Hi Gert, thanks for your clarification! But you still get my point, do you? If a prefix was assigned to an entity other than the one that is advertising the prefix, for example: 80.187.128.0/22 Announcing: Deutsche Telekom AG (AS3320) Assigned: T-Mobile Deutschland GmbH (AS44178) The information (original prefix receiver) is stored in the RIPE DB, right? It could be compared to what we see via BGP. I am aware that a single entity can have multiple AS numbers, but when different entities are "involved", more transparency would be great. Or am i missing something here? BR, Simon On 29.06.22 10:54, Gert Doering wrote:
Hi,
Another example would be a multi ASN company which announces all prefixes from a single ASN via BGP, even though the prefixes are assigned to various AS numbers. Since the RIRs do have the information, to which AS a specific prefix is assigned to,
On Wed, Jun 29, 2022 at 10:30:22AM +0200, Simon Brandt via ripe-atlas wrote: prefixes are not assigned to "AS" numbers, ever.
prefixes are assigned to entities, as are AS numbers.
ROAs and/or route(6): objects are used to tie both together - and it's in the authority of the network (prefix) holder to state which AS is allowed and expected to announce a given prefix, not the RIR.
Repeat: the RIR has no say in "which AS is tied a prefix".
Gert Doering -- NetMaster