Who are AT&T Inc.'s main suppliers?

AT&T Inc. (T) key suppliers include: Ciena Corporation, Curbline Properties Corp., Amdocs Limited, Lumen Technologies, Inc., Lumen Technologies, Inc. and 2 more. View the full supplier network at chainsifter.com/chain/T.

Who are AT&T Inc.'s major customers?

AT&T Inc. (T) key customers include: Qwest Corp. NT, Five9, Inc., Lumen Technologies, Inc., Lumen Technologies, Inc., T-Mobile US, Inc. and 5 more. View the full customer network at chainsifter.com/chain/T.

What sector is AT&T Inc. in?

AT&T Inc. (T) operates in the general sector. ChainSifter tracks its verified supply chain relationships including suppliers, customers, and strategic partners.

AT&T Inc. Supplier List (T): 7 Verified Suppliers

7Suppliers

10Customers

1Debt Items

20Related Chains

Source-Backed Evidence Depth

AT&T Inc. (T) is shown with relationship data already present in ChainSifter's database. Counts below come from stored supply-chain records and filing/source URLs where available; missing source URLs are not filled in or estimated.

19Total relationships

2Distinct source URLs

11High confidence

0.804Average confidence

2026-09-13Latest database update

ChainSifter does not infer unreported suppliers, customers, ownership, acquisitions, debt exposure, revenue dependency, or future supply-chain events on this public page.

AT&T Inc. Suppliers

Ticker	Name	Confidence	Evidence
CIEN	Ciena Corporation	92%	Reciprocal relationship from CIEN graph: Reciprocal relationship from T graph: Reciprocal relationship from CIEN graph: Reciprocal relationship from T graph: Reciprocal relationship from CIEN graph: …
CURB	Curbline Properties Corp.	92%	Reciprocal relationship from CURB graph: The Company’s largest tenants based on the total annualized base rental revenues as of December 31, 2024, were as follows: Tenant % of Shopping Center Base Re…
DOX	Amdocs Limited	92%	Reciprocal relationship from DOX graph: AT&T accounted for 25.9% and 24.5% of our revenue in fiscal years 2025 and 2024, respectively.
LUMN	Lumen Technologies, Inc.	92%	On February 2, 2026, we closed our transaction with Lumen Technologies, Inc. (Lumen) and acquired substantially all of Lumen’s Mass Markets fiber business.
LUMN	Lumen Technologies, Inc.	92%	Reciprocal relationship from LUMN graph: Reciprocal relationship from T graph: Reciprocal relationship from LUMN graph: Reciprocal relationship from T graph: On February 2, 2026, we closed our transa…
DLR	Digital Realty Trust, Inc.	90%	Reciprocal relationship from DLR graph: Reciprocal relationship from T graph: Reciprocal relationship from DLR graph: Reciprocal relationship from T graph: Reciprocal relationship from DLR graph: Rec…
DY	Dycom Industries, Inc.	80%	Reciprocal relationship from DY graph: Customers exceeding 5% of total revenues for Q4 2026 were Brightspeed, Charter, Comcast and Uniti.

