Company lists · Data refreshed September 2026

Top 25 Telecom infrastructure operators based in Spain

Name: Telecom infrastructure operators based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 19, 2026 404 companies tracked

RevenueBase identified 404 telecom infrastructure operators headquartered in Spain as of September 2026 and tracks 11,133 professional contacts across them, including 751 with verified work emails. Madrid is the largest hub.

This list covers telecom infrastructure operators headquartered in Spain, 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 19, 2026.

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 19, 2026 86% judged on-target in blind review

404Companies

11,133Contacts tracked

751Verified emails

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The 25 largest telecom infrastructure operators based in Spain

Ranked by team size

Top 25 of 404 telecom infrastructure operators based in Spain, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to telecom infrastructure operators: 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	Cellnex Telecom	Strong evidence	Barcelona, SpainHQ checked Sep 19, 2026	1,001-5,000	1,498 contacts →
	Strong evidence “Cellnex is Europe’s largest telecommunications towers and infrastructures operator, enabling operators to access a wide network of telecommunications infrastructures on a…” Source: RevenueBase Database · checked Sep 19, 2026
2	OFG	Partial evidence	Córdoba, SpainHQ checked Sep 19, 2026	1,001-5,000	701 contacts →
	Partial evidence “OFG is an international company with more than 20 years of experience in the telecommunications sector.” Source: RevenueBase Database · checked Sep 19, 2026
3	Comfica Soluciones Integrales S.L	Partial evidence	Fuenlabrada, SpainHQ checked Sep 19, 2026	201-500	684 contacts →
	Partial evidence “Empresa especializada en la ingenieria, desarrollo, construccion, instalación, y puesta en marcha de instalaciones de telecomunicaciones, electricidad, señalización, redes de…” Source: RevenueBase Database · checked Sep 19, 2026
4	Circet España	Partial evidence	Sevilla, SpainHQ checked Sep 19, 2026	1,001-5,000	455 contacts →
	Partial evidence “Circet España, empresa líder del sector de las telecomunicaciones en España, con implantación a nivel Nacional.” Source: RevenueBase Database · checked Sep 19, 2026
5	ONO	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 19, 2026	1,001-5,000	396 contacts →
	Indirect evidence “ONO es la compañía de comunicación y entretenimiento por fibra óptica líder en España.” Source: RevenueBase Database · checked Sep 19, 2026
6	Axians Spain	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	501-1,000	370 contacts →
	Indirect evidence “En Axians, la marca especializada en TIC de VINCI Energies, impulsamos a nuestros clientes -empresas del sector privado, entidades del sector público, operadores y proveedores de…” Source: RevenueBase Database · checked Sep 19, 2026
7	Adamo Telecom Iberia S.A.U	Strong evidence	Barcelona, SpainHQ checked Sep 19, 2026	51-200	298 contacts →
	Strong evidence “Adamo is a telecom operator with Swedish origin operating in Spain since 2007.” Source: RevenueBase Database · checked Sep 19, 2026
8	Aire Networks	Indirect evidence	Elche, SpainHQ checked Sep 19, 2026	201-500	177 contacts →
	Indirect evidence “Aire Networks, encompasses all the communication services that a company needs to boost its business, with all the advantages and benefits of working with a single service…” Source: RevenueBase Database · checked Sep 19, 2026
9	Lyntia	Partial evidence	Alcobendas, SpainHQ checked Sep 19, 2026	201-500	157 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
10	Powernet	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	150 contacts →
	Partial evidence “Somos una marca global de Ingeniería en integración de soluciones de Telecomunicaciones y Sistemas IT con más de 35 años de experiencia.” Source: RevenueBase Database · checked Sep 19, 2026
11	AXIÓN	Partial evidence	Valencina De La Concepción, SpainHQ checked Sep 19, 2026	51-200	142 contacts →
	Partial evidence “Somos referentes en en la gestión de infraestructuras de telecomunicaciones en España.” Source: RevenueBase Database · checked Sep 19, 2026
12	Inet Smart ITC	Indirect evidence	Cornellà De Llobregat, SpainHQ checked Sep 19, 2026	201-500	139 contacts →
	Indirect evidence “Inet es una empresa del grupo AXIS CORPORATE especializada en procesos de despliegue y mantenimiento de infraestructuras tecnológicas y comunicaciones para empresas.” Source: RevenueBase Database · checked Sep 19, 2026
13	Cableworld	Partial evidence	Alicante, SpainHQ checked Sep 19, 2026	201-500	132 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
14	Ambar Telecomunicaciones	Partial evidence	Santander, SpainHQ checked Sep 19, 2026	201-500	126 contacts →
	Partial evidence “Ámbar Telecomunicaciones es una empresa de ingeniería especializada en la integración global de sistemas de comunicación, que centra su actividad en el diseño, instalación y…” Source: RevenueBase Database · checked Sep 19, 2026
15	Instelca	Partial evidence	Málaga, SpainHQ checked Sep 19, 2026	201-500	118 contacts →
	Partial evidence “El Grupo INSTELCA es proveedor global de servicios de Telecomunicaciones, Redes e Informática con más de 30 años de experiencia y con una clara orientación al clientes que nos ha…” Source: RevenueBase Database · checked Sep 19, 2026
16	Smartel España	Partial evidence	Erandio, SpainHQ checked Sep 19, 2026	51-200	110 contacts →
