Company lists · Data refreshed September 2026

Top 25 Fiber optic network builders worldwide

Name: Fiber optic network builders worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 20, 2026 10,947 companies tracked

RevenueBase identified 10,947 fiber optic network builders worldwide as of September 2026 and tracks 292,148 professional contacts across them, including 74,198 with verified work emails. The United States is the largest market and Shenzhen the largest hub.

This list covers fiber optic network builders worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 20, 2026. Country and city lists for fiber optic network builders follow the table.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 20, 2026 86% judged on-target in blind review

10,947Companies

292,148Contacts tracked

74,198Verified emails

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest fiber optic network builders worldwide

Ranked by team size

Top 25 of 10,947 fiber optic network builders worldwide, ranked by team size, largest first. Data refreshed Sep 20, 2026. RevenueBase Smart Search rates how each company's information relates to fiber optic network builders: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Openreach	Indirect evidence	London, United KingdomHQ checked Sep 20, 2026	10001+	13,395 contacts →
	Indirect evidence “We’re the people who make the net work.” Source: RevenueBase Database · checked Sep 20, 2026
2	Frontier Internet	Partial evidence	Dallas, TX, United StatesHQ checked Sep 20, 2026	10001+	11,368 contacts →
	Partial evidence “Frontier, a Verizon company, is one of the largest fiber providers in the U.S.” Source: RevenueBase Database · checked Sep 20, 2026
3	CIENA	Indirect evidence	Hanover, MD, United StatesHQ checked Sep 20, 2026	5,001-10,000	9,426 contacts →
	Indirect evidence “Ciena (NYSE:CIEN) is the global leader in high-speed connectivity.” Source: RevenueBase Database · checked Sep 20, 2026
4	Serede	Indirect evidence	Rio De Janeiro, BrazilHQ checked Sep 20, 2026	10001+	8,011 contacts →
	Indirect evidence “A Serede é uma empresa prestadora de serviços de implantação e manutenção em redes de Telecom, fundada em 06 de agosto de 2007.” Source: RevenueBase Database · checked Sep 20, 2026
5	STL	Partial evidence	Pune, IndiaHQ checked Sep 20, 2026	1,001-5,000	5,391 contacts →
	Partial evidence “STL is a global leader in advanced connectivity solutions, providing end-to-end solutions for building AI-ready infrastructure, FTTx, Rural, Enterprise and Data Centre networks.” Source: RevenueBase Database · checked Sep 20, 2026
6	Viavi Solutions	Partial evidence	Chandler, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	4,248 contacts →
	Partial evidence “VIAVI Solutions (NASDAQ: VIAV) is a global leader in both network and service enablement and optical security performance products and solutions.” Source: RevenueBase Database · checked Sep 20, 2026
7	ACT Fibernet	Indirect evidence	Bangalore, IndiaHQ checked Sep 20, 2026	5,001-10,000	3,876 contacts →
	Indirect evidence “ACT (Atria Convergence Technologies Ltd.) was born out of a vision to become the most admired in-home entertainment, education, and interactive services provider in India, back in…” Source: RevenueBase Database · checked Sep 20, 2026
8	Mastec Communications Group	Indirect evidence	Coral Gables, FL, United StatesHQ checked Sep 20, 2026	5,001-10,000	3,207 contacts →
	Indirect evidence “MasTec Communications Group (MCG) is a division of MasTec that provides comprehensive services and turnkey solutions for Telecom operators.” Source: RevenueBase Database · checked Sep 20, 2026
9	Zayo Group	Indirect evidence	Denver, CO, United StatesHQ checked Sep 20, 2026	5,001-10,000	2,948 contacts →
	Indirect evidence “For more than 18 years, Zayo Group of companies has helped the world’s most ambitious organizations build the infrastructure behind what’s next.” Source: RevenueBase Database · checked Sep 20, 2026
10	AFL	Indirect evidence	Duncan, SC, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,813 contacts →
	Indirect evidence “Founded in 1984, AFL is a global manufacturer providing end-to-end solutions to the energy, broadband, data center, AI and industrial markets.” Source: RevenueBase Database · checked Sep 20, 2026
11	Converge ICT Solutions INC	Indirect evidence	Pasig, PhilippinesHQ checked Sep 20, 2026	1,001-5,000	2,431 contacts →
	Indirect evidence “Converge ICT Solutions, Inc.(PSE: CNVRG) is the fastest-growing broadband service and technology provider in the Philippines.” Source: RevenueBase Database · checked Sep 20, 2026
12	Desktop	Indirect evidence	Sumaré, BrazilHQ checked Sep 20, 2026	1,001-5,000	2,354 contacts →
	Indirect evidence “A Desktop é uma empresa de telecomunicação comprometida em conectar você ao futuro com velocidade, estabilidade e inovação!” Source: RevenueBase Database · checked Sep 20, 2026
13	Sogetrel	Indirect evidence	Issy Les Moulineaux, FranceHQ checked Sep 20, 2026	1,001-5,000	2,285 contacts →
	Indirect evidence “En première ligne de la transformation numérique des entreprises et des territoires, le Groupe Sogetrel est spécialisé dans les services aux infrastructures numériques et…” Source: RevenueBase Database · checked Sep 20, 2026
14	Brightspeed	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 20, 2026	1,001-5,000	2,069 contacts →
	Partial evidence “We’re Brightspeed, a fiber internet provider on a mission to bring more connectivity to America.” Source: RevenueBase Database · checked Sep 20, 2026
15	Infinera	Indirect evidence	San Jose, CA, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,959 contacts →
	Indirect evidence “Infinera is now part of Nokia.” Source: RevenueBase Database · checked Sep 20, 2026
16	Metronet	Strong evidence	Evansville, IN, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,938 contacts →
	Strong evidence “Metronet, the nation's fastest-growing fiber-to-the-home builder, is now owned by a joint venture of T-Mobile, America's 5G leader, and KKR, the global investment firm.” Source: RevenueBase Database · checked Sep 20, 2026
17	Open Fiber	Partial evidence	Rome, ItalyHQ checked Sep 20, 2026	1,001-5,000	1,818 contacts →
	Partial evidence “Open Fiber nasce a dicembre 2016 con l’obiettivo di realizzare un’infrastruttura di rete a banda ultra larga (BUL) in fibra ottica FTTH (Fiber To The Home) in tutte le regioni…” Source: RevenueBase Database · checked Sep 20, 2026
18	IES Communications	Indirect evidence	Tempe, AZ, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,800 contacts →
	Indirect evidence “IES Communications a division of IES (NASDAQ: IESC) provides each client with a team of highly qualified dedicated professionals that deliver superior quality and cost effective…” Source: RevenueBase Database · checked Sep 20, 2026
19	Congruex	Indirect evidence	Boulder, CO, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,676 contacts →
	Indirect evidence “Congruex was formed in 2017 to take advantage of historic demand for digital connectivity.” Source: RevenueBase Database · checked Sep 20, 2026
20	Telecon	Strong evidence	Montreal, QC, CanadaHQ checked Sep 20, 2026	1,001-5,000	1,573 contacts →
	Strong evidence “From a regional telecom networks builder in 1967 in Quebec (Canada), Telecon has grown into a world-class industry-leading telecom networks design, infrastructure and connectivity…” Source: RevenueBase Database · checked Sep 20, 2026
21	Pt. Mora Telematika Indonesia TBK	Indirect evidence	Jakarta Pusat, IndonesiaHQ checked Sep 20, 2026	1,001-5,000	1,510 contacts →
	Indirect evidence “Moratelindo is part of PT Ekamas Mora RepublikTbk (MoraRepublic), one of Indonesia’s largest integrated infrastructure Telecommunication and connectivity providers.” Source: RevenueBase Database · checked Sep 20, 2026
22	Cityfibre	Partial evidence	London, United KingdomHQ checked Sep 20, 2026	1,001-5,000	1,460 contacts →
	Partial evidence “At CityFibre, we’re building a new, intelligent, open-access fibre network, purpose built for the data age.” Source: RevenueBase Database · checked Sep 20, 2026
23	Excitel Broadband	Indirect evidence	New Delhi, IndiaHQ checked Sep 20, 2026	1,001-5,000	1,449 contacts →
	Indirect evidence “We started our journey in 2015 with a single mission - Bringing world class broadband experience to each Indian household.” Source: RevenueBase Database · checked Sep 20, 2026
24	Hotwire Communications LTD	Strong evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 20, 2026	1,001-5,000	1,420 contacts →
	Strong evidence “Hotwire Communications is a national leader in fiber optic technology, delivering advanced, customized telecommunications solutions to residential, commercial, senior-living…” Source: RevenueBase Database · checked Sep 20, 2026
25	Aerial Telecom Solutions	Indirect evidence	Mohali, IndiaHQ checked Sep 20, 2026	5,001-10,000	1,388 contacts →
	Indirect evidence “Aerial Telecom Solutions Private Limited is a global systems integrator and technology partner, driving next-generation connectivity and digital transformation across diverse…” Source: RevenueBase Database · checked Sep 20, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: fiber optic network builders. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names fiber optic network builders.
Partial evidence: Its own public description names part of fiber optic network builders, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name fiber optic network builders. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 10,947 fiber optic network builders worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 74,198 reachable decision-makers.

