Thessaloniki · Greece
PeeringDB records three internet exchanges in Thessaloniki and four colocation facilities holding 100 network presences. GR-IX::Thessaloniki is the best connected exchange with 20 participants, ahead of MIX Thessaloniki with 15 and THESS-IX with 12. An address that geolocates here names the block's registered location, not the device using it.
Internet exchanges in Thessaloniki
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::Thessaloniki Greek Internet Exchange - Thessaloniki | 20 | |
MIX Thessaloniki | 15 | none in the registry |
THESS-IX Thessaloniki - Internet Exchange | 12 | 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 |
|---|---|---|
| Balkan Gate Thessaloniki | 53 | Stadiou |
| Synapsecom SNC-1 Thessaloniki | 24 | Pontou 56 |
| Lancom Thessaloniki DC | 19 | Vasileos Irakliou 40 |
| KLH-GSN-DC - Greekstream Networks - Thessaloniki | 4 | Konstantinoupoleos Str. |
What a Thessaloniki IP address tells you
Three exchanges operate in Thessaloniki, and PeeringDB counts 47 distinct peers across them. GR-IX::Thessaloniki has 20 participants, MIX Thessaloniki 15 and THESS-IX 12. More weight sits in the colocation buildings, where Balkan Gate Thessaloniki alone holds 53 network presences, Synapsecom SNC-1 24, Lancom Thessaloniki DC 19 and Greekstream's KLH-GSN-DC 4, a total of 100 across four sites. Nova's mobile AS25472 appears on the GR-IX::Thessaloniki participant list, while Cosmote's AS29247 is on none of the three.
An address that geolocates to Thessaloniki reflects what its operator registered for the block, not where the device sits. Cosmote announces mobile subscribers on AS29247 and Nova on AS25472, each covering ground well past one city, and mobile traffic reaches the internet through a small number of gateways rather than from the tower a handset attaches to. Vodafone Greece has no mobile ASN recorded in the carrier registry. Geolocation databases copy the operator's own published location, so the city label follows a registry entry rather than a measurement.
Checking an address works better at the prefix level. The origin ASN says which network announces the block, and the netname on the whois record names the party that registered it. An origin of AS29247 or AS25472 marks mobile access, where the city field is a declaration and nothing firmer. A block that traces back to Balkan Gate Thessaloniki or Synapsecom SNC-1 sits in one of the four facilities the snapshot lists, and the building is a closer read on its position than the label a database assigns.
Mobile carriers in Greece
A mobile address in Thessaloniki 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 Thessaloniki?
PeeringDB lists three. GR-IX::Thessaloniki, the Thessaloniki site of the Greek Internet Exchange, has 20 participants. MIX Thessaloniki has 15 and THESS-IX 12. Together they account for 47 distinct peering networks, so a network in the city can exchange traffic locally rather than carrying it further.
Do Greek mobile carriers peer in Thessaloniki?
Nova does. Its mobile AS25472 is among the participants at GR-IX::Thessaloniki. Cosmote's mobile AS29247 is not listed at GR-IX::Thessaloniki, MIX Thessaloniki or THESS-IX, and Vodafone Greece has no mobile ASN in the carrier registry, so the snapshot places it nowhere.
Does an IP that geolocates to Thessaloniki mean the device is there?
No. The label comes from the location an operator published for the address block. Mobile subscribers on Cosmote's AS29247 or Nova's AS25472 leave through gateways that can sit anywhere on those networks, and a hosted address in one of the city's four facilities belongs to a machine, not to a person.
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