Trondheim · Norway
PeeringDB records one internet exchange in Trondheim, TRDIX Trondheim, with 10 participants, plus four colocation facilities holding nine network presences between them. GlobalConnect Trondheim has six of those networks and NTNU three. An address that geolocates to Trondheim reflects where its operator registered the block, not where the device is.
Internet exchanges in Trondheim
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 |
|---|---|---|
TRDIX Trondheim | 10 | 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 |
|---|---|---|
| GlobalConnect Trondheim | 6 | Prinsensgt 39 |
| NTNU | 3 | Realfagsbygget Høgskoleringen 5 |
| ITsjefen NDC4 | 0 | Tungavegen 30 |
| ITsjefen NDC2 | 0 | Brattørkaia 17B |
What a Trondheim IP address tells you
TRDIX Trondheim is the only exchange PeeringDB records in the city, and its 10 participants are the whole of its public peering. Capacity otherwise sits in colocation, where PeeringDB lists four facilities and only two of them hold networks, GlobalConnect Trondheim with six and NTNU with three, while ITsjefen NDC2 and NDC4 record none. Nine facility network presences against 10 exchange participants is a small footprint, and the registry names no Norwegian mobile carrier peering at TRDIX.
An address that geolocates to Trondheim need not be a device in Trondheim. Operators announce address blocks against a registry record that carries one administrative address, and geolocation databases take that published location for the whole block. Mobile traffic widens the gap further, since handsets across a wide area exit through a handful of gateways and inherit an address tied to the gateway site. With only 10 networks peering locally, much of the traffic reaching users here comes in from networks that peer elsewhere, and the city tag on an address says little about that path.
Reading the origin ASN and the netname on the exact prefix tells you more than the city field does. The ASN names the network announcing the block, and the registry record behind the netname shows who holds it and how large the delegation is. Comparing that network against the 10 participants at TRDIX shows whether it has any presence in Trondheim, or whether the address is simply registered to an organisation with an address here.
Questions
Which internet exchanges are in Trondheim?
One. PeeringDB records TRDIX Trondheim with 10 participants and no second exchange in the city. The rest of the local network presence is in colocation, four facilities holding nine networks in total, of which GlobalConnect Trondheim accounts for six.
Do Norwegian mobile carriers peer in Trondheim?
Nothing in the data says they do. TRDIX Trondheim lists no participant flagged as a carrier ASN, and the carrier registry holds no Norwegian mobile operator entries at all, so the records for this city cannot answer the question.
Does an IP that geolocates to Trondheim mean the device is there?
No. The city label comes from the location an operator publishes for a registered block, and mobile addresses are usually assigned at a gateway serving a much wider area. The origin ASN and the netname on the specific prefix are firmer evidence.
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