# NAICS 561431: Private Mail Centers

Breadcrumb: [NAICS codes](https://bidrover.com/naics) › [561431 Private Mail Centers](https://bidrover.com/naics/561431)

This U.S. industry comprises (1) establishments primarily engaged in providing mailbox rental and other postal and mailing (except direct mail advertising) services or (2) establishments engaged in providing these mailing services along with one or more other office support services, such as facsimile services, word processing services, on-site PC rental services, and office product sales.

- NAICS code: 561431
- Title: Private Mail Centers
- Sector: 56 Administrative and Support and Waste Management and Remediation Services
- Subsector: 561 Administrative and Support Services
- Industry group: 5614 Business Support Services
- NAICS industry: 56143 Business Service Centers
- SBA size standard: $19 million average annual receipts
- Open bids on BidRover: 0

## Open bids (0)

No open bids cite this code right now.

## Frequently asked questions

### What is NAICS code 561431?

NAICS 561431 is "Private Mail Centers" in the 2022 North American Industry Classification System, in sector 56 (Administrative and Support and Waste Management and Remediation Services). This U.S. industry comprises (1) establishments primarily engaged in providing mailbox rental and other postal and mailing (except direct mail advertising) services or (2) establishments engaged in providing these mailing services along with one or more other office support services, such as facsimile services, word processing services, on-site PC rental services, and office product sales.

### What is the SBA size standard for NAICS 561431?

A business is small under NAICS 561431 at or below $19 million average annual receipts, including affiliates (13 CFR 121.201). Confirm the standard named in each solicitation.

### How many government bids are open under NAICS 561431?

No open bid in BidRover cites NAICS 561431 right now. Many state and local notices do not list a NAICS code, so a keyword alert for this work catches more of them.

### How do I get alerts for NAICS 561431 bids?

Save an alert on this page. A free account gets new matching bids by weekly email; the Team plan ($19/mo) sends daily alerts with match scores, the buyer, source link and documents.

## Related NAICS codes

- [491110 Postal Service](https://bidrover.com/naics/491110)
- [561421 Telephone Answering Services](https://bidrover.com/naics/561421)
- [541860 Direct Mail Advertising](https://bidrover.com/naics/541860)
- [531120 Lessors of Nonresidential Buildings (except Miniwarehouses)](https://bidrover.com/naics/531120)
- [561439 Other Business Service Centers (including Copy Shops)](https://bidrover.com/naics/561439)
- [561410 Document Preparation Services](https://bidrover.com/naics/561410)
- [561422 Telemarketing Bureaus and Other Contact Centers](https://bidrover.com/naics/561422)
- [561440 Collection Agencies](https://bidrover.com/naics/561440)

---

Code titles and definitions: U.S. Census Bureau, North American Industry Classification System (NAICS), 2022 (https://www.census.gov/naics/). Size standards: U.S. Small Business Administration, Small Business Size Standards, 13 CFR 121.201, eCFR text current as of 2026-10-21 (https://www.ecfr.gov/current/title-13/section-121.201).

BidRover lists bids from official public sources. It is not an issuing authority; confirm the NAICS code and size standard named in each solicitation.