AS15517 NETSTREAM-

The reverse names contain the letters for the record type, inside the record itself.

What it's used for

• A fibre and business connectivity provider. Twelve IPv4 prefixes and one IPv6 /32 announced from Switzerland, twenty-one thousand addresses, across forty-six observed BGP neighbours.

Notable

• Four answering addresses take the form of a gateway abbreviation, then the three letters naming the reverse record type, then the address in dashes, then a word for customer, then a country code, then the domain.
• The fifth answers under a different company's domain with a label for a subscriber line technology.
• Netnames disagree with each other: some carry the holding company and an allocation date, some name a fibre-to-the-home product, one names another brand, and one ends in a mixed-case customer number.
• The AS handle ends in a bare hyphen where a longer string was cut off.
• Eighteen addresses were queried for reverse DNS and five returned a name.

Interesting

• Putting the record type into the name is redundant in the way that filing a document in a folder called folder is redundant. It survives because a template generated it and nothing objected.
• Six levels of label in one name is a lot, but each one carries information: role, address, customer status, country. The zone is organised by what the operator needs to look up.
• Forty-six neighbours for twenty-one thousand addresses is heavy interconnection for a provider this size, which is what selling business connectivity requires.