Top 100 Contractors in NAICS 517: Telecommunications, FY2021

Name: Top 100 Contractors in NAICS 517: Telecommunications, FY2021
Creator: GovTribe
License: https://creativecommons.org/licenses/by/4.0/

Parent companies by net contract obligations Oct 1, 2020 – Sep 30, 2021 Code page on GovTribe

The top 10 won 42% of FY2021 NAICS 517 contract dollars

Contract obligations: $5,475,825,242 Net of deobligations, by contracts coded NAICS 517 or a code under it
Contractors: 1,363 Parent companies with an obligation
Largest contractor: At&T Inc. $778 million, 12.1% of obligations
Data as of: Oct 14, 2026

Contract actions from FPDS (SAM.gov). How the rankings work · Download all 100 rows as CSV · Free to reuse with credit to GovTribe (CC BY 4.0)

Full ranking

Rank	Contractor	Net obligations	Share	Trend
1	At&T Inc. 48 awardees, including At&T Enterprises, LLC, At&T Technical Services Company, Inc. and At&T Mobility National Accounts LLC Top agencies VA (Department of Veterans Affairs) Treasury (Department of the Treasury) DHS (Department of Homeland Security)	$778,332,313	12.1%	Rank history: #1 in FY2022, #1 in FY2023, #1 in FY2024 and #1 in FY2025; up 1 since FY2020.
2	Verizon Communications Inc. 21 awardees, including Verizon Business Network Services LLC, Cellco Partnership and Verizon Federal Inc. Top agencies HHS (Department of Health and Human Services) Treasury (Department of the Treasury) Army (Department of the Army)	$335,857,127	5.2%	Rank history: #2 in FY2022, #2 in FY2023, #45 in FY2024 and not on the FY2025 list; down 1 since FY2020.
3	Lumen Technologies, Inc. 37 awardees, including Lumen Technologies Government Solutions, Inc., Level 3 Communications, LLC and Level 3 Telecom Holdings, LLC Top agencies VA (Department of Veterans Affairs) DISA (Defense Information Systems Agency) DOI (Department of the Interior)	$298,420,828	4.6%	Rank history: #3 in FY2022, #3 in FY2023, #3 in FY2024 and #42 in FY2025; unchanged since FY2020.
4	CACI International Inc. 4 awardees, including Caci Nss, LLC and LGS Innovations LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$245,898,936	3.8%	Rank history: #4 in FY2022, #5 in FY2023, #26 in FY2024 and #6 in FY2025; up 1 since FY2020.
5	HP Enterprise Services LLC 6 awardees, including Peraton Inc., Peraton Government Communications Inc. and Peraton Enterprise Solutions LLC Top agencies NASA (National Aeronautics and Space Administration) ED (Department of Education) USAF (Department of the Air Force)	$237,473,599	3.7%	Rank history: #5 in FY2022, #4 in FY2023, #19 in FY2024 and not on the FY2025 list; up 3 since FY2020.
6	Iridium Satellite LLC 3 awardees, including Iridium Government Services LLC Top agencies DISA (Defense Information Systems Agency)	$206,957,877	3.2%	Rank history: #13 in FY2022, #8 in FY2023 and not on the FY2024–FY2025 lists; up 50 since FY2020.
7	General Dynamics Corporation 5 awardees, including General Dynamics Information Technology, Inc. and General Dynamics Mission Systems, Inc. Top agencies Army (Department of the Army) DHS (Department of Homeland Security) USAF (Department of the Air Force)	$168,543,718	2.6%	Rank history: #10 in FY2022, #17 in FY2023, #27 in FY2024 and #11 in FY2025; up 2 since FY2020.
8	RTX Corporation 6 awardees, including Raytheon Company and Arinc Incorporated Top agencies Commerce (Department of Commerce) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$159,300,179	2.5%	Rank history: #29 in FY2022, #43 in FY2023, #77 in FY2024 and not on the FY2025 list; up 12 since FY2020.
9	Leonardo S.p.A. 2 awardees, including Global Enterprise Solutions, Inc. Top agencies USSOCOM (United States Special Operations Command) Army (Department of the Army) DHS (Department of Homeland Security)	$137,094,992	2.1%	Rank history: #43 in FY2022 and not on the FY2023–FY2025 lists; down 2 since FY2020.
