At&T - Corporate Headquarters

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

• Telephones Communications Services

North American Industry Classification System (NAICS) Categories:

• Wired Telecommunications Carriers > Local & Long Distance Telephone Service

Standard Industry Classification (SIC) Categories:

• Telephone Communications, Except Radio > Local & Long Distance Telephone Service