Your IP address:
Provider:
...

For example: 3.145.111.183

/
Input
Address: 144.81.130.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 10010000.01010001.10000010.00000000
Reserved: No
Result
Network: 144.81.130.0/23 (Class B)
First IP: 144.81.130.1
Last IP: 144.81.131.254
Broadcast: 144.81.131.255
Network range: 144.81.130.0 - 144.81.131.255
List of all IP addresses: 144_81_130_0-23.txt
Number of hosts: 510
Number of IP addresses: 512