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

Non-authoritative answer:
a.vimeocdn.com	canonical name = a.vimeocdn.com.edgesuite.net.
a.vimeocdn.com.edgesuite.net	canonical name = a1982.g.akamai.net.
Name:	a1982.g.akamai.net
Address: 23.199.54.8
Name:	a1982.g.akamai.net
Address: 23.199.54.16