What is SIC code 3661?

SIC code 3661 represents the Telephone & Telegraph Apparatus industry. SIC (Standard Industrial Classification) is a four-digit code system used by the U.S. SEC to classify companies by their primary line of business. There are 11 public companies registered under this code in the SEC EDGAR database.

What is the largest Telephone & Telegraph Apparatus company by revenue?

CIENA CORP is the largest company in the Telephone & Telegraph Apparatus industry by revenue, reporting $2.8B in FY2017 according to its SEC EDGAR 10-K annual filing. Companies in this industry with available XBRL data collectively reported $3.7B in revenue across their most recent fiscal years.

Telephone & Telegraph Apparatus

Q: How many public companies are in the Telephone & Telegraph Apparatus industry?

There are 11 SEC-registered public companies classified under SIC code 3661 (Telephone & Telegraph Apparatus) in the SEC EDGAR database.

SIC 3661 · 11 companies

This page lists all SEC-registered public companies classified under SIC code 3661 (Telephone & Telegraph Apparatus). SIC — Standard Industrial Classification — is a four-digit code system used by the SEC to group companies by their primary line of business. You can also view financial rankings for this industry.

The Telephone & Telegraph Apparatus industry includes 11 SEC-registered public companies. The largest by revenue is CIENA CORP, which reported $2.8B in FY2017. Companies in this industry with available XBRL data collectively reported $3.7B in revenue across their most recent fiscal years.

Company	Ticker	Exchange	State	Filings
ADTRAN Holdings, Inc.	ADTN	NASDAQ	—	1,001
AUDIOCODES LTD	AUDC	NASDAQ	L3	512
CIENA CORP	CIEN	NYSE	MD	1,001
CLEARONE INC	CLRO	NASDAQ	DE	1,010
Clearfield, Inc.	CLFD	NASDAQ	MN	1,000
DNA X, Inc.	SONM	NASDAQ	DE	520
FRANKLIN WIRELESS CORP	FKWL	NASDAQ	NV	403
Fabrinet	FN	NYSE	E9	945
FiEE, Inc.	FIEE	NASDAQ	DE	921
NETGEAR, INC.	NTGR	NASDAQ	DE	1,004
Voip-pal.com Inc	VPLM	OTC	NV	430