AS11921 SECRELNET INFORMATICA LTDA

AS11921 is SECRELNET Informática Ltda, an internet provider based in Fortaleza, Ceará, in north-eastern Brazil, trading as Secrel. Registro.br records the ASN as registered in 1999 to a Brazilian company with a Fortaleza administrative contact, so this is a long-lived regional operator rather than reissued space.

What it's used for

RIS shows a real access network of regional size: 36 IPv4 prefixes carrying 28,672 addresses, one IPv6 prefix (2804:1470::/32), and 27 observed neighbours. Twenty-seven peers is the interesting number. It is far too few for a wholesale transit carrier, but far more than the two or three an enterprise or a single-homed reseller keeps — it is the signature of a regional ISP that shows up at a local exchange point and peers directly with the networks around it, which in Fortaleza means IX.br.

The address inventory is entirely LACNIC space (201.49.0.0/18, 200.150.128.0/20, 200.233.64.0/20, 200.194.96.0/21 and their deaggregates), announced with the covering aggregates alongside the more specifics — routine traffic engineering across multiple upstreams, not the scattered multi-RIR pattern of leased address blocks. The company sells fibre internet to homes and buildings in the Fortaleza metro area alongside business services.

Notable

The evidence pack's registrant lookups for these prefixes all failed, which is a gap in the record and not a clearance — nothing here confirms who each block is registered to. The Brazilian company registration, the ASN's own registro.br record and the consistent LACNIC-Brazil addressing are what place this network in Ceará.