shell:$ nslookup -timeout=2 -retry=1 'pop3.aliyun.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
pop3.aliyun.com	canonical name = pop3.aliyun.com.gds.alibabadns.com.
Name:	pop3.aliyun.com.gds.alibabadns.com
Address: 59.82.37.27