10	Lockheed Martin Corporation 5 awardees, including Lockheed Martin Services, LLC and Lockheed Martin Global, Inc. Top agencies USAF (Department of the Air Force)	$116,644,851	1.8%	Rank history: #6 in FY2022, #7 in FY2023, #6 in FY2024 and #8 in FY2025; up 3 since FY2020.
11	Stratos Government Services, Inc. Through Inmarsat Government, Inc. Top agencies Navy (Department of the Navy) Army (Department of the Army) Commerce (Department of Commerce)	$111,105,693	1.7%	Rank history: #9 in FY2022, #11 in FY2023, #39 in FY2024 and not on the FY2025 list; unchanged since FY2020.
12	Telos Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$107,045,309	1.7%	Rank history: #21 in FY2022, #44 in FY2023, #90 in FY2024 and #88 in FY2025; up 7 since FY2020.
13	Viasat Inc. 2 awardees, including Rignet, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$106,548,103	1.7%	Rank history: #8 in FY2022, #9 in FY2023, #14 in FY2024 and #16 in FY2025; down 3 since FY2020.
14	SES Government Solutions Inc. 2 awardees, including SES Space & Defense, Inc. Top agencies Army (Department of the Army) USAF (Department of the Air Force) USAGM (US Agency for Global Media)	$96,364,787	1.5%	Rank history: #18 in FY2022, #16 in FY2023, #25 in FY2024 and not on the FY2025 list; up 36 since FY2020.
15	SMS Data Products Group Inc. Top agencies USAF (Department of the Air Force)	$95,954,410	1.5%	Rank history: #11 in FY2022, #13 in FY2023, #21 in FY2024 and #72 in FY2025; down 1 since FY2020.
16	L3Harris Technologies, Inc. 7 awardees, including L3Harris Technologies Integrated Systems L.P. and L3 Technologies, Inc. Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) Army (Department of the Army)	$86,406,475	1.3%	Rank history: #12 in FY2022, #18 in FY2023, #11 in FY2024 and #15 in FY2025; up 9 since FY2020.
17	Booz Allen Hamilton Holding Corporation Through Booz Allen Hamilton Inc. Top agencies USAF (Department of the Air Force) NSA (Department of Defense National Security Agency) Navy (Department of the Navy)	$83,749,729	1.3%	Rank history: #15 in FY2022, #10 in FY2023, #9 in FY2024 and #36 in FY2025; up 5 since FY2020.
18	T-Mobile US Inc. 6 awardees, including T-Mobile Usa, Inc., T-Mobile Secure Federal Operations LLC and Sprint Communications Co LP Top agencies DISA (Defense Information Systems Agency) VA (Department of Veterans Affairs) DHS (Department of Homeland Security)	$70,771,450	1.1%	Rank history: #41 in FY2022, #39 in FY2023, #50 in FY2024 and not on the FY2025 list; up 39 since FY2020.
19	Widepoint Corporation Through Widepoint Integrated Solutions Corp Top agencies DHS (Department of Homeland Security)	$69,829,190	1.1%	Rank history: #19 in FY2022, #12 in FY2023, #13 in FY2024 and not on the FY2025 list; up 19 since FY2020.
20	Indyne, Inc. Top agencies USAF (Department of the Air Force) MDA (DOD Missile Defense Agency)	$69,565,477	1.1%	Rank history: #16 in FY2022, #15 in FY2023, #15 in FY2024 and #14 in FY2025; up 3 since FY2020.
21	Abacus Technology Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$60,106,965	0.9%	Rank history: #25 in FY2022, #21 in FY2023, #24 in FY2024 and #71 in FY2025; up 18 since FY2020.
22	Artel LLC Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$59,723,927	0.9%	Rank history: #26 in FY2022, #20 in FY2023, #16 in FY2024 and #26 in FY2025; up 29 since FY2020.
23	Perspecta Inc. Through Peraton Enterprise Solutions LLC Top agencies USAF (Department of the Air Force) ED (Department of Education) Army (Department of the Army)	$59,566,232	0.9%	Rank history: not on the FY2022–FY2025 lists; down 8 since FY2020.
24	The Boeing Company 4 awardees, including Boeing Comsatcom Services, Inc. and Tapestry Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$58,085,507	0.9%	Rank history: #20 in FY2022, #14 in FY2023, #18 in FY2024 and #24 in FY2025; up 17 since FY2020.
