40.127
8210.40.40.128/2510.40.40.129 – 10.40.40.25410.40.40.255
8310.40.41.0/2510.40.41.1 – 10.40.41.12610.40.41.127
8410.40.41.128/2510.40.41.129 – 10.40.41.25410.40.41.255
8510.40.42.0/2510.40.42.1 – 10.40.42.12610.40.42.127
8610.40.42.128/2510.40.42.129 – 10.40.42.25410.40.42.255
8710.40.43.0/2510.40.43.1 – 10.40.43.12610.40.43.127
8810.40.43.128/2510.40.43.129 – 10.40.43.25410.40.43.255
8910.40.44.0/2510.40.44.1 – 10.40.44.12610.40.44.127
9010.40.44.128/2510.40.44.129 – 10.40.44.25410.40.44.255
9110.40.45.0/2510.40.45.1 – 10.40.45.12610.40.45.127
9210.40.45.128/2510.40.45.129 – 10.40.45.25410.40.45.255
9310.40.46.0/2510.40.46.1 – 10.40.46.12610.40.46.127
9410.40.46.128/2510.40.46.129 – 10.40.46.25410.40.46.255
9510.40.47.0/2510.40.47.1 – 10.40.47.12610.40.47.127
9610.40.47.128/2510.40.47.129 – 10.40.47.25410.40.47.255
9710.40.48.0/2510.40.48.1 – 10.40.48.12610.40.48.127
9810.40.48.128/2510.40.48.129 – 10.40.48.25410.40.48.255
9910.40.49.0/2510.40.49.1 – 10.40.49.12610.40.49.127
10010.40.49.128/2510.40.49.129 – 10.40.49.25410.40.49.255
10110.40.50.0/2510.40.50.1 – 10.40.50.12610.40.50.127
10210.40.50.128/2510.40.50.129 – 10.40.50.25410.40.50.255
10310.40.51.0/2510.40.51.1 – 10.40.51.12610.40.51.127
10410.40.51.128/2510.40.51.129 – 10.40.51.25410.40.51.255
10510.40.52.0/2510.40.52.1 – 10.40.52.12610.40.52.127
10610.40.52.128/2510.40.52.129 – 10.40.52.25410.40.52.255
10710.40.53.0/2510.40.53.1 – 10.40.53.12610.40.53.127
10810.40.53.128/2510.40.53.129 – 10.40.53.25410.40.53.255
10910.40.54.0/2510.40.54.1 – 10.40.54.12610.40.54.127
11010.40.54.128/2510.40.54.129 – 10.40.54.25410.40.54.255
11110.40.55.0/2510.40.55.1 – 10.40.55.12610.40.55.127
11210.40.55.128/2510.40.55.129 – 10.40.55.25410.40.55.255
11310.40.56.0/2510.40.56.1 – 10.40.56.12610.40.56.127
11410.40.56.128/2510.40.56.129 – 10.40.56.25410.40.56.255
11510.40.57.0/2510.40.57.1 – 10.40.57.12610.40.57.127
11610.40.57.128/2510.40.57.129 – 10.40.57.25410.40.57.255
11710.40.58.0/2510.40.58.1 – 10.40.58.12610.40.58.127
11810.40.58.128/2510.40.58.129 – 10.40.58.25410.40.58.255
11910.40.59.0/2510.40.59.1 – 10.40.59.12610.40.59.127
12010.40.59.128/2510.40.59.129 – 10.40.59.25410.40.59.255
12110.40.60.0/2510.40.60.1 – 10.40.60.12610.40.60.127
12210.40.60.128/2510.40.60.129 – 10.40.60.25410.40.60.255
12310.40.61.0/2510.40.61.1 – 10.40.61.12610.40.61.127
12410.40.61.128/2510.40.61.129 – 10.40.61.25410.40.61.255
12510.40.62.0/2510.40.62.1 – 10.40.62.12610.40.62.127
12610.40.62.128/2510.40.62.129 – 10.40.62.25410.40.62.255
12710.40.63.0/2510.40.63.1 – 10.40.63.12610.40.63.127
12810.40.63.128/2510.40.63.129 – 10.40.63.25410.40.63.255
12910.40.64.0/2510.40.64.1 – 10.40.64.12610.40.64.127
13010.40.64.128/2510.40.64.129 – 10.40.64.25410.40.64.255
13110.40.65.0/2510.40.65.1 – 10.40.65.12610.40.65.127
13210.40.65.128/2510.40.65.129 – 10.40.65.25410.40.65.255
13310.40.66.0/2510.40.66.1 – 10.40.66.12610.40.66.127
13410.40.66.128/2510.40.66.129 – 10.40.66.25410.40.66.255
13510.40.67.0/2510.40.67.1 – 10.40.67.12610.40.67.127
13610.40.67.128/2510.40.67.129 – 10.40.67.25410.40.67.255
13710.40.68.0/2510.40.68.1 – 10.40.68.12610.40.68.127
13810.40.68.128/2510.40.68.129 – 10.40.68.25410.40.68.255
13910.40.69.0/2510.40.69.1 – 10.40.69.12610.40.69.127
14010.40.69.128/2510.40.69.129 – 10.40.69.25410.40.69.255
14110.40.70.0/2510.40.70.1 – 10.40.70.12610.40.70.127
