Train Identification websites

Does anyone know of any good train id websites? You know, point of origin and point of destination. For example, train CWEMS or train U76771. What's that mean? I knew of one such website, but it's address slipped my mind...

Altamont Press has a series of railfan timetables for sale. The website is altamontpress.com.

As far as the CWENS train on the Union Pacific railroad, here's how it brakes down; C=coal train, WE=Arco, CO (West Elko Mine), NS=NS coal various orgin. I would say this is a unit coal train from Arco, CO going to be handed of to the Norfolk Southern railroad to get this shipment to a customer.

I hope this helps out.

Thanks a million.