AS11271 SENCINET LATAM BRASIL LTDA

AS11271 belongs to Sencinet LATAM Brasil Ltda, the Brazilian arm of Sencinet — the managed-connectivity operator formed when the CIH Group bought BT's domestic Latin American business in October 2020. Headquartered in São Paulo, it sells corporate WAN, data-centre and managed network services to enterprises across the region.

What it's used for

RIS observes 7 IPv4 prefixes carrying 32,768 addresses, one IPv6 prefix (2800:23::/32), and three observed neighbours. Read the neighbour count against the address count and the answer is not ambiguous: 32,768 addresses is a substantial estate, but three BGP adjacencies is an enterprise-scale edge, not a wholesale carrier's. A transit provider selling connectivity accumulates neighbours in the dozens or hundreds. This network has three.

That fits what Sencinet actually is. Its business is managed corporate networking — private WAN links, MPLS, cloud on-ramps, hosted services for large customers — delivered over infrastructure it operates rather than over a public transit market. Customer traffic largely rides private circuits. The public address estate carries the company's own edge and the internet-facing pieces of the services it runs for enterprise clients. The single PTR the pack sampled, a-bl.sencinet.com.br on 200.219.160.5, is first-party infrastructure under the operator's own domain, which is what that looks like.

Notable

Every prefix RDAP resolved — the 200.218.128.0/18, 201.62.0.0/19 and 200.219.160.0/19 aggregates and the /24s carved from them — is registered to Sencinet LATAM Brasil Ltda itself in LACNIC. Self-registered space announced by its own registrant, with first-party reverse DNS on it, is a clean operator signal and rules out the IP-leasing shape.

Interesting

The registry handles are numeric (4458, 805, 70095) rather than named — LACNIC's convention, and a reminder that the RDAP name field carries whatever the registry chose to put there. The address estate itself long predates the Sencinet brand: this is the network BT ran in Brazil until 2020, relabelled rather than rebuilt.