25	Advanced Technology Systems Inc. Through Salient Federal Solutions, Inc. Top agencies Army (Department of the Army)	$57,028,013	0.9%	Rank history: #65 in FY2022, #22 in FY2023, #63 in FY2024 and not on the FY2025 list; down 8 since FY2020.
26	CDO Technologies Inc. Top agencies USAF (Department of the Air Force)	$50,319,833	0.8%	Rank history: #42 in FY2022, #59 in FY2023, #99 in FY2024 and not on the FY2025 list; up 7 since FY2020.
27	Northrop Grumman Corporation 6 awardees, including Northrop Grumman Systems Corporation Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOT (Department of Transportation)	$49,335,351	0.8%	Rank history: #27 in FY2022, #25 in FY2023, #35 in FY2024 and #52 in FY2025; down 3 since FY2020.
28	American Systems Corporation Top agencies USAF (Department of the Air Force) GSA (General Services Administration) DHS (Department of Homeland Security)	$48,123,039	0.7%	Rank history: #44 in FY2022, #33 in FY2023, #46 in FY2024 and not on the FY2025 list; down 10 since FY2020.
29	Lumen Technologies Government Solutions, Inc. 4 awardees Top agencies DISA (Defense Information Systems Agency) VA (Department of Veterans Affairs) FEC (Federal Election Commission)	$46,277,974	0.7%	Rank history: #17 in FY2022, #96 in FY2023, #7 in FY2024 and #3 in FY2025; up 18 since FY2020.
30	Granite Telecommunications, LLC Top agencies USAF (Department of the Air Force) Navy (Department of the Navy) DHA (Defense Health Agency)	$39,243,246	0.6%	Rank history: #36 in FY2022, #50 in FY2023, #48 in FY2024 and #54 in FY2025; up 32 since FY2020.
31	Sumaria Systems, LLC Top agencies USAF (Department of the Air Force)	$38,229,601	0.6%	Rank history: #58 in FY2022, #68 in FY2023, #96 in FY2024 and not on the FY2025 list; up 5 since FY2020.
32	At&T Enterprises, LLC 2 awardees Top agencies Treasury (Department of the Treasury) HUD (Department of Housing and Urban Development) VA (Department of Veterans Affairs)	$38,026,336	0.6%	Rank history: not on the FY2022–FY2023 lists, #31 in FY2024 and #30 in FY2025; down 20 since FY2020.
33	Valdez International Corporation Top agencies USAF (Department of the Air Force)	$37,605,721	0.6%	Rank history: #40 in FY2022, #31 in FY2023, #40 in FY2024 and not on the FY2025 list; up 2 since FY2020.
34	Technica Corporation Top agencies USAF (Department of the Air Force) ED (Department of Education) Navy (Department of the Navy)	$36,549,041	0.6%	Rank history: #37 in FY2022, #32 in FY2023, #85 in FY2024 and not on the FY2025 list; down 3 since FY2020.
35	LGS Innovations LLC Top agencies Army (Department of the Army)	$34,599,156	0.5%	Rank history: #68 in FY2022 and not on the FY2023–FY2025 lists; new, not ranked in FY2020.
36	Tsymmetry Inc. Top agencies DOS (Department of State)	$34,442,758	0.5%	Rank history: #45 in FY2022, #27 in FY2023, #28 in FY2024 and #59 in FY2025; up 4 since FY2020.
37	Arlington Capital Partners IV, L.P. 3 awardees, including Tyto Athene, LLC, Tyto Government Solutions Inc. and Mutual Telecom Services Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$34,133,593	0.5%	Rank history: #38 in FY2022, #69 in FY2023 and not on the FY2024–FY2025 lists; down 9 since FY2020.
38	Manhattan Telecommunications Corporation LLC Top agencies SSA (Social Security Administration) Navy (Department of the Navy) USDA (Department of Agriculture)	$33,706,000	0.5%	Rank history: #31 in FY2022, #19 in FY2023, #17 in FY2024 and #20 in FY2025; up 22 since FY2020.
39	Kbr, Inc. Through KBR Wyle Services, LLC Top agencies NASA (National Aeronautics and Space Administration)	$30,916,212	0.5%	Rank history: #35 in FY2022, #29 in FY2023, #67 in FY2024 and not on the FY2025 list; down 2 since FY2020.