AT&T Inc. Customers

Ticker	Name	Confidence	Evidence
CTBB	Qwest Corp. NT	92%	Reciprocal relationship from CTBB graph: In connection with the sale, we have entered into a transition services agreement under which we will provide to AT&T various support services and certain lon…
FIVN	Five9, Inc.	90%	Reciprocal relationship from FIVN graph: Reciprocal relationship from T graph: Reciprocal relationship from FIVN graph: Reciprocal relationship from T graph: Reciprocal relationship from FIVN graph: …
LUMN	Lumen Technologies, Inc.	72%	Reciprocal relationship from LUMN graph: Reciprocal relationship from T graph: Reciprocal relationship from LUMN graph: Reciprocal relationship from T graph: in “Accounts payable and accrued liabilit…
LUMN	Lumen Technologies, Inc.	72%	in “Accounts payable and accrued liabilities.” 23 AT&T INC. MARCH 31, 2026 Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations Dollars in millions except per…
TMUS	T-Mobile US, Inc.	72%	Reciprocal relationship from TMUS graph: Reciprocal relationship from T graph: ns except per share amounts more advanced mobile internet services. Additionally, in November 2024, we agreed to purchas…
TMUS	T-Mobile US, Inc.	72%	ns except per share amounts more advanced mobile internet services. Additionally, in November 2024, we agreed to purchase select spectrum licenses from United States Cellular Corporation (UScellular)…
CROWN-CASTLE-INTERNATIONAL-CORP	CROWN-CASTLE-INTERNATIONAL-CORP	62%	21,039 $ 8,679 $ — 1 Includes initial sales of receivables of $ 1,270 , $ 1,500 and $ 0 for the years ended December 31, 2024, 2023 and 2022, respectively. 2 Receivables net of allowance and other re…
DIRECTV-ENTERTAINMENT-HOLDINGS-LLC	DIRECTV-ENTERTAINMENT-HOLDINGS-LLC	62%	Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations Dollars in millions except per share amounts Operating income increased in the first quarter of 2026. Our…
RESULTS-OF-OPERATIONS-AT-T-INC	RESULTS-OF-OPERATIONS-AT-T-INC	62%	in “Accounts payable and accrued liabilities.” 23 AT&T INC. MARCH 31, 2026 Item 2. Management’s Discussion and Analysis of Financial Condition and Results of Operations Dollars in millions except per…
UNITED-STATES-CELLULAR-CORPORATION	UNITED-STATES-CELLULAR-CORPORATION	62%	ns except per share amounts more advanced mobile internet services. Additionally, in November 2024, we agreed to purchase select spectrum licenses from United States Cellular Corporation (UScellular)…

AT&T Inc. Debt Obligations

Instrument	Description	Confidence	Evidence
T-DEBT	Debt stack $159.8B	90%	Market cache reports total debt of $159.8B.

AT&T Inc. Acquisitions

No acquisitions on recordNo completed or pending acquisitions found in our database for AT&T Inc..

AT&T Inc. Ownership

Holder	Name	Confidence	Evidence
T-OWNER-VANGUARD-CAPITAL-MANAGEMENT-LLC	VANGUARD CAPITAL MANAGEMENT LLC	90%	13F overlay lists VANGUARD CAPITAL MANAGEMENT LLC as top holder; 2971 tracked holders.

AT&T Inc. Extended Supply Chain Network

Ticker	Name	Chain Index	Hops	Relationship Types
CCOI	Cogent Communications Holdings, Inc.	100.00	2
RNG	RingCentral, Inc.	100.00	2
LUMN	Lumen Technologies, Inc.	100.00	1	['customer', 'supplier']
NOK	Nokia Oyj	100.00	2
QVCGA	QVC Group Inc.	100.00	2
VIAV	Viavi Solutions Inc.	100.00	2
DLR	Digital Realty Trust, Inc.	100.00	1	['supplier']
CTBB	Qwest Corp. NT	100.00	1	['customer']
LBRDK	Liberty Broadband Corporation	100.00	2
CURB	Curbline Properties Corp.	100.00	1	['supplier']
DTEGY	Deutsche Telekom AG	100.00	2
TMUSI	T-Mobile US, Inc. 5.500% Senior Notes due June 2070	100.00	2
AKAM	Akamai Technologies, Inc.	100.00	2
DOX	Amdocs Limited	100.00	1	['supplier']
ACN	Accenture plc	100.00	2
CIEN	Ciena Corporation	100.00	1	['supplier']
DY	Dycom Industries, Inc.	100.00	1	['supplier']
TPICQ	TPI Composites, Inc.	100.00	2
CHTR	Charter Communications, Inc.	100.00	2
CDW	CDW Corporation	100.00	2

AT&T Inc. Supply Chain