| Digital Realty Madrid MAD1-2 | Digital Realty |  Madrid | 231 | 10 | 13 | PeeringDB |
| Equinix MD2 - Madrid | Equinix | Alcobendas | 82 | 6 | 12 | PeeringDB |
| Equinix BA1 - Barcelona | Equinix | Barcelona | 74 | 3 | 6 | PeeringDB |
| Templus DC Barcelona BCN01 | Templus | L'Hospitalet de Llobregat | 52 | 5 | — | PeeringDB |
| Digital Realty Madrid MAD3 | Digital Realty | Madrid | 49 | 1 | 7 | PeeringDB |
| Espanix Datacenter | https://www.espanix.net/es/ | Madrid | 44 | 6 | 4 | PeeringDB |
| NIXVAL Datacenter | Home Nixval IT Infrastructure | Paterna | 33 | 2 | 2 | PeeringDB |
| Digital Realty Madrid MAD4 | Digital Realty | Madrid | 25 | — | 4 | PeeringDB |
| IaaS Datacenter Madrid | IaaS datacenter | Madrid | 20 | 1 | 2 | PeeringDB |
| Global Switch Madrid | Global Switch | Madrid | 19 | 2 | 2 | PeeringDB |
| IPCore Datacenter Madrid | IPCore Datacenter SL | Madrid | 17 | 1 | — | PeeringDB |
| Equinix MD1 - Madrid | Equinix | Madrid | 14 | 1 | 5 | PeeringDB |
| DATA4 Madrid-Alcobendas - MAD1 | DATA4 - Smart Data Centers at Scale | Alcobendas | 12 | 4 | 3 | PeeringDB |
| Templus DC Málaga MAL01 | Templus | Málaga | 12 | 1 | 1 | PeeringDB |
| nLighten Madrid MAD1 | nLighten | Madrid | 12 | 1 | 1 | PeeringDB |
| Cogent Madrid | Cogent Communications | Madrid | 11 | 1 | — | PeeringDB |
| CSUC Campus Nord | CSUC | Barcelona | 9 | 1 | — | PeeringDB |
| Sevilla Datacenter | Sevilla Datacenter | Seville | 9 | — | — | PeeringDB |
| Barcelona Cable Landing Station | AFR-IX telecom | Sant Adrià de Besòs | 8 | 6 | 2 | PeeringDB |
| CPD Titan | CPD Titan | Murcia | 8 | — | — | PeeringDB |
| Telxius Derio DC | Telxius | Derio | 8 | — | 3 | PeeringDB |
| Templus DC Madrid MAD02 | Templus | Madrid | 8 | 4 | 2 | PeeringDB |
| Templus DC Madrid MAD03 | Templus | Madrid | 8 | 1 | 1 | PeeringDB |
| Templus DC Sevilla SEV01 | Templus | Seville | 8 | 1 | — | PeeringDB |
| Adam - PTV | Adam - Data Center | Cerdanyola del Vallès | 6 | — | — | PeeringDB |
| SYS4NET DATACENTER | sys4net | Alcantarilla | 6 | — | — | PeeringDB |
| Equinix MD6 | Equinix | Madrid | 5 | — | 2 | PeeringDB |
| Adam - MAD | Adam - Data Center | Alcalá de Henares | 4 | — | — | PeeringDB |
| Templus DC Barcelona BCN02 | Templus | Barcelona | 4 | — | 1 | PeeringDB |
| Templus DC Valencia VAL01 | Templus | Paterna | 4 | — | — | PeeringDB |
| Verizon Madrid | Verizon Communications, Inc. | Madrid | 4 | — | — | PeeringDB |
| Andrino Telecom MAD1 | Andrino Telecom | Madrid | 3 | — | — | PeeringDB |
| Ibercom Madrid | Ibercom | Madrid | 3 | — | — | PeeringDB |
| IslaLink FSL | Islalink | Valencia | 3 | — | — | PeeringDB |
| CONSORCIO DE TELECOMUNICACIONES AVANZADA S.A. | CONSORCIO DE TELECOMUNICACIONES AVANZADA | Alcantarilla | 2 | — | — | PeeringDB |
| Civicos Networking DCLAGUNA | Civicos Networking | San Cristóbal de La Laguna | 2 | — | — | PeeringDB |
| Ibercom San Sebastian | Ibercom | San Sebastián | 2 | — | — | PeeringDB |
| KIO Murcia 1 (MUR1) | KIO | Murcia | 2 | — | — | PeeringDB |
| MERLIN Edged BAR01 - Barcelona-PLZ | Edged Spain | Barcelona | 2 | — | 2 | PeeringDB |
| NTT Madrid 1 Data Center (MAD1) | NTT | Las Rozas de Madrid | 2 | — | 1 | PeeringDB |
| Acens Technologies | Acens Technologies | Alcobendas | 1 | — | — | PeeringDB |
| Adam - BCN | Adam - Data Center | Barcelona | 1 | — | — | PeeringDB |
| Civicos Networking DCARRECIFE | Civicos Networking | Arrecife | 1 | — | — | PeeringDB |
| DIVERSITY CLOUD MAD1 | DIVERSITY | Arganda del Rey | 1 | — | — | PeeringDB |
| EdgeConneX Barcelona (EDCBCN01) | EdgeConneX | Sant Boi de Llobregat | 1 | 1 | 1 | PeeringDB |
| Iron Mountain Data Center - Madrid (MAD-1) | Iron Mountain Data Centers | San Fernando de Henares | 1 | — | — | PeeringDB |
