The changes hitting USPS this month, which took effect April 1, are part of a 10-year plan to save the agency $36 billion.

For more precise expectations, the USPS is now using 5-Digit ZIP code pairs, rather than current standards that are based on 3-Digit ZIP code pairs. USPS already has a map online that will let ...

USPS estimates that 75% of Americans won’t see a change in First-Class Mail delivery, while 14% will see faster delivery ...

The following is a list of how service standards will be changed, according to the Postal Service fact sheet: Moving from a 3-digit to 3-digit zip code pairing ... A USPS map is available online ...