我试了下小米的 `cdn` 解析, 分别测试了 `223.5.5.5` 和 `114.114.114.114`. 返回内容是存在不一致, 但是最后得到的 IP 都还在浙江区域.
- 通过 `223.5.5.5` DNS 返回响应 CDN 结果列表
```shell
dig @
223.5.5.5
cdn.cnbj1.fds.api.mi-img.com; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.15 <<>> @
223.5.5.5
cdn.cnbj1.fds.api.mi-img.com; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 5544
;; flags: qr rd ra; QUERY: 1, ANSWER: 10, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 1408
;; QUESTION SECTION:
;
cdn.cnbj1.fds.api.mi-img.com. IN A
;; ANSWER SECTION:
cdn.cnbj1.fds.api.mi-img.com. 2 IN CNAME
cdn.cnbj1.fds.v.mi-dun.com.
cdn.cnbj1.fds.v.mi-dun.com. 2 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.mgslb.com.
cdn.cnbj1.fds.api.mi-img.com.mgslb.com. 2 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.download.ks-cdn.com.
cdn.cnbj1.fds.api.mi-img.com.download.ks-cdn.com. 2 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com.
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 115.231.173.57
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 115.227.35.43
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 115.227.35.44
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 115.231.173.58
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 183.136.140.24
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 2 IN A 115.231.173.56
```
- 通过 `114.114.114.114` DNS 返回响应 CDN 结果列表
dig @
114.114.114.114
cdn.cnbj1.fds.api.mi-img.com; <<>> DiG 9.11.4-P2-RedHat-9.11.4-26.P2.el7_9.15 <<>> @
114.114.114.114
cdn.cnbj1.fds.api.mi-img.com; (1 server found)
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 60920
;; flags: qr rd ra; QUERY: 1, ANSWER: 7, AUTHORITY: 0, ADDITIONAL: 1
;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 512
;; QUESTION SECTION:
;
cdn.cnbj1.fds.api.mi-img.com. IN A
;; ANSWER SECTION:
cdn.cnbj1.fds.api.mi-img.com. 541 IN CNAME
cdn.cnbj1.fds.v.mi-dun.com.
cdn.cnbj1.fds.v.mi-dun.com. 541 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.mgslb.com.
cdn.cnbj1.fds.api.mi-img.com.mgslb.com. 541 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.download.ks-cdn.com.
cdn.cnbj1.fds.api.mi-img.com.download.ks-cdn.com. 541 IN CNAME
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com.
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 128 IN A 115.231.173.58
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 128 IN A 183.136.140.24
cdn.cnbj1.fds.api.mi-img.com.jsd.ksyunv5.com. 128 IN A 115.227.35.44
;; Query time: 12 msec
;; SERVER: 114.114.114.114#53(114.114.114.114)
;; WHEN: Mon Nov 11 14:05:33 CST 2024
;; MSG SIZE rcvd: 305
```