AS6729 DEMENIN-AS

Demenin B.V. is a Dutch company registered in Amsterdam that holds this AS along

with a string of other autonomous systems. What the address space is actually

used for is not something the public record settles, and this card does not

pretend otherwise.

What it's used for

• The AS announces a single IPv4 /24 plus a large IPv6 block. That is a very small footprint for an operator that holds this many AS numbers.
• The one IPv4 prefix it announces is not Demenin's own allocation: the block is registered to a different LIR, and its reverse DNS points at a Polish IP-services host. In other words, the routing and the registration belong to different parties.

Notable

• Demenin holds several autonomous systems and dozens of networks across them, while maintaining no direct peering — connectivity is entirely via transit. Taken together, the pattern is that of an address-space and routing operation rather than a network with its own users.
• Because the announced space is registered elsewhere and delegated onward, an address here tells you who is routing it, not who is using it. Treat any confident geolocation or use-classification of this AS with suspicion.

Interesting

• This is a good worked example of why the registered holder of an AS and the real-world operator of its traffic can be two entirely different things. The honest answer for AS6729 is that the second one is unknown.