Company lists · Data refreshed September 2026

Top 25 Internet service providers based in Spain

Name: Internet service providers based in Spain
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 251 companies tracked

Find 251 internet service providers based in Spain, with company records and 7,099 contacts, including 253 email addresses. The list was updated in September 2026 and includes providers across the market, with Madrid as the single most-represented city. Use it to research potential vendors, partners, and sales prospects.

Internet service providers are companies that provide internet access to households, businesses, public organizations, or other customers through wired, wireless, fiber, cable, satellite, or other network connections. This list covers companies that provide internet access services directly to residential, commercial, government, or institutional customers. Ranked by team size, largest first. Data current as of September 6, 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 6, 2026 86% judged on-target in blind review

251Companies

7,099Contacts tracked

253Verified emails

63Mobile numbers

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The 25 largest internet service providers based in Spain

Ranked by team size

Top 25 of 251 internet service providers based in Spain, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to internet service providers: 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	Digi Spain Telecom	Indirect evidence	Alcobendas, SpainHQ checked Sep 6, 2026	10001+	2,658 contacts →
	“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: company website · checked Sep 6, 2026
2	ONO	Indirect evidence	Pozuelo De Alarcón, SpainHQ checked Sep 6, 2026	1,001-5,000	396 contacts →
	“ONO es la compañía de comunicación y entretenimiento por fibra óptica líder en España.” Source: company website · checked Sep 6, 2026
3	Adamo Telecom Iberia S.A.U	Indirect evidence	Barcelona, SpainHQ checked Sep 6, 2026	51-200	298 contacts →
	“Adamo is a telecom operator with Swedish origin operating in Spain since 2007.” Source: company website · checked Sep 6, 2026
4	Telxius	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	201-500	294 contacts →
	“As the world’s needs for uninterrupted global interconnectivity continue to rise, we are preparing the road ahead.” Source: company website · checked Sep 6, 2026
5	Cableworld	Strong evidence	Alicante, SpainHQ checked Sep 6, 2026	201-500	132 contacts →
	“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: company website · checked Sep 6, 2026
6	Huawei CBG España	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1,001-5,000	66 contacts →
	“La misión de Huawei se basa en su propósito de enriquecer la vida a través de la comunicación.” Source: company website · checked Sep 6, 2026
7	Netllar Telecom	Indirect evidence	Albal, SpainHQ checked Sep 6, 2026	201-500	52 contacts →
	“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…” Source: company website · checked Sep 6, 2026
8	WIBER	Indirect evidence	Motril, SpainHQ checked Sep 6, 2026	51-200	51 contacts →
	“Tarifa plana de calidad y buen servicio.” Source: company website · checked Sep 6, 2026
9	EMBOU	Indirect evidence	Zaragoza, SpainHQ checked Sep 6, 2026	11-50	50 contacts →
	“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: company website · checked Sep 6, 2026
10	Silbö Telecom	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	11-50	41 contacts →
	“Silbö es la nueva telco que solo te contará cosas que suenan bien.” Source: company website · checked Sep 6, 2026
11	Fibranet Telecomunicaciones	Indirect evidence	Murcia, SpainHQ checked Sep 6, 2026	51-200	35 contacts →
	“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: company website · checked Sep 6, 2026
12	Apfutura	Indirect evidence	Sant Just Desvern, SpainHQ checked Sep 6, 2026	11-50	29 contacts →
	“At APFutura we are dedicated to delivering end-to-end telecommunications solutions to our customers.” Source: company website · checked Sep 6, 2026
13	7play	Indirect evidence	Las Rozas De Madrid, SpainHQ checked Sep 6, 2026	51-200	28 contacts →
	“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…” Source: company website · checked Sep 6, 2026
14	BG Group BG Mobile BG Smart BG Energía	Indirect evidence	Sant Cugat Del Vallès, SpainHQ checked Sep 6, 2026	11-50	28 contacts →
	“BG MOBILE - Distribuidor Vodafone Empresas Especialistas en Digitalización y nuevas tecnologías para empresas.” Source: company website · checked Sep 6, 2026
15	Bluevía	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	51-200	26 contacts →
	“Somos un operador de red que ofrece servicios mayoristas de acceso FTTH y otros servicios de conectividad sobre tecnología de fibra.” Source: company website · checked Sep 6, 2026
