Effective December 1, 2026, the Postal Service™ will revise Labeling List(s) L001, L004, L009, L010, L012, L015, L016, L201, L602, L605, 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 December 1, 2026, effective date through the January 31, 2027, expiration date.
Labeling Lists
L001 5-Digit Scheme — Periodicals, Standard Mail, and Package Services Flats and Irregular Parcels
* * * * *
Deleted
* * * * *
L004 3-Digit ZIP Code Prefix Groups — ADC Sortation
Due to the extensive number of changes to the L004, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L004 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 1, 2026, can be found in Postal Pro as well.
L009 Mixed ADCs — Periodicals, Package Services Flats, and Irregular Parcels and Standard Mail Flats
Due to the extensive number of changes to the L009, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L009 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 1, 2026, can be found in Postal Pro as well.
L010 NDC/ASF Entry — Standard Mail Letters and Package Services Irregular Parcels
* * * * *
Deleted
L012 5-Digit ZIP Scheme Combination
* * * * *
Deleted
* * * * *
L015 3-Digit ZIP Code Prefix Groups — ADC Ground Advantage Package Sortation
Due to the extensive number of changes to the L015, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L015 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 1, 2026, can be found in Postal Pro as well.
L016 3-Digit ZIP Code Prefix Groups — SCF Flat Sortation
Changes
* * * * *
L201 Origin Split for SCF Destinations (REFERENCE ONLY)
Due to the extensive number of changes to the L201, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L201 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 1, 2026, can be found in Postal Pro as well.
L602 ASFs
Due to the extensive number of changes to the L602, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L602 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 1, 2026, can be found in Postal Pro as well.
L605 NDCs/ASFs — Nonmachinable Parcel Select
Due to the extensive number of changes to the L605, these changes will not be published in the Postal Bulletin. The change effective December 1, 2026, for the L605 can be found in Postal Pro at the following link: postalpro.usps.com/operations/labeling-lists/changes-december-2026. All other EELLS changes effective December 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
Note: Effective January 1, 2027, the Postal Service will discontinue publishing Labelling Lists L004, L009, L010, L015, L601, L602, and L605. Mailers must not use these lists for generating labels.
— Logistics, Network Development, and Support,
Network Operations, 11-12-26
