AS14840 BR.Digital Provider

More BGP neighbours than any other network in this corpus, four reverse domains, and three incompatible ways of writing the same hostname.

What it's used for

• A Brazilian broadband operator. 72,960 addresses across 34 IPv4 prefixes plus 32 IPv6 prefixes, every announced block attributed to Brazil.

Notable

• Observed neighbours: 5,380. Nothing else carded so far comes close.
• Every netname is a bare number: 144851, 137387, 40365 and 3323, all registered to BR.Digital Telecom.
• Ten of eighteen sampled addresses returned a name, under four domains: commcorp.net.br, commcorp.com.br, br.digital and brdigital.net.br.
• The label formats disagree. One reads 186-211-144-0, another reverses the octets to 255-159-211-186, and a third mixes separators as 200.143.104-0.

Interesting

• Five thousand neighbours against 72,960 addresses is not a transit business, it is an exchange presence. Brazil's peering fabric lets a regional operator meet almost everyone in the country at once, so the adjacency count reflects who is in the room rather than what the network carries.
• Three label formats means three generations of reverse-zone generator, each written by someone who chose an octet order and a separator without checking the last one. All three still answer.
• The netnames are registry ticket numbers. They identify the block and describe nothing, which is the opposite trade from an operator that spells the city into every name.
• Two of the four reverse domains carry a brand that is not the one in the registrant field. A rename reaches the company records long before it reaches the DNS.