shell:$ nslookup -timeout=2 -retry=1 'ultimateota.d.miui.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
ultimateota.d.miui.com	canonical name = ultimateota.d.miui.com.mgslb.com.
ultimateota.d.miui.com.mgslb.com	canonical name = ultimateota.d.miui.com.enacdn.net.
ultimateota.d.miui.com.enacdn.net	canonical name = zmxxiaomi-ultimateota.v.enacdn.net.
zmxxiaomi-ultimateota.v.enacdn.net	canonical name = zxmru.v.enacdn.net.
Name:	zxmru.v.enacdn.net
Address: 143.14.203.245
Name:	zxmru.v.enacdn.net
Address: 151.242.229.120
Name:	zxmru.v.enacdn.net
Address: 143.14.203.246
Name:	zxmru.v.enacdn.net
Address: 151.242.229.119
Name:	zxmru.v.enacdn.net
Address: 143.14.203.249
Name:	zxmru.v.enacdn.net
Address: 143.14.203.248