[dns-operations] finding the longest encloser

[Jim Reid]

On 17 Feb 2010, at 00:06, Mark Andrews wrote:

> Note res_findzonecut() has done this sort of thing for over a decade.
> Make a SOA query and look at the authority section to determine the
> zone cut if possible otherwise strip off a label and requery.

res_findzonecut() wasn't an option for the problem space Mark: stub  
resolvers in handsets and telco-supplied CPE that would only lookup  
NAPTR records. Not that this matters now. The draft died. As has  
public ENUM, just about.