40	Avaya Federal Solutions Inc. 2 awardees Top agencies SSA (Social Security Administration) Army (Department of the Army)	$28,535,335	0.4%	Rank history: #23 in FY2022, #23 in FY2023, #36 in FY2024 and #29 in FY2025; up 6 since FY2020.
41	Global Telecom & Technology Inc. 3 awardees, including GTT Global Telecom Government Services, LLC and GTT Americas, LLC Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$26,800,445	0.4%	Rank history: #30 in FY2022, #87 in FY2023, #62 in FY2024 and not on the FY2025 list; down 14 since FY2020.
42	Leidos Holdings, Inc. 5 awardees, including Leidos, Inc. Top agencies DISA (Defense Information Systems Agency) Army (Department of the Army) Navy (Department of the Navy)	$26,603,923	0.4%	Rank history: #34 in FY2022 and not on the FY2023–FY2025 lists; down 38 since FY2020.
43	BT North America Inc. 2 awardees, including 22Nd Century Networks, Inc. and British Telecommunications Public Limited Company Top agencies Army (Department of the Army) USAF (Department of the Air Force) Navy (Department of the Navy)	$26,136,470	0.4%	Rank history: #54 in FY2022 and not on the FY2023–FY2025 lists; down 13 since FY2020.
44	Verizon Business Network Services LLC Top agencies DISA (Defense Information Systems Agency) DOL (Department of Labor) Commerce (Department of Commerce)	$25,768,772	0.4%	Rank history: not on the FY2022–FY2025 lists; up 34 since FY2020.
45	Cogitan LLC Top agencies USAF (Department of the Air Force)	$24,188,448	0.4%	Rank history: #46 in FY2022, not on the FY2023 list, #47 in FY2024 and #38 in FY2025; up 4 since FY2020.
46	Microtechnologies LLC 2 awardees, including Defined Technologies, LLC Top agencies USAF (Department of the Air Force) DHA (Defense Health Agency) Navy (Department of the Navy)	$23,641,078	0.4%	Rank history: #24 in FY2022, #26 in FY2023, #88 in FY2024 and not on the FY2025 list; down 17 since FY2020.
47	Ritenet Corp. Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) DHS (Department of Homeland Security)	$22,873,927	0.4%	Rank history: #52 in FY2022, #37 in FY2023, #42 in FY2024 and #34 in FY2025; up 7 since FY2020.
48	Full Spectrum Operations LLC Top agencies USAF (Department of the Air Force)	$21,451,880	0.3%	Rank history: #32 in FY2022, not on the FY2023 list, #30 in FY2024 and #21 in FY2025; new, not ranked in FY2020.
49	Valkyrie Enterprises, LLC 2 awardees Top agencies USAF (Department of the Air Force) Army (Department of the Army) Navy (Department of the Navy)	$21,045,258	0.3%	Rank history: #56 in FY2022, #42 in FY2023 and not on the FY2024–FY2025 lists; down 4 since FY2020.
50	Core Technologies, LLC Top agencies DHA (Defense Health Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$21,044,435	0.3%	Rank history: #33 in FY2022, #53 in FY2023, #61 in FY2024 and not on the FY2025 list; up 82 since FY2020.
51	National Capitol Contracting LLC 28 awardees, including Comcast Government Services LLC, Comcast Business Communications, LLC and Comcast Cable Communications, LLC Top agencies DCMA (Defense Contract Management Agency) SSA (Social Security Administration) DISA (Defense Information Systems Agency)	$20,359,169	0.3%	Rank history: #50 in FY2022, #28 in FY2023, #81 in FY2024 and not on the FY2025 list; up 47 since FY2020.
52	EPS Corporation Top agencies USAF (Department of the Air Force) SSA (Social Security Administration) DHS (Department of Homeland Security)	$20,200,837	0.3%	Rank history: #73 in FY2022 and not on the FY2023–FY2025 lists; down 20 since FY2020.
53	Arctic Slope Regional Corporation 2 awardees, including Asrc Federal System Solutions LLC Top agencies USAF (Department of the Air Force)	$17,654,192	0.3%	Rank history: #55 in FY2022, #58 in FY2023, #53 in FY2024 and #39 in FY2025; up 83 since FY2020.
