334210 — Telephone Apparatus Manufacturing
Description
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. Examples of products made by these establishments are central office switching equipment, cordless and wire telephones (except cellular), PBX equipment, telephone answering machines, LAN modems, multi-user modems, and other data communications equipment, such as bridges, routers, and gateways (as defined in the official U.S. Census Bureau 2022 NAICS Manual).
Exclusions & Cross-References
- Manufacturing internal and external computer modems, single-user fax/modems, and electronic
- components used in telephone apparatus--are classified in Industry 33441, Semiconductor and Other
- Electronic Component Manufacturing; and
- Manufacturing cellular telephones--are classified in Industry 334220, Radio and Television Broadcasting
- and Wireless Communications Equipment Manufacturing.
Overview Facts
Legacy SIC Concordance
Trace the historical mapping chain from the 1987 Standard Industrial Classification (SIC) to the modern 2022 NAICS code format.
- SIC 3661 - Telephone and Telegraph Apparatus (via SIC1987:3661→NAICS1997:33421→2002:334210→2007:334210→2012:334210→2017:334210→2022:334210)
Suggested Product Service Codes (Advisory)
The following Product Service Codes (PSCs) are advisory suggestions aligned with this NAICS code. Note: NAICS and PSC codes map to different dimensions of procurement (industry vs. product/service). There is no official binding 1:1 crosswalk.
- PSC 5805 — Telephone and Telegraph Equipment
Source: DoD DPCAP PSC Selection Tool (Ingested: 2026-06-29)
Frequently Asked Questions (FAQ)
Is NAICS code 334210 valid in 2022? ▾
Yes, 334210 is a valid 6-digit 2022 NAICS national industry code representing 'Telephone Apparatus Manufacturing' under Sector 31-33 in the official classification index.
What is the SBA size standard for NAICS code 334210? ▾
The Small Business Administration (SBA) has established a small business size standard of 1,250 employees for NAICS code 334210 (Telephone Apparatus Manufacturing), calculated based on employees.
What is the legacy SIC equivalent for NAICS 334210? ▾
According to official Census Bureau concordance tables, NAICS code 334210 (Telephone Apparatus Manufacturing) maps to legacy 1987 Standard Industrial Classification (SIC) codes: 3661 - Telephone and Telegraph Apparatus.
Related Pages & Tools
Further regulatory reference links for NAICS code 334210:
- Sector 31-33 Directory Hub — List of related industries in the Manufacturing sector.
- SIC ↔ NAICS Crosswalk Tool — Look up mappings between legacy SIC codes and modern classifications.
- NAICS 334210 to SIC Crosswalk — Bidirectional mapping to legacy SIC codes (Telephone Apparatus Manufacturing).
- SBA Size Standards Guide — Complete rules and averaging periods for small business classifications.
- Calculating Annual Receipts Guide — Detailed worked example of revenue calculation rules.
- IRS Principal Business Activity Guide — How NAICS codes map to corporate and entity tax filings.