Business Lists and Databases Available for Marketing and Research - Direct Mailing Emailing Calling
SIC Code 4311-01 - Post Offices
Marketing Level - SIC 6-DigitBusiness Lists and Databases Available for Marketing and Research
Total Verified Companies:
4,870
Contact Emails:
327,287
Company Websites:
2,922
Phone Numbers:
4,764
Business Addresses:
4,870
Companies with Email:
3,421
Reach new customers, connect with decision makers, and grow your business. Pricing from $0.05 to $0.30 per lead.
Last Updated: 04/30/2025
Ideal for: Direct Mailing Email Campaigns Calling Market Research
‐
Free Sample & Report, Custom Lists, and Expert Support — All Included
About Database:
- Continuously Updated Business Database
- Phone-Verified Twice Annually
- Monthly NCOA Processing via USPS
- Compiled using national directory assistance data, annual reports, SEC filings, corporate registers, public records, new business phone numbers, online information, government registrations, legal filings, telephone verification, self-reported business information, and business directories.
Every purchased list is personally double verified by our Data Team using complex checks and scans.
Looking for more companies? See SIC 4311 - United States Postal Service - 4,870 companies, 327,287 emails.
SIC Code 4311-01 Description (6-Digit)
Post Offices are establishments that provide postal services to the public. These services include the sending and receiving of mail and packages, as well as the sale of postage stamps and other mailing supplies. Post Offices are typically operated by government agencies, such as the United States Postal Service, and are located in various communities throughout the country. The primary function of Post Offices is to facilitate the delivery of mail and packages to their intended recipients in a timely and efficient manner.
Parent Code - Official US OSHA
Official 4‑digit SIC codes serve as the parent classification used for government registrations and OSHA documentation. The marketing-level 6‑digit SIC codes extend these official classifications with refined segmentation for more precise targeting and detailed niche insights. Related industries are listed under the parent code, offering a broader view of the industry landscape. For further details on the official classification for this industry, please visit the OSHA SIC Code 4311 page
Tools
- Postal scales
- Mailboxes
- Sorting machines
- Barcode scanners
- Label printers
- Hand trucks
- Letter openers
- Tape dispensers
- Envelope sealers
- Postage meters
Industry Examples of Post Offices
- Postal service
- Mail delivery
- Package delivery
- Mailing supplies
- Stamps
- Postcards
- Priority mail
- Express mail
- Certified mail
- International mail