[dns-operations] NS records for TLD's which don't resolve.

[Mark Andrews]

As part of our EDNS compliance testing we noticed that the following
name servers listed in the root zone failed to resolve to a A or
AAAA record.  <https://ednscomp.isc.org/compliance/tld-report.html#na>

gw. ns4.dns.pt: no address records found (NXDOMAIN)
td. ns1.nic.td: no address records found (NXDOMAIN)
xn--fzc2c9e2c. ns3.ac.lk: no address records found (NXDOMAIN)
xn--mgbc0a9azcg. hariss.anrt.ma: no address records found (NXDOMAIN)
xn--xkc2al3hye2a. ns3.ac.lk: no address records found (NXDOMAIN)

Please ensure that address records exist in the DNS at the above
names or remove the corresponding NS record from zone and the
delegating NS records in the root zone.

nr. ns1.net.reach.com: address lookups failed

The nameservers that serves net.reach.com return REFUSED for all
lookups for ns1.net.reach.com.  Please fix this server or remove
the corresponding NS record from zone and the delegating NS records
in the root zone.

; <<>> DiG 9.12.0-pre-alpha+hotspot+add-prefetch+marka <<>> ns1.net.reach.com @202.84.128.228 +norec
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: REFUSED, id: 25263
;; flags: qr; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;ns1.net.reach.com.		IN	A

;; Query time: 129 msec
;; SERVER: 202.84.128.228#53(202.84.128.228)
;; WHEN: Fri Jan 27 15:54:12 EST 2017
;; MSG SIZE  rcvd: 46

Mark
-- 
Mark Andrews, ISC
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE:	+61 2 9871 4742		         INTERNET: marka at isc.org