Which carrier is my tracking number?

You can usually tell the carrier from the tracking number's length and the letters at the start or end.

Quick guide

Reading an international postal number

Numbers like LM153306435CN follow a worldwide postal standard. The last two letters are the country it was sent from (CN is China, GB the United Kingdom, CA Canada). The first letter hints at the service: R is registered mail, E is express mail (EMS), C is a parcel, and L or U is a tracked small packet. The ninth digit is a check digit, so a single typo usually makes the number invalid — Any Day Now checks it and tells you before looking it up.

A longer number from a barcode

If you scanned a USPS label and got a number starting with 420 followed by your ZIP code, the real tracking number is the part after the ZIP code. Any Day Now trims it for you.

When the number isn't found