Athens · Greece
PeeringDB records three internet exchanges in Athens with 94 distinct peers between them. GR-IX::Athens is the best connected with 66 participants, ahead of SEECIX at 17 and NVL-IX at 11. Three colocation facilities hold 25 network presences. An address that geolocates to Athens names the block's registered location, not a device's position.
Internet exchanges in Athens
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 |
|---|---|---|
GR-IX::Athens Greek Internet Exchange - Athens | 66 | |
SEECIX South East Europe Cloud & Interconnection Exchange powered by DE-CIX | 17 | |
NVL-IX | 11 | 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 |
|---|---|---|
| Lancom Athens DC | 14 | Leoforos Kifisias 44, Marousi |
| Synapsecom SNC-2 Athens | 10 | 14th VIOPA str, No 3 Ano Liosia |
| Εθνικό Ίδρυμα Ερευνών / National Hellenic Research Foundation (EIE/NHRF) | 1 | 48, Vas. Konstantinou |
What a Athens IP address tells you
One exchange carries most of the peering in Athens. GR-IX::Athens has 66 of the city's 94 participant slots, with SEECIX, the South East Europe Cloud and Interconnection Exchange powered by DE-CIX, at 17 and NVL-IX at 11. Colocation is thinner by comparison, with Lancom Athens DC at 14 networks, Synapsecom SNC-2 at 10 and the National Hellenic Research Foundation at 1, so 25 network presences across three sites. Nova's mobile AS25472 is on the participant lists at both GR-IX::Athens and SEECIX, while Cosmote's AS29247 appears at neither.
An address that geolocates to Athens reflects a registry record rather than a measurement. Cosmote announces mobile subscribers on AS29247 and Nova on AS25472, and each of those ASNs covers the whole of an operator's footprint instead of one city. Mobile traffic exits through a handful of gateways, so the address a phone presents ties to the gateway and to the location published for the block. Vodafone Greece has no mobile ASN in the carrier registry. Geolocation databases repeat what the operator filed.
Someone checking an address gets more from the prefix than from the city name. The origin ASN says which network announces it, and the netname on the whois record names who registered it. A block originating from AS29247 or AS25472 is mobile access and carries no dependable city. A block that traces to Lancom Athens DC or Synapsecom SNC-2 sits in one of the three facilities the snapshot lists, which is a firmer read than a database label on its own.
Mobile carriers in Greece
A mobile address in Athens 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 Athens?
Three. GR-IX::Athens, the Athens site of the Greek Internet Exchange, has 66 participants. SEECIX, the South East Europe Cloud and Interconnection Exchange powered by DE-CIX, has 17, and NVL-IX has 11. The three account for 94 distinct peering networks in the city.
Do Greek mobile carriers peer in Athens?
Nova does, at two exchanges. Its mobile AS25472 is listed at GR-IX::Athens and at SEECIX. Cosmote's mobile AS29247 does not appear at GR-IX::Athens, SEECIX or NVL-IX, and Vodafone Greece has no mobile ASN in the carrier registry, so nothing in the snapshot places it.
Does an IP that geolocates to Athens mean the device is there?
No. It means an operator registered that block to Athens. Mobile addresses on AS29247 and AS25472 aggregate subscribers from across a network behind a small set of gateways, and a hosted address in one of the city's three facilities belongs to a server rather than to anyone living there.
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