The national scanning score for the week ending March 4 was 97.16 percent, up from one week earlier.
Western (97.53 percent) again finished first among the areas, followed by Southern (97.26 percent) and Eastern (97.22 percent).
The top three districts were Portland (98.17 percent), Arkansas (98.14 percent) and Greater South Carolina (97.92 percent), which climbed five spots from a week ago.
Scanning allows customers to track their packages and other mail. It also helps the Postal Service improve efficiency and network management.
Informational videos about scanning are available at USPS-TV.