Company lists · Data refreshed September 2026

Top 25 Fiber optic telecommunications companies based in Spain

Name: Fiber optic telecommunications companies based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 30, 2026 265 companies tracked

RevenueBase identified 265 company matches for fiber optic telecommunications companies associated with Spain as of September 2026 and tracks 8,354 professional contacts across them, including 658 with verified work emails. Madrid is the largest hub.

This list covers company matches for fiber optic telecommunications companies associated with Spain, 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 September 30, 2026.

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 Sep 30, 2026 How this list was built

265Companies

8,354Contacts tracked

658Verified emails

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The 25 largest fiber optic telecommunications companies based in Spain

Ranked by team size

Top 25 of 265 company matches for fiber optic telecommunications companies based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 30, 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	Digi Spain Telecom	Exact match	Alcobendas, SpainHQ recorded Sep 30, 2026	10001+	2,658 contacts →
	Exact match “DIGI es una empresa que pertenece a la multinacional DIGI Communications, con 30 años de experiencia en el sector de las telecomunicaciones y presente en España desde 2008 donde…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
2	Ufinet	Exact match	Madrid, SpainHQ recorded Sep 30, 2026	1,001-5,000	1,182 contacts →
	Exact match “UFINET is a Latin American carrier of carriers providing high-quality solutions in the wholesale telecom market.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
3	Avatel Telecom	Exact match	Madrid, SpainHQ recorded Sep 30, 2026	1,001-5,000	698 contacts →
	Exact match “Somos Avatel Telecom, compañía de telecomunicaciones en España.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
4	ONO	Exact match	Pozuelo De Alarcón, SpainHQ recorded Sep 30, 2026	1,001-5,000	396 contacts →
	Exact match “ONO es la compañía de comunicación y entretenimiento por fibra óptica líder en España.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
5	Adamo Telecom Iberia S.A.U	Exact match	Barcelona, SpainHQ recorded Sep 30, 2026	51-200	298 contacts →
	Exact match “Adamo is a telecom operator with Swedish origin operating in Spain since 2007.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
6	Telxius	Exact match	Madrid, SpainHQ recorded Sep 30, 2026	201-500	294 contacts →
	Exact match “As the world’s needs for uninterrupted global interconnectivity continue to rise, we are preparing the road ahead.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
7	Lyntia	Exact match	Alcobendas, SpainHQ recorded Sep 30, 2026	201-500	157 contacts →
	Exact match “lyntia is the leading wholesale optic fibre operator in Spain and Portugal, providing robust, flexible and sustainable connectivity solutions for the Telco and Cloud sector.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
8	Cableworld	Exact match	Alicante, SpainHQ recorded Sep 30, 2026	201-500	132 contacts →
	Exact match “Cableworld es la compañía de servicios de telecomunicaciones por fibra óptica líder en en sus zonas de influencia, en la que ofrecemos de manera integrada servicios de Internet…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
9	Cablescom	Exact match	Zaragoza, SpainHQ recorded Sep 30, 2026	201-500	92 contacts →
	Exact match “Cablescom es una de las principales compañías europeas dedicadas al diseño, fabricación y comercialización de cables de telecomunicaciones, señalización y fibra óptica.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
10	Fibritel	Exact match	Illescas, SpainHQ recorded Sep 30, 2026	51-200	60 contacts →
	Exact match “Somos la Fibra Óptica que te conecta desde la España rural” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
11	Netllar Telecom	Exact match	Albal, SpainHQ recorded Sep 30, 2026	201-500	52 contacts →
	Exact match “Somos una compañía con una dilatada experiencia ubicada en el sector de las nuevas tecnologías, como operador nacional de telecomunicaciones nuestra actividad se centra en…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
12	WIBER	Exact match	Motril, SpainHQ recorded Sep 30, 2026	51-200	51 contacts →
	Exact match “Tarifa plana de calidad y buen servicio.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
13	EMBOU	Exact match	Zaragoza, SpainHQ recorded Sep 30, 2026	11-50	50 contacts →
	Exact match “Somos la operadora aragonesa líder en red de acceso a banda ancha en Aragón y zonas limítrofes mediante la integración de las tecnologías más avanzadas en telecomunicaciones.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
14	Lightmax SL	Exact match	Irun, SpainHQ recorded Sep 30, 2026	51-200	49 contacts →
	Exact match “Lightmax SL empresa fundada en 2007 especializada en la fabricación y suministro de productos para redes pasivas de fibra óptica.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
15	Silbö Telecom	Exact match	Madrid, SpainHQ recorded Sep 30, 2026	11-50	41 contacts →
	Exact match “Silbö es la nueva telco que solo te contará cosas que suenan bien.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
16	Optral S.A	Exact match	Alcobendas, SpainHQ recorded Sep 30, 2026	51-200	40 contacts →
