Company lists · Data refreshed November 2026

Top 25 Telecom engineering firms worldwide

Name: Telecom engineering firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 20,878 companies tracked

RevenueBase identified 20,878 company matches for telecom engineering firms worldwide as of November 2026 and tracks 696,220 professional contacts across them, including 124,410 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for telecom engineering firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026. Country and city lists for telecom engineering firms follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

20,878Companies

696,220Contacts tracked

124,410Verified emails

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The 25 largest telecom engineering firms worldwide

Ranked by team size

Top 25 of 20,878 company matches for telecom engineering firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	At&t	Exact match	Dallas, CA, United StatesHQ recorded Nov 6, 2026	10001+	162,612 contacts →
	Exact match “We understand that our customers want an easier, less complicated life.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Cyient	Exact match	Hyderabad, IndiaHQ recorded Nov 6, 2026	10001+	20,105 contacts →
	Exact match “Cyient is a global lifecycle engineering services company powering mission-critical industries from design to aftermarket across products, plants, and networks.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Serede	Exact match	Rio De Janeiro, BrazilHQ recorded Nov 6, 2026	10001+	8,708 contacts →
	Exact match “A Serede é uma empresa prestadora de serviços de implantação e manutenção em redes de Telecom, fundada em 06 de agosto de 2007.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	AYESA	Exact match	Seville, SpainHQ recorded Nov 6, 2026	10001+	6,529 contacts →
	Exact match “Ayesa is a global provider of technology and engineering services with more than 11500 employees in twenty-three countries across Europe, Latin America, Africa and Asia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Icomon Tecnologia Ltda	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	10001+	5,504 contacts →
	Exact match “A Icomon atua há 37 anos com alta performance em tecnologia e telecomunicações.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Amaris Consulting Part Of Mantu	Exact match	Chêne-bourg, SwitzerlandHQ recorded Nov 6, 2026	5,001-10,000	5,223 contacts →
	Exact match “Amaris Consulting is an independent technology consulting firm providing guidance and solutions to businesses.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Groupe SII	Exact match	Paris, FranceHQ recorded Nov 6, 2026	10001+	5,212 contacts →
	Exact match “Le groupe SII est une société d’ingénierie et de conseil en technologies (ICT) et une entreprise de services numériques (ESN) créée en 1979 par Bernard HUVÉ, ingénieur de…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Viavi Solutions	Exact match	Chandler, AZ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	4,595 contacts →
	Exact match “VIAVI Solutions (NASDAQ: VIAV) is a global leader in both network and service enablement and optical security performance products and solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Aricent	Exact match	Santa Clara, United StatesHQ recorded Nov 6, 2026	10001+	4,380 contacts →
	Exact match “Aricent is now Altran, delivering industry innovations at future speed.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Circet	Exact match	Paris, FranceHQ recorded Nov 6, 2026	10001+	4,138 contacts →
	Exact match “A global player in the telecom infrastructure services industry, the Circet Group provides operators, local authorities and key accounts throughout the world with an integrated…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Proing	Exact match	Yumbo, ColombiaHQ recorded Nov 6, 2026	1,001-5,000	3,760 contacts →
	Exact match “Basados en nuestros talentos y buena actitud, desarrollamos la ingeniería para brindar un mejor presente y futuro.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Mastec Communications Group	Exact match	Coral Gables, FL, United StatesHQ recorded Nov 6, 2026	5,001-10,000	3,416 contacts →
	Exact match “MasTec Communications Group (MCG) is a division of MasTec that provides comprehensive services and turnkey solutions for Telecom operators.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	Hfcl Limited	Exact match	New Delhi, IndiaHQ recorded Nov 6, 2026	1,001-5,000	3,333 contacts →
	Exact match “HFCL is a leading technology company specialising in creating digital networks for telcos, enterprises and governments.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Tejas Networks	Exact match	Bangalore, IndiaHQ recorded Nov 6, 2026	1,001-5,000	3,308 contacts →
	Exact match “Tejas Networks is a global broadband, optical and wireless networking company, with a focus on technology, innovation and R&D.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Alten Italia	Exact match	Milan, ItalyHQ recorded Nov 6, 2026	1,001-5,000	3,042 contacts →
