Your IP address:
Provider:
...

For example: 216.73.216.4

/
Input
Address: 149.7.12.0
Netmask: 255.255.252.0 = 22
Inversion mask: 0.0.3.255
Binary: 10010101.00000111.00001100.00000000
Reserved: No
Result
Network: 149.7.12.0/22 (Class B)
First IP: 149.7.12.1
Last IP: 149.7.15.254
Broadcast: 149.7.15.255
Network range: 149.7.12.0 - 149.7.15.255
List of all IP addresses: 149_7_12_0-22.txt
Number of hosts: 1022
Number of IP addresses: 1024