[removed] Is IP In One Of These Subnets?

Question

So I have ~12600 subnets:

eg. 123.123.208.0/20

and an IP.

I can use a SQLite Database or an array or whatever

There was a similar question asked

Answer 1

Functions IPnumber and IPmask are nice, however I would rather test like:

(IPnumber('123.123.49.123') & IPmask('22')) == (IPnumber('123.123.48.0')  & IPmask('22'))

Because for each address, you only need to take into account the network part of the address. Hence doing IPmask('22') will zero-out the computer part of the address and you should do the same with the network address.