Company lists · Data refreshed September 2026

Top 25 Telecom network operators based in Spain

Name: Telecom network 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 264 companies tracked

RevenueBase identified 264 telecom network operators headquartered in Spain as of September 2026 and tracks 63,211 professional contacts across them, including 6,484 with verified work emails. Madrid is the largest hub.

This list covers telecom network 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

264Companies

63,211Contacts tracked

6,484Verified emails

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The 25 largest telecom network operators based in Spain

Ranked by team size

Top 25 of 264 telecom network 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 network 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	Telefónica	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	10001+	54,718 contacts →
	Partial evidence “Telefónica is today one of the largest telecommunications companies in the world in terms of market capitalisation and number of customers.” Source: RevenueBase Database · checked Sep 19, 2026
2	Digi Spain Telecom	Partial evidence	Alcobendas, SpainHQ checked Sep 19, 2026	10001+	2,658 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
3	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
4	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
5	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
6	Telxius	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	201-500	294 contacts →
	Indirect evidence “As the world’s needs for uninterrupted global interconnectivity continue to rise, we are preparing the road ahead.” Source: RevenueBase Database · checked Sep 19, 2026
7	Aire Networks	Partial evidence	Elche, SpainHQ checked Sep 19, 2026	201-500	177 contacts →
	Partial 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
8	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
9	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
10	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
11	Sarenet	Indirect evidence	Zamudio, SpainHQ checked Sep 19, 2026	51-200	90 contacts →
	Indirect evidence “Sarenet es el proveedor de voz y datos con más experiencia de cuantos hoy operan en España.” Source: RevenueBase Database · checked Sep 19, 2026
12	Coyser SA	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	88 contacts →
	Indirect evidence “Coyser S.A.” Source: RevenueBase Database · checked Sep 19, 2026
13	B2com	Partial evidence	Madrid, SpainHQ checked Sep 19, 2026	51-200	72 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 19, 2026
14	Ausarta	Partial evidence	Erandio, SpainHQ checked Sep 19, 2026	51-200	72 contacts →
	Partial evidence “Tu operador de Telecomunicaciones” Source: RevenueBase Database · checked Sep 19, 2026
15	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
16	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
17	Gotor Comunicaciones	Partial evidence	Zaragoza, SpainHQ checked Sep 19, 2026	51-200	45 contacts →
	Partial evidence “Ingeniería, Consultoría e Instalación de Telecomunicaciones Trabajamos a nivel local, regional y nacional tanto para pequeñas y medianas empresas como para grandes organizaciones.” Source: RevenueBase Database · checked Sep 19, 2026
18	Silbö Telecom	Indirect evidence	Madrid, SpainHQ checked Sep 19, 2026	11-50	41 contacts →
	Indirect evidence “Silbö es la nueva telco que solo te contará cosas que suenan bien.” Source: RevenueBase Database · checked Sep 19, 2026
19	Mattelco	Indirect evidence	Sabadell, SpainHQ checked Sep 19, 2026	51-200	37 contacts →
	Indirect evidence “Confiamos en que nuestros valores y filosofía nos van a llevar muy lejos.” Source: RevenueBase Database · checked Sep 19, 2026
20	Fibranet Telecomunicaciones	Partial evidence	Murcia, SpainHQ checked Sep 19, 2026	51-200	35 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 19, 2026
21	Olin Group	Strong evidence	Madrid, SpainHQ checked Sep 19, 2026	n/a	32 contacts →
	Strong evidence “At Olin Group we are experts in telecommunications services in the regional market; both for wholesalers, with our high-speed Olinfra network, and for retailers through the…” Source: RevenueBase Database · checked Sep 19, 2026
22	Akiwifi	Indirect evidence	Castellón, SpainHQ checked Sep 19, 2026	11-50	32 contacts →
	Indirect evidence “AKIWIFI, el operador nacional de ámbito local.” Source: RevenueBase Database · checked Sep 19, 2026
23	Zertia Telecomunicaciones S.L	Partial evidence	Alcobendas, SpainHQ checked Sep 19, 2026	51-200	29 contacts →
	Partial evidence “Zertia Telecomunicaciones es un proveedor global de Servicios Gestionados de Telecomunicaciones para empresas, que ofrece soluciones y proyectos a medida, encargándose de la…” Source: RevenueBase Database · checked Sep 19, 2026
24	Apfutura	Partial evidence	Sant Just Desvern, SpainHQ checked Sep 19, 2026	11-50	29 contacts →
	Partial evidence “At APFutura we are dedicated to delivering end-to-end telecommunications solutions to our customers.” Source: RevenueBase Database · checked Sep 19, 2026
25	Delinternet Telecom	Partial evidence	Deltebre, SpainHQ checked Sep 19, 2026	11-50	28 contacts →
	Partial evidence “Benvinguts/es a Delinternet, la teva operadora de telecomunicacions de referència a les Terres de l'Ebre.” 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 network 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 network operators.
Partial evidence: Its own public description names part of telecom network operators, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name telecom network 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 264 telecom network operators based in Spain

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Telecom network operators based in Spain at a glance

As of Sep 19, 2026

10.3%Verified-email coverage

239.4Average contacts per company

11-50Median size (employees)

12.5%Largest-city concentration · Madrid

Sep 19, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

106

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 264 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 network 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 network 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 network 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 network 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, 6,484 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 network operators by metro

Telecom network operators in Madrid33

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 network 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 network operators are there based in Spain?

RevenueBase identified 264 telecom network 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?

Telefónica, headquartered in Madrid, tops this list with the largest team on record.

Which city has the most telecom network operators?

Madrid leads with 33 headquartered companies, followed by Murcia (12) and Malaga (11).

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 6,484 verified decision-maker contacts tracked across these 264 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.