54	York Telecom Corporation Through Kinly US Corporation Top agencies SSA (Social Security Administration) HHS (Department of Health and Human Services)	$17,311,293	0.3%	Rank history: #59 in FY2022, #35 in FY2023 and not on the FY2024–FY2025 lists; new, not ranked in FY2020.
55	Technology Solutions Provider, LLC Top agencies USDA (Department of Agriculture) HHS (Department of Health and Human Services) Commerce (Department of Commerce)	$16,075,194	0.2%	Rank history: #22 in FY2022, not on the FY2023 list, #29 in FY2024 and not on the FY2025 list; up 15 since FY2020.
56	Bristol Bay Native Corporation Through Gc&E Systems Group, LLC Top agencies Army (Department of the Army)	$15,718,232	0.2%	Rank history: #47 in FY2022, #40 in FY2023, #58 in FY2024 and not on the FY2025 list; up 53 since FY2020.
57	Cavalier Telephone L.L.C. 15 awardees, including Windstream Communications, LLC, Windstream New Edge, LLC and Windstream Ohio, LLC Top agencies DISA (Defense Information Systems Agency) VA (Department of Veterans Affairs) DHA (Defense Health Agency)	$15,655,766	0.2%	Rank history: #82 in FY2022, #63 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
58	Amentum Services, Inc. Top agencies Army (Department of the Army) DISA (Defense Information Systems Agency)	$14,622,171	0.2%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
59	Alaska Native Government Services LLC 2 awardees, including Copper River Technologies, LLC and Copper River Infrastructure Services LLC Top agencies DLA (Defense Logistics Agency) Navy (Department of the Navy)	$14,058,897	0.2%	Rank history: #51 in FY2022, #97 in FY2023 and not on the FY2024–FY2025 lists; down 1 since FY2020.
60	Long Wave Inc. Top agencies USAF (Department of the Air Force)	$13,887,266	0.2%	Rank history: #81 in FY2022, #71 in FY2023 and not on the FY2024–FY2025 lists; up 30 since FY2020.
61	Talton Communications Inc. Top agencies DHS (Department of Homeland Security)	$13,439,655	0.2%	Rank history: #49 in FY2022, #34 in FY2023, #37 in FY2024 and not on the FY2025 list; up 46 since FY2020.
62	Trace Systems Holdings Inc. Through Trace Systems, Inc. Top agencies DODEA (Department of Defense Education Activity) Peace Corps	$13,185,203	0.2%	Rank history: #71 in FY2022, #41 in FY2023 and not on the FY2024–FY2025 lists; up 3 since FY2020.
63	BAE Systems PLC Through BAE Systems Technology Solutions & Services Inc. Top agencies Navy (Department of the Navy)	$13,118,241	0.2%	Rank history: #53 in FY2022, #45 in FY2023, #74 in FY2024 and not on the FY2025 list; up 5 since FY2020.
64	Nana Regional Corporation Inc 5 awardees, including Truestone, LLC, Rivertech LLC and Tuva LLC Top agencies Army (Department of the Army) USAF (Department of the Air Force) HHS (Department of Health and Human Services)	$12,236,716	0.2%	Rank history: not on the FY2022–FY2025 lists; up 13 since FY2020.
65	Intelligent Decisions LLC Through Applied Insight, LLC Top agencies USAF (Department of the Air Force)	$12,132,483	0.2%	Rank history: #96 in FY2022 and not on the FY2023–FY2025 lists; up 45 since FY2020.
66	Eutelsat America Corp. Top agencies USAGM (US Agency for Global Media)	$11,525,750	0.2%	Rank history: not on the FY2022 list, #85 in FY2023 and not on the FY2024–FY2025 lists; up 54 since FY2020.
67	Kratos Defense & Security Solutions, Inc. Through Kratos S1, Inc. Top agencies USAF (Department of the Air Force) DISA (Defense Information Systems Agency)	$11,523,509	0.2%	Rank history: #76 in FY2022, #61 in FY2023, #78 in FY2024 and not on the FY2025 list; up 27 since FY2020.
68	A & T Systems, Inc. Top agencies Army (Department of the Army) Commerce (Department of Commerce)	$11,054,076	0.2%	Rank history: #77 in FY2022, #56 in FY2023, #82 in FY2024 and not on the FY2025 list; up 11 since FY2020.
69	Smartronix LLC Top agencies USAF (Department of the Air Force)	$10,229,996	0.2%	Rank history: not on the FY2022–FY2025 lists; down 3 since FY2020.
