Company lists · Data refreshed September 2026

Top 25 Telecommunications companies based in Spain

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

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 768 companies tracked

RevenueBase identified 768 company matches for telecommunications companies associated with Spain as of September 2026 and tracks 71,024 professional contacts across them, including 6,990 with verified work emails and 486 with mobile numbers. Madrid is the largest hub.

This list covers company matches for 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 6, 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 6, 2026 How this list was built

768Companies

71,024Contacts tracked

6,990Verified emails

486Mobile numbers

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The 25 largest telecommunications companies based in Spain

Ranked by team size

Top 25 of 768 company matches for telecommunications companies based in Spain, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 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	Telefónica	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	10001+	54,718 contacts →
	Exact match “Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
2	Digi Spain Telecom	Exact match	Alcobendas, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
3	Cellnex Telecom	Exact match	Barcelona, SpainHQ recorded Sep 6, 2026	1,001-5,000	1,498 contacts →
	Exact match “Cellnex is Europe’s largest telecommunications towers and infrastructures operator, enabling operators to access a wide network of telecommunications infrastructures on a…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
4	OFG	Exact match	Córdoba, SpainHQ recorded Sep 6, 2026	1,001-5,000	701 contacts →
	Exact match “OFG is an international company with more than 20 years of experience in the telecommunications sector.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
5	Avatel Telecom	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	1,001-5,000	698 contacts →
	Exact match “Somos Avatel Telecom, compañía de telecomunicaciones en España.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
6	Vodafone España	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	1,001-5,000	613 contacts →
	Exact match “Vodafone España es una empresa de telecomunicaciones con más de 15 millones de clientes.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
7	ONO	Exact match	Pozuelo De Alarcón, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
8	Commcenter	Exact match	A Coruña, SpainHQ recorded Sep 6, 2026	501-1,000	372 contacts →
	Exact match “CommCenter es uno de los distribuidores de telecomunicaciones independientes de mayor impacto en nuestro país.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
9	Adamo Telecom Iberia S.A.U	Exact match	Barcelona, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
10	Telxius	Exact match	Madrid, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
11	Telyco Selección	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	1,001-5,000	184 contacts →
	Exact match “Quiénes somos?” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
12	Aire Networks	Exact match	Elche, SpainHQ recorded Sep 6, 2026	201-500	177 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
13	Telecor	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	501-1,000	140 contacts →
	Exact match “TELECOR, S.A, somos una empresa del Grupo El Corte Inglés que comenzamos nuestra actividad en marzo de 1995 comercializando y prestando servicios de Telecomunicaciones y, a partir…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
14	Cableworld	Exact match	Alicante, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
15	Instelca	Exact match	Málaga, SpainHQ recorded Sep 6, 2026	201-500	118 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
16	Gamma Comunicaciones	Exact match	Cerdanyola Del Vallés, SpainHQ recorded Sep 6, 2026	51-200	105 contacts →
	Exact match “VozTelecom es la compañía especialista en comunicaciones cloud y líder en telefonía IP dentro del segmento de la pequeña y mediana empresa en España.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
17	Nokia Tecss	Exact match	Alcobendas, SpainHQ recorded Sep 6, 2026	201-500	104 contacts →
	Exact match “NOKIA TECSS somos una empresa de servicios del sector de las Telecomunicaciones.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
18	Cableven	Exact match	Málaga, SpainHQ recorded Sep 6, 2026	501-1,000	103 contacts →
	Exact match “Empresa cualificada y especializada en la instalación y mantenimiento de redes y equipos de telecomunicaciones.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
19	Cablescom	Exact match	Zaragoza, SpainHQ recorded Sep 6, 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 6, 2026 · View company records in RevenueBase
20	Sarenet	Exact match	Zamudio, SpainHQ recorded Sep 6, 2026	51-200	90 contacts →
	Exact match “Sarenet es el proveedor de voz y datos con más experiencia de cuantos hoy operan en España.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
21	Coyser SA	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	51-200	88 contacts →
	Exact match “Coyser S.A.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
22	Afr-Ix Telecom	Exact match	Sant Adrià De Besòs, SpainHQ recorded Sep 6, 2026	51-200	85 contacts →
	Exact match “AFR-IX telecom is a global telecommunications infrastructure group with licensed operations and infrastructure presence across Europe, Africa, Middle East and the Americas…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
23	Deltacomgroup	Exact match	San Sebastián De Los Reyes, SpainHQ recorded Sep 6, 2026	201-500	81 contacts →
	Exact match “Your Network is Our Business DeltaComGroup is a global supplier of top quality telecommunications systems, components and services.” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
24	B2com	Exact match	Madrid, SpainHQ recorded Sep 6, 2026	51-200	72 contacts →
	Exact match “Premium Numbers, operador de telecomunicaciones inscrito en la CMT y con numeración propia, fue fundada en el año 2.001, siendo una de las empresas del sector de la telefonía de…” Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
25	Ausarta	Exact match	Erandio, SpainHQ recorded Sep 6, 2026	51-200	72 contacts →
	Exact match “Tu operador de Telecomunicaciones” Recorded in the RevenueBase company graph · Sep 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 “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 768 telecommunications companies based in Spain

See the full list, filter by size, metro and specialty, and access 6,990 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Telecommunications companies based in Spain at a glance

As of Sep 6, 2026

9.8%Verified-email coverage

0.7%Mobile-number coverage

92.5Average contacts per company

11-50Median size (employees)

14.5%Largest-city concentration · Madrid

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

336

11-50

292

51-200

201-500

501-1,000

1,001-5,000

10001+

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

5,7960–30

49231–60

461–90

190–180

697180+

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 “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 6,990 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 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.

Telecommunications companies by metro

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

How many telecommunications companies are there based in Spain?

RevenueBase identified 768 company matches for 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?

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

Which city has the most telecommunications companies?

Madrid leads with 111 company records, followed by Barcelona (49) and Murcia (22).

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 6,990 professional contacts with verified work emails tracked across these 768 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 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.