1.1.1.1 failed to resolve studio.dev.tencent.com, which is cname to studio.tencentcloud.coding.net, and studio.tencentcloud.coding.net has an A record of 115.159.21.113.
dig results:
$ dig studio.dev.tencent.com @8.8.8.8
; <<>> DiG 9.10.6 <<>> studio.dev.tencent.com @8.8.8.8
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33021
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;studio.dev.tencent.com. IN A
;; ANSWER SECTION:
studio.dev.tencent.com. 59 IN CNAME studio.tencentcloud.coding.net.
studio.tencentcloud.coding.net. 59 IN A 115.159.21.113
;; Query time: 127 msec
;; SERVER: 8.8.8.8#53(8.8.8.8)
;; WHEN: Thu Dec 06 15:30:21 JST 2018
;; MSG SIZE rcvd: 111
$ dig studio.dev.tencent.com @1.1.1.1
; <<>> DiG 9.10.6 <<>> studio.dev.tencent.com @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 48825
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;studio.dev.tencent.com. IN A
;; ANSWER SECTION:
studio.dev.tencent.com. 60 IN CNAME studio.tencentcloud.coding.net.
;; Query time: 119 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Thu Dec 06 15:30:42 JST 2018
;; MSG SIZE rcvd: 95
$ dig studio.tencentcloud.coding.net @1.1.1.1
; <<>> DiG 9.10.6 <<>> studio.tencentcloud.coding.net @1.1.1.1
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 44934
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1452
;; QUESTION SECTION:
;studio.tencentcloud.coding.net. IN A
;; Query time: 12 msec
;; SERVER: 1.1.1.1#53(1.1.1.1)
;; WHEN: Thu Dec 06 15:31:00 JST 2018
;; MSG SIZE rcvd: 59