70	Deutsche Telekom Business Solutions GMBH 8 awardees, including T-Systems International GMBH, Telekom Deutschland GMBH and T-Mobile Austria GMBH Top agencies Army (Department of the Army) DOS (Department of State) USAF (Department of the Air Force)	$9,551,834	0.1%	Rank history: #83 in FY2022 and not on the FY2023–FY2025 lists; up 22 since FY2020.
71	Gstek, Inc. Top agencies Army (Department of the Army) Navy (Department of the Navy)	$9,411,301	0.1%	Rank history: #64 in FY2022 and not on the FY2023–FY2025 lists; up 2 since FY2020.
72	Global Reach Consulting LLC Top agencies USAF (Department of the Air Force)	$9,348,240	0.1%	Rank history: #69 in FY2022, #54 in FY2023, #57 in FY2024 and #46 in FY2025; up 47 since FY2020.
73	Network Innovations Inc. 3 awardees, including Nic4 Inc. Top agencies Army (Department of the Army) DOJ (Department of Justice) DOI (Department of the Interior)	$9,149,026	0.1%	Rank history: #63 in FY2022 and not on the FY2023–FY2025 lists; down 6 since FY2020.
74	The Centech Group Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army)	$8,972,514	0.1%	Rank history: not on the FY2022–FY2025 lists; up 1 since FY2020.
75	Summit Technical Solutions, LLC Top agencies USAF (Department of the Air Force)	$8,633,674	0.1%	Rank history: #78 in FY2022 and not on the FY2023–FY2025 lists; up 13 since FY2020.
76	Encompass Digital Media Inc. Top agencies DMA (Defense Media Activity)	$8,312,943	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
77	Beyon B.s.c Top agencies DISA (Defense Information Systems Agency) USAF (Department of the Air Force) Navy (Department of the Navy)	$8,025,949	0.1%	Rank history: not on the FY2022–FY2023 lists, #84 in FY2024 and #73 in FY2025; new, not ranked in FY2020.
78	Serco North America (Holdings) Inc 2 awardees, including Serco Inc. Top agencies USAF (Department of the Air Force)	$7,706,664	0.1%	Rank history: #62 in FY2022, #73 in FY2023 and not on the FY2024–FY2025 lists; up 49 since FY2020.
79	The Mental Health Association of New York City, Inc. Top agencies VA (Department of Veterans Affairs)	$7,350,822	0.1%	Rank history: #67 in FY2022, #51 in FY2023, not on the FY2024 list and #75 in FY2025; up 29 since FY2020.
80	Telecom Italia SPA 2 awardees, including Telecom Italia SPA O TIM S.P.A. Top agencies Navy (Department of the Navy) Army (Department of the Army) DISA (Defense Information Systems Agency)	$7,050,600	0.1%	Rank history: #86 in FY2022 and not on the FY2023–FY2025 lists; up 43 since FY2020.
81	Corp Ten International Top agencies Army (Department of the Army) DHS (Department of Homeland Security) Navy (Department of the Navy)	$7,031,638	0.1%	Rank history: #80 in FY2022, #67 in FY2023 and not on the FY2024–FY2025 lists; up 117 since FY2020.
82	University Corporation for Advanced Internet Development Top agencies Commerce (Department of Commerce) DOT (Department of Transportation)	$6,841,286	0.1%	Rank history: #75 in FY2022, #60 in FY2023, #72 in FY2024 and #50 in FY2025; up 33 since FY2020.
83	Futron, Inc. Top agencies HHS (Department of Health and Human Services) DOI (Department of the Interior) DLA (Defense Logistics Agency)	$6,476,129	0.1%	Rank history: #79 in FY2022, #88 in FY2023 and not on the FY2024–FY2025 lists; up 64 since FY2020.
84	International Business Machines Corporation 2 awardees Top agencies Army (Department of the Army)	$6,414,024	0.1%	Rank history: not on the FY2022–FY2025 lists; down 63 since FY2020.
85	KVH Industries Inc. Top agencies DHS (Department of Homeland Security) Navy (Department of the Navy)	$6,070,420	0.1%	Rank history: #57 in FY2022, #57 in FY2023 and not on the FY2024–FY2025 lists; up 14 since FY2020.
