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Establishments primarily engaged in manufacturing wire telephone and telegraph equipment. Included are establishments manufacturing modems and other telephone and telegraph communications interface equipment.


SIC Code 3661 - Telephone and Telegraph Apparatus is a final level code of the “Manufacturing” Division. There are 171 companies classified in this industry in the USA with an estimated employment of 12,029 people.

Hierarchy Navigation for SIC Code 3661

Parent Category (less specific)

Industry Examples

Common types of examples within SIC Code 3661 - Telephone and Telegraph Apparatus are:

  • Auto-transformers for telephone switchboards
  • Carrier equipment, telephone and telegraph
  • Communications headgear, telephone
  • Data sets, telephone and telegraph
  • Facsimile equipment
  • Headsets, telephone
  • Message concentrators
  • Modems
  • Multiplex equipment, telephone and telegraph
  • Switchboards, telephone and telegraph
  • Switching equipment, telephone
  • Telegraph office switching equipment
  • Telephone answering machines
  • Telephone central office equipment, dial and manual
  • Telephone dialing devices, automatic
  • Telephone sets, except cellular radio telephone
  • Telephone station equipment and parts, wire
  • Telephones, sound powered (no battery)
  • Telephones underwater
  • Toll switching equipment, telephone

Industry Image

Example photo for industry SIC 3661 - Telephone and Telegraph Apparatus. This image represents an activity or product found in this industry.


For some business types, there may be a similar industry to SIC Code 3661 - Telephone and Telegraph Apparatus that is a better classification match. Establishments primarily engaged in manufacturing cellular radio telephones are classified in Industry 3663.

Companies compiles comprehensive business data and executive contact leads for businesses within SIC Code 3661 - Telephone and Telegraph Apparatus. Some of the leading and most notable companies are listed below. To order a list of companies within SIC Code 3661 - Telephone and Telegraph Apparatus for marketing (postal mailing, telemarketing, emailing) or analytics-use, click on the link below to “Buy Business List”. Our data analysts are standing by to assist in your list setup and target marketing.

Industry Executives

Would you like to email executives in SIC Code 3661 - Telephone and Telegraph Apparatus? Below are some of the common job titles available to be targeted.

  • Business Development
  • Chairman
  • C-Level
  • Director
  • Engineering
  • Executive Director
  • Facilities
  • Finance
  • Human Resource
  • IT
  • Manager
  • Marketing
  • Manufacturing
  • Operations
  • Owner
  • Partner
  • President
  • Principal
  • Purchasing
  • Sales
  • Vice President

For specific job title targeting, please provide details in the business list request form.

Executive Email List

Extended SIC Code Categories for SIC 3661

For business marketing and targeting, SIC Codes have been extended to provide more specific classifications within SIC Code 3661 – Telephone and Telegraph Apparatus. Extended SIC Codes are being continuously updated to reflect the current business environment.

6-digit SIC

  • 366101Telephone Auto Answer Equipment (manufacturers)
  • 366102Telephone Equipment & Systems (manufacturers)
  • 366103Telephone Booths (manufacturers)
  • 366104Modems & Set-Tops (manufacturers)
  • 366198Telephone & Telegraph Apparatus (manufacturers)

7-digit SIC

  • 3661001Telephone & Telegraph Apparatus (manufacturers)
  • 3661002Telephones & Telephone Apparatus
  • 3661003Fiber Optics Communications Equipment
  • 3661004Autotransformers For Telephone Switchboards
  • 3661005Telephone Equipment & Systems (manufacturers)
  • 3661006Telephone Booths (manufacturers)
  • 3661007Communication Headgear, Telephone
  • 3661008Modems & Set-Tops (manufacturers)
  • 3661009Facsimile Equipment
  • 3661010Headsets, Telephone
  • 3661011Modems
  • 3661012Switching Equipment, Telephone
  • 3661013Telephone Auto Answer Equipment (manufacturers)
  • 3661014Telephone Central Office Equipment, Dial Or Manual
  • 3661015Telephone Dialing Devices, Automatic
  • 3661016Telephone Sets, All Types Except Cellular Radio)
  • 3661017Telephone Station Equipment & Parts, Wire
  • 3661018Telephones-Sound Powered
  • 3661019Toll Switching Equipment, Telephone
  • 3661020Telegraph & Related Apparatus
  • 3661021Pox Equipment, Manual Or Automatic
  • 3661022Telegraph Or Telephone Carrier & Repeater Equipment
  • 3661023Telegraph Station Equipment & Parts, Wire
  • 3661024Carrier Equipment, Telephone Or Telegraph
  • 3661025Data Sets, Telephone Or Telegraph
  • 3661026Electronic Secretary
  • 3661027Message Concentrators
  • 3661028Multiplex Equipment, Telephone & Telegraph
  • 3661029Switchboards, Telephone Or Telegraph
  • 3661030Telephone Cords, Jacks, Adapters, Etc

8-digit SIC

  • 36610000Telephone And Telegraph Apparatus
  • 36610100Telephones And Telephone Apparatus
  • 36610101Autotransformers For Telephone Switchboards
  • 36610102Communication Headgear, Telephone
  • 36610103Facsimile Equipment
  • 36610104Headsets, Telephone
  • 36610105Modems
  • 36610106Switching Equipment, Telephone
  • 36610107Telephone Answering Machines
  • 36610108Telephone Central Office Equipment, Dial Or Manual
  • 36610109Telephone Dialing Devices, Automatic
  • 36610110Telephone Sets, All Types Except Cellular Radio
  • 36610111Telephone Station Equipment And Parts, Wire
  • 36610112Telephones, Sound Powered (no Battery)
  • 36610114Toll Switching Equipment, Telephone
  • 36610200Telegraph And Related Apparatus
  • 36610201Pbx Equipment, Manual Or Automatic
  • 36610203Telegraph Or Telephone Carrier And Repeater Equipment
  • 36610204Telegraph Station Equipment And Parts, Wire
  • 36619901Carrier Equipment, Telephone Or Telegraph
  • 36619902Data Sets, Telephone Or Telegraph
  • 36619903Electronic Secretary
  • 36619904Message Concentrators
  • 36619905Multiplex Equipment, Telephone And Telegraph
  • 36619906Switchboards, Telephone Or Telegraph
  • 36619907Telephone Cords, Jacks, Adapters, Etc.
  • 36619908Fiber Optics Communications Equipment