shell:$ nslookup -timeout=2 -retry=1 'fastly-public-purge.twimg.com'
Server:		75.98.161.224
Address:	75.98.161.224#53

Non-authoritative answer:
fastly-public-purge.twimg.com	canonical name = twimg.twitter.map.fastly.net.
Name:	twimg.twitter.map.fastly.net
Address: 146.75.8.159