shell:$ nslookup -timeout=2 -retry=1 'pro.x.com'
Server: 127.0.0.53
Address: 127.0.0.53#53
Non-authoritative answer:
pro.x.com canonical name = pro.x.com.cdn.cloudflare.net.
Name: pro.x.com.cdn.cloudflare.net
Address: 162.159.140.229
Name: pro.x.com.cdn.cloudflare.net
Address: 172.66.0.227
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