Effective July 1, 2025, the Postal Service™ will revise Labeling List(s) L002, L004, L005, L009, L012, L015, L051, 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 July 1, 2025, effective date through the August 31, 2025, expiration date.
Labeling Lists
L002 3-Digit ZIP Code Prefix Matrix
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Changes
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L004 3-Digit ZIP Code Prefix Groups — ADC Sortation
Changes
Newly Added
Deleted
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L005 3-Digit ZIP Code Prefix Groups — SCF Sortation
Changes
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L009 Mixed ADCs — Periodicals, Package Services Flats and Irregular Parcels and Standard Mail Flats
Changes
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L012 5 Digit ZIP Scheme Combination
Changes
Newly Added
Deleted
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L015 3-Digit ZIP Code Prefix Groups — ADC Ground Advantage Package Sortation
Changes
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L051 DSCF for Parcel Select
Changes
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L606 5-Digit Scheme — Standard Mail, First-Class Mail, and Package Services Parcels
Changes
Newly Added
Deleted
— Logistics, Network Development, and Support,
Network Operations, 6-12-25