SICCODE.comSIC LookupD Manufacturing36 Electronic and other Electrical Equipment and Components, except Computer Equipment366 Communications EquipmentSIC 3669
SIC Code 3669 – Communications Equipment, Not Elsewhere Classified
Official 4-digit SIC code Source: OSHA SIC Manual Updated Nov 13, 2026
At a glance
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Related NAICS
Which businesses belong in SIC 3669?
Usually classified in SIC 3669
- Burglar alarm apparatus, electric
- Fire alarm apparatus, electric
- Fire detection systems, electric
- Highway signals, electric
- Intercommunications equipment, electronic
Official definition for SIC 3669 - Communications Equipment, Not Elsewhere Classified
Establishments primarily engaged in manufacturing communications and related equipment, not elsewhere classified. Important products of this industry are intercommunication equipment, traffic signaling equipment, and fire and burglar alarm apparatus.
Source: OSHA SIC Manual
Companies in SIC 3669 - Communications Equipment, Not Elsewhere Classified
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Preview · details masked| Company | Contact & title | Website | Phone | Employees |
|---|---|---|---|---|
| Telamon Corp Carmel, IN | ||||
| AltiGen Communications Inc San Jose, CA | ||||
| Lumentum Holdings Inc Milpitas, CA |
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Telamon Corp · Carmel, IN
Contact Website Phone Employees -
AltiGen Communications Inc · San Jose, CA
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Key facts for SIC 3669 - Communications Equipment, Not Elsewhere Classified
- SIC code
- 3669
- Official title
- Communications Equipment, Not Elsewhere Classified
- Scope
- OSHA SIC Manual, establishment-level
- Division
- D Manufacturing (20–39)
- Industry group
- 366 Communications Equipment
- Official source
- OSHA SIC Manual
- Where SIC is used
- Used on EPA permit forms and in OSHA inspection data, as well as SEC filings and business lists. See which agencies still use SIC codes →
SIC Classification Hierarchy
Four official SIC levels, plus a more detailed commercial classification level.
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Industry · Official 4-Digit 3669 Communications Equipment, Not Elsewhere Classified
One example classification path is shown. Other branches may exist. The 6-digit Marketing Level is a commercial extension, not an official SIC classification.
Other codes in Industry Group 366: 3661 · Telephone and Telegraph Apparatus 3663 · Radio and Television Broadcasting and Communications Equipment
More specific segments in SIC 3669
Segments let you target only the companies you need. Add one or more to your list to get pricing and a free sample.
1,012 U.S. companies across 7 segments · Segment codes are 6-digit marketing categories that extend the official 4-digit SIC code. They are not official SIC codes.
SIC 3669 is in your list, which already includes all 7 segments.
| Code | Segment | Companies | Build your list |
|---|---|---|---|
| 3669-01 | Fire Alarm Systems | 79 79 companies | |
| 3669-02 | Security Control Equipment & Systems | 256 256 companies | |
| 3669-03 | Fire Exit Devices | 2 2 companies | |
| 3669-04 | Signals | 22 22 companies | |
| 3669-05 | Traffic Signs Signals & Equipment | 63 63 companies | |
| 3669-06 | Burglar Alarm Systems & Monitoring | 267 267 companies | |
| 3669-98 | Communications Equipment NEC | 323 323 companies |
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Example companies in SIC 3669
See how SICCODE.com evaluates businesses using documented activities and official SIC definitions. Select a company to review its classification and the reasoning behind it.
1,003 verified U.S. companies
- IP Video Networks Inc San Diego, CA View classification →
- Infrax Systems Inc Saint Petersburg, FL View classification →
- Novume Solutions Inc Chantilly, VA View classification →
- Harris Corp Palm Bay, FL View classification →
- Honeywell Melville, NY View classification →
- Silent Knight Northford, CT View classification →
- Contemporary Service Morgantown, WV View classification →
- Sectek Inc Reston, VA View classification →
NAICS, ISIC and NACE Rev. 2.1 crosswalk for SIC 3669 - Communications Equipment, Not Elsewhere Classified
Correspondences in NAICS, ISIC and NACE Rev. 2.1 (via ISIC) for SIC 3669 - Communications Equipment, Not Elsewhere Classified. These mappings do not replace the official SIC definition.
| System | Code | Title |
|---|---|---|
| SIC This page | 3669 | Communications Equipment, Not Elsewhere Classified |
| NAICS | 334290 | Other Communications Equipment Manufacturing Other Communications Equipment Manufacturing |
| ISIC Rev. 4 | 2630 | Manufacture Of Communication Equipment Manufacture Of Communication Equipment |
| ISIC Rev. 4 | 2651 | Manufacture Of Measuring, Testing, Navigating And Control Equipment Manufacture Of Measuring, Testing, Navigating And Control Equipment |
| ISIC Rev. 4 | 2790 | Manufacture Of Other Electrical Equipment Manufacture Of Other Electrical Equipment |
| ISIC Rev. 4 | 3020 | Manufacture Of Railway Locomotives And Rolling Stock Manufacture Of Railway Locomotives And Rolling Stock |
| NACE Rev. 2.1 (via ISIC 2630) | 26.30 | Manufacture of communication equipment Manufacture of communication equipment |
| NACE Rev. 2.1 (via ISIC 2651) | 26.51 | Manufacture of instruments and appliances for measuring, testing and navigation Manufacture of instruments and appliances for measuring, testing and navigation |
| NACE Rev. 2.1 (via ISIC 2790) | 27.90 | Manufacture of other electrical equipment Manufacture of other electrical equipment |
| NACE Rev. 2.1 (via ISIC 3020) | 30.20 | Manufacture of railway locomotives and rolling stock Manufacture of railway locomotives and rolling stock |
Source: Eurostat, NACE Rev. 2.1 to ISIC Rev. 5 correspondence; United Nations Statistics Division, ISIC Rev. 4 to ISIC Rev. 5 correspondence table.
Sources for SIC 3669
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Official classification source U.S. Occupational Safety and Health Administration.
Standard Industrial Classification Manual (1987), SIC 3669. OSHA SIC Manual → -
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About this classification
This page combines the official SIC definition with classification analysis, crosswalks, and SICCODE.com commercial data. Classifications are reviewed regularly by the Industry Classification Review Team.