Free signup · no credit card

View the full list →

Fiber optic network builders worldwide at a glance

As of Sep 20, 2026

25.4%Verified-email coverage

26.7Average contacts per company

11-50Median size (employees)

1.1%Largest-city concentration · Shenzhen

Sep 20, 2026Page data refreshed

Companies by employee count

1-10

4,095

11-50

4,031

51-200

1,882

201-500

528

501-1,000

186

1,001-5,000

133

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among fiber optic network builders, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
Coverage: Every country. Country and city lists for fiber optic network builders are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “fiber optic network builders”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names fiber optic network builders), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among fiber optic network builders, and records with no verified work email.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
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 listed company carries at least one verified work email, 74,198 across the full list. 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 September 20, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Fiber optic network builders by location

42 lists · largest first

Every Fiber optic network builders 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 Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names fiber optic network builders, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many fiber optic network builders are there worldwide?

RevenueBase identified 10,947 fiber optic network builders worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Openreach, headquartered in London, tops this list with the largest team on record.

Which country has the most fiber optic network builders?

The United States leads with 2,449 companies, followed by Brazil (1,032) and the United Kingdom (685). Every fiber optic network builders list by country and city is linked on this page.

Which city has the most fiber optic network builders?

Shenzhen leads with 119 headquartered companies, followed by Sao Paulo (101) and London (78).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 74,198 verified decision-maker contacts tracked across these 10,947 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 20, 2026.

Ready to reach these companies? Verified emails and direct dials for all 10,947 fiber optic network builders worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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 Smart Search, 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.