Dear Colleagues,
The RIPE NCC received the IPv6 address range 2001:4000::/23
from the IANA in June 2004.
You may wish to adjust any filters you have in place accordingly.
More information on the IP space administered by the RIPE NCC
can be found on our web site at:
<https://www.ripe.net/ripe/docs/smallest-alloc-sizes.html>
Regards,