14210.40.70.128/2510.40.70.129 – 10.40.70.25410.40.70.255
14310.40.71.0/2510.40.71.1 – 10.40.71.12610.40.71.127
14410.40.71.128/2510.40.71.129 – 10.40.71.25410.40.71.255
14510.40.72.0/2510.40.72.1 – 10.40.72.12610.40.72.127
14610.40.72.128/2510.40.72.129 – 10.40.72.25410.40.72.255
14710.40.73.0/2510.40.73.1 – 10.40.73.12610.40.73.127
14810.40.73.128/2510.40.73.129 – 10.40.73.25410.40.73.255
14910.40.74.0/2510.40.74.1 – 10.40.74.12610.40.74.127
15010.40.74.128/2510.40.74.129 – 10.40.74.25410.40.74.255
15110.40.75.0/2510.40.75.1 – 10.40.75.12610.40.75.127
15210.40.75.128/2510.40.75.129 – 10.40.75.25410.40.75.255
15310.40.76.0/2510.40.76.1 – 10.40.76.12610.40.76.127
15410.40.76.128/2510.40.76.129 – 10.40.76.25410.40.76.255
15510.40.77.0/2510.40.77.1 – 10.40.77.12610.40.77.127
15610.40.77.128/2510.40.77.129 – 10.40.77.25410.40.77.255
15710.40.78.0/2510.40.78.1 – 10.40.78.12610.40.78.127
15810.40.78.128/2510.40.78.129 – 10.40.78.25410.40.78.255
15910.40.79.0/2510.40.79.1 – 10.40.79.12610.40.79.127
16010.40.79.128/2510.40.79.129 – 10.40.79.25410.40.79.255
16110.40.80.0/2510.40.80.1 – 10.40.80.12610.40.80.127
16210.40.80.128/2510.40.80.129 – 10.40.80.25410.40.80.255
16310.40.81.0/2510.40.81.1 – 10.40.81.12610.40.81.127
16410.40.81.128/2510.40.81.129 – 10.40.81.25410.40.81.255
16510.40.82.0/2510.40.82.1 – 10.40.82.12610.40.82.127
16610.40.82.128/2510.40.82.129 – 10.40.82.25410.40.82.255
16710.40.83.0/2510.40.83.1 – 10.40.83.12610.40.83.127
16810.40.83.128/2510.40.83.129 – 10.40.83.25410.40.83.255
16910.40.84.0/2510.40.84.1 – 10.40.84.12610.40.84.127
17010.40.84.128/2510.40.84.129 – 10.40.84.25410.40.84.255
17110.40.85.0/2510.40.85.1 – 10.40.85.12610.40.85.127
17210.40.85.128/2510.40.85.129 – 10.40.85.25410.40.85.255
17310.40.86.0/2510.40.86.1 – 10.40.86.12610.40.86.127
17410.40.86.128/2510.40.86.129 – 10.40.86.25410.40.86.255
17510.40.87.0/2510.40.87.1 – 10.40.87.12610.40.87.127
17610.40.87.128/2510.40.87.129 – 10.40.87.25410.40.87.255
17710.40.88.0/2510.40.88.1 – 10.40.88.12610.40.88.127
17810.40.88.128/2510.40.88.129 – 10.40.88.25410.40.88.255
17910.40.89.0/2510.40.89.1 – 10.40.89.12610.40.89.127
18010.40.89.128/2510.40.89.129 – 10.40.89.25410.40.89.255
18110.40.90.0/2510.40.90.1 – 10.40.90.12610.40.90.127
18210.40.90.128/2510.40.90.129 – 10.40.90.25410.40.90.255
18310.40.91.0/2510.40.91.1 – 10.40.91.12610.40.91.127
18410.40.91.128/2510.40.91.129 – 10.40.91.25410.40.91.255
18510.40.92.0/2510.40.92.1 – 10.40.92.12610.40.92.127
18610.40.92.128/2510.40.92.129 – 10.40.92.25410.40.92.255
18710.40.93.0/2510.40.93.1 – 10.40.93.12610.40.93.127
18810.40.93.128/2510.40.93.129 – 10.40.93.25410.40.93.255
18910.40.94.0/2510.40.94.1 – 10.40.94.12610.40.94.127
19010.40.94.128/2510.40.94.129 – 10.40.94.25410.40.94.255
19110.40.95.0/2510.40.95.1 – 10.40.95.12610.40.95.127
19210.40.95.128/2510.40.95.129 – 10.40.95.25410.40.95.255
19310.40.96.0/2510.40.96.1 – 10.40.96.12610.40.96.127
19410.40.96.128/2510.40.96.129 – 10.40.96.25410.40.96.255
19510.40.97.0/2510.40.97.1 – 10.40.97.12610.40.97.127
19610.40.97.128/2510.40.97.129 – 10.40.97.25410.40.97.255
19710.40.98.0/2510.40.98.1 – 10.40.98.12610.40.98.127
19810.40.98.128/2510.40.98.129 – 10.40.98.25410.40.98.255
19910.40.99.0/2510.40.99.1 – 10.40.99.12610.40.99.127
20010.40.99.128/2510.40.99.129 – 10.40.99.25410.40.99.255
20110.40.100.0/2510.40.100.1 – 10.40.100.12610.40.100.127
