AS15535 — VIRTUALXS-AS

Network type: hosting

AS15535 announces 1 IPv4 prefixes covering 2,048 addresses and 0 IPv6 prefixes.

About this network

Every address answers with the same name, and the name is an advertisement.

What it's used for

• A hosting provider. A single IPv4 /21 announced from the Netherlands, no IPv6, two thousand addresses, through one observed BGP neighbour.

Notable

• All three sampled addresses return an identical name, written entirely in capitals, reading as a statement that the address is hosted by the company.
• Because the name is the same for every address, it identifies nothing beyond the provider.
• The one block carries a netname with the country code, the company code and an allocation date, with the company and an abuse role as registrants.
• Nothing else is announced: no second block, no IPv6, no fragments.
• Three addresses were queried for reverse DNS and all three returned a name.

Interesting

• A single wildcard name across a whole block is the least informative reverse record that still counts as one. It satisfies systems that check whether a name exists, without saying anything about the host.
• Some receivers will accept mail from an address with any name and reject one with none, so a wildcard is a cheap way to clear that bar for two thousand addresses at once.
• The cost is that nobody, including the provider, can tell two addresses apart from their names. Every trace, every log line and every abuse report points at the same string.

This description is AI-generated, best-effort context — not authoritative, and provided without any guarantee of accuracy.

Announced prefixes

• 62.129.128.0/21

Upstream networks

• AS25151 Cyso Group B.V.

Adjacent networks

• AS25151 Cyso Group B.V.