86	Strategic Approach Solutions LLC Top agencies VA (Department of Veterans Affairs)	$5,805,013	0.1%	Rank history: #90 in FY2022 and not on the FY2023–FY2025 lists; up 38 since FY2020.
87	Dinocrates Group LLC Through Global Management Systems, Inc. Top agencies Army (Department of the Army)	$5,670,196	0.1%	Rank history: not on the FY2022–FY2025 lists; up 79 since FY2020.
88	Globecomm Systems Inc. 2 awardees, including Ultisat, Inc. Top agencies USAGM (US Agency for Global Media) USAF (Department of the Air Force) Commerce (Department of Commerce)	$5,616,168	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.
89	Nippon Telegraph and Telephone Corporation 5 awardees, including NTT Docomo, Inc., Docomo Pacific, Inc. and NTT East, Inc. Top agencies Navy (Department of the Navy) DOS (Department of State) USAF (Department of the Air Force)	$5,520,045	0.1%	Rank history: not on the FY2022 list, #89 in FY2023 and not on the FY2024–FY2025 lists; up 63 since FY2020.
90	Comtech Telecommunications Corp. Through Comtech Mobile Datacom LLC Top agencies Army (Department of the Army)	$5,449,418	0.1%	Rank history: not on the FY2022–FY2025 lists; up 153 since FY2020.
91	Bowhead Communication Services LLC Top agencies USAF (Department of the Air Force)	$5,372,707	0.1%	Rank history: not on the FY2022–FY2024 lists and #86 in FY2025; up 139 since FY2020.
92	Leader Communications Inc. Top agencies Army (Department of the Army)	$5,119,245	0.1%	Rank history: #61 in FY2022, #47 in FY2023, #54 in FY2024 and not on the FY2025 list; up 271 since FY2020.
93	Frontier Communications Corporation 24 awardees, including Navajo Communications Co., Inc., Citizens Telecommunications Company of West Virginia and Frontier California Inc. Top agencies VA (Department of Veterans Affairs) HHS (Department of Health and Human Services) DOJ (Department of Justice)	$4,757,237	0.1%	Rank history: not on the FY2022–FY2025 lists; up 12 since FY2020.
94	Motorola Inc 2 awardees, including Motorola Solutions, Inc. Top agencies USAF (Department of the Air Force) Army (Department of the Army) DOJ (Department of Justice)	$4,606,162	0.1%	Rank history: not on the FY2022–FY2025 lists; up 51 since FY2020.
95	Cox Enterprises, Inc. 23 awardees, including Cox Communications Hampton Roads, L.L.C., Cox Virginia Telcom, L.l.c and Cox California Telcom, LLC Top agencies Navy (Department of the Navy) USAF (Department of the Air Force) DHA (Defense Health Agency)	$4,474,786	0.1%	Rank history: not on the FY2022 list, #95 in FY2023 and not on the FY2024–FY2025 lists; up 44 since FY2020.
96	NA Alii Consulting & Sales LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) DISA (Defense Information Systems Agency)	$4,406,767	0.1%	Rank history: not on the FY2022–FY2025 lists; up 117 since FY2020.
97	Time Warner Cable Enterprises LLC 12 awardees, including Charter Communications Operating, LLC, Charter Communications LLC and Charter Communications Holdings LLC Top agencies VA (Department of Veterans Affairs) Army (Department of the Army) Navy (Department of the Navy)	$4,323,239	0.1%	Rank history: not on the FY2022–FY2025 lists; up 52 since FY2020.
98	Space Systems/Loral LLC Through Vantor Inc. Top agencies Navy (Department of the Navy)	$4,270,000	0.1%	Rank history: #91 in FY2022, #86 in FY2023 and not on the FY2024–FY2025 lists; up 384 since FY2020.
99	Satcom Direct Communications, Inc. 3 awardees, including Satcom Direct Government Communications, Inc. and Satcom Direct Government, LLC Top agencies Navy (Department of the Navy) Army (Department of the Army) USAF (Department of the Air Force)	$4,155,855	0.1%	Rank history: not on the FY2022–FY2025 lists; down 12 since FY2020.
100	Bytecubed LLC Through Intelliware Systems Inc. Top agencies DOJ (Department of Justice)	$4,134,352	0.1%	Rank history: not on the FY2022–FY2025 lists; new, not ranked in FY2020.

