shell:$ nslookup -timeout=2 -retry=1 'api.twitter.com'
Server:		1.1.1.1
Address:	1.1.1.1#53

Non-authoritative answer:
api.twitter.com	canonical name = dynamic.x.map.fastly.net.
Name:	dynamic.x.map.fastly.net
Address: 151.101.66.146
Name:	dynamic.x.map.fastly.net
Address: 151.101.130.146
Name:	dynamic.x.map.fastly.net
Address: 151.101.194.146
Name:	dynamic.x.map.fastly.net
Address: 151.101.2.146