Madrid · Spain
PeeringDB records seven internet exchanges in Madrid and 21 facilities holding 468 network presences. DE-CIX Madrid is the best connected with 189 participants, ahead of ESpanix Madrid Lower LAN at 160. An address that geolocates to Madrid names the location its operator published for that block, not the position of a device.
Internet exchanges in Madrid
An exchange is a shared switch where networks hand traffic to each other directly. Participant counts come from PeeringDB, where each network maintains its own record.
| Exchange | Participants | Registry carriers peering |
|---|---|---|
DE-CIX Madrid | 189 | |
ESpanix Madrid Lower LAN Espanix Lower LAN | 160 | |
IXPlay Global Peers | 62 | |
ESpanix Madrid Upper LAN Espanix Upper LAN | 56 | none in the registry |
1-ES FREE | 18 | none in the registry |
Equinix Madrid Equinix Internet Exchange Madrid | 12 | none in the registry |
MegaIX Madrid | 3 | none in the registry |
Exchange records: PeeringDB.
Colocation facilities
Buildings where networks put equipment. The network count is how many PeeringDB members list a presence there, which shows where capacity in the city sits.
| Facility | Networks present | Address |
|---|---|---|
| Digital Realty Madrid MAD1-2 | 231 | C/ Albasanz 71 |
| Digital Realty Madrid MAD3 | 48 | Calle de Emilio Muñoz 49-51 |
| Espanix Datacenter | 43 | Mesena 80 |
| Digital Realty Madrid MAD4 | 25 | Calle de Alfonso Gómez 4 |
| IaaS Datacenter Madrid | 20 | Maraton 12 |
| Global Switch Madrid | 19 | Calle Yecora, 4 |
| IPCore Datacenter Madrid | 17 | Calle Marzo 16 |
| Equinix MD1 - Madrid | 14 | Calle Isabel Colbrand 6-8 |
| nLighten Madrid MAD1 | 11 | c/ Lezama, 4 |
| Cogent Madrid | 11 | Subestacion Electrica de REE, PD Majuelos Nuevos San Sebastian de los Reyes |
| Templus DC Madrid MAD03 | 8 | C/ Albasanz 65 |
| Templus DC Madrid MAD02 | 7 | Avenida de Manoteras, 42 |
Showing the 12 facilities with the most networks, of 21 recorded.
What a Madrid IP address tells you
Two exchanges carry most of Madrid's peering. DE-CIX Madrid counts 189 participants and ESpanix Madrid Lower LAN 160, with IXPlay Global Peers at 62 and the ESpanix Upper LAN at 56. The remaining three exchanges are small, 1-ES FREE with 18 participants, Equinix Madrid with 12 and MegaIX Madrid with three. Colocation holds comparable weight, since 21 facilities record 468 network presences and Digital Realty Madrid MAD1-2 alone accounts for 231. Vodafone Spain on AS12430 and Orange Spain on AS12479 peer at DE-CIX Madrid and at the ESpanix Lower LAN, where Movistar on AS3352 also appears.
An address that geolocates to Madrid reflects a registry record, not a measurement. An operator announces a block and publishes a location for it, and geolocation databases follow that published location. Spanish mobile traffic compounds this, because Movistar, Orange Spain and Vodafone Spain aggregate subscribers behind a small number of gateways; a handset connected anywhere in the country can present an address the databases read as Madrid, and a Madrid registration says nothing about which cell tower the device is using.
The origin ASN on the specific prefix carries more information than the city label. A block announced from AS3352, AS12479 or AS12430 belongs to a mobile network whose footprint covers all of Spain, while a prefix originating from a network present in one of Madrid's 21 facilities is tied to a building the snapshot names. The netname on the prefix identifies the party that registered it, and a whois record showing a Madrid address means the registration is Madrid's, nothing more.
Mobile carriers in Spain
A mobile address in Madrid is routed by one of the country's operators. Each entry lists the operator's ASNs, so you can check which network an address belongs to.
Questions
Which internet exchanges are in Madrid?
PeeringDB lists seven. DE-CIX Madrid has 189 participants and ESpanix Madrid Lower LAN 160, followed by IXPlay Global Peers with 62 and ESpanix Madrid Upper LAN with 56. 1-ES FREE has 18, Equinix Madrid 12 and MegaIX Madrid three. Across the city the snapshot counts 500 peers.
Do Spanish mobile carriers peer in Madrid?
Yes. Vodafone Spain (AS12430) and Orange Spain (AS12479) both appear on DE-CIX Madrid and on the ESpanix Madrid Lower LAN, and Movistar (AS3352) is on the ESpanix Lower LAN. Peering there does not mean their subscribers sit in Madrid; the exchange port is where their traffic meets other networks.
Does an IP that geolocates to Madrid mean the device is there?
No. Geolocation databases read the location an operator published for the address block, so the answer describes a registry entry rather than a device. Mobile addresses are the weakest case, because Spanish operators route subscribers through a few gateways and reuse the same blocks across the country.
Sources
- PeeringDB - exchanges, participant counts, facilities and network presence, snapshot 2026-09-07
- PROXIES.SX carrier and ASN registry - operator ASNs used to match peering participants