Explore 36 companies in the Telephone Apparatus Manufacturing industry (Manufacturing sector). Filter by Market Cap, P/E Ratio, Dividends, Revenue, Profit Margin and more. NAICS Code 33421 is a North American Industry Classification System (NAICS) 5-digit code that defines a NAICS Industry for Telephone Apparatus Manufacturing. NAICS Code 33421 is not specific. Businesses classified under NAICS 334210 (Telephone Apparatus Manufacturing) are involved in: manufacturing wire telephone and data communications equipment. These products may be stand-alone or board-level components of a larger system. 12 companies in Telephone Apparatus Manufacturing, founded 1918–1983. Graph and download economic data for Producer Price Index by Industry: Telephone Apparatus Manufacturing (PCU334210334210) from Dec 1985 to Jun 2026 about phone, telecom, equipment, manufacturing, PPI, industry, inflation, price index, indexes, price, and USA. This industry comprises establishments primarily engaged in manufacturing wire telephone and data communications equipment. These products may be stand-alone or board-level components of a larger system. This industry comprises establishments primarily engaged in manufacturing wire telephone and data communications equipment. These products may be stand-alone or board-level components of a larger system. Graph and download economic data for Producer Price Index by Industry: Telephone Apparatus Manufacturing: Telephone and Wireline Data Networking Equipment (PCU3342103342100) from Dec 1985 to Jun 2026 about phone, telecom, equipment, manufacturing, PPI, industry, price index, indexes, price, and USA. Telephone Apparatus Manufacturing (NAICS 334210): Free industry research report with SBA lending data, market statistics, and valuation benchmarks. Manufacturing wire telephone and data communications equipment, including cordless and wire telephones, PBX equipment, LAN modems, and other data communications equipment, such as bridges, routers, and gateways are included in NAICS code 334210.