[dns-operations] google DNS returns different result

yhpeng at orange.fr yhpeng at orange.fr
Mon Jul 4 03:04:02 UTC 2016


Hi members,

I dig www.qq.com from within a server in China.
Most the other public DNS servers return a CNAME to akamai CDN.
Only google's DNS returns a group of addresses which are China's IP.
Do you know why? Thanks.

$ dig www.qq.com @8.8.8.8

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.7 <<>> www.qq.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37376
;; flags: qr rd ra; QUERY: 1, ANSWER: 3, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.qq.com.                    IN      A

;; ANSWER SECTION:
www.qq.com.             299     IN      A       14.17.32.211
www.qq.com.             299     IN      A       59.37.96.63
www.qq.com.             299     IN      A       14.17.42.40

;; Query time: 52 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Mon Jul  4 10:54:29 2016
;; MSG SIZE  rcvd: 76


level3's DNS:

$ dig www.qq.com @209.244.0.3

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.7 <<>> www.qq.com 
@209.244.0.3
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 8533
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.qq.com.                    IN      A

;; ANSWER SECTION:
www.qq.com.             277     IN      CNAME   qq.com.edgesuite.net.
qq.com.edgesuite.net.   1590    IN      CNAME   a1574.b.akamai.net.
a1574.b.akamai.net.     14      IN      A       173.205.77.26
a1574.b.akamai.net.     14      IN      A       173.205.76.243

;; Query time: 166 msec
;; SERVER: 209.244.0.3#53(209.244.0.3)
;; WHEN: Mon Jul  4 10:59:26 2016
;; MSG SIZE  rcvd: 123


Comodo's DNS:

$ dig www.qq.com @8.26.56.26

; <<>> DiG 9.8.2rc1-RedHat-9.8.2-0.37.rc1.el6_7.7 <<>> www.qq.com 
@8.26.56.26
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 31750
;; flags: qr rd ra; QUERY: 1, ANSWER: 4, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;www.qq.com.                    IN      A

;; ANSWER SECTION:
www.qq.com.             108     IN      CNAME   qq.com.edgesuite.net.
qq.com.edgesuite.net.   1534    IN      CNAME   a1574.b.akamai.net.
a1574.b.akamai.net.     3       IN      A       2.21.75.67
a1574.b.akamai.net.     3       IN      A       2.21.75.66

;; Query time: 279 msec
;; SERVER: 8.26.56.26#53(8.26.56.26)
;; WHEN: Mon Jul  4 11:01:53 2016
;; MSG SIZE  rcvd: 123


regards.



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