South Australia · network infrastructure

Adelaide accounts for the state's capacity, and only four cities appear in the record at all. DigiCo Adelaide ADL2 records 38 networks, DigiCo Adelaide ADL1 in Edinburgh Parks records 29, NEXTDC A1 records 22 and Colocity DC3 records 20, with Equinix AE1 at 13. Nothing else reaches double digits. The state's five exchanges all sit in Adelaide, with EdgeIX Adelaide at 36 participants and IX Australia Adelaide (SA-IX) at 35, so South Australian networks meet in one city or peer outside the state.

An address block reads as South Australia because the operator holding it published a South Australian address on its registry record, and geolocation databases repeat what the registration says. Mobile addresses are pooled first. Telstra announces its mobile subscribers from AS1221, Optus from AS4804 and Vodafone Australia from AS133612, and each carrier routes handsets through a small number of gateways. A phone anywhere in the state can present an address that a database places in Adelaide, or in an entirely different state.

The prefix itself answers the question better than a lookup does. Check the origin ASN, which names the network announcing the route, then the netname and registered address on the covering object. The state records 153 network presences and 103 peering networks, a small enough set that the difference between a colocation range in Adelaide and a national carrier's gateway range shows up plainly in the registry.