shell:$ nslookup -timeout=2 -retry=1 'u.uc123.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
Name:	u.uc123.com
Address: 168.235.206.1
Name:	u.uc123.com
Address: 168.235.205.6