contacts - Number recognition of company number ranges

I would like it, if it was possible to program a number range of a company in my phone as a pseudo-contact.

For example, I know my company has a thousand telephone numbers in a block. I have a number in that range, as have all my co-workers. For some, the number is ofcourse in my address book, and their name shows up correctly. However, I would like to add the whole range, so that in absence of a more specific match, it would still show my company name as the caller.

I doubt if this is possible, but should anybody know of a way, I'd like to hear about it.