How can I calculate the minimum subnet masks for a pool of addresses?

Question

linux

There is a txt file with 1.35 million sorted and unique IP addresses of botnet networks/infected servers that are constantly roaming the net. Type:

1.2.169.8
1.2.169.12
1.2.169.28
1.2.169.49
1.2.169.81
1.2.169.101
1.2.170.104
1.2.170.109
1.2.170.110 ...
_

Actually, there is a very strong desire to pervert and reduce this list by means of masks, with a minimal loss of "white" (not included in this list) IP addresses to the form:

1.2.169.0/25
1.2.170.104/26
...

So that later the entire list can be fed to the networks of filial Mikrotiks and set up rules in the fireworks.
Yes, I myself know that this is from a cannon on sparrows, but nonetheless. Interest pursues me.

Actually the question is: are there any programs or maybe someone has come across ready-made Python / Bash scripts with this implementation?

Answer 1

Don't be perverted. It doesn't work that way, and littering the address of microtax sheets with lists merged somewhere with millions of addresses is noble masturbation. If you want the bots not to knock, just set up the firework correctly, determine what you are protecting and from what.

Answer 2

Advise correctly. Specifically, on the topic, the iprange utility should help you:
https://github.com/firehol/iprange/wiki