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U S Postal Service Email Lists & Mailing Lists

by Alice Scott · Updated Mar 23, 2026 ✓ Verified Data

Buy U S Postal Service Email Lists & Mailing Lists from LeadsPlease — voted #1 "Best List Broker Overall" by Business.com. Connect with influential contacts at local, regional, and national U S Postal Service operations across the country with up-to-date, NCOA-verified mailing data and over 98% accuracy. Reach professionals handling mail processing, delivery, and administrative duties within this essential government sector to maximize your outreach and business opportunities.

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About U S Postal Service Email Lists & Mailing Lists

U S Postal Service Email Lists & Mailing Lists are business marketing lists that include important contact information for key decision makers at U S Postal Service across the country. These high quality b2b marketing lists help you quickly connect with your target audience, so you can spend more time selling your products and services, and growing your business.

About SIC Code 431 - U S Postal Service

SIC code 431 refers to the United States Postal Service. This classification encompasses all activities and operations conducted by the U.S. Postal Service, the federal agency responsible for providing mail collection, processing, and delivery services across the nation. This includes the transportation of letters, parcels, periodicals, and packages to residences and businesses, as well as the management of post offices and mail facilities. The U.S. Postal Service also handles specialized services such as registered mail, certified mail, and express delivery, ensuring the secure and timely distribution of correspondence and goods throughout the country and internationally.

Information Included in your List

Your U S Postal Service mailing list includes:

Employee Contact's First & Last Name (if available)Employee's TitleBusiness NameBusiness Postal Mailing AddressCityStateZip codeBusiness Telephone NumberSIC CodeSIC Description

You can choose to add additional information, if needed. For example:

Business URL / WebsiteWoman OwnedSmall BusinessHome OfficeAnnual Sales VolumeYears in BusinessNumber of EmployeesLocation Type: Headquarter, Branch, SinglePublic / Private OwnershipFranchise / Not a FranchiseChain / Not a ChainEmail Address (where available)

Quantity of Leads Available

For the latest count of available leads for SIC code 431 – U S Postal Service, use our live count tool. Counts update in real time and always reflect our most recent data refresh.

How our Business Lists are Compiled: Where the Data comes From

Our business data is compiled from hundreds of public and proprietary sources including federal, state, and local filings, business directories, Secretary of State records, utility connections, and regular direct telephone verification. Records are updated monthly to ensure deliverability.

Deliverability & Accuracy: What to Expect

We guarantee 90%+ mailing address deliverability on all business lists. All addresses are USPS CASS-certified and NCOA-processed. Email addresses are verified and tested before delivery.

Why Businesses Choose LeadsPlease Lists

Why LeadsPlease

  • 98% Accuracy Guaranteed
  • Triple-verified — Automation + Human Review
  • Updated Every Week — 4x Monthly Refresh
  • NCOA Verified Addresses
  • 25 Free Leads — No Credit Card Required
  • 5 Formats: Excel, CSV, PDF, Labels, CRM Push
  • CRM Integrations: Salesforce, HubSpot, Zoho + more
  • Pay-as-you-go + Subscribe & Save (10% off)
  • Voted #1 List Broker — Business.com, 4 Years
  • GDPR + CAN-SPAM + CCPA + TCPA Compliant
  • 24/7 Phone + Live Chat Support
  • Real-Time Email Validation — ZeroBounce
  • ⭐ Google 4.8/5  ·  G2 4.6/5

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Other U S Postal Service Related Businesses

Frequently Asked Questions

SIC code 431 covers all operations of the U.S. Postal Service, including mail collection, processing, sorting, and delivery of letters, parcels, periodicals, and packages, as well as the management of post offices and mail facilities nationwide.

Yes, SIC code 431 encompasses specialized services such as registered mail, certified mail, express delivery, and other secure mail handling options provided by the U.S. Postal Service.

Yes, the U.S. Postal Service's international mail operations, including the shipping and delivery of mail and packages to and from the United States, are included under SIC code 431.

All activities classified under SIC code 431 are managed and operated exclusively by the United States Postal Service, a federal government agency.

No, SIC code 431 specifically refers to the operations of the United States Postal Service. Private mail and courier companies are classified under different SIC codes.

Facilities managed under SIC code 431 include post offices, mail sorting and processing centers, and other related mail handling locations operated by the U.S. Postal Service.

SIC code 431 covers the handling and delivery of all types of mail and packages, including letters, postcards, periodicals, parcels, and express shipments, both domestically and internationally.

No, SIC code 431 pertains only to physical mail and parcel delivery services offered by the U.S. Postal Service, not to electronic mail or digital communication services.

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