China Post Air mail tracking number is in the format of RB198273645CN. China Post EMS Mail: Along with registered mail, It also offers an accelerated delivery service named Express Mail Service. It is generally faster the registered service and takes approximately 7-14 days for delivery. EMS parcels, mails and shipments from Canada have tracking number ending with 'CA', for example, EE123456785CA, RR123456785CA and CP123456785CA. How to track EMS mail/shipments sent from Canada? Copy and paste your EMS tracking number to search field above or use Xpresspost - Canada Post site. The India Post tracking system is updated periodically to provide you with the most current information available about the location and status of your item. You'll be able to find out the following: EMS Tracking number is alpha-numeric code starting with two letters, followed by nine digits (eight serial number digits + a check digit) and two-letters country code. For example, EE123456785US, RR123456785US and CP123456785US. Checkdigit shows whether EMS tracking number contains a mistype. USPS Tracking is a service that allows users to monitor the location of their mail. Once you get a shipping id, you can check for tracking updates now and then. But how are these updates possible? It is all about the barcodes each registered mailpiece comes with. A barcode is scanned whenever a package goes through a postal facility.