What is SIC code 4813?

SIC code 4813 represents the Telephone Communications (No Radiotelephone) 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 34 public companies registered under this code in the SEC EDGAR database.

What is the largest Telephone Communications (No Radiotelephone) company by revenue?

VERIZON COMMUNICATIONS INC is the largest company in the Telephone Communications (No Radiotelephone) industry by revenue, reporting $138.2B in FY2025 according to its SEC EDGAR 10-K annual filing. Companies in this industry with available XBRL data collectively reported $287.3B in revenue across their most recent fiscal years.

Telephone Communications (No Radiotelephone)

Q: How many public companies are in the Telephone Communications (No Radiotelephone) industry?

There are 34 SEC-registered public companies classified under SIC code 4813 (Telephone Communications (No Radiotelephone)) in the SEC EDGAR database.

SIC 4813 · 34 companies

This page lists all SEC-registered public companies classified under SIC code 4813 (Telephone Communications (No Radiotelephone)). 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 Communications (No Radiotelephone) industry includes 34 SEC-registered public companies. The largest by revenue is VERIZON COMMUNICATIONS INC, which reported $138.2B in FY2025. Companies in this industry with available XBRL data collectively reported $287.3B in revenue across their most recent fiscal years.

Company	Ticker	Exchange	State	Filings
AMERICA MOVIL SAB DE CV/	AMXOF	OTC	O5	866
AT&T INC.	T-PC	NYSE	DE	1,012
ATN International, Inc.	ATNI	NASDAQ	DE	1,000
Anterix Inc.	ATEX	NASDAQ	DE	851
BCE INC	BCPPF	OTC	—	871
Crexendo, Inc.	CXDO	NASDAQ	DE	1,000
FULLNET COMMUNICATIONS INC	FULO	OTC	OK	372
GlobalTech Corp	GLTK	OTC	NV	95
HIGH WIRE NETWORKS, INC.	HWNI	OTC	NV	360
IDT CORP	IDT	NYSE	DE	1,002
KT CORP	KT	NYSE	—	829
Lumen Technologies, Inc.	LUMN	NYSE	LA	1,001
MachTen, Inc.	MACT	OTC	DE	37
NIPPON TELEGRAPH & TELEPHONE CORP	NPPXF	OTC	M0	586
NextPlat Corp	NXPLW	NASDAQ	NV	786
Nuvera Communications, Inc.	NUVR	OTC	MN	548
ORANGE	ORANY	OTC	—	910
PERUSAHAAN PERSEROAN PERSERO PT TELEKOMUNIKASI INDONESIA TBK	TLK	NYSE	—	597
PLDT Inc.	PHTCF	OTC	—	1,002
QWEST CORP	CTDD	NYSE	CO	371
SHENANDOAH TELECOMMUNICATIONS CO/VA/	SHEN	NASDAQ	VA	1,000
SWISSCOM AG	SWZCF	OTC	—	132
Solidus Communications, Inc.	SLDC	OTC	NV	158
SurgePays, Inc.	SURG	NASDAQ	NV	447
TELECOM ARGENTINA SA	TCMFF	OTC	—	1,000
TELEFONICA BRASIL S.A.	VIV	NYSE	—	1,000
TELEFONICA S A	TELFY	OTC	U3	1,000
TELENOR ASA	TELNF	OTC	—	125
TELEPHONE & DATA SYSTEMS INC /DE/	TDS-PV	NYSE	DE	1,000
TIM S.A.	TIMB	NYSE	D5	541
TURKCELL ILETISIM HIZMETLERI A S	TKC	NYSE	W8	1,000
Uniti Group Inc.	UNIT	NASDAQ	DE	133
VERIZON COMMUNICATIONS INC	VZ	NYSE	DE	1,001
iQSTEL Inc	IQST	NASDAQ	NV	392