Truncation

Participating Internet Exchange Points (IXPs) may use open-source software which has been published by the South African ISP Association (operators of the Johannesburg and Cape Town IXPs) to truncate IPv4 addresses in flow exports to the nearest enclosing /24, and IPv6 addresses to the nearest enclosing /48. This has no effect on the resulting statistics, and ensures that no individual IP addresses (which may be categorized as Personally Identifiable Information, or PII, in some jurisdictions) are transmitted outside the perimeter of the IXP's control and responsibility.