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-... 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-... 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 <ximaera@gmail.com> 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