20210.40.100.128/2510.40.100.129 – 10.40.100.25410.40.100.255
20310.40.101.0/2510.40.101.1 – 10.40.101.12610.40.101.127
20410.40.101.128/2510.40.101.129 – 10.40.101.25410.40.101.255
20510.40.102.0/2510.40.102.1 – 10.40.102.12610.40.102.127
20610.40.102.128/2510.40.102.129 – 10.40.102.25410.40.102.255
20710.40.103.0/2510.40.103.1 – 10.40.103.12610.40.103.127
20810.40.103.128/2510.40.103.129 – 10.40.103.25410.40.103.255
20910.40.104.0/2510.40.104.1 – 10.40.104.12610.40.104.127
21010.40.104.128/2510.40.104.129 – 10.40.104.25410.40.104.255
21110.40.105.0/2510.40.105.1 – 10.40.105.12610.40.105.127
21210.40.105.128/2510.40.105.129 – 10.40.105.25410.40.105.255
21310.40.106.0/2510.40.106.1 – 10.40.106.12610.40.106.127
21410.40.106.128/2510.40.106.129 – 10.40.106.25410.40.106.255
21510.40.107.0/2510.40.107.1 – 10.40.107.12610.40.107.127
21610.40.107.128/2510.40.107.129 – 10.40.107.25410.40.107.255
21710.40.108.0/2510.40.108.1 – 10.40.108.12610.40.108.127
21810.40.108.128/2510.40.108.129 – 10.40.108.25410.40.108.255
21910.40.109.0/2510.40.109.1 – 10.40.109.12610.40.109.127
22010.40.109.128/2510.40.109.129 – 10.40.109.25410.40.109.255
22110.40.110.0/2510.40.110.1 – 10.40.110.12610.40.110.127
22210.40.110.128/2510.40.110.129 – 10.40.110.25410.40.110.255
22310.40.111.0/2510.40.111.1 – 10.40.111.12610.40.111.127
22410.40.111.128/2510.40.111.129 – 10.40.111.25410.40.111.255
22510.40.112.0/2510.40.112.1 – 10.40.112.12610.40.112.127
22610.40.112.128/2510.40.112.129 – 10.40.112.25410.40.112.255
22710.40.113.0/2510.40.113.1 – 10.40.113.12610.40.113.127
22810.40.113.128/2510.40.113.129 – 10.40.113.25410.40.113.255
22910.40.114.0/2510.40.114.1 – 10.40.114.12610.40.114.127
23010.40.114.128/2510.40.114.129 – 10.40.114.25410.40.114.255
23110.40.115.0/2510.40.115.1 – 10.40.115.12610.40.115.127
23210.40.115.128/2510.40.115.129 – 10.40.115.25410.40.115.255
23310.40.116.0/2510.40.116.1 – 10.40.116.12610.40.116.127
23410.40.116.128/2510.40.116.129 – 10.40.116.25410.40.116.255
23510.40.117.0/2510.40.117.1 – 10.40.117.12610.40.117.127
23610.40.117.128/2510.40.117.129 – 10.40.117.25410.40.117.255
23710.40.118.0/2510.40.118.1 – 10.40.118.12610.40.118.127
23810.40.118.128/2510.40.118.129 – 10.40.118.25410.40.118.255
23910.40.119.0/2510.40.119.1 – 10.40.119.12610.40.119.127
24010.40.119.128/2510.40.119.129 – 10.40.119.25410.40.119.255
24110.40.120.0/2510.40.120.1 – 10.40.120.12610.40.120.127
24210.40.120.128/2510.40.120.129 – 10.40.120.25410.40.120.255
24310.40.121.0/2510.40.121.1 – 10.40.121.12610.40.121.127
24410.40.121.128/2510.40.121.129 – 10.40.121.25410.40.121.255
24510.40.122.0/2510.40.122.1 – 10.40.122.12610.40.122.127
24610.40.122.128/2510.40.122.129 – 10.40.122.25410.40.122.255
24710.40.123.0/2510.40.123.1 – 10.40.123.12610.40.123.127
24810.40.123.128/2510.40.123.129 – 10.40.123.25410.40.123.255
24910.40.124.0/2510.40.124.1 – 10.40.124.12610.40.124.127
25010.40.124.128/2510.40.124.129 – 10.40.124.25410.40.124.255
25110.40.125.0/2510.40.125.1 – 10.40.125.12610.40.125.127
25210.40.125.128/2510.40.125.129 – 10.40.125.25410.40.125.255
25310.40.126.0/2510.40.126.1 – 10.40.126.12610.40.126.127
25410.40.126.128/2510.40.126.129 – 10.40.126.25410.40.126.255
25510.40.127.0/2510.40.127.1 – 10.40.127.12610.40.127.127
25610.40.127.128/2510.40.127.129 – 10.40.127.25410.40.127.255

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 →