Effective April 1, 2026, the Postal Service™ will revise Labeling List(s) L002, L005, L007, L012, L016, L051, L201, and L606 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the April 1, 2026, effective date through the May 31, 2026, expiration date.
Labeling Lists
L002 3-Digit ZIP Code Prefix Matrix
Changes
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L005 3-Digit ZIP Code Prefix Groups — SCF Letter Sortation
Changes
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L007 5-Digit Scheme — Periodicals, Standard Mail, and Package Services Flats in Bundles
Due to the extensive number of changes to the L007, these changes will not be published in the Postal Bulletin. The changes effective April 1, 2026, for the L007 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-april-2026.
All other EELLs changes effective April 1, 2026, can be found in Postal Pro as well.
L012 5 Digit ZIP Scheme Combination
Changes
Newly Added
Deleted
* * * * *
L016 3-Digit ZIP Code Prefix Groups — SCF Flat Sortation
Changes
* * * * *
L051 DSCF for Parcel Select / Market-Dominant Parcels
Changes
* * * * *
L201 Periodicals Origin Split and First-Class Mail Mixed ADC/AADC
Due to the extensive number of changes to the L201, these changes will not be published in the Postal Bulletin. The changes effective April 1, 2026, for the L201 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-april-2026.
All other EELLs changes effective April 1, 2026, can be found in Postal Pro as well.
L606 5-Digit Scheme — Standard Mail, First-Class Mail, and Package Services Parcels
Changes
Newly Added
Deleted
— Logistics, Network Development, and Support,
Network Operations, 3-19-26
