shell:$ nslookup -timeout=2 -retry=1 'web.wechat.com'
;; communications error to 75.98.161.224#53: timed out
Server:		69.39.86.5
Address:	69.39.86.5#53

Non-authoritative answer:
web.wechat.com	canonical name = web1.wechat.com.
Name:	web1.wechat.com
Address: 43.159.235.48
Name:	web1.wechat.com
Address: 129.226.106.72