	Exact match “OPTRAL is a Spanish leader company, founded in 1988, engaged in fibre optic cable design, manufacture and worldwide known companies in the Telecom, Oil & Gas, Industry and…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
17	Fibranet Telecomunicaciones	Exact match	Murcia, SpainHQ recorded Sep 30, 2026	51-200	35 contacts →
	Exact match “FIBRANET \| Operador Nacional de Telecomunicaciones FIBRANET es un operador de telecomunicaciones con más de 30 años de experiencia en el sector perteneciente a Olin Group.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
18	Onivia	Exact match	Pozuelo De Alarcón, SpainHQ recorded Sep 30, 2026	11-50	30 contacts →
	Exact match “Onivia es el operador mayorista de fibra óptica independiente y neutral, que está transformando el mercado de las telecomunicaciones en España.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
19	7play	Exact match	Las Rozas De Madrid, SpainHQ recorded Sep 30, 2026	51-200	28 contacts →
	Exact match “7Play es un operador de telecomunicaciones con alcance nacional, que nace de la mano de un experimentado equipo con una larga trayectoria en el sector telco y en la consolidación…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
20	Bluevía	Exact match	Madrid, SpainHQ recorded Sep 30, 2026	51-200	26 contacts →
	Exact match “Somos un operador de red que ofrece servicios mayoristas de acceso FTTH y otros servicios de conectividad sobre tecnología de fibra.” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
21	Connectivity	Exact match	Barcelona, SpainHQ recorded Sep 30, 2026	11-50	21 contacts →
	Exact match “En Connectivity ofrecemos servicios de conectividad personalizados para empresas que quieren ofrecer servicios de telefonía e internet con su propia marca y para empresas que…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
22	Fibercom SL	Exact match	Zaragoza, SpainHQ recorded Sep 30, 2026	11-50	17 contacts →
	Exact match “Fibercom ofrece productos y servicios de Fibra óptica en el ámbito de las Telecomunicaciones, cubriendo la totalidad de actividades involucradas en el proceso: ingeniería de redes…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
23	PC Mancha	Exact match	Quintanar De La Orden, SpainHQ recorded Sep 30, 2026	11-50	17 contacts →
	Exact match “PC Mancha es un operador local de telecomunicaciones y servicios tecnológicos que ofrece soluciones de conectividad, comunicaciones, seguridad y soporte informático para empresas…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
24	Redi Ibérica DE Redes	Exact match	Valencia, SpainHQ recorded Sep 30, 2026	11-50	17 contacts →
	Exact match “Comercializando bajo el nombre de REDI, IBÉRICA DE REDES es un operador TOTAL de comunicaciones de voz y datos, integramos y proporcionamos todas las modalidades de conectividad…” Recorded in the RevenueBase company graph · Sep 30, 2026 · View company records in RevenueBase
25	Onsicom Operador DE Telecomunicaciones	Exact match	La Rinconada, SpainHQ recorded Sep 30, 2026	51-200	16 contacts →
	Exact match “Onsicom es una compañía de telecomunicaciones líder en Andalucía que ofrece servicios de internet de alta velocidad, telefonía fija y móvil y televisión a clientes residenciales y…” Recorded in the RevenueBase company graph · Sep 30, 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 “fiber optic telecommunications companies”. 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 265 fiber optic telecommunications companies based in Spain

See the full list, filter by size, metro and specialty, and access 658 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Fiber optic telecommunications companies based in Spain at a glance

As of Sep 30, 2026

7.9%Verified-email coverage

31.5Average contacts per company

11-50Median size (employees)

10.9%Largest-city concentration · Madrid

Sep 30, 2026Page data refreshed

Companies by employee count

1-10

109

11-50

101

51-200

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for Spain, so it is reported there. Company counts and contact totals on this page are exact for Spain, over 265 companies.

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.
What qualifies: Company records associated with Spain whose business descriptions match “fiber optic telecommunications companies” 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 658 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 September 30, 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.

Fiber optic telecommunications companies by metro

Fiber optic telecommunications companies in Madrid29

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 “fiber optic telecommunications companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many fiber optic telecommunications companies are there based in Spain?

RevenueBase identified 265 company matches for fiber optic telecommunications companies associated with Spain as of September 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?

Digi Spain Telecom tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most fiber optic telecommunications companies?

Madrid leads with 29 company records, followed by Murcia (13) and Barcelona (11).

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 658 professional contacts with verified work emails tracked across these 265 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 September 30, 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.