[dns-operations] check if a domain has been registered via DNS
ietf-dane at dukhovni.org
Thu Apr 27 18:16:48 UTC 2017
> On Apr 27, 2017, at 1:33 PM, Doug Barton <dougb at dougbarton.us> wrote:
> What would work for your situation is to test for the presence of NS records at the registry level, and if they are absent to fall back to whois to confirm.
Some subdomains of public suffix parent domains are CNAMEs, and only
the target of the CNAME has NS records.
;; QUESTION SECTION:
;vwtelecom.eu. IN NS
;; ANSWER SECTION:
vwtelecom.eu. 86400 IN CNAME www.vwtelecom.com.
www.vwtelecom.com. 86400 IN CNAME vwtelecom.com.
vwtelecom.com. 86400 IN NS ns1.openprovider.nl.
vwtelecom.com. 86400 IN NS ns3.openprovider.eu.
vwtelecom.com. 86400 IN NS ns2.openprovider.be.
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