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

Non-authoritative answer:
account.speedtestcustom.com	canonical name = zd.map.fastly.net.
Name:	zd.map.fastly.net
Address: 151.101.2.219
Name:	zd.map.fastly.net
Address: 151.101.66.219
Name:	zd.map.fastly.net
Address: 151.101.130.219
Name:	zd.map.fastly.net
Address: 151.101.194.219