NAICS Code 561431: Private Mail Centers
National industry
SBA small business size standard: $19 million in average annual receipts
Definition
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.
Government contracts for this service: PSC R604 Mailing and Distribution Services
Code facts
- Part of
-
-
56
-
561
-
5614
- 56143
-
5614
-
561
-
56
- Contract awards
- 12 In the last 12 months
- Contract obligations
- $13,521,336 In FY2025
NAICS codes and definitions come from the U.S. Census Bureau, size standards from the SBA and contract spending from SAM.gov/FPDS.
Business activities under NAICS 561431
- Mailbox rental centers, private
- Mailbox rental services combined with one or more other office support services, private
- Parcel mailing services combined with one or more other office support services, private
- Parcel mailing services, private
- Private mail centers
- Private mailbox rental centers
Looking for another activity? Search the NAICS code lookup or browse business activities from A to Z.
Contract obligations by fiscal year
| Fiscal year | Obligated |
|---|---|
| FY2027 To date | -$117,517 |
| FY2026 | $6,059,460 |
| FY2025 | $13,521,336 |
| FY2024 | -$4,197,107 |
| FY2023 | $32,635,443 |
Top contractors by obligations
| Rank | Contractor | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Syscom, Inc. | $1,452,679 | |
| 2 | Postal Strategy Consulting LLC | $842,728 | |
| 3 | Bloomsburie LLC | $698,322 | |
| 4 | Melwood Horticultural Training Center, Inc. | $586,555 | |
| 5 | Warren County Association For Retarded Citizens, Inc. | $572,795 | |
| 6 | Servicesource Inc. | $539,349 | |
| 7 | Allison Payment Systems, LLC | $390,421 | |
| 8 | Nobis Enterprises, Inc. | $303,473 | |
| 9 | Newview Oklahoma, Inc. | $256,050 | |
| 10 | La Poste - SA | $112,552 |
Top funding agencies by obligations
| Rank | Agency | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | Department of Justice | $1,452,679 | |
| 2 | Department of Veterans Affairs | $883,117 | |
| 3 | Department of the Army | $828,845 | |
| 4 | Department of the Navy | $699,195 | |
| 5 | Defense Advanced Research Projects Agency | $586,555 | |
| 6 | Department of the Treasury | $487,167 | |
| 7 | Department of Homeland Security | $443,534 | |
| 8 | Social Security Administration | $303,473 | |
| 9 | Department of State | $172,970 | |
| 10 | Department of Commerce | $52,182 |
Top PSC codes by obligations
| Rank | PSC code | Obligated, FY2026–FY2027 | Share |
|---|---|---|---|
| 1 | R604 Mailing and Distribution Services | $5,189,782 | |
| 2 | R499 Other Professional Services | $586,555 | |
| 3 | R706 Logistics Support Services | $112,552 | |
| 4 | F999 Other Environmental Services, Studies, and Analytical Support | $52,182 | |
| 5 | J075 Maintenance, Repair and Rebuilding of Equipment: Office Supplies and Devices | $873 |
Contract obligations by state
| Rank | Place of performance | Obligated, last 12 months | Share |
|---|---|---|---|
| 1 | Colorado | $1,452,679 | |
| 2 | District of Columbia | $1,014,520 | |
| 3 | Rhode Island | $698,322 | |
| 4 | Virginia | $584,838 | |
| 5 | Mississippi | $572,795 | |
| 6 | Arizona | $550,271 | |
| 7 | Georgia | $303,473 | |
| 8 | Minnesota | $32,225 | |
| 9 | Oklahoma | $13,079 |
Shares are of everything obligated under NAICS 561431 in the last 12 months before deobligations, including work performed abroad or with no place of performance on record.
Contract opportunities
Show 40 more
Latest 50 of 110 listed here. See the rest on GovTribe.
Size standard history
Federal Register rules that named this code
From the NAICS codes each rule's amendments to 13 CFR 121.201 name. Rules that print their size standard tables as images aren't listed.
Quick answers
What is NAICS 561431?
NAICS 561431 is Private Mail Centers, a national industry in NAICS 56, Administrative and Support and Waste Management and Remediation Services.
What is the NAICS code for private mail centers?
The NAICS code for private mail centers is 561431, Private Mail Centers.
What is the NAICS code for mailbox rental centers, private?
The NAICS code for mailbox rental centers, private is 561431, Private Mail Centers.
What is the NAICS code for parcel mailing services, private?
The NAICS code for parcel mailing services, private is 561431, Private Mail Centers.
When did the size standard for NAICS 561431 last change?
The most recent Federal Register rule on record that names NAICS 561431 in the SBA's size standards is "Small Business Size Standards: Adjustment of Monetary-Based Size Standards, Disadvantage Thresholds, and 8(a) Eligibility Thresholds for Inflation" (87 FR 69118), published Nov 17, 2022 and effective Dec 19, 2022.
How much do federal agencies spend under NAICS 561431?
Federal contracts under NAICS 561431 obligated $13,521,336 in fiscal year 2025 and $47,901,615 in fiscal years 2023 through 2027.
Who are the largest contractors under NAICS 561431?
The contractors with the most obligated under NAICS 561431 in fiscal years 2026 and 2027 are Syscom, Inc. ($1,452,679); Postal Strategy Consulting LLC ($842,728); and Bloomsburie LLC ($698,322).
Which agencies buy the most under NAICS 561431?
The agencies that obligated the most under NAICS 561431 in fiscal years 2026 and 2027 are Department of Justice ($1,452,679), Department of Veterans Affairs ($883,117) and Department of the Army ($828,845).
Which PSC codes are used with NAICS 561431?
The PSC codes with the most obligated under NAICS 561431 in fiscal years 2026 and 2027 are R604 Mailing and Distribution Services, R499 Other Professional Services and R706 Logistics Support Services.
Where is the work under NAICS 561431 performed?
By place of performance, the states with the most contract obligations under NAICS 561431 over the last 12 months are Colorado ($1,452,679), the District of Columbia ($1,014,520) and Rhode Island ($698,322).
What is the latest contract opportunity under NAICS 561431?
The latest contract opportunity under NAICS 561431 is Outbound Mail Operations - Notice, pre-solicitation from Federal Emergency Management Agency, posted October 29, 2026.
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