Your IP address:
Provider:
...

For example: 216.73.217.125

/
Input
Address: 153.72.88.0
Netmask: 255.255.248.0 = 21
Inversion mask: 0.0.7.255
Binary: 10011001.01001000.01011000.00000000
Reserved: No
Result
Network: 153.72.88.0/21 (Class B)
First IP: 153.72.88.1
Last IP: 153.72.95.254
Broadcast: 153.72.95.255
Network range: 153.72.88.0 - 153.72.95.255
List of all IP addresses: 153_72_88_0-21.txt
Number of hosts: 2046
Number of IP addresses: 2048