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Re: TLD anycast clouds?

  • From: william(at)
  • Date: Wed Oct 05 05:55:01 2005

On Wed, 5 Oct 2005, Elmar K. Bins wrote:

[email protected] (william(at) wrote:

authoritative DNS servers (and their IP addresses) and try that list
on the routing registries...
Assuming that you do that, what would you be your criteria to find based
on RR if the ip is anycasted or not?
Maybe I overestimate the openness of the people and believe everybody
would drop their documentation there...

~>whois -h
descr:        DENIC eG anycast prefix
origin:       AS31529
Interesting, I did not notice they put it in there...

As I have necessary tools to quicly filter such data from multiple DBs, you might be interested in the list of those self-reporting anycast in RR (its not very long): AS3557 - ISC F ROOT (source: OTTIX, VERIO, RIPE) AS24246 - INTERNAP (source: SAVVIS, RADB) AS32476 - Tellme Networks (source: RADB) AS27598 - IS.CO.ZA (source: RADB, RIPE) AS29117 - (source: RIPE) AS12859 - BIT.NL 6to4 relay RFC3068 (source: RIPE) AS33837 - PRQ.SE (source: RIPE) AS31529 - DENIC (source: RIPE) AS12654 - RIPE NCC RIS (source: RIPE) AS12654 - RIPE NCC RIS (source: RIPE) AS3344 - 6to4 relay RFC3068 (source: RIPE)

2001::500::/48 AS3557 - ISC F ROOT (source: RIPE)
2002::/16 AS3344 - 6to4 relay anycast - no longer done, right??

Getting back to the subject of anycast DNS TLDs, its possible that above
did provide a clue that one of the .ZA servers might be anycasted (although
NSZA.IS.CO.ZA is right now and not listed anycast in RR).

P.S. I will search for anycast in description of ip whois data when I get
a chance and if its not long and interesting may post summary here as well.

William Leibzon
Elan Networks
[email protected]