If Count is not in a certain range, delete Rows
 

I have a spreadsheet that is 59752 x 2, with the one column Contact ID A and
the other column Contact Link ID. It is like an instant messaging system. It
looks something like this:

1 2
1 3
1 15
2 1
2 15

I want to count by different values in column A, and any count that is not
within one of several ranges, those rows get deleted. So if the range is 3-5
contacts, then I want to keep the set of 1s, but delete the set of 2s. My
ranges are 4-5 contacts, 30-41 contacts, and 100+ contacts.

I am also brand new to macros, but I have experience with some other coding
in Matlab and other programs and I understand logic statements and the like.
Still, the more help/explanation the better. I am using 2007.

Thank you!!