The current OnTrac JSON file in the tracking number ruleset only accounts for the legacy C-prefixed or D-Prefixed tracking numbers. However, OnTrac officially supports additional formats(1LS, LS, LX, BN) that are not recognized by the library. This causes valid tracking numbers to go unrecognized or be flagged as invalid. Please find below the evidence from OnTrac website for there tracking number mapping.
https://www.ontrac.com/faq/ -> In this, Please Read Q. I don’t have a tracking number. What do I do?
The current OnTrac JSON file in the tracking number ruleset only accounts for the legacy C-prefixed or D-Prefixed tracking numbers. However, OnTrac officially supports additional formats(1LS, LS, LX, BN) that are not recognized by the library. This causes valid tracking numbers to go unrecognized or be flagged as invalid. Please find below the evidence from OnTrac website for there tracking number mapping.
https://www.ontrac.com/faq/ -> In this, Please Read Q. I don’t have a tracking number. What do I do?