Google Cloud DNS explanation

Question

I tried using Google Public DNS to Resolve DNS Records where I tried 36032b.cc.. Below is the result but can somebody explain to me the results? I can not find in the internet any guide on these results.. What does Status:0 means? What is TC, RD, RA, AD. Why do I have multiple answers?

{
  "Status": 0,
  "TC": false,
  "RD": true,
  "RA": true,
  "AD": false,
  "CD": false,
  "Question": [
    {
      "name": "36032b.cc.",
      "type": 1
    }
  ],
  "Answer": [
    {
      "name": "36032b.cc.",
      "type": 5,
      "TTL": 299,
      "data": "982020.ssl-cdnweb.net."
    },
    {
      "name": "982020.ssl-cdnweb.net.",
      "type": 1,
      "TTL": 299,
      "data": "18.140.5.212"
    },
    {
      "name": "982020.ssl-cdnweb.net.",
      "type": 1,
      "TTL": 299,
      "data": "139.99.120.10"
    }
  ],
  "Additional": [],
  "Comment": "Response from 159.138.76.159."
}

score 1 · Accepted Answer · answered Mar 28 '21 at 14:16

The issue at hand here is a combination of the JSON data just showing the raw values of identifiers in some cases, not the more human and search-friendly names corresponding to these values, but also understanding DNS in general.

For reference regarding the raw values, such as "status 0", etc, I would recommend consulting the IANA registry for DNS parameters.

If you look at the DNS RCODEs section there, you can see that "status 0" is NOERROR, in the Resource Record (RR) TYPEs section you can see that "type 5" is CNAME and "type 1" is A, and in the DNS Header Flags section you can see the flags TC (Truncated) , RD (Recursion Desired) , RA (Recursion Available), AD (Authentic Data).

Regarding why you have multiple records in the answer:
In your 36032b.cc A query, the name you looked up (36032b.cc) turned out to be an alias (had a CNAME record), and the canonical name (982020.ssl-cdnweb.net) had two A records. Hence three records in the answer.

To just quickly get more readable and search-friendly results you could use for example dig which pretty-prints the full response (including the names of things such as known status codes and types):

; <<>> DiG 9.11.28-RedHat-9.11.28-1.fc33 <<>> 36032b.cc
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 6182
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;36032b.cc.                     IN      A

;; ANSWER SECTION:
36032b.cc.              299     IN      CNAME   982020.ssl-cdnweb.net.
982020.ssl-cdnweb.net.  300     IN      A       139.99.120.10
982020.ssl-cdnweb.net.  300     IN      A       18.140.5.212

;; Query time: 1202 msec
;; SERVER: 139.162.131.5#53(139.162.131.5)
;; WHEN: Sun Mar 28 14:00:11 UTC 2021
;; MSG SIZE  rcvd: 105

Google Cloud DNS explanation

1 Answers1