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Quarantine for Returned Internet Number Resources

28 Aug 2012
Quarantine periods are in place for all Internet number resources returned to the RIPE NCC. You can find details below of the amount of time a resource must remain in the quarantine pool before it can be reallocated or reassigned.

IPv4

Returned IPv4 ranges are normally held in quarantine for three months  before re-use. However as the RIPE NCC reaches the last /8 of IPv4 address space that it holds, the length of time returned IPv4 address space will remain in the quarantine pool will gradually be reduced. This is to ensure that there is no more IPv4 address space available before the last /8 is reached.

The RIPE NCC ensures that:

  • The range is returned by the authoritative resource holder
  • The range is no longer routed
  • All related RIPE Database objects are deleted

 

IPv6

Returned IPv6 address ranges are held in quarantine for three months before re-use.

The RIPE NCC ensures that:

  • The range is returned by the authoritative resource holder
  • The range is no longer routed
  • All related RIPE Database objects are deleted

 

ASN

Returned ASNs that are referenced in other RIPE Database objects (for example in import/export policies) are held in quarantine until there are no more references. Returned ASNs that are not referenced in other RIPE Database objects are held in quarantine for three months before re-use.

Before these steps above, the RIPE NCC ensures that:

  • All RIPE Database objects with this ASN as an "origin" are deleted
  • The ASN is returned by the authoritative resource holder
  • The ASN is no longer routed