shell:$ nslookup -timeout=2 -retry=1 'learn.khanacademy.org'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
learn.khanacademy.org	canonical name = prod.khan.map.fastly.net.
Name:	prod.khan.map.fastly.net
Address: 151.101.129.42
Name:	prod.khan.map.fastly.net
Address: 151.101.193.42
Name:	prod.khan.map.fastly.net
Address: 151.101.1.42
Name:	prod.khan.map.fastly.net
Address: 151.101.65.42