	Exact match “Il Gruppo ALTEN, leader europeo nella consulenza per le tecnologie avanzate in campo ingegneristico e ICT, è quotato alla Borsa di Parigi e vanta più di 57.700 collaboratori in…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	GTL Limited	Exact match	Navi Mumbai, IndiaHQ recorded Nov 6, 2026	1,001-5,000	2,896 contacts →
	Exact match “GTL, a Global Group Enterprise, is a leading Network Services company, offering services and solutions to address the Network Life Cycle requirements of Telecom Operators…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	Procisa DO Brasil	Exact match	São Paulo, BrazilHQ recorded Nov 6, 2026	1,001-5,000	2,852 contacts →
	Exact match “Prazer, somos a Procisa do Brasil!” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Sielte SPA	Exact match	Rome, ItalyHQ recorded Nov 6, 2026	1,001-5,000	2,586 contacts →
	Exact match “Oltre Persone, distribuite su 21 Centri Operativi in tutta Italia, che ogni giorno installano, collaudano, gestiscono il commissioning e le manutenzioni, progettano, implementano…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	Sirti S.P.A	Exact match	Sesto San Giovanni (mi), ItalyHQ recorded Nov 6, 2026	1,001-5,000	2,442 contacts →
	Exact match “Sirti is Italy's leading technology company in the design and production of network infrastructures and telecoms system integration.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Sogetrel	Exact match	Issy Les Moulineaux, FranceHQ recorded Nov 6, 2026	1,001-5,000	2,356 contacts →
	Exact match “En première ligne de la transformation numérique des entreprises et des territoires, le Groupe Sogetrel est spécialisé dans les services aux infrastructures numériques et…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	LCC	Exact match	Mclean, United StatesHQ recorded Nov 6, 2026	5,001-10,000	2,335 contacts →
	Exact match “In Feb.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	IES Communications	Exact match	Tempe, AZ, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,994 contacts →
	Exact match “IES Communications, a division of IES Holdings, Inc.(NASDAQ: IESC), is a national technology infrastructure integrator.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23	Infinera	Exact match	San Jose, CA, United StatesHQ recorded Nov 6, 2026	1,001-5,000	1,906 contacts →
	Exact match “Infinera is now part of Nokia.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24	Camusat	Exact match	Paris, FranceHQ recorded Nov 6, 2026	1,001-5,000	1,852 contacts →
	Exact match “Camusat is one of the market leaders in the implementation of telecom infrastructures and one of the most experienced network developers.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25	PT Berca Hardayaperkasa	Exact match	Jakarta Pusat, IndonesiaHQ recorded Nov 6, 2026	1,001-5,000	1,772 contacts →
	Exact match “Since its establishment in 1990, PT.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “telecom engineering firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 20,878 telecom engineering firms worldwide

See the full list, filter by size, metro and specialty, and access 124,410 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Telecom engineering firms worldwide at a glance

As of Nov 6, 2026

17.9%Verified-email coverage

33.3Average contacts per company

11-50Median size (employees)

1.3%Largest-city concentration · Sao Paulo

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

8,416

11-50

7,673

51-200

3,045

201-500

904

501-1,000

324

1,001-5,000

244

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for telecom engineering firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “telecom engineering firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every displayed company carries at least one verified work email. RevenueBase tracks 124,410 professional contacts with verified work emails across the full matched dataset. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Telecom engineering firms by location

117 lists · largest first

Every Telecom engineering firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “telecom engineering firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many telecom engineering firms are there worldwide?

RevenueBase identified 20,878 company matches for telecom engineering firms worldwide as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

At&t tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most telecom engineering firms?

The United States leads with 3,125 companies, followed by Brazil (1,262) and the United Kingdom (946). Every telecom engineering firms list by country and city is linked on this page.

Which city has the most telecom engineering firms?

Sao Paulo leads with 272 company records, followed by London (153) and Tehran (144).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 124,410 professional contacts with verified work emails tracked across these 20,878 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 2026.

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About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase SmartSearch, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.