Barueri · Brazil

Barueri has no exchange of its own in PeeringDB and 0 recorded peer connections, but it holds 850 network presences across 13 facilities. Equinix SP4 - São Paulo accounts for 592 of them and Equinix SP2 - São Paulo for 235, so two buildings carry about 97 percent of the total. The rest is thin. Scala Data Centers SGRUTB01 lists 16 networks, UPX São Paulo 3, and four Scala sites list none at all. No Brazilian mobile carrier ASN appears in the city's records, since there is no exchange here to record membership.

An address that a database places in Barueri is usually the registry entry for a block announced from these buildings. Several of the facilities carry São Paulo in their names while PeeringDB files them under Barueri, which is a fair warning about how loosely city labels attach to infrastructure. Operators register one administrative address per allocation, and mobile subscriber traffic leaves through a small set of gateways, so a phone many kilometres away can present an address recorded here. Databases repeat the published location.

With no exchange data to read, the origin ASN and the netname on the prefix carry the whole answer for an address in Barueri. Brazil's mobile ASNs are 22085 for Claro, 26615 for TIM and 26599 and 27699 for Vivo; a prefix announced by any other network is more likely a customer of one of the 13 facilities than a handset. The facility list tells you what kind of network is present, not who connects through it.