

22-digit tracking number: This format is used for First-Class Package Service and Package Services shipments.The number starts with two letters followed by eight digits, two letters, and eight digits. 20-digit tracking number: This format is used for Express Mail and Priority Mail shipments.There are several formats for USPS tracking numbers, including: They consist of a combination of letters and numbers and are used to monitor the progress of a shipment from the time it is sent to the time it is delivered. USPS tracking numbers are unique codes assigned to packages and mail classes sent through the United States Postal Service. Signature Confirmation : 22 numeric i.e.Registered Mail : 22 digit numeric i.e.Priority Mail International : 13 digit alpha numeric i.e.USPS Priority Mail Express International : 13 digit alpha numeric i.e.

Global Express Guaranteed : 10 digit Numeric i.e.Collect on Delivery: 22 digit numbers i.e.Certified Mail : 22 digit numbers i.e.USPS Priority Mail Format : 22 digit numbers i.e.USPS Tracking Format : 22 digit numbers i.e.