| MERLIN Edged BIL03 - Bilbao-Arasur | Edged Spain | Rivabellosa | 1 | — | 2 | PeeringDB |
| MERLIN Edged MAD01 - Madrid-Getafe | Edged Spain | Getafe | 1 | — | 2 | PeeringDB |
| ODC Malaga | Olivenet Data Centers Spain | Málaga | 1 | — | — | PeeringDB |
| ParcBit CPD Palma | Soluciones Corporativas IP (SCIP) | Palma | 1 | — | — | PeeringDB |
| Plexval Datacenter | Axarnet | Paterna | 1 | — | — | PeeringDB |
| Television Torrevieja CPD (TVT-CPD) | Television Costa Blanca SL | Torrevieja | 1 | — | — | PeeringDB |
| iDataGreen | Pep Requena | Barcelona | 1 | — | — | PeeringDB |
| Adam | — | Cerdanyola del Vallès | — | — | — | OSM |
| Aire Canarias | AIRE | Spain | — | — | — | OSM |
| Altia Datacenter | Altia | Spain | — | — | — | OSM |
| Amazon Data Services Spain S.L.U. | Amazon Web Services | Spain | — | — | — | OSM |
| Amazon Web Services | Amazon Web Services | Spain | — | — | — | OSM |
| Amune Networks CPD ! | Amune Networks | San Javier | — | — | — | PeeringDB |
| CPD Gobierno de Navarra | Nasertic | Spain | — | — | — | OSM |
| CPD Gobierno de Navarra | Nasertic | Spain | — | — | — | OSM |
| Cantabria Datacenter | https://www.espanix.net/es/ | Madrid | — | 4 | — | PeeringDB |
| Centre de Processament de Dades IBM | — | Spain | — | — | — | OSM |
| Centro de Procesamiento de Datos Norte | Banco Santander | Spain | — | — | — | OSM |
| Centro de Procesamiento de Datos Sur | Banco Santander | Spain | — | — | — | OSM |
| Centro de Procesamiento de Datos del Gobierno de Cantabria | Gobienro de Cantabria | Santander | — | — | — | OSM |
| Civicos Networking - IAAS (MADRID) | Civicos Networking | Madrid | — | — | — | PeeringDB |
| Cloud Center Andalucía | — | Spain | — | — | — | OSM |
| CyrusOne Madrid 1 | CyrusOne | Madrid | — | — | 1 | PeeringDB |
| DATA4 - MAD2-DC01 | — | Spain | — | — | — | OSM |
| DATA4 MAD2-DC02 | — | Spain | — | — | — | OSM |
| Data 4 MAD2 Campus | DATA4 - Smart Data Centers at Scale | San Agustín del Guadalix | — | — | — | OSM |
| Data Center 3 Bilbao Arasur | Merlin Properties | Spain | — | — | — | OSM |
| Data Center KIO Valencia | KIO Networks España | Spain | — | — | — | OSM |
| EXA Edge DC Barcelona | EXA Infrastructure | Cerdanyola del Vallès | — | — | — | PeeringDB |
| EXA Edge DC Basauri | EXA Infrastructure | Basauri | — | — | 1 | PeeringDB |
| EXA Edge DC Hereña | EXA Infrastructure | Hereña | — | — | 1 | PeeringDB |
| EXA Edge DC Valencia | EXA Infrastructure | Valencia | — | — | 1 | PeeringDB |
| Equinix BA2 - Barcelona | Equinix | Barcelona | — | — | 1 | PeeringDB |
| Espacio Rack | Espacio Rack | Pozuelo de Alarcón | — | — | — | PeeringDB |
| IUKANET Datacenter | IUKANET | Alfafar | — | — | — | PeeringDB |
| IXPlay Neutral Acces Point | IXPlay Neutral Datacenter | Benahavis | — | — | — | PeeringDB |
| Magdalena Datacenter | https://www.espanix.net/es/ | Madrid | — | 4 | — | PeeringDB |
| Microsoft MAD01 | Microsoft | Spain | — | — | — | OSM |
| Microsoft MAD02 | Microsoft | Spain | — | — | — | OSM |
| Mozoilo AJVP | Mozoilo | Galdakao | — | — | — | OSM |
| N1 | Nabiax | Spain | — | — | — | OSM |
| N2 | Nabiax | Spain | — | — | — | OSM |
| N3 | Nabiax | Spain | — | — | — | OSM |
| NTT | NTT | Spain | — | — | — | OSM |
| OASIX ALICANTE AIRENETWORKS | Aire Networks del Mediterraneo S.L.U. | Elche | — | — | — | PeeringDB |
| Pozuelo de Alarcon | CLOUDBUILDERS | Pozuelo de Alarcón | — | — | — | PeeringDB |
| TEDRA LE01 | https://tedra.com/es/ | León | — | — | — | PeeringDB |
| TecnoAlcalá | Telefonica de España | Alcalá de Henares | — | — | — | PeeringDB |
| The Weaver | — | Spain | — | — | — | OSM |
| Vozelia Telecom Madrid | Sewan.es | Madrid | — | — | — | PeeringDB |
| centro de datos trasbase Negratín | — | Spain | — | — | — | OSM |
| inforland.com | inforland.com | Spain | — | — | — | OSM |