At&T

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

• Cellular Telephone Equipment Sales & Service
• Consultants - Communication
• Telephones Communications Services

North American Industry Classification System (NAICS) Categories:

• Wired Telecommunications Carriers > Local & Long Distance Telephone Service
• Wireless Telecommunications Carriers (Except Satellite) > Cellular & Mobile Telephone Service
• All Other Telecommunications
• Engineering Services > Engineers Electrical, Electronic & Communications > Communication Consultants
• Other Management Consulting Services > Communications Consultants
• Other Scientific And Technical Consulting Services > Communications Consultants

Standard Industry Classification (SIC) Categories:

• Radiotelephone Communications > Cellular & Mobile Phone Service Companies
• Telephone Communications, Except Radio > Local & Long Distance Telephone Service
• Communication Services, Nec > Specialty Communication Companies & Services > Communication Consultants
• Electronic Parts & Equipment > Telephone & Telegraphic Equipment > Cellular Telephone Equipment
• Business Consulting Services, Nec > Communications Consultants