Dear Töma, Thank you for your question and my apologies for the delayed reply.
We de-register resources in accordance with "Closure of Members, Deregistration of Internet Resources and Legacy Internet Resources”: https://www.ripe.net/publications/docs/ripe-716#b The steps we take with regards to de-registration and quarantine are also described in: https://www.ripe.net/manage-ips-and-asns/resource-management/quarantine-for-returned-internet-number-resources The resources are held in quarantine long enough to allow interested parties to notice the de-registration and remove potential blacklisting records. Furthermore, we only re-use address space that is not routed. We'd like to note that in April 2018, we finished allocating IPv4 blocks from the previously-unused 185.0.0.0/8. https://labs.ripe.net/Members/wilhelm/so-long-last-8-and-thanks-for-all-the-allocations Since then, we issued more than 9,000 /22 IPv4 allocations - all of them were from address blocks that were already issued in the past and then de-registered and re-used. Sometimes we receive questions about incorrect geo-location for such address blocks (which are still pointing to the previous resource holders). In a few recent cases, we have seen reports about newly issued blocks being blacklisted. When requested, we contact relevant blacklisting providers to clarify the situation about resources being re-used and ask them to remove existing listings related to previous resource holders. We are currently reviewing our procedures to see if we could pro-actively provide blacklisting providers with information on address blocks returned to our free pools. This could help to reduce the possibility of re-issued blocks being blacklisted. Please also note that RIPE Policy Proposal 2019-08 is currently open and (if accepted) will require the creation of ROAs for all unallocated and unassigned address space under our control.: https://www.ripe.net/participate/policies/proposals/2019-08 If you have any questions, please let me know. Kind regards, Nikolas Pediaditis Registration Services and Policy Development Manager RIPE NCC > On 26 Nov 2019, at 16:47, Töma Gavrichenkov <[email protected]> wrote: > > Peace, > > There's a page[1] on the NCC web site which says: > > "When we recover IPv4 addresses, we hold on to them for a quarantine > period. During this time, we take a number of actions that help to > make it clear the addresses are no longer associated with their > previous holder and should be considered as “new” address space." > > Is the particular list of actions applied to an IPv4 prefix outlined > somewhere? Is it only prevention of routing, or e.g. trash cans like > Spamhaus are contacted too? > > [1] https://www.ripe.net/manage-ips-and-asns/ipv4/how-waiting-list-works > > -- > Töma >