	Partial evidence “Smart Telecom Consulting, empresa de ingeniería especializada en el campo de la telefonia móvil ofreciendo soluciones integrales a nuestros clientes desde el año 2004.” Source: RevenueBase Database · checked Sep 19, 2026
17	Cableven	Partial evidence	Málaga, SpainHQ checked Sep 19, 2026	501-1,000	103 contacts →
	Partial evidence “Empresa cualificada y especializada en la instalación y mantenimiento de redes y equipos de telecomunicaciones.” Source: RevenueBase Database · checked Sep 19, 2026
18	Cablescom	Partial evidence	Zaragoza, SpainHQ checked Sep 19, 2026	201-500	92 contacts →
	Partial evidence “Cablescom es una de las principales compañías europeas dedicadas al diseño, fabricación y comercialización de cables de telecomunicaciones, señalización y fibra óptica.” Source: RevenueBase Database · checked Sep 19, 2026
19	TOWER	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	88 contacts →
	Partial evidence “Apostando por la innovación y soñando con el desarrollo de una consolidada red de Telecomunicaciones en España, nace Tower Consultores en 1996.” Source: RevenueBase Database · checked Sep 19, 2026
20	Siter Ingeniería DE Infraestructuras	Indirect evidence	Bilbao, SpainHQ checked Sep 19, 2026	51-200	86 contacts →
	Indirect evidence “SITER INGENIERÍA DE INFRAESTRUCTURAS es una compañía con más de 25 años de historia, que opera dando soporte a operadores y empresas relacionadas con el desarrollo de…” Source: RevenueBase Database · checked Sep 19, 2026
21	Afr-Ix Telecom	Strong evidence	Sant Adrià De Besòs, SpainHQ checked Sep 19, 2026	51-200	85 contacts →
	Strong evidence “AFR-IX telecom is a global telecommunications infrastructure group with licensed operations and infrastructure presence across Europe, Africa, Middle East and the Americas…” Source: RevenueBase Database · checked Sep 19, 2026
22	Datatronics	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	63 contacts →
	Partial evidence “Datatronics is a seasoned Telco System Integrator with over thirty years of experience supporting communication service providers, from small operators and MVNOs to large…” Source: RevenueBase Database · checked Sep 19, 2026
23	Radiotrans	Indirect evidence	Leganes, SpainHQ checked Sep 19, 2026	51-200	57 contacts →
	Indirect evidence “RADIOTRANS es una compañía privada transnacional dedicada a la ingeniería, comercialización, suministro, instalación y puesta en marcha y servicio postventa de equipos y sistemas…” Source: RevenueBase Database · checked Sep 19, 2026
24	EMBOU	Partial evidence	Zaragoza, SpainHQ checked Sep 19, 2026	11-50	50 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
25	Correos Telecom, S.A	Strong evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	46 contacts →
	Strong evidence “For the past 24 years, we have been offering telecommunication services over backbone network infrastructures, circuits, VPN.” Source: RevenueBase Database · checked Sep 19, 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: telecom infrastructure operators. 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 telecom infrastructure operators.
Partial evidence: Its own public description names part of telecom infrastructure operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom infrastructure operators. 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 404 telecom infrastructure operators based in Spain

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Telecom infrastructure operators based in Spain at a glance

As of Sep 19, 2026

6.7%Verified-email coverage

27.6Average contacts per company

11-50Median size (employees)

16.3%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

146

11-50

173

51-200

201-500

501-1,000

1,001-5,000

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 404 companies.

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 telecom infrastructure operators, 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.
What qualifies: Companies headquartered in Spain whose own description of what they do matches “telecom infrastructure operators”. 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 telecom infrastructure operators), 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 telecom infrastructure operators, and records with no verified work email. Companies headquartered outside Spain are excluded even when they keep an office there.
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, 751 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 19, 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.

Telecom infrastructure operators by metro

Telecom infrastructure operators in Madrid66

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 telecom infrastructure operators, 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 telecom infrastructure operators are there based in Spain?

RevenueBase identified 404 telecom infrastructure operators headquartered in Spain 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?

Cellnex Telecom, headquartered in Barcelona, tops this list with the largest team on record.

Which city has the most telecom infrastructure operators?

Madrid leads with 66 headquartered companies, followed by Barcelona (20) and Murcia (14).

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 751 verified decision-maker contacts tracked across these 404 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 19, 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 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.