List of IP addresses/hostnames from local network in Python

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If by “local” you mean on the same network segment, then you have to perform the following steps:

  1. Determine your own IP address
  2. Determine your own netmask
  3. Determine the network range
  4. Scan all the addresses (except the lowest, which is your network address and the highest, which is your broadcast address).
  5. Use your DNS’s reverse lookup to determine the hostname for IP addresses which respond to your scan.

Or you can just let Python execute nmap externally and pipe the results back into your program.

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