shell:$ nslookup -timeout=2 -retry=1 'appcfg.v.qq.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
appcfg.v.qq.com	canonical name = ins-su28bvwf.ias.tencent-cloud.net.
Name:	ins-su28bvwf.ias.tencent-cloud.net
Address: 121.14.76.43
Name:	ins-su28bvwf.ias.tencent-cloud.net
Address: 121.14.76.247
Name:	ins-su28bvwf.ias.tencent-cloud.net
Address: 121.14.78.51
Name:	ins-su28bvwf.ias.tencent-cloud.net
Address: 240e:928:1400:105::76
Name:	ins-su28bvwf.ias.tencent-cloud.net
Address: 240e:928:1400:106::56