NAICS Code 517121 — Telecommunications Resellers

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is one of 2 national industries under 51712 (Telecommunications Resellers and Agents for Wireless Telecommunication Services).

Code	517121
Title	Telecommunications Resellers
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	1,500 employees

Official definition (2022 NAICS)

This U.S. industry comprises establishments engaged in purchasing access and network capacity from owners and operators of telecommunications networks and reselling wired and wireless telecommunications services to businesses and households (except satellite telecommunications and agents for wireless telecommunications services). Establishments in this industry resell telecommunications; they do not operate transmission facilities and infrastructure.

Illustrative Examples:

Mobile virtual network operators (MVNOs) (except agents)

Pre-paid calling cards, telecommunications resellers

Wired telecommunications resellers

Wireless telecommunications resellers (except satellite telecommunications and agents)

Is a business under 517121 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 517121 qualifies as a small business if it does not exceed 1,500 employees. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — employee count is averaged over the latest 24 months.

Where 517121 sits in the hierarchy

Level	Code	Title
Sector	51	Information
Subsector	517	Telecommunications
Industry Group	5171	Wired and Wireless Telecommunications (except Satellite)
NAICS Industry	51712	Telecommunications Resellers and Agents for Wireless Telecommunication Services
National Industry	517121	Telecommunications Resellers

No direct SIC mapping is shown for this code: it was introduced or redefined after the official 1987 SIC ↔ 2002 NAICS concordance. Use the crosswalk tool to explore related legacy codes.

Related National Industry codes

• 517122 — Agents for Wireless Telecommunications Services

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.