NAPTR - Naming Authority Pointer [RFC 2915]

with nslookup (As of 2013.08.31):

> set querytype=NAPTR
> e164.arpa
Authoritative answers can be found origin = pri.authdns.ripe.net mail addr = dns.ripe.net
serial = 1373405926
refresh = 3600
retry = 600
expire = 864000
minimum = 7200

With dig e164.arpa:

;; Got answer
from:e164.arpa
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 46745
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;e164.arpa. IN A
;; AUTHORITY SECTION:
e164.arpa. 3600 IN SOA pri.authdns.ripe.net. dns.ripe.net. 1373405926 3600 600 864000 7200
;; Query time: 49 msec
;; SERVER: 130.237.216.10#53(130.237.216.10)
;; WHEN: Sat Aug 31 15:38:27 2013
;; MSG SIZE rcvd: 87

Slide Notes

M. Mealling and R. Daniel, “The Naming Authority Pointer (NAPTR) DNS Resource Record”, RFC 2915, September 2000, Obsoleted by RFCs 3401, 3402, 3403, 3404. http://www.rfc-editor.org/rfc/rfc2915.txt Links to an external site.

Transcript

[slide222] Now, if we go and look up that pointer, which we can do with nslookup, what do we find? Anyone know? well we actually see that that points to ripe.net. So who is RIPE? Anyone know? It is the resource manager for IP addresses in Europe. So they have the responsibility for being this top tier.