NAICS 561611
Investigation and Personal Background Check Services
RampedUp holds 1,259,327 professional profiles classified to 2022 NAICS 561611 as of the build — 0.5% of all profiles carrying a NAICS classification. Of those, 420,864 carry a professional email address and 120,010 carry a mobile number. Ranked #55 of 370 codes.
What NAICS 561611 covers
This U.S. industry comprises establishments primarily engaged in providing investigation, detective, and personal background check services. Illustrative Examples: Fingerprint services Private detective services Polygraph services Private investigative services (except credit) Cross-References.
Official 2022 NAICS definition. Sector 56 — Administrative and Support and Waste Management and Remediation Services. Mapped in the RampedUp taxonomy to Security and Investigations.
What the records carry
Field coverage for NAICS 561611, August 2026 build.
| Field on the record | Records | Share of 561611 | Share across all NAICS |
|---|---|---|---|
| Professional email | 420,864 | 33.4% | 50.8% |
| Personal email | 136,941 | 10.9% | 16.0% |
| Phone (any) | 1,141,385 | 90.6% | 89.3% |
| Mobile number | 120,010 | 9.5% | 13.4% |
| Primary contact record | 586,985 | 46.6% | 63.9% |
| All five present on one record | 27,205 | 2.2% | 4.5% |
Counts come from the RampedUp August 2026 build. RampedUp's crosswalk maps each 6-digit 2022 NAICS code to exactly one industry in its own taxonomy, so this is that industry's population viewed under the NAICS classification — not a separate tally.
Comparable NAICS codes
The codes ranked either side of 561611 by profile count.
Questions about NAICS 561611
What is NAICS code 561611?
561611 — Investigation and Personal Background Check Services. This U.S. industry comprises establishments primarily engaged in providing investigation, detective, and personal background check services. Illustrative Examples: Fingerprint services Private detective services Polygraph services Private investigative services (except credit) Cross-References.
How many contacts does RampedUp have for NAICS 561611?
1,259,327 professional profiles as of the August 2026 build, which is 0.5% of all profiles carrying a NAICS classification. Counts come from the RampedUp August 2026 build. RampedUp's crosswalk maps each 6-digit 2022 NAICS code to exactly one industry in its own taxonomy, so this is that industry's population viewed under the NAICS classification — not a separate tally.
What contact details are available for NAICS 561611?
420,864 records carry a professional email address (33.4%), 136,941 a personal email address, 1,141,385 a phone number and 120,010 a mobile number.
Need this cross-filtered?
Exact counts for NAICS 561611 on its own. For this code combined with a title level, company size or a required field, ask and we will run it against the live file.