NAICS 561621
Security Systems Services (except Locksmiths)
RampedUp holds 69,178 professional profiles classified to 2022 NAICS 561621 as of the build — 0.0% of all profiles carrying a NAICS classification. Of those, 32,321 carry a professional email address and 8,878 carry a mobile number. Ranked #155 of 370 codes.
What NAICS 561621 covers
This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems. Cross-References. Establishments primarily engaged in--
Official 2022 NAICS definition. Sector 56 — Administrative and Support and Waste Management and Remediation Services. Mapped in the RampedUp taxonomy to Security Systems Services.
What the records carry
Field coverage for NAICS 561621, August 2026 build.
| Field on the record | Records | Share of 561621 | Share across all NAICS |
|---|---|---|---|
| Professional email | 32,321 | 46.7% | 50.8% |
| Personal email | 9,216 | 13.3% | 16.0% |
| Phone (any) | 62,402 | 90.2% | 89.3% |
| Mobile number | 8,878 | 12.8% | 13.4% |
| Primary contact record | 49,012 | 70.8% | 63.9% |
| All five present on one record | 2,479 | 3.6% | 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 561621 by profile count.
Questions about NAICS 561621
What is NAICS code 561621?
561621 — Security Systems Services (except Locksmiths). This U.S. industry comprises establishments primarily engaged in (1) selling security alarm systems, such as burglar and fire alarms, along with installation, repair, or monitoring services or (2) remote monitoring of electronic security alarm systems. Cross-References. Establishments primarily engaged in--
How many contacts does RampedUp have for NAICS 561621?
69,178 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 561621?
32,321 records carry a professional email address (46.7%), 9,216 a personal email address, 62,402 a phone number and 8,878 a mobile number.
Need this cross-filtered?
Exact counts for NAICS 561621 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.