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,

On Wed, Jun 29, 2022 at 10:30:22AM +0200, Simon Brandt via ripe-atlas wrote:

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,

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