At&T

At&T is also listed under the following categories: Standard Yellow Pages Heading (SYPH) Categories:

• Telecommunications Contractors
• Telephones Communications Services

North American Industry Classification System (NAICS) Categories:

• Electrical Contractors > Electronic & Communications Contractors > Telecommunications Contractors
• Wired Telecommunications Carriers > Local & Long Distance Telephone Service

Standard Industry Classification (SIC) Categories:

• Electrical Work > Electronic & Communications Contractors > Telecommunications Contractors
• Telephone Communications, Except Radio > Local & Long Distance Telephone Service