Moving DNS out of non-cooperative provider

Alexander Gurvitz alex at
Mon Jun 18 15:49:36 UTC 2012

Can someone enlighten me on the following scenario
(I guess it's explained somewhere, but can't find the info.): was served by owner wants to move his domain to is not cooperating, and continues to serve 172800 NS
(* and now serve 172800 NS

Recursive resolver queried for every few minutes,
and currently have 45892 NS
in it's cache. have TTL of 3600.
Thus each hour queries,
with each query gets new NS record, and... refreshes the NS TTL ?

Will EVER query ?

I'd be happy to know how BIND behaves, but also
how other servers may behave in this case.

Alexander Gurvitz,
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