16	Connectivity	Strong evidence	Barcelona, SpainHQ checked Sep 6, 2026	11-50	21 contacts →
	“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…” Source: company website · checked Sep 6, 2026
17	PC Mancha	Indirect evidence	Quintanar De La Orden, SpainHQ checked Sep 6, 2026	11-50	17 contacts →
	“PC Mancha es un operador local de telecomunicaciones y servicios tecnológicos que ofrece soluciones de conectividad, comunicaciones, seguridad y soporte informático para empresas…” Source: company website · checked Sep 6, 2026
18	Redi Ibérica DE Redes	Indirect evidence	Valencia, SpainHQ checked Sep 6, 2026	11-50	17 contacts →
	“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…” Source: company website · checked Sep 6, 2026
19	Onsicom Operador DE Telecomunicaciones	Strong evidence	La Rinconada, SpainHQ checked Sep 6, 2026	51-200	16 contacts →
	“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…” Source: company website · checked Sep 6, 2026
20	Maxen Technologies	Indirect evidence	Canet De Mar, SpainHQ checked Sep 6, 2026	11-50	11 contacts →
	“Maxen Technologies es una Operadora de Telecomunicaciones especializada en aportar soluciones de conectividad vía radio o vía fibra óptica que se ajusten a las necesidades…” Source: company website · checked Sep 6, 2026
21	Eports	Indirect evidence	Tortosa, SpainHQ checked Sep 6, 2026	51-200	10 contacts →
	“A finales de junio de 2016, dos de las operadoras pioneras de telecomunicaciones locales en el sector de las TIC (NetPorts, fundada en 2009, y Ebretic, fundada en 2012) decidieron…” Source: company website · checked Sep 6, 2026
22	Cartago Telecom	Indirect evidence	Cartagena, SpainHQ checked Sep 6, 2026	11-50	10 contacts →
	“Conectando a Cartagena y sus alrededores: ¡Descubre nuestra operadora de telecomunicaciones en el corazón de Murcia!” Source: company website · checked Sep 6, 2026
23	Youtel Network S.L	Strong evidence	Aljaraque, SpainHQ checked Sep 6, 2026	11-50	9 contacts →
	“YOUTEL NETWORK SL is an Internet Service Provider company based out of Aljaraque, Huelva, Spain.” Source: company website · checked Sep 6, 2026
24	Lineox	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	1-10	9 contacts →
	“Lineox es una compañía creada por Asterion Industrial Partners - firma de inversión independiente - tras adquirir toda la red de radioenlaces de Telefónica en España.” Source: company website · checked Sep 6, 2026
25	Elanta	Indirect evidence	Madrid, SpainHQ checked Sep 6, 2026	11-50	8 contacts →
	Source: company website · checked Sep 6, 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: internet service providers. 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 internet service providers.
Partial evidence: Its own public description names part of internet service providers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name internet service providers. 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 251 internet service providers based in Spain

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Internet service providers based in Spain at a glance

As of Sep 6, 2026

3.6%Verified-email coverage

0.9%Mobile-number coverage

28.3Average contacts per company

11-50Median size (employees)

9.6%Largest-city concentration · Madrid

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

112

11-50

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

2370–30

1531–60

061–90

090–180

1180+

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 internet service providers, 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 “internet service providers”. 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 internet service providers), 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 internet service providers, 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, 253 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 6, 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.

Frequently asked

How many internet service providers are based in Spain?

RevenueBase counts 251 internet service providers listed based in Spain. The directory also includes 7,099 contacts and 253 email addresses.

What does an internet service provider do?

An internet service provider delivers internet access to customers through network connections such as fiber, cable, wireless, or satellite. Providers may serve residential, business, government, or institutional customers.

Which city has the most internet service providers in the list?

Madrid is the single most-represented city among the internet service providers on the list. The list was updated in September 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.