C4 Connections

C4 Connections is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Energy Mgmt & Conservation Consultants
• Telecommunications Contractors

North American Industry Classification System (NAICS) Categories:

• Electrical Contractors > Electronic & Communications Contractors > Telecommunications Contractors
• Other Scientific And Technical Consulting Services > Consultants Energy > Energy Mgmt & Conservation Consultants

Standard Industry Classification (SIC) Categories:

• Electrical Work > Electronic & Communications Contractors > Telecommunications Contractors
• Business Consulting Services, Nec > Consultants Energy > Energy Management & Conservation Consultants