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100 of 1,363 contractors listed here. See the rest on GovTribe.

Rankings for the codes under NAICS 517

Code	Net obligations	Largest contractor
5171 Wired and Wireless Telecommunications (except Satellite)	$2,465,997,164	At&T Inc.
5179 Other Telecommunications	$1,215,322,980	HP Enterprise Services LLC
5174 Satellite Telecommunications	$1,125,192,280	Iridium Satellite LLC
5173 Wired and Wireless Telecommunications Carriers	$627,390,385	At&T Inc.
5172 Wireless Telecommunications Carriers (except Satellite)	$41,922,433	Verizon Communications Inc.

How this ranking works

Source: every contract action FPDS records (as published on SAM.gov) in the period, as GovTribe received it.
Amounts are net obligations: what was obligated, less what was deobligated. Shares are of $6.43 billion obligated before deobligations, so they never pass 100%.
Parent companies: each action counts under the ultimate parent its award record names, or under the awardee when it names none, so no dollar counts twice. Parents of the same name (Inc., LLC and the like aside) count as one company, since FPDS records a company's parent under more than one UEI over time. GovTribe corrects a few parents and names by hand; see the corrections.
Fiscal year 2021 ran Oct 1, 2020 – Sep 30, 2021. The Department of Defense reports its contract actions to FPDS about 90 days late, so a fiscal year is ranked once they're in, in February, and the list doesn't change after.
Rank changes compare with FY2020. "New" marks a company outside that period's top 500, and "Returned" one of those that was on an earlier fiscal year's list.
Rank lines show each company's rank on every fiscal year's list since FY2021, #1 at the top, on a scale that gives the top of the list more room. A dashed stretch spans years it wasn't on the list. The step from FY2020 takes the color of the rank change beside it.
Placeholder recipients FPDS uses when it names no company ("Miscellaneous Foreign Contractors" and the like) aren't ranked.

Quick answers

Who were the top 10 NAICS 517 contractors in FY2021?

1. At&T Inc. ($778M), 2. Verizon Communications Inc. ($336M), 3. Lumen Technologies, Inc. ($298M), 4. CACI International Inc. ($246M), 5. HP Enterprise Services LLC ($237M), 6. Iridium Satellite LLC ($207M), 7. General Dynamics Corporation ($169M), 8. RTX Corporation ($159M), 9. Leonardo S.p.A. ($137M), 10. Lockheed Martin Corporation ($117M).

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