shell:$ nslookup -timeout=2 -retry=1 'docs.ray.io'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
docs.ray.io	canonical name = 8d85bbd3.domains.readthedocs.com.
8d85bbd3.domains.readthedocs.com	canonical name = proxy-fallback.readthedocs-hosted.com.
Name:	proxy-fallback.readthedocs-hosted.com
Address: 104.18.0.163
Name:	proxy-fallback.readthedocs-hosted.com
Address: 104.18.1.163
Name:	proxy-fallback.readthedocs-hosted.com
Address: 2606:4700::6812:a3
Name:	proxy-fallback.readthedocs-hosted.com
Address: 2606:4700::6812:1a3