At&T

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

• Cellular Telephone Equipment Sales & Service
• Telecommunications Companies
• Teleconferencing Service & Systems
• Telephones Communications Services

North American Industry Classification System (NAICS) Categories:

• Other Electronic Parts And Equipment Merchant Wholesalers > Communication Equipment > Teleconferencing Equipment & Systems
• Wired Telecommunications Carriers > Local & Long Distance Telephone Service
• Wired Telecommunications Carriers > Telecommunications Companies
• Wireless Telecommunications Carriers (Except Satellite) > Cellular & Mobile Telephone Service
• Telephone Answering Services > Telephone Answering & Messenger Services > Teleconferencing Service
• Communication Equipment Repair And Maintenance > Electronic Equipment Repair, Except Computers > Cellular & Mobile Equipment & System Repair

Standard Industry Classification (SIC) Categories:

• Radiotelephone Communications > Cellular & Mobile Phone Service Companies
• Telephone Communications, Except Radio > Local & Long Distance Telephone Service
• Telephone Communications, Except Radio > Telecommunications Companies
• Electronic Parts & Equipment > Telephone & Telegraphic Equipment > Cellular Telephone Equipment
• Electronic Parts & Equipment > Communication Equipment > Teleconferencing Equipment & Systems
• Business Services, Nec > Telephone Answering & Messenger Services > Teleconferencing Service