NAICS 523991
Trust, Fiduciary, and Custody Activities
RampedUp holds 3,679 professional profiles classified to 2022 NAICS 523991 as of the build — 0.0% of all profiles carrying a NAICS classification. Of those, 1,874 carry a professional email address and 470 carry a mobile number. Ranked #330 of 370 codes.
What NAICS 523991 covers
This U.S. industry comprises establishments primarily engaged in providing trust, fiduciary, and custody services to others, as instructed, on a fee or contract basis, such as bank trust offices and escrow agencies (except real estate). Cross-References.
Official 2022 NAICS definition. Sector 52 — Finance and Insurance. Mapped in the RampedUp taxonomy to Trusts and Estates.
What the records carry
Field coverage for NAICS 523991, August 2026 build.
| Field on the record | Records | Share of 523991 | Share across all NAICS |
|---|---|---|---|
| Professional email | 1,874 | 50.9% | 50.8% |
| Personal email | 489 | 13.3% | 16.0% |
| Phone (any) | 2,973 | 80.8% | 89.3% |
| Mobile number | 470 | 12.8% | 13.4% |
| Primary contact record | 3,150 | 85.6% | 63.9% |
| All five present on one record | 90 | 2.4% | 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 523991 by profile count.
| # | Code | Title | Profiles | Professional email |
|---|---|---|---|---|
| 328 | 337920 | Blind and Shade Manufacturing | 3,883 | 1,352 |
| 329 | 332618 | Other Fabricated Wire Product Manufacturing | 3,764 | 1,423 |
| 331 | 221117 | Biomass Electric Power Generation | 3,652 | 1,270 |
| 332 | 327120 | Clay Building Material and Refractories Manufacturing | 3,571 | 1,089 |
Questions about NAICS 523991
What is NAICS code 523991?
523991 — Trust, Fiduciary, and Custody Activities. This U.S. industry comprises establishments primarily engaged in providing trust, fiduciary, and custody services to others, as instructed, on a fee or contract basis, such as bank trust offices and escrow agencies (except real estate). Cross-References.
How many contacts does RampedUp have for NAICS 523991?
3,679 professional profiles as of the August 2026 build, which is 0.0% 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 523991?
1,874 records carry a professional email address (50.9%), 489 a personal email address, 2,973 a phone number and 470 a mobile number.
Need this cross-filtered?
Exact counts for NAICS 523991 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.