[as112-ops] Questions about AS112 Server Operators Listing

[Xun Fan]

Hi all,

Our research group has been looking at assessing anycast usage.
(We have a technical report about our early findings at
ftp://ftp.isi.edu/isi-pubs/tr-671.pdf if you're interested.)

Now we are testing our new method by sending
DNS queries of name "hostname.as112.net" to a lot of open recursive name
servers to
find how many different AS112 nodes we can find in the Internet.
We evaluate the results through the operators list at
http://public.as112.net/node/10

We understand that the list is not complete, but as its last update was
less than a month ago, we have two questions:

1. Does it mean that ALL the operators in the list (
http://public.as112.net/node/10)
were running AS112 service at the last update time (Dec 22nd, 2011)?

2. If not, does anyone know if the following operators in the list
are still running AS112 service?
 - Abovenet Communications, Inc
 - Cogent Communications
 - Hurricane Electric
 - New Jersey International Internet Exchange, Inc
 - Teleglobe Inc.   (current owner seems to be Tata Communications)
We have recursive name servers in these operators' IP block, but
those recursive name servers led us to other AS112 nodes, so we
suspect they might have turned off their AS112 nodes.

Thank you very much!
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