shell:$ nslookup -timeout=2 -retry=1 'checkout.khanacademy.org'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
checkout.khanacademy.org	canonical name = hosted-checkout.stripecdn.com.
hosted-checkout.stripecdn.com	canonical name = hosted-checkout.stripecdn.com.cdn.cloudflare.net.
Name:	hosted-checkout.stripecdn.com.cdn.cloudflare.net
Address: 104.18.35.156
Name:	hosted-checkout.stripecdn.com.cdn.cloudflare.net
Address: 172.64.152.100
Name:	hosted-checkout.stripecdn.com.cdn.cloudflare.net
Address: 2a06:98c1:3103::6812:239c
Name:	hosted-checkout.stripecdn.com.cdn.cloudflare.net
Address: 2606:4700:4405::ac40:9864