Looking up authoritative info for an ip

[Joseph S D Yao]

On Wed, Dec 15, 1999 at 12:02:56AM -0500, Michael Cunningham wrote:
> I know how to look up what dns servers are authoritative for 
> a perticular domain but how do you do a lookup (whois) to figure
> out what dns servers are authorative for the reverse dns information
> for an ip range/ip address?

You get more authoritative information for BOTH if you query the DNS
system itself.  The WHOIS records only carry that information for the
last time someone bothered to update those records.

If you have IP address, e.g., 208.225.64.3, then the corresponding
reverse IP address is 3.64.225.208.in-addr.arpa.  So, query:

	$ dig ns 64.225.208.in-addr.arpa
or
	$ nslookup -type=ns 64.225.208.in-addr.arpa

Just as, if you want to find the name server for "hiway1.exit109.com",
you query:

	$ dig ns exit109.com
or
	$ nslookup -type=ns exit109.com

-- 
Joe Yao				jsdy at cospo.osis.gov - Joseph S. D. Yao
COSPO/OSIS Computer Support					EMT-B
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