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

Non-authoritative answer:
activity.renren.com	canonical name = c.l.renren.com.
Name:	c.l.renren.com
Address: 120.133.12.123
Name:	c.l.renren.com
Address: 120.133.12.124