USPS Tracking®

Track USPS Tracking Number Formats By Parcel Tracking USPS tracking number format is 20 digits (9999 9999 9999 9999 9999), or a mixture of 13 alphanumeric characters, usually beginning with 2 alphabets, following by 9 digits, and closing by “US” (e.g. EA 999 999 999 US). Some other less popular forms may also exist, such…