: Authentic USPS updates come from a 5-digit "short code" (like 28777), not a standard 10-digit phone number. Smishing: Package Tracking Text Scams - USPIS.gov

: The 6-digit number "156476" is a major red flag, as official ZIP codes are five digits.

There is no valid "156476" ZIP code in the United States; standard U.S. ZIP codes are only five digits long. Scammers often send these messages to trick you into clicking a link and providing personal or financial information. How to Identify the Scam