如何用 dig 或者 nslookup 命令获取到阿里云 RDS 数据库公网 host 的 IP 地址

我的阿里云 rds 公网 host 为 xxxxo.mysql.rds.aliyuncs.com 我用 dig, nslookup 命令解析不到对应的 ip 。 dig 输出的信息如下:

; <<>> DiG 9.18.1-1ubuntu1.1-Ubuntu <<>> xxxxo.mysql.rds.aliyuncs.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 26374
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0

;; QUESTION SECTION:
;xxxxo.mysql.rds.aliyuncs.com. IN A

;; AUTHORITY SECTION:
rds.aliyuncs.com.       460     IN      SOA     hidden-master.aliyun.com. hostmaster.aliyun-inc.com. 2072074962 7200 900 2592000 600

;; Query time: 39 msec
;; SERVER: 172.18.208.1#53(172.18.208.1) (UDP)
;; WHEN: Thu Apr 27 10:34:30 CST 2023
;; MSG SIZE  rcvd: 138