Your IP address:
Provider:
...

For example: 3.149.251.154

/
Input
Address: 129.41.172.0
Netmask: 255.255.254.0 = 23
Inversion mask: 0.0.1.255
Binary: 10000001.00101001.10101100.00000000
Reserved: No
Result
Network: 129.41.172.0/23 (Class B)
First IP: 129.41.172.1
Last IP: 129.41.173.254
Broadcast: 129.41.173.255
Network range: 129.41.172.0 - 129.41.173.255
List of all IP addresses: 129_41_172_0-23.txt
Number of hosts: 510
Number of IP addresses: 512