I'm struggling to identify the shipping carrier by the tracking number provided, if this is a UPS Mail Innovations number. I"m writing a small C# library to complete this task and the best resource I've ever found is a Ruby based one called tracking_number, but it does not handle UPS MI. It gets decoded as USPS according all possible validations I've tried. For example, the tracking number "92748999955488513006484872" is decoded as USPS, while it is UPS MI number (it could be tracked via UPS MI site www.ups-mi.net).
QUESTION: What are the rules to distinguish UPS Mail Innovations from USPS tracking number?
According to United Parcel Service (UPS) customer support, UPS Mail Innovation tracking numbers are the same format as USPS tracking number and they can't be distinguished. Once the package arrives to USPS it could be tracked there.