Effective June 1, 2025, the Postal Service™ will revise Labeling List(s) L002, L004, L005, L007, L010, L012, L015, L051, L601, L602, L605, L606, and L607 to reflect changes in mail processing operations. Mailers are expected to label according to these revised lists for mailings inducted on or after the June 1, 2025, effective date through the July 31, 2025, expiration date.
Labeling Lists
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L002 3-Digit ZIP Code Prefix Matrix
Changes
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L004 3-Digit ZIP Code Prefix Groups — ADC Sortation
Changes
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L005 3-Digit ZIP Code Prefix Groups — SCF Sortation
Changes
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L007 5-Digit Scheme — Periodicals, Standard Mail, and Package Services Flats in Bundles
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Newly Added
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L010 NDC/ASF Entry — Standard Mail Letters and Package Services Irregular Parcels
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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L601 Network Distribution Centers (NDCs)
Changes
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L602 ASFs
Changes
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L605 NDCs/ASFs — Nonmachinable Parcel Select
Changes
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L606 5-Digit Scheme — Standard Mail, First-Class Mail, and Package Services Parcels
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Deleted
L607 3-Digit ZIP Code Sort Option for Drop-Ship Mailers
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Deleted
— Logistics, Network Development, and Support,
Network Operations, 5-15-25
