Cork · Ireland
PeeringDB records one exchange in Cork, INEX Cork, with 11 participants, and no colocation facility in the city. Those 11 participants are the whole of the city's recorded peer count. An IP that geolocates to Cork tells you what an operator wrote in a registry record, not where the device using it sits.
Internet exchanges in Cork
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 |
|---|---|---|
INEX Cork | 11 | none in the registry |
Exchange records: PeeringDB.
What a Cork IP address tells you
All of Cork's recorded peering sits at INEX Cork, an exchange with 11 participants, and those 11 are the city's entire peer count in PeeringDB. No colocation facility in Cork holds a registry record, so the data shows no network presences in the city outside that one exchange. None of Ireland's three mobile ASNs, 15751 for Eir, 13280 for Three Ireland and 15502 for Vodafone Ireland, appears on the INEX Cork participant list, so the registry gives no evidence of mobile peering in the city.
An address that geolocates to Cork may not belong to a device in Cork. An operator announces address blocks against a registry record whose address field names one place for a range that can serve subscribers across the country. Mobile traffic leaves through a small number of gateways, and a count of 11 peers in Cork says nothing about where any Irish operator puts those gateways. Geolocation databases follow the operator's own published location, so a block keeps its Cork label until the operator changes the entry.
Anyone checking a Cork address should read the routing data before the city name. The origin ASN names the network announcing the prefix, and a mobile ASN such as 15751, 13280 or 15502 means the address comes from a mobile pool rather than from a fixed connection tied to the 11 participants at INEX Cork. The netname and the registry entry on the specific prefix, rather than the parent allocation, show whether the operator described that range as Cork at all.
Mobile carriers in Ireland
A mobile address in Cork 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 Cork?
PeeringDB records one, INEX Cork, with 11 participants, and that exchange accounts for the whole of the city's 11 recorded peers. The registry lists no colocation facility in Cork, so it shows no network presences in the city beyond the exchange itself.
Do Irish mobile carriers peer in Cork?
Not on the public record. The INEX Cork participant list carries none of the three Irish mobile ASNs, 15751 for Eir, 13280 for Three Ireland and 15502 for Vodafone Ireland. PeeringDB records public peering, so private interconnection in the city would not show up there.
Does an IP that geolocates to Cork mean the device is there?
No. Geolocation databases follow the location an operator publishes for the block, and one registry entry can cover addresses used far from that address. Read the origin ASN and the netname on the prefix instead of trusting the city label.
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