The 109/8 range was removed from our ISP Ingress Prefix Filters in version 22 (dated 6-Feb-2009): ftp://ftp-eng.cisco.com/cons/isp/security/Ingress-Prefix-Filter-Template s/T-ip-prefix-filter-ingress-loose-check-v22.txt Thanks, John -----Original Message----- From: Matthew Walster [mailto:matthew@walster.org] Sent: Friday, October 09, 2009 7:22 AM To: nanog@nanog.org Subject: 109/8 - not a BOGON Hi there, A customer of mine is reporting that there are a large number of addresses he can not reach with his addresses in the 109/8 range. This was declassified as a BOGON and assigned by IANA to RIPE in January 2009. If you have a manually updated BOGON list, can I please ask that you review it and update it as soon as possible please? His addresses in 89/8 and 83/8 work just fine, hence this presumption of BOGON filtering. Matthew Walster