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Nannybooby, you may have hit on the answer BT will not provide a decent caller ID service because while they can see the callers' details (assuming they internally have a post 70's capability), you cannot, so they can then charge you for using their privileged information. However, I rather think what you are referring to is the TPS (which I am covered by) but they can only influence UK callers and not those based abroad (and BT actually have no means or the will to do anything effective ?). Sherrardk, assuming you are in the UK you cannot possibly have a list of numbers that includes any overseas numbers because in the UK there are no facilities for identifying the number from which an international call originates - people you call abroad are able to see yours as you call them (their networks are modern) but you cannot see theirs as they call you (UK networks are primitive). I am referring to landlines, not mobiles, but the situation may be exactly the same on both.