shell:$ nslookup -timeout=2 -retry=1 'tiles-a.basemaps.cartocdn.com'
Server:		127.0.0.53
Address:	127.0.0.53#53

Non-authoritative answer:
tiles-a.basemaps.cartocdn.com	canonical name = basemaps.cartocdn.com.
basemaps.cartocdn.com	canonical name = j.sni.global.fastly.net.
Name:	j.sni.global.fastly.net
Address: 151.101.2.132
Name:	j.sni.global.fastly.net
Address: 151.101.66.132
Name:	j.sni.global.fastly.net
Address: 151.101.130.132
Name:	j.sni.global.fastly.